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Rotary

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324 - Electricity: measuring and testing

324200000 - MAGNETIC

324207110 - Displacement

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DocumentTitleDate
20110175601HIGH RESOLUTION NON-CONTACTING MULTI-TURN POSITION SENSOR - Disclosed are systems and methods for effectively sensing rotational position of an object. In certain embodiments, a rotational position sensor can include a shaft configured to couple with the rotating object. The shaft can be configured to couple with a magnet carrier such that rotation of the shaft yields translational motion of the carrier. A magnet mounted to the carrier also moves longitudinally with respect to the axis of the shaft, and relative to a magnetic field sensor configured to detect the magnet's longitudinal position. The detected longitudinal position can be in a range corresponding to a rotational range of the shaft, where the rotational range can be greater than one turn. In certain embodiments, the rotational position sensor can include a programmable capability to facilitate ease and flexibility in calibration and use in a wide range of applications.07-21-2011
20090195243TILT ANGLE SENSOR AND DETECTION-TARGET DEVICE COMPRISING THE SAME - To provide a tilt angle sensor that is capable of detecting acceleration, a tilt angle, and the like of a device to which the tilt sensor angle is mounted, and also capable of reducing the size and the cost with a simple structure. The tilt angle sensor comprises: a spring member having a fixed end a free end that has a flexibility to be bent at least in one direction; a magnetic field generating device for generating a magnetic field, which is mounted at the free end of the spring member; a magnetic field detecting device provided by facing the magnetic field generating device for detecting a direction of the magnetic field generated by the magnetic field generating device; and a damping device for giving a damping force to a bending action of the spring member.08-06-2009
20120169325ROTATION ANGLE DETECTING DEVICE - Disclosed is a rotation angle detecting device wherein a filling member applied in a second housing section which houses an electromagnetic conversion element is prevented from entering a first housing section which houses a magnet. The rotation angle detecting device (07-05-2012
20100164486DETECTING DEVICE OF THE ANGULAR POSITION OF A ROTATING MEMBER OF AN ELECTRIC HOUSEHOLD APPLIANCE, IN PARTICULAR THE DRUM OF A WASHING MACHINE - A detecting device for detecting the angular position of an electric household appliance rotating member, typically the drum of a washing machine, including generating means of a magnetic field arrangeable in a fixed position with respect to the rotating member, e.g. carried by the frame of the electric household appliance; interaction means with the magnetic field generating means integrally arrangeable in use on the rotating member in a position so as to transit periodically in front of the generating means of a magnetic field and in position adjacent to the same to cause a spatial variation of the magnetic field flux lines between a first and a second field configuration; and means adapted to generate an electric signal when crossed by the flux lines of the magnetic field; wherein said signal generating means are integral with the magnetic field generating means and are arranged, with respect to the interaction means, on the same side as the magnetic field generating means, but in a position so as to be crossed by the flux lines only in said second field configuration.07-01-2010
20110193554Method For Determining Orientation of Elecromagnetic Receivers - Method for determining receiver orientation angles in a controlled source electromagnetic survey, by analyzing the survey data. For a given survey receiver, two data subsets are selected. (08-11-2011
20110193553Magnetic array sensor circuit to process an output from a magnetic sensor array - A magnetic array sensor circuit to process an output from a magnetic sensor array including a plurality of magnetic sensor elements arranged in an array. The circuit includes a regulating circuit to reduce an offset variation of the output from the magnetic sensor elements arranged in the array.08-11-2011
20110193552Displacement Measurement System and Method using Magnetic Encodings - A measurement system includes a rotating member configured to transfer mechanical energy to a point of use. The member has at a surface thereof one or more circumferentially oriented bands of magnetizable material. Each band has a magnetic pattern comprised of a plurality of transitions magnetically recorded in the magnetizable material of that band. A magnetic-field sensor is disposed sufficiently near each band of magnetizable material to sense a magnetic pattern recorded in that band as the member rotates. Each magnetic-field sensor generates signals in response to the magnetic pattern sensed by that magnetic-field sensor. Processing electronics is in communication with each magnetic-field sensor to receive the signals generated by that magnetic-field sensor while the member rotates and to dynamically compute from the signals a measurement associated with a performance of the rotating member.08-11-2011
20110193551ROTOR FOR ROTATION SENSOR - A rotor for a rotation sensor may be mounted on a bearing that supports a wheel on an automotive vehicle so that it can detect the number of revolutions for the wheel. The rotor for a rotation sensor 1 includes a reinforcing ring 2 formed like an L-shape in cross section, including a cylindrical part 3 adapted to be fitted on a peripheral surface of the rotating part of the bearing (inner race or outer race) and a flanged part 4 bent at an end edge of the cylindrical part 3, from which it extends in the radial direction. A multi-pole magnet 10 is attached to the axial outer lateral side of the flanged part 4, and a non-magnetic covering 6 encloses the axial outer lateral side of the multi-pole magnet 10 and has a peripheral edge on its one end secured to the reinforcing ring 2.08-11-2011
20100117633Angular position sensor for assembly on a rotating shaft - The angular position sensor is for assembly on a rotating shaft rotationally guided in a support structure, and includes an annular member having an inner surface socketed on the rotating shaft without relative rotation therebetween, and a housing in which a permanent magnet is inserted. A support is provided having a through hole through which the rotating shaft and the annular member extend, the through hole having an inner surface opposite and close to the annular member with a radial allowance, a cavity housing a sensor device capable of detecting variations in the magnetic field caused by the permanent magnet upon rotating with respect to the support together with the annular member, and an anchoring configuration by which the support is secured to a fixed structure.05-13-2010
20100072990Magnetic Rotation Sensing - Embodiments for rotation sensing are provided. A device may include a magnet apparatus including a first and a second magnet. The magnet apparatus may be configured to be coupled to a dial apparatus of a meter. The device may include a first magnetic field sensor and a second magnetic field sensor configured to be coupled to a dial cover. The magnetic field sensors may generate signals based upon the sensed magnetic fields. In some embodiments, the device may include logic for counting rotations and/or logic for detecting abnormal conditions such as a missing dial hand, missing dial cover, magnetic tampering and/or malfunctioning magnetic field sensors.03-25-2010
20100072989Magnetic Rotation Sensing - Embodiments for rotation sensing are provided. The device may include a magnet apparatus comprising a magnet, the magnet apparatus configured to be coupled to a dial apparatus of a meter. Also included may be a magnetic field sensor configured to be coupled to a dial cover. When the magnet apparatus is coupled to the dial apparatus and the magnetic field sensor is coupled to the dial cover, the distance between the magnet and the magnetic field sensor may be a function of the strength of the magnet and the sensitivity of the magnetic field sensor. Also, the magnetic field sensor may be configured to generate an analog signal. The device may also include a memory component storing logic configured to detect an abnormal condition based on a data value of the analog signal. The detected condition may be magnetic tampering, a missing dial cover, and/or a missing dial hand.03-25-2010
20100072988SYSTEM THAT OBTAINS A SWITCHING POINT WITH THE ENCODER IN A STATIC POSITION - A system including an encoder, multiple sensing elements and control logic. The encoder has a pole pitch and is configured to rotate in a direction of rotation. The multiple sensing elements are situated along the direction of rotation and span at least half the length of the pole pitch. The control logic is configured to receive signals from the multiple sensing elements based on the encoder in a static position and obtain a switching point based on the signals.03-25-2010
20130082693Device and method for processing signals which represent an angular position of a motor shaft - In an apparatus and a method for processing signals that represent an angular position of a shaft of a motor, a storage unit for storing arrival times of the signals in a memory is provided, the storage unit additionally evaluating a rotation direction datum of the shaft. Storage of the times in the memory is performed in a first sequence in the event of a rotation of the shaft in a first direction, and storage in the memory is performed in a second sequence that is opposite to the first sequence in the event of a rotation of the shaft in a second direction that is opposite to the first direction.04-04-2013
20100102802MINIATURE ROTARY ENCODER - A small rotary encoder capable of easily fitting a substrate into a proper position without using an adhesive or the like is provided. Slits are formed in an encoder case so that the encoder case is partially plate-spring shaped, a step portion and a claw portion are formed on the inner circumference of the encoder case, convex portions and concave portions that are combined with each other are formed on the inner circumference of the encoder case and a substrate, respectively. When the substrate is inserted into the encoder case, the encoder case is bent by the slits so that the substrate can be inserted into the encoder case. The substrate is inserted between the step portion and the claw portion, so that the substrate can be fitted into the encoder case, and the substrate is prevented from being incorrectly fitted in a circumferential direction, so that a position can be easily determined.04-29-2010
20100102801ROTATION SENSOR - A rotation detecting sensor, having excellent sealing capability to prevent water ingress from outside, being so robust that no damage occur in sensor component parts and circuits due to external force and/or thermal strains resulting from self-heating or change in ambient temperature, and inexpensive to manufacture, is provided. The rotation detecting sensor is fixed to a sensor fixing member to be fitted to a wheel support bearing assembly. A sensor unit, including a magnetic sensor element, a cable and a substrate, is fixed to the sensor fixing member through the substrate. A molding segment molded of a molding material bonded with the substrate is provided around the sensor unit. The substrate has a metallic pattern portion formed as a metallic coating on a substrate surface in the vicinity of an electroconductive pattern portion and the molding material is bonded to the metallic pattern portion.04-29-2010
20100102800ANGLE SENSOR - An angle sensor measures a rotated angle and the angular velocity of a rotary disc by sensing the magnetic field generated by a number of electromagnetic elements disposed on the rotary disc. The precision of the angle sensor is adjusted by selectively magnetizing the electromagnetic elements.04-29-2010
20100097054COUPLING DEVICE, PARTICULARLY FOR A SENSOR UNIT - The invention relates to a coupling device, particularly for a sensor unit, comprising at least one dog (04-22-2010
20100109655ROTATION ANGLE DETECTOR - A rotation angle detector for detecting rotation angle of a rotator to be measured is provided. The detector includes a magnet which is fixed to the rotator to be measured and is rotated with the rotator to be measured and plural magnetic detection means respectively arranged at a prescribed angle, for detecting intensity of magnetic field generated by the magnet and outputting signals of electric charge based on the intensity of magnetic field. The detector further includes drive means for driving the plural magnetic detection means, where the drive means is capable of simultaneously changing magnetic sensitivities of the plural magnetic detection means in the same ratio. The detector further includes rotation angle calculation means for calculating rotation angle of the rotator to be measured based on signals output from the plural magnetic detection means.05-06-2010
20120182009ROTATION ANGLE DETECTING DEVICE - Three magnetic sensors are arranged around a rotor at predetermined angular intervals about the rotation axis of the rotor. Sinusoidal signals having a phase difference of 120° are output from the magnetic sensors. A rotation angle computing device detects a magnetic pole transition in a first output signal as follows. The rotation angle computing device detects a magnetic pole transition in the first output signal based on a current value of one of the second and third sinusoidal signals, an absolute value of a difference between an immediately preceding value and the current value of the one of the second and third sinusoidal signals being larger than an absolute value of a difference between an immediately preceding value and the current value of the other of the second and third sinusoidal signals, an immediately preceding value of the first sinusoidal signal and a current value of the first sinusoidal signal.07-19-2012
20120182008ROTATION ANGLE DETECTING DEVICE - Three magnetic sensors are arranged around a rotor at predetermined angular intervals about the rotation axis of the rotor. Sinusoidal signals that have a phase difference of a predetermined degree of 45° are output from the respective magnetic sensors. A rotation angle computing device detects a magnetic pole transition in a first output signal as follows. Specifically, the rotation angle computing device detects a magnetic pole transition in the first output signal based on a value having a larger absolute value between a current value of the second sinusoidal signal and a current value of the third sinusoidal signal, an immediately preceding value of the first sinusoidal signal and a current value of the first sinusoidal signal.07-19-2012
20090302833MAGNETIC DETECTION APPARATUS - In a magnetic detection apparatus, a magnetic detection sensor generates a sensor output signal whose high level and low level have different potentials in accordance with the moving direction of a magnetic moving object, and a computer unit includes three comparator circuits and detects the output signal of the magnetic detection sensor with three levels of comparison threshold values, so that the moving direction of the magnetic moving object can be detected accurately without any delay.12-10-2009
20120217957ANGULAR POSITION SENSOR AND ASSEMBLY COMPRISING A ROTARY SYSTEM AND SUCH A SENSOR - The invention relates to a sensor (08-30-2012
20120217956HIGH RESOLUTION ABSOLUTE ORIENTATION ROTARY MAGNETIC ENCODER - A rotary encoder includes a magnet disposed on a rotational axis of the encoder. The magnet is polarized transversely to the rotational axis. A first magnetic sensor is disposed on the rotational axis proximate the on-axis magnet. A magnet ring is disposed rotationally coaxially with the rotational axis and has a selected diametric distance from the axis. The magnet ring has a plurality of alternatingly polarized magnets. A number of pole pairs in the magnet ring is selected to match an angular resolution of the first magnetic sensor. A second magnetic sensor is disposed proximate the magnet ring.08-30-2012
20090091316TURNING DEVICE POSITION SENSING SYSTEM AND METHOD - A system for determining an absolute position of a motor. The system includes first and second multi-polar magnetic rings, first and second processing units, and at least one external sensor The first multi-polar magnetic ring is concentrically positioned around the motor, and has a plurality of pole pairs. The second multi-polar magnetic ring is concentrically positioned around the first multi-polar magnetic ring, and has at least one pole pair. The first processing unit is positioned near the first multi-polar magnetic ring to determine an angular position over one of the pole pairs of the first multi-polar magnetic ring. The sensor is positioned external to the processing unit and over the second multi-polar magnetic ring to indicate a state of the pole pair of the second multi-polar magnetic ring. The second processing unit generates an absolute position of the motor based on the angular position and the state.04-09-2009
20090079423Angle sensor - The invention relates to an angle sensor which is only protected by an encasement body without having a surrounding protective housing.03-26-2009
20090267595MAGNETIC ENCODER - A magnetic encoder, which is formed annularly of a magnetic rubber material, is magnetized to be multipolar in the circumferential direction and has a detected surface read by a magnetic sensor, is provided with a three-dimensional shape (10-29-2009
20090267593RELATIVE ROTATIONAL POSITION DETECTION APPARATUS - A first sensor detects a rotational position of a first shaft in a noncontact fashion and generates a first output signal by phase-shifting a reference A.C. signal in accordance with the detected rotational position of the first shaft. A second sensor detects a rotational position of a second shaft in a noncontact fashion and generates a second output signal by phase-shifting the reference A.C. signal in accordance with the detected rotational position of the second shaft. First and second timing signals corresponding to phase shift amounts of the first and second output signals are output via respective output lines. Relative rotational position detection data, representing a rotational difference or amount of torsion between the two shafts, appears in a time difference between the first and second timing signals. A PWM signal, having a pulse width corresponding to a time difference between the first and second timing signals, may be output.10-29-2009
20090267594POSITION SENSOR AND POSITION SENSOR ARRANGEMENT FOR A CONTACTLESS DETERMINATION OF A POSITION BY MEANS OF REDUNDANT MAGNET-SENSITIVE SENSOR ELEMENTS - The present invention creates a position sensor and a position sensor arrangement on the basis of magnetic field sensing sensors maximizing reliability against defects and external interference signals and providing redundancy, in particular for shift-by-wire systems in automobiles. The invention includes various aspects and preferred embodiments that including individual sensors that can either only measure the direction of the magnetic field or in addition to that the absolute value of the magnetic field. The specific embodiments depend on the desired diagnostic options, redundancy and compensation capabilities both as to interfering magnetic fields and sensor failures or non-plausible output signals of individual sensors. An evaluation unit can be provided for compensating measurement deviations.10-29-2009
20120223702SPRING LOADED GEAR DRIVEN RESOLVER - A resolver apparatus can include a resolver driven gear, a resolver stator, a resolver rotor coupled to the resolver stator and a resolver rotor drive shaft coupled to the resolver rotor, wherein the resolver rotor drive shaft is spring loaded to the resolver driven gear.09-06-2012
20130063138MAGNETIC ENCODER - Provided is a magnetic encoder which includes plural rows of magnetic encoder tracks. One magnetic encoder track of the magnetic encoder tracks includes magnetic pattern magnetized thereto to generate signals of equal pitch for detection of rotation. The magnetized magnetic pattern includes N poles and S poles arranged in alternate fashion. The magnetic encoder is configured to be employed spaced through an air gap from sensors that read magnetic signals of the respective magnetic encoder tracks. The magnetic encoder track is configured such that the magnetic pattern thereof acting on position of the corresponding sensor is, under the interference of magnetism of the plural rows of magnetic encoder tracks, detected by the corresponding sensor as an equal pitch magnetic pattern.03-14-2013
20130063136RELATIVE ANGLE SENSING DEVICE - A relative angle sensing device that senses a relative rotation angle between first and second rotary shafts includes: a rotary component that is provided on one rotary shaft out of the first rotary shaft and the second rotary shaft, and that rotates together with the one rotary shaft; a supported component that generates a magnetic field and that is supported by the rotary component through an adhesive material; and a sensor that is provided in the other rotary shaft out of the first rotary shaft and the second rotary shaft, and that outputs a value corresponding to the magnetic field generated by the supported component. A transmitting unit is provided between the rotary component and the supported component. The transmitting unit transmits rotative force of the one rotary shaft to the supported component by direct contact with each other in a case of peeling of the adhesive material.03-14-2013
20130063137ROTATIONAL ANGLE DETECTION DEVICES - A rotational angle detection device may include a sensor wiring member and a motor wiring member. Each of the sensor wiring member and the motor wiring member includes a terminal body section and a connector section that are formed separately from each other and are electrically connected to each other via a connection structure.03-14-2013
20130134967METHOD AND CIRCUIT ARRANGEMENT FOR CHECKING THE ROTOR POSITION OF A SYNCHROUNOUS MACHINE - A method for validating a vehicle-to-X message, in which the message is received by an antenna arrangement having a least two antenna elements connected with a communication device. An electromagnetic field strength of the message is recorded based on different reception characteristics with different power densities, wherein the message includes an absolute position of a transmitter, and an absolute position of a receiver determined on the basis of global satellite navigation or on a map comparison. A first relative position of the transmitter is calculated from the absolute positions of the receiver and the transmitter. A second relative position is calculated from the ratio of the power densities or read out from a reference diagram. If a comparison of the first and second relative positions reveals a large degree of correspondence, the message is validated, and if a large degree of deviation is detected, the message is rejected.05-30-2013
20130134966RELATIVE ANGLE SENSING DEVICE AND ELECTRIC POWER STEERING APPARATUS - A relative angle sensing device is provided with: a sensor that is contained in a housing in which a communication hole communicating inside and outside is formed, and outputs an electric signal according to relative rotation angle between two rotary shafts coaxially arranged; an electric cable that transmits the electric signal outputted from the sensor to an apparatus arranged at outside of the housing; an electric cable holding member that is fitted with the communication hole of the housing and holds the electric cable; and an outer component that is arranged at a position outside the electric cable holding member in the communication hole of the housing, and that has, at inside thereof, a penetration hole through which the electric cable passes. The outer component has a pair of opening and closing components that is joined by a hinge and opens and closes the penetration hole by relative rotation.05-30-2013
20090009161Cylindrical Cover-attached encoder apparatus - A cylindrical cover-attached encoder apparatus, including a magnetic metal-based body having a cylindrical shape, a magnetic rubber-based encoder having a cylindrical shape and formed around the outer peripheral surface of said magnetic metal-based cylindrical body, and a nonmagnetic material-based cover having a cylindrical shape and adapted to be mounted on said magnetic rubber-based encoder for covering the outer peripheral surface of the cylindrical portion of said magnetic rubber-based encoder.01-08-2009
20090009159Robust solution for mitigating eccentricity in a rotary sensor apparatus - A robust solution for eccentricity issues in 360 degree rotary sensor application utilizing a hollow cylindrical magnet. A hollow cylindrical magnet design can be implemented to drive a parallel field magnetic sensor based oh Hall/AMR technologies. Eccentricity variations of ±0.46 mm on X and Y axes can be reduced by at least 20%, in turn improving the repeatability, linearity error and a correlation error associated with the sensor. For tilts of ±3 degrees, the error can be reduced to at least 50% compared to a solid magnet, thereby increasing the repeatability and accuracy of the rotary sensor. The disclosed design improves linearity, is robust in vibration and improves reliability in lifecycle as the sensor configuration is less affected by wear and tear due to mechanical vibrations.01-08-2009
20110018529Rotational position sensor - A rotational position sensor includes a rotating body rotatably supported around a predetermined axis line by a bearing portion of a housing and a sensor unit having a movable sensor element arranged at the rotating body to detect a rotational angle position of the rotating body and a fixed sensor element arranged at the housing. The rotating body includes a tapered annular contact face defining a part of a virtual cone face with a vertex on the axis line and the bearing portion includes a tapered annular bearing face rotatably supporting the annular contact face on the virtual cone face. Accordingly, the rotating body is consistently located on the axis line due to an automatic alignment effect. Therefore, the rotational angle position of the rotating body can be detected with high accuracy even with occurrence of aging variation such as wearing at a bearing area.01-27-2011
20120235674DETECTING ANGULAR POSITION OF A ROTATING DEVICE - An angular position of a rotating device is detected by sensing and counting high-resolution transitions of high-resolution digital sensors in response to the rotating device rotating; sensing low-resolution transitions of a low-resolution digital sensor in response to the rotating device rotating, the low-resolutions transitions being unevenly spaced apart; determining an angular position of the rotating device in response to determining a number of high-resolution transitions between pairs of low-resolution transitions.09-20-2012
20110025312MAGNETIC ENCODER AND METHOD OF DETECTING ABSOLUTE ROTATIONAL POSITION - A magnetic encoder includes a multi-pole magnetic detecting unit having a multi-pole magnet. In the multi-pole magnetic detecting unit, first and second magnetic detecting elements that output sinusoidal signals having a 90° phase difference are arranged apart from third and fourth magnetic detecting elements at a mechanical angle of 180°. The first and third magnetic detecting elements are disposed at the same position represented by an electrical angle and output sinusoidal signals of a same phase. The second and fourth magnetic detecting elements are arranged at the same position represented by an electrical angle and output sinusoidal signals of a same phase. A sum signal of the output signals of the first and third magnetic detecting elements and that of the output signals of the second and fourth magnetic detecting elements are obtained, thereby eliminating or remarkably reducing error components of detection signals of the first to fourth magnetic detecting elements caused by the magnetic flux of a two-pole magnet and those of the detection signals caused by rotational run out of the multi-pole magnet. A rotational angle can be detected with high accuracy.02-03-2011
20110031965Magnetic Sensor - A magnetic sensor includes a first detection unit and a second detection unit. The first detection unit calculates a first detection angle which is a detected value of a first angle that a direction of an external magnetic field in a first position forms with respect to a first direction. The second detection unit calculates a second detection angle which is a detected value of a second angle that the direction of the external magnetic field in a second position forms with respect to a second direction. The first detection angle includes a first angular error. The second detection angle includes a second angular error. The first angular error and the second angular error differ in phase by an odd number of times ½ of the error period.02-10-2011
20110031964Magnetic sensor for an elevating motor - A magnetic sensor for an elevating motor, and more particularly to a magnetic sensor whose magnetic induction elements are sealed within a magnetically non-permeable minor sleeve. Meanwhile, a signal transmission line is extended therefrom. In addition, the minor sleeve and the magnetic induction elements are disposed within a gear box of the elevating motor. Since the magnetic sensor in accordance with the invention is designed in a built-in type, it is not easily affected and damaged by the external environment. As a result, the service life may be prolonged. Moreover, it is modularized for a compact structure and a practical installation. In addition, it approaches more to the rotational and magnetic pole, thereby enhancing the measuring accuracy.02-10-2011
20110279111Electronic probe housing and electronic governor for steam turbine - An electronic housing having two speed pickup devices automatically sends electric signals to an electronic governor which causes the RPM of the steam turbine to increase, decrease or remain constant, in conjunction with software and electronic circuitry for controlling the management of a plurality of power sources for the electronics and minimizing the amounts of power used in such electronics.11-17-2011
20110279112VARIABLE RELUCTANCE RESOLVER AND METHOD OF PRODUCING THE VARIABLE RELUCTANCE RESOLVER - A variable reluctance resolver includes a rotor that rotates about a rotational axis, a plurality of detection coils that detect rotation of the rotor, and a magnetic member that magnetically connects adjacent ones of the detection coils to each other. The magnetic member includes a pair of body portions around which the detection coils are wound, and a connection portion that connects the pair of body portions to each other. Both the body portions and the connection portion have a thin flat shape. The body portions are flat so that a direction of extension of the flat shape is along a rotational axis direction, and the magnetic member has a U shape as viewed from the rotational axis direction.11-17-2011
20110279110Electronic probe housing for steam turbine - An inner chamber in a housing surrounding a first end of a drive shaft upon which the turbine blades are mounted, a gear ring within the inner chamber fixedly attached to the first end of the drive shaft, the gear ring having a plurality of spaced, ferrite extensions, two magnetic pickup sensors mounted within the inner chamber of the housing in near proximity to the spaced extensions providing indicia of rotating speed as the gear ring revolves with the drive shaft while the magnetic pickup devices remain stationary within the housing, and providing further that during operation, the electronic probe housing automatically sends electric signals to an electronic governor which causes the RPM of the steam turbine to increase, decrease or remain constant.11-17-2011
20090309583Rotation Angle Sensor and Rotation Angle Sensor System - Rotation angle sensor and rotation angle sensor system for determining the angle of rotation of a shaft which can rotate at its shaft end, having a housing, having a shaft mount which is mounted on the housing such that it can rotate, having at least one signal transducer arranged on the shaft mount and having at least one signal receiver which is arranged on the housing and interacts with the signal transducer, wherein the shaft mount is designed in a manner such that the housing is attached only by means of the shaft mount at the shaft end.12-17-2009
20090033320Angle detector - In an angle detector according to the present invention, a magnetic rotor is rotated while being face-to-face between a pair of magnetic stator strips of each of magnetic stator portions provided separately to an annular stator frame, so high-accuracy detection is carried out irrespective of decentering of a rotary shaft.02-05-2009
20100039104WING FLAP SENSOR UNIT - A wing flap sensor unit (02-18-2010
20090206829SIGNAL PROCESSING DEVICE FOR SENSING DEVICE - A signal processing device includes an upper amplitude value estimating portion estimating an upper amplitude value based on a peak value of the detection signal and a predetermined median value of a preset range, a lower amplitude value estimating portion estimating a lower amplitude value based on the median value and a bottom value of the detection signal, an offset adjustment signal generating portion generating an offset adjustment signal for offset-adjusting the detection signal in a case where either one of the upper amplitude value or the lower amplitude value is set as a reference value and the other one of the upper and lower amplitude values becomes greater than a set value, an offset adjustment portion offset-adjusting the detection signal based on the offset adjustment signal, and a binarization portion binarizing an output signal from the offset adjustment portion based on a threshold value estimated from the detection signal.08-20-2009
20090206827ROTATION-ANGLE-DETECTING APPARATUS, ROTATING MACHINE, AND ROTATION-ANGLE-DETECTING METHOD - A rotation-angle-detecting apparatus comprising a magnet rotor having 4 or more magnetic poles on the surface, and sensor device for detecting magnetic flux from the magnet rotor, and an electronic circuit for outputting a signal representing the rotation angle of the magnet rotor using pluralities of signals obtained from the sensor device, the sensor device having pluralities of spin-valve, giant-magnetoresistive devices for outputting two or more different phase signals from a rotating magnetic field near the rotating magnet, each spin-valve, giant-magnetoresistive device having a pinned layer and a free layer, the magnetization direction of the pinned layer being fixed, and the magnetization direction of the free layer rotating depending on a magnetic field direction, pluralities of the spin-valve, giant-magnetoresistive devices comprising a first spin-valve, giant-magnetoresistive device having a reference magnetic-field-sensing direction, and a second spin-valve, giant-magnetoresistive device having a magnetic-field-sensing direction different from that of the first spin-valve, giant-magnetoresistive device.08-20-2009
20120032670Rotational angle sensor and method manufacturing same, and throttle control device with rotational angle sensor - A rotational angle sensor and a method for manufacturing the same, and a throttle control device with a rotational angle sensor, which may lower the cost, are provided. The rotational angle sensor includes each sensor IC for detecting a rotational angle of a rotor based on a magnetic field generated between a pair of magnets respectively disposed across the rotational axis of the rotor; each main terminal connected with each connection terminal of each sensor IC; and a holder member for holding each sensor IC and connection portions of each main terminal on each sensor side. A sensor assembly is constructed to form the sensor ICs the main terminals and the holder member into an assembly. A potting material is potted into the holder member.02-09-2012
20120032669MAGNETIC DEVICE FOR DETERMINATION OF ANGULAR POSITION IN A MULTIPHASE ROTARY ELECTRICAL MACHINE - Disclosed is the selecting of the optimum characteristics of a magnetic device producing a sinusoidal signal for determination of angular position in a rotary machine. The device includes a multi-polar magnetic ring which is mobile in rotation around an axis, and creates a variable magnetic field according to an angle of rotation. In close proximity to the magnetic ring, a magnetic sensor is placed in this magnetic field, and generates the sinusoidal signal. The air gap between the sensor and ring is constituted by spacing the sensor by a distance E from the magnetic ring on a radial plane. Optimum performance is achieved when a first ratio e/E of a thickness e of the multi-polar magnetic ring in a direction which is radial relative to the air gap E is between 0.4 and 2.3. A second ratio h/e of a height h of the ring, in a direction which is axial relative to the thickness e, is between 1.5 and 8.02-09-2012
20110127997ROTATION SENSOR UNIT - The object of the invention is, in a rotation sensor unit comprising a housing in which the outer race of a rolling bearing is fitted, a shaft supported by this rolling bearing, and a magnetic encoder for detecting the rotation of the shaft, to shield the magnetic sensor element from external magnetic field without depending on a dedicated magnetic shield cover or the housing, while preventing displacement of the magnetic sensor unit and the encoder relative to each other.06-02-2011
20110291648DEVICE AND METHOD FOR DETERMINING THE SPEED OF A WHEELED TERRESTRIAL VEHICLE FROM MEASUREMENTS OF A MAGNETIC FIELD - A device for measuring the speed of movement of a wheeled terrestrial vehicle is characterised in that it comprises a magnetometer intended to take measurements of a magnetic field and positioned so as to be sensitive to the magnetic field variations caused by the rotation of at least one partially metallic wheel, as it is, of the vehicle and capable of delivering a corresponding signal, and means for processing said signal that are capable of establishing a frequency spectrum thereof, of determining, from said frequency spectrum, a frequency of rotation of said wheel, and of deducing therefrom, on the basis of information representative of the radius of the wheel, the speed of movement of the vehicle.12-01-2011
20110291647EXTERNAL-COUPLED ELECTRONIC ANGLE MEASUREMENT APPARATUS - The present invention proposes an external-coupled electronic angle measurement apparatus including a housing, a display element, an angle detection system and a coupling portion. The housing is movable through the coupling portion to fasten the external-coupled electronic angle measurement apparatus to a desired location of different hand tools to accurately measure turning angles of a screw driven by the hand tool through the angle detection system and display the result on the display element.12-01-2011
20120098529ROTATION ANGLE DETECTING DEVICE - The present invention aims for providing a rotation angle detecting device which achieves both the reduction of a manufacturing cost and the elimination of the influence of a reverse magnetic field. A rotating magnet 04-26-2012
20090146651ROTATION ANGLE SENSOR - A pair of cylindrical magnets with cut away portions has been arranged on both sides of a magnetic sensing element in symmetry of rotation, and a yoke surrounds the magnetic sensing element in contact with outer peripheral surfaces of the pair of the cylindrical magnets with cut away portions. The pair of the cylindrical magnets with cut away portions rotates around an axial center with a concurrent axial displacement along with a rotation of a rotating body. The pair of the cylindrical magnets with cut away portions is arranged in inclined manner against an axis-of-rotation of the magnet. Thereby, the rotation and the displacement in the direction of the axis against the magnetic sensing element of the pair of the cylindrical magnets with cut away portions, and the number of times of rotation can be detected by detecting the size of the magnetic flux density by the magnetic sensing element. The pair of the cylindrical magnets with cut away portions improves the size and linearity of the magnetic field on the axial center.06-11-2009
20110089935MAGNETIC ENCODER WITH OFFSET ADJUSTMENT FUNCTION - A center voltage of an analog signal from a magnetic sensor is measured to match a reference voltage with the center voltage. Then, a combination of portions to be disconnected of adjustment patterns 04-21-2011
20130214767POSITION DETECTING DEVICE - A position detecting device has an output circuit, which controls voltages of signal lines connecting a power supply and a ground by a power side transistor and a ground side transistor. An output signal line connects a connection point of the signal lines and an output terminal. A first comparator circuit outputs a signal “1” when a current flowing in the line between the power supply and the connection point is larger than a normal current flowing into the ground from the power supply in a normal state. A second comparator circuit outputs a signal “1” when a current flowing in the line between the connection point and the ground is larger than the normal current. When the signal “1” is output from the first comparator circuit or the second comparator circuit, a cutoff circuit turns off a switch disposed in the output signal line.08-22-2013
20100033170ROTARY POSITION ENCODER - A rotary position encoder is described that includes a hub configured to mount on an end of a rotatable shaft of a machine tool and rotate concurrently with the rotatable shaft. The hub includes a cup formed in a first end to receive the rotatable shaft, the cup having equally spaced axial grooves formed on an inner surface. A collar clamps the hub to the rotatable shaft by collapsing the cup around the rotatable shaft. The rotary position encoder further includes a sensor configured to detect a rotational position of the hub and a housing, wherein the sensor is mounted to the housing in a position opposite a second end of the hub. The hub is rotatably coupled to the housing via a bearing and a bracket is attached to the housing for mounting the rotary position encoder to the machine tool and preloading the bearing.02-11-2010
20120187942ENCODER MODULE WITH AN ALIGNMENT SYSTEM - An encoder module with an alignment system with an encoder device, a housing and a movable hub is presented. The encoder module may be integrated with an alignment system to facilitate a built-alignment feature for aligning an encoder device disposed within the encoder module. The encoder module may include a hub that may be movably arranged in the housing and rotatable about a central axis of rotation. The hub may be slidingly moved between a first position configured to set the encoder module to engage in a centering mode and a second position configured to set the encoder module to engage in a rotational mode. The encoder module may be configured to be slidingly disposed on a motor whereby a sleeve of the hub is configured to mate with a shaft of the motor by means of slide fitting.07-26-2012
20100001721Rotation angle sensor - A rotation angle sensor providing excellent output characteristics is provided. The rotation angle sensor has a structure in which a ring-shaped permanent magnet provided so as to be rotatable integrally with a rotor connected to a member to be detected; magnetic flux gathering yokes surrounding the outer circumferential surface of the ring-shaped permanent magnet with a certain clearance being formed between the outer circumferential surface and the magnetic flux gathering yokes; and Hall ICs 01-07-2010
20110169483ROTATION ANGLE DETECTION DEVICE - A rotation angle detection device comprises angle detection means including detection circuits including detection element members consisting of coils and resistances, and inductance changing means for changing inductance of said coils corresponding to rotation of a rotation body to be measured, reference pulse voltage generating means for making said detection circuits generate output signals, and operating means for calculating output signals of said detection circuits, wherein reference pulse voltage generated by said reference pulse voltage means and output voltages of said detection circuits output when said reference pulse voltage is input are compared for calculating rotation angle of said rotation body to be measured.07-14-2011
20090153137Methods and Apparatus for Vibration Detection - Apparatus for detecting vibration of an object adapted to rotate includes one or more vibration processors selected from: a direction-change processor adapted to detect changes in a direction of rotation of the object, a direction-agreement processor adapted to identify a direction of rotation of the object in at least two channels and identify an agreement or disagreement in direction of rotation identified by the at least two channels, a phase-overlap processor adapted to identify overlapping signal regions in signals associated with the rotation of the object, and a running mode processor adapted to identify an unresponsive output signal from at least one of the at least two channels. A method for detecting the vibration of the object includes generating at least one of a direction-change output signal with the direction-change processor, a direction-agreement output signal with the direction-agreement processor, a phase-overlap output signal with the phase-overlap processor, and a running-mode-vibration output signal with the running-mode processor, each indicative of the vibration the object.06-18-2009
20090146650ROTATION ANGLE SENSOR AND SCISSORS GEAR SUITABLE THEREFOR - A driving gear, which is a scissors gear, fixed to a rotating body, engages with a driven gear, and the driven gear engages with a fixed screw receiver. A first gear and a second gear of the driving gear elastically bias the tooth of the driven gear by a coil spring in the direction of an inner side of a diameter; consequently the driven gear 06-11-2009
20090146649Non-contact rotational angle detecting sensor - There is provided a non-contact rotational detecting sensor comprising a ring-shaped permanent magnet which rotates integrally with a detection object of a rotational angle and of which a magnetic pole changes along the circumferential direction, a ring-shaped inside magnetic flux collecting yoke for surrounding an outer peripheral surface of the ring-shaped permanent magnet in a constant gap, a ring-shaped outside magnetic flux collecting yoke for surrounding an outer peripheral surface of the ring-shaped inside magnetic flux collecting yoke in a constant gap, and a hole IC arranged in a gap formed in the ring-shaped inside magnetic flux collecting yoke, wherein an axial height of the ring-shaped inside magnetic flux collecting yoke is changed along a circumferential direction of the ring-shaped inside magnetic flux collecting yoke.06-11-2009
20090146648Rotation Detector - A rotation detector that can be assembled into a hub of a wheel without breakage of an object to be detected. The rotation detector has a housing (06-11-2009
20090309585ROTATION ANGLE DETECTION DEVICE - A rotation angle detection device comprises a rotor (12-17-2009
20100007341ROTATION ANGLE DETECTION DEVICE - A rotation angle detection device for detecting rotation angle of a rotator to be measured includes magnetic detection elements which are fixed to the circumference of the rotating body to be measured and detect magnetic flux density of magnet which is rotated with said rotating body to be measured. The device can calculate rotation angle of the rotating body to be measured from outputs of the magnetic detection elements. The device also includes magnetic bodies having two edge portions in positions where the magnet is inserted and are arranged along an area where a magnetic line of force of the magnet is formed. In this regard, gaps can be provided between one edge portion of the magnetic body in the direction of rotation center axis of the magnet and one side of the magnet in the direction of rotation center axis, and between another edge portion of the magnetic bodies in the direction of rotation center axis of the magnet and another side of the magnet in the direction of rotation center axis in some degree, and the magnetic detection elements are intermediated in a magnetic line of force which passes through the magnetic bodies.01-14-2010
20110062950Measuring Method, Sensor Arrangement and Method for Mounting a Measuring System - In a measurement method, a plurality of magnetic field sensors (MS03-17-2011
20100090690Arrangement for Wheel Rotational Speed Detection With Increased Intrinsic Safety - Disclosed is an arrangement for the intrinsically safe detection of movements of a body, such as a wheel. The arrangement includes a magnetic encoder (04-15-2010
20090206828FAILURE DETECTION APPARATUS FOR RESOLVER - A failure detection apparatus for a resolver outputting a sine signal indicative of sin θ and a cosine signal indicative of cos θ according to a rotational angle θ of a rotator, includes an inspection value calculating section configured to calculate an inspection value based on at least one of the sine signal and the cosine signal; a failure detecting section configured to judge whether the resolver is in a failure state or not on the basis of the inspection value; a counting section configured to gradually increase a count value with a lapse of time when the failure detecting section is determining that the resolver is in the failure state, and configured to gradually decrease the count value with a lapse of time when the failure detecting section is determining that the resolver is not in the failure state; and a failure deciding section configured to finally decide that the resolver has caused the failure on the basis of the count value.08-20-2009
20090243600ROTATION SENSOR UNIT - A rotation sensor unit includes an encoder, a holder radially positioning the encoder, and a rolling bearing having an inner race. The rolling bearing is fitted around the shaft so that one end of the inner diameter surface of the inner race protrudes from the end of the outer diameter surface of the shaft. The holder has a screwed portion fitted in the inner race, positioning the encoder coaxially with the shaft. The holder is non-magnetic, having a retaining portion in which the encoder is axially pressed. The encoder is a plastic magnet, with protrusions and recesses formed integrally on its outer diameter surface and biting the inner diameter surface of the retaining portion to prevent the encoder from rotating. With the holder screwed to the shaft, the encoder is disposed between the magnetism detection element and the one end of the shaft.10-01-2009
20110018528METHOD AND DEVICE FOR DETERMINING THE ACTUATION POSITION OF AN ADJUSTING ELEMENT OF A MOTOR VEHICLE - In order to determine the actuation position of a motor-driven adjusting element of a motor vehicle, a Hall-effect sensor is located in a rotatable magnetic field, wherein a periodic change in the magnetic flux density sensed by the Hall-effect sensor is converted into a binary pulse train in that a pulse transition takes place when an upper switching threshold is positively exceeded and when a lower switching threshold separated from the upper switching threshold by a hysteresis is negatively exceeded. The hysteresis is reduced following an inactive phase of the Hall-effect sensor during which the magnetic field was stationary and/or the Hall-effect sensor was deactivated, if the magnetic flux density at the start of the inactive phase has exceeded the upper switching threshold by no more than a predefined tolerance range.01-27-2011
20110199076STATE DETECTION DEVICE AND METHOD IN PORTABLE DEVICE - A device and method are provided that can detect a state when the relative positions of two cases of a portable device are changed by a form of motion other than simple rotation or shift. In a portable device including a joint mechanism that joins first and second cases in such a manner that the relative positions of the first and second cases can be changed by rotation and shift between a plurality of predetermined positions, the positional state of the first and second cases is determined based upon a plurality of magnets (M08-18-2011
20110199074ROTARY ENCODER AND CONTROL METHOD THEREOF - The control method includes obtaining an assumed angle and an actual angle of each of the plurality of rotation angle detecting members, determining a first rotation angle detecting member, the assumed angle and the actual angle of which differ from each other, determining a second rotation angle detecting member having the actual angle closest to the assumed angle of the first rotation angle detecting member, resetting the given count value of the second rotation angle detecting member to a new count value of the first rotation angle detecting member, changing the actual angle of the first rotation angle detecting member via the new count value of the first rotation angle detecting member to reduce an angular error between the assumed angle and the actual angle of the first rotation angle detecting member.08-18-2011
20100219815Magnetic Rotary Encoder and Method for Iteratively Aligning Magnet Relative to Magnetic Sensors - A sensor system and method of operating such a sensor system for measuring an angle of rotation with an arrangement of at least four magnetic sensors (09-02-2010
20090289622Angle Detector - It is an object of the present invention to obtain an ultrathin angle detector by disposing an annular rotor board face to face with stator windings of a plurality of stators provided on an annular stator board. An angle detector according to the present invention is constructed by providing magnetic cores and the stator windings on the respective stators provided on a surface of the annular stator board via slots, and disposing a corrugated curved surface formed on a board inner surface of the annular rotor board face to face with the stators so as to obtain an angular signal that changes according to a sinusoidal waveform.11-26-2009
20090102467METHOD AND APPARATUS FOR SENSING SHAFT ROTATION - A system or method for sensing rotational parameters of a rotating machine. A rotating element is mounted on a shaft of a rotary machine. The rotating element has predetermined magnetic permeability. An insert is disposed on the first rotating element and characterized by a second magnetic permeability different from that of the rotating element. A sensor is mounted opposite the first rotating element and separated from the rotating element by a gap. The target element has an axis substantially parallel with and offset from the axis of the rotating element. The sensor is disposed in substantial alignment with the target element at least once per rotation when the rotating element is rotating. The sensor is configured to generate an output signal in response to a sensed deviation in a magnetic field induced by the rotation of the target element in proximity to the sensor.04-23-2009
20120293167ROTATION SENSOR - A magnetism detection elements are arranged in an arrangement direction substantially perpendicular to a tooth trace of a gear when viewed from a magnetism generation unit and send a signal according to a magnetic flux flowing between the gear and the magnetism generation unit. A detection unit detects rotation of the gear according to the signal. A case accommodates the magnetism detection elements. A movement restriction unit is equipped to the case and located on the side of the gear at a place between the magnetism detection elements to restrict a magnetic foreign matter, which adheres to the case, from moving in the arrangement direction of the magnetism detection elements.11-22-2012
20110199075ROTATION ANGLE DETECTION DEVICE, AND ROTATION ANGLE DETECTION METHOD - A rotation angle detection device includes: a detection portion that detects detection angle that univocally corresponds to rotation angle of a rotating body which is within a predetermined range, wherein the detection angle linearly increases from a minimum value to a maximum value as the rotation angle increases within a unit range, and the detection angle changes from the maximum value to the minimum value or from the minimum value to the maximum value at a boundary between unit ranges that are adjacent to each other; and a correction portion that corrects the detection angle so that the detection angle detected in the predetermined range has linear characteristics, if the boundary between the unit ranges is contained in the predetermined range.08-18-2011
20100102804Position/displacement measuring system with an encoded scale body - Position/displacement measuring system, comprising a sensor head and an encoded scale body, the scale body extending in a first direction and in a second direction lying transversely to the first direction, and the scale body having a region for incremental position determination with an encoding in the first direction and a region for absolute position determination with an encoding in the second direction, the sensor head having a first sensor device with a sensor resolution parallel to the first direction, which is associated with the region for incremental position determination, and the sensor head having a second sensor device with a sensor resolution in a second direction, which is associated with the region for absolute position determination.04-29-2010
20100102803INDUCTION DETECTING ROTARY ENCODER - An induction detecting rotary encoder has first to third transmitting windings, first to third receiving windings, and first to third flux coupling winding. The first transmitting winding, the first receiving winding, and the first flux coupling body constitute a first angle detection track generating a cyclic change for N04-29-2010
20080246467Device For Counting the Rotations of an Object in a Referential, and Method For Controlling One Such Device - A device for counting rotations of an object in a referential, in which a magnetic sensor linked to the object measures a field associated with the referential in order to generate measuring signals at the rotational frequency of the object. The sensor also functions as an antenna for receiving an electromagnetic wave. A method for controlling a counting device includes receiving measurement signals and a radio-frequency triggering signal from a sensor and sending information representative of the numbering cycles in the measurement signals.10-09-2008
20110267045Method and Apparatus for Sectional Magnetic Encoding of a Shaft and For Measuring Rotational Angle, Rotational Speed and Torque - Magnetically encoded shafts for use in detecting forces exerted on the shaft during operation. Magnetically encoded regions arranged in tracks or bands, encircle the shaft and are formed within or affixed to the shaft. The magnetically encoded regions define force-sensitive regions therebetween. Magnetic fields surround the force-sensitive regions and are altered by force vectors passing through the force sensitive region. These magnetic fields are sensed by magnetic field sensors to determine various shaft parameters including, for example: shaft rotational speed, shaft rotational position, and forces exerted on the shaft, e.g., torque, bending forces, stress forces and strain forces. To provide continuous detection of shaft operational parameters and forces, dead zones between magnetically encoded regions are aligned with force sensitive regions associated with magnetically encoded regions in other bands.11-03-2011
20100289485SYSTEM INCLUDING A MAGNET AND FIRST AND SECOND CONCENTRATORS - A system including a first concentrator, a second concentrator, and a magnet. The first concentrator has a first partial hub. The second concentrator has a second partial hub aligned with the first partial hub to form a bore. The magnet is situated in the bore and the first concentrator and the second concentrator guide magnetic flux from the magnet to sense movement of the magnet relative to the first concentrator and the second concentrator.11-18-2010
20090167296RESOLVER APPARATUS AND ANGLE DETECTION DEVICE AND METHOD OF RESOLVER - A resolver apparatus having a high detection precision detecting angle signals from signals detected at a resolver (07-02-2009
20090309584Rotary velocity sensor and rotary position and velocity sensor - A rotary velocity sensor includes a stator having a coil and a rotor having a permanent magnet. The rotor is substantially coaxially aligned with the central longitudinal axis of the stator, surrounds the coil, and is rotatable with respect to the stator about the axis. A rotary position and velocity sensor includes a non-magnetic stator having a magnetosensitive device and having at least one coil and includes a non-magnetic rotor having at least one permanent magnet. The magnetosensitive device has a sensing surface with a normal axis aligned substantially perpendicular to the stator axis. The at-least-one coil has a central coil axis aligned substantially perpendicular to the stator axis. The rotor is substantially coaxially aligned with the central longitudinal axis of the stator, surrounds the at-least-one coil, and is rotatable with respect to the stator about the stator axis.12-17-2009
20080290862Irregular Saturated Pole Position Sensor - According to the invention, the position sensor is characterized in that the correction means (11-27-2008
20120032671METHOD TO DETERMINE PRESENCE OF ROTATOR AND METHOD TO ADJUST OPTIMAL GAIN - A rotation driving system and a method to determine the presence of a rotator on a turntable are provided. The rotation driving system includes an encoder to detect rotation information of a motor, and a controller to determine whether or not a rotator is present on a turntable and also, to adjust a gain of the motor according to moment of inertia of the rotator.02-09-2012
20080278150ROTATION ANGLE DETECTOR - A rotation angle detector id arranged to detect a rotation angle of an object. The rotation angle detector includes a rotor rotating about a rotation axis according to a rotation of the object, a detecting unit for detecting a rotation of the rotor, a controller for detecting a rotation angle of the rotor based on a detection signal output from the detecting unit, and a case for accommodating the rotor rotatably. The case has at least three elongate holes provided therein. The elongated holes have longitudinal directions extending radially from the rotation axis of the rotor. This rotation angle detector detects the rotation angle of the object reliably with a simple structure.11-13-2008
20080204007Rotation detecting sensor - A wheel speed sensor includes a hall IC that outputs a signal representing a change of magnetic field generated by rotation of a detection object and that is simply covered with resin coating. In the process of molding the resin coating, a resin injection opening is positioned away from an end face of a sheath of a cable to be coated by a length no less than a minimum adhesion length for ensuring adhesion between the sheath and the resin coating. In addition, the holder and a cover of the detector are provided with waterproof protrusions extending along the entire peripheries of contact areas in which pressing pins are brought into contact with the holder and the cover. Accordingly, immersion of the detector is reliably prevented even when a void or the like occurs in the resin coating at a position near the injection opening.08-28-2008
20080265877Angle detecting apparatus - An angle detection apparatus includes a rotation member including at least one north magnetic polar region and at least one south magnetic polar region alternately arranged around a rotation center, a magnetic field detecting portion having a magnetic plate and detecting elements detecting magnitudes of magnetic components in a direction perpendicular to the magnetic plate, and a computing unit determining a rotation angle of the rotation member, wherein the magnetic field detecting portion is disposed so that the magnetic plate is oriented perpendicular to a first direction, where magnetic field intensity is at its maximum, and the magnetic field detecting portion detects the magnitudes of the magnetic components in the first direction and a second direction corresponding to a direction that the north and south magnetic polar regions are circumferentially arranged.10-30-2008
20100201354METHOD AND APPARATUS FOR MONITORING ROTARY MACHINES - A method of determining the amount of travel of a rotating component that includes a rotor shaft includes providing a self-contained magnetically-powered encoder. The encoder includes an encoder rotor that extends outward from a sealed housing such that a clearance gap is defined between the rotor and housing. The encoder also includes at least one sensor configured to activate via magnetic flux and is configured to dissipate electrical signals with a power amplitude less than approximately one microwatt. The method also includes rotatably coupling the encoder to the rotor shaft. The method further includes measuring a first position of the encoder rotor and determining a first linear position measurement of the rotor shaft based on the encoder rotor. The method also includes rotating the rotor shaft to a second position and determining a direction of rotation and a second linear position measurement of the rotor shaft using the encoder.08-12-2010
20090009160Magnetic Sensor with High and Low Resolution Tracks - A sensing apparatus that includes first and second magnet assemblies. The first magnet assembly includes first and second magnets that have respective first and second opposite magnetic fields, and respective first and second dimensions. The first dimension is relatively smaller than the second dimension. The second magnet assembly is positioned at a distance from the first magnet assembly. The second magnet assembly includes a third magnet that has a third magnetic field which is opposite to the first magnetic field.01-08-2009
20110006760BOTTOM BRACKET WITH A TORQUE SENSOR - A bottom bracket with a torque sensor unit. The bottom bracket has at least one pedal crank, a shaft that is non-rotatably connected to the at least one pedal crank, and a torque detection device for detecting a torque in the region of the shaft. The torque detection device has a first magnetization and a sensor which detects a change of the first magnetized due to a torque passed into the shaft. The bottom bracket allows a reliable and fast detection of torques, especially of the different torques of both pedal cranks. Utilizing the shaft, which is designed as a hollow shaft and the first magnetization, which is arranged on at least one section of the shaft.01-13-2011
20120105055ROTATION ANGLE DETECTOR FOR AUTOMOTIVE DRIVE MOTOR AND BEARING ASSEMBLY EQUIPPED WITH THE SAME - Provided is a rotation angle detection device for an automotive vehicle drive motor. The device includes a magnetic encoder including magnetic tracks with different numbers of magnetic poles. The magnetic tracks form coaxial rings. The device also includes magnetic sensors operable to sense the magnetic fields of the magnetic tracks. The magnetic sensors obtain information on a location within a magnetic pole of the magnetic tracks and generate magnetic field signals indicative of respective phases. The device further includes a phase difference determination unit that determines a difference between the respective phases of the magnetic field signals, an angle computation unit that computes an absolute angle of the magnetic encoder, based on the determined difference, and a signal output unit that outputs the computed absolute angle. The magnetic encoder is associated with an output shaft of the drive motor or with a bearing assembly equipped to the drive motor.05-03-2012
20110204883SWING TYPE INPUT APPARATUS - A swing type input apparatus includes a housing, an operation knob rotatably supported by the housing, and a detecting unit detecting an angle of rotation of the knob. The detecting unit includes a circuit substrate intersecting the rotation center line of the knob, a magnetic sensor on an extension of the circuit substrate, a magnet holder driven by and rotated with the knob, a magnet held by the magnet holder such that the magnet intersects the rotation center line and is close to and faces the magnetic sensor, and a magnetic shield case which covers the magnet and the magnetic sensor and is a boxy assembly of first and second shield cases. The boundary between the first and second shield cases is positioned so as not to overlap the magnet. A bent grounding tab in the second shield case is electrically connected to a grounding conductor of a sub substrate.08-25-2011
20090115408METHOD AND APPARATUS TO MONITOR POSITION OF A ROTATABLE SHAFT - A rotatable shaft is equipped with a measurement device that generates output signals corresponding to discrete angular positions of the shaft. Rotational angles of the shaft are measured for a complete rotational period. A true angular velocity of the shaft is determined. Angular velocity is calculated between contiguous pairs of the discrete angular positions. A velocity correction is determined, and a rotational angle error term is determined based upon the velocity correction.05-07-2009
20120068695SUPPORT MEMBER, ROTATION DEVICE COMPRISING SUCH A SUPPORT AND ROLLING BEARING ASSEMBLY INCLUDING A DETECTION DEVICE - This support member (03-22-2012
20120068694METHOD OF DETECTING ABSOLUTE ROTATIONAL POSITION - Before detecting a mechanical angular absolute position θabs of a rotating shaft (03-22-2012
20090140731Multiple-Rotation Absolute-Value Encoder of Geared Motor - A multiple-rotation absolute-value encoder of a geared motor, wherein the geared motor (06-04-2009
20090015247ROTATION ANGLE DETECTING UNIT - A rotation angle detecting unit includes a pedal arm rotated by the pedal force transmitted from an accelerator pedal, an urging device urging the pedal arm in an opposite direction from a direction, in which pedal force is applied to the pedal arm, a pedal rotor engaging the pedal arm to transmit urging force of the urging device to the pedal arm, and a rotation angle detecting device detecting the rotation angle of the accelerator pedal. The rotation angle detecting device includes a movable part attached to the pedal rotor and thereby displaced together with the pedal rotor, and a stator that outputs an electric signal, which is associated with a rotational position of the pedal rotor due to one of magnetic and electric interactions with the movable part.01-15-2009
20110227562ROTARY ENCODER - A guide detection type rotary encoder has first through fourth transmission windings, first through fourth reception windings, and first through fourth flux coupling bodies. The first and second transmission windings, the first and second reception windings, and first and second flux coupling bodies each form first and second angle detection tracks which generate an N09-22-2011
20110140689SIGNAL AMPLITUDE ADJUSTMENT TO IMPROVE RESOLVER-TO-DIGITAL CONVERTER PERFORMANCE - An interface system between an RDC and a connected resolver dynamically matches an input range of the RDC to the output range of the resolver's output signals. The interface system may include methods and/or apparatuses to determine the amplitude of sinusoidal input signals presented to the RDC by the resolver and to compare the amplitude against high and low threshold values. A gain control signal may be generated, which may be corrected if the detected amplitude either exceeds the high threshold or falls below the low threshold. The gain control signal may be output to a circuit in the RDC or in the resolver that corrects any mismatch that occurs between the RDC input and the resolver output. For example, the gain control signal may control the amplitude of an excitation signal applied to a primary of the resolver or the gain control signal may be applied to an analog to digital converter at the input of the RDC to control its effective input range.06-16-2011
20090179632Magnetic Resolver - A magnetic resolver includes: a plurality of columnar cores disposed on an annular plate; a coil portion disposed around each of the columnar cores; and an annular rotor having a sinusoidal profile that rotates in a plane parallel to the top faces of the columnar cores around a rotation axis that passes through the center of the annular plate. The coil portion may be formed of a patterned coil formed on an annular substrate that has a plurality of through holes made therein through which the plurality of cores are passed, the patterned coil being formed around the through hole.07-16-2009
20110227563MAGNETIC TYPE ROTATION DETECTION DEVICE AND ITS MANUFACTURING METHOD - A magnetic type rotation detection device may include a magnet body formed with a magnetic pole pair comprised of an “S”-pole and an “N”-pole and provided on a rotation body, a magnetic sensing element facing the magnet body in a rotation center axial line direction of the rotation body, a partition member disposed between the magnet body and the magnetic sensing element, and a ring fixed to a face of the partition member on a side where the magnet body is located. A center of the magnetic sensing element may be located on a center axial line of the ring. The magnet body may be disposed on an inner side of the ring in a non-contact state with the ring. A center of the magnet body may be located on the center axial line of the ring.09-22-2011
20090174397INTERNAL INSTRUMENTATION SYSTEM FOR A NUCLEAR REACTOR, THE SYSTEM HAVING AN ADVANCED ELECTRONIC CARD, AND A CORRESPONDING METHOD OF MODIFYING AN INTERNAL INSTRUMENTATION SYSTEM OF A NUCLEAR REACTOR - This internal instrumentation system (07-09-2009
20090160436Reference signal generation circuit, angle converter, and angle detection apparatus - A reference signal generation circuit generates a reference signal used in synchronous detection for removing an excitation signal component in an angle calculation section that converts a detection angle θ obtained from two-phase resolver detection signals output from a resolver, to a digital output angle φ. The reference signal generation circuit includes a first multiplier, a second multiplier, and an adder. The first multiplier multiplies one of the resolver detection signals sin θ sin(ωt+Δω) by the sine value sin φ of the digital output angle φ obtained from the angle calculation section. The second multiplier multiplies the other resolver detection signal cos θ sin(ωt+Δω) by the cosine value cos φ of the digital output angle φ obtained from the angle calculation section. The adder adds the output of the first multiplier and the output of the second multiplier to output the sum signal sin(ωt+Δω) as the reference signal.06-25-2009
20090201014TWIST-GRIP CONTROL DEVICE, IN PARTICULAR FOR MOTOR VEHICLES - The device (08-13-2009
20090001971MAGNETIC STRUCTURE FOR DETECTING A RELATIVE MOTION BETWEEN THE MAGNETIC STRUCTURE AND A MAGNETIC FIELD SENSOR - A magnetic structure for detecting a relative motion between the magnetic structure and a magnetic field sensor comprises at least two permanent magnets. The permanent magnets are arranged along a predetermined line which for example is a straight or circular line at a predetermined distance g from each other. The permanent magnets are magnetized in the direction of the line, adjacent permanent magnets having an opposite direction of magnetization.01-01-2009
20090021247Device for determining the angular position of a rotatable compressor stator blade - The invention refers to a device for determining the angular position of a compressor stator blade, which is rotatable around its longitudinal axis and arranged in a compressor, with which is associated a measuring surface which rotates synchronously with it. For a reliable, simple and approximately error-free recording of the angular positions, the angular position of the compressor stator blade can be determined via the device in an automated manner. For this purpose, it has at least one mounting unit provided for aligned fastening of the device on the compressor, and at least one measuring and evaluating unit which comprises at least two distance sensors which each record a distance to the measuring surface which is rotatable from the reference position, as a result the angular position of the measuring surface, relative to the reference position depends upon the two recorded distances, is determined by the measuring and evaluating unit.01-22-2009
20090021246ROTATION ANGLE DETECTION DEVICE AND ROTATION ANGLE CORRECTION METHOD - A device for detecting an absolute rotation angle of multiple rotation with a high accuracy and high resolution by using a target connected to the rotation axis and having an outer circumferential surface to which magnetic poles of alternate polarities are magnetized. The device includes: a first rotor holding a target connected to an input axis and having an outer circumferential surface to which magnetic poles of alternate polarities are magnetized at an identical interval and having a multi-rotatable gear; a second rotor connected to the gear of the first rotor, rotated at a low speed by the first rotor, and having a magnet at the center portion; a first detection unit and a second detection unit for detecting the rotation angles of them. With a simple configuration, it is possible to detect an absolution rotation angle with a high accuracy and a high resolution.01-22-2009
20090102469Methods and Apparatus for Vibration Detection - Apparatus for detecting vibration of an object adapted to rotate includes one or more vibration processors selected from: a direction-change processor adapted to detect changes in a direction of rotation of the object, a direction-agreement processor adapted to identify a direction of rotation of the object in at least two channels and identify an agreement or disagreement in direction of rotation identified by the at least two channels, a phase-overlap processor adapted to identify overlapping signal regions in signals associated with the rotation of the object, and a running mode processor adapted to identify an unresponsive output signal from at least one of the at least two channels. A method for detecting the vibration of the object includes generating at least one of a direction-change output signal with the direction-change processor, a direction-agreement output signal with the direction-agreement processor, a phase-overlap output signal with the phase-overlap processor, and a running-mode-vibration output signal with the running-mode processor, each indicative of the vibration the object.04-23-2009
20090102468Rotation sensor and bearing assembly using the same - A rotation sensor includes a magnetic sensor array (04-23-2009
20090256556MEASURING ARRANGEMENT FOR DETECTING A 1/ROTARY MOMENTUM OF AN ENGINE ROTOR, AND ASSOCIATED METHOD - A measurement system for detecting a rotary movement of a rotor that is situated in particular in rotatable fashion in a compressor housing of a jet engine, includes the rotor having vane elements that are preferably situated equidistant from one another on its periphery, and in addition at least one sensor being provided, and at least one material measure being fashioned on the rotor that can be periodically detected by the sensor due to the rotational movement, the material measure is forned by at least one modified vane element that is truncated in the area of the vane tip, the sensor outputting an identical measurement signal in each case when the vane elements travel past, and outputting a modified measurement signal when the modified vane element travels past.10-15-2009
20100148764ROTATION ANGLE DETECTOR - A rotation angle detector for detecting the rotation angle of a rotator to be measured which detects the flux density, generated depending on rotation of the rotator to be measured, of a ring-like magnet fixed to the rotator by means of a magnetic detection element. Since a soft magnetic member is interposed between the ring-like magnet and the rotator, rotation angle of the rotator can be measured accurately without being affected by the material or diameter of the rotator or the fixing state of the rotation angle detector to the rotator. Consequently, a rotation angle detector for detecting the rotation angle of a rotator to be measured accurately without being affected by the material or diameter of the rotator or the fixing state of the rotation angle detector to the rotator is presented.06-17-2010
20100156402POSITION ENCODER AND A METHOD FOR DETECTING THE POSITION OF A MOVABLE PART OF A MACHINE - A rotation angle detection sensor system for a rotational body is provided, which has a reduced sensitivity against an interfering magnetic field and an interfering electric field. The rotation angle detection sensor system comprises an encoder structure that is attached to the rotational body of a machine and is movable along with this rotational body. A stationary sensor assembly is positioned opposite to this encoder structure and supplies at least one sensor signal for determining the angle position. The sensor assembly includes a first inductive element, the inductance of which is dependent on the angle position of the encoder structure.06-24-2010
20090315544Rotation detection device and rotation detector equipped bearing assembly - There is provided a rotation detection device 12-24-2009
20100148763MINIMIZING MAGNETIC INTERFERENCE IN A VARIABLE RELUCTANCE RESOLVER - A resolver apparatus and method are provided. The apparatus comprises a source generation unit for generating a uni-phase source signal to excite a resolver, wherein said source generation unit comprises a low distortion oscillator, a variable phase shifter, and a capacitive resolver driving network; and a signal output unit for generating a two-phase output signal, wherein said signal output unit comprises the resolver, a signal detector and level adjuster, an angular position measurement unit, and an angular position compensation unit. The method comprises generating a source signal to excite a resolver; transmitting the source signal through a variable phase shifter; transmitting the source signal through at least one capacitive passive element serially connected to each coil winding of the resolver; outputting a displacement signal generated by the resolver to a resolver-to-digital converter; and converting said displacement signal into a digital position using the resolver-to-digital converter.06-17-2010
20100176803ANGLE SENSOR WITH FLUX GUIDES, ROTATABLE MAGNET AND MAGNETIC SENSOR - An angle sensor includes first and second flux guides situated in a spaced relationship to define first and second flux guide air gaps therebetween. The first and second flux guides define a central opening, with a magnet situated in the central opening. The magnet is diametrically magnetized and is rotatable relative to the flux guides. A magnetic sensor situated in one of the flux guide air gaps, and is configured to output signals in response to received magnetic flux density.07-15-2010
20100194385NON-CONTACT MULTI-TURN ABSOLUTE POSITION MAGNETIC SENSOR COMPRISING A THROUGH-SHAFT - The invention relates to an absolute position magnetic sensor for measuring the angular position, on a theta course, of a shaft passing through said sensor and comprising at least two systems for detecting the position of the shaft. Said invention is characterised in that: at least one of the detection systems generates a signal according to a “periodical” function of the theta/n period giving the periodical angular position of said shaft; at least one of the detection systems generates an absolute signal on a theta course of the shaft; and theta and n fit the equation: *theta/n=360*n>1.08-05-2010
20100156401MAGNETIC RESOLVER AND METHOD OF MANUFACTURING THE SAME - A magnetic resolver that includes: an annular stator portion having a protruding core; an annular coil substrate on which a coil portion, which is disposed around the protruding core, is formed as a patterned thin-film coil; and a rotor portion disposed to face the stator portion from above, with the coil substrate interposed therebetween, wherein the amount of overlap between a top face of the protruding core and the rotor portion, when viewed from above, varies as a rotation angle of the rotor portion relative to the stator portion varies. The annular coil substrate may be constituted of substrate pieces that have shapes obtained by dividing the annular shape, which facilitates increasing the yield rate in the number of substrate pieces that can be produced from a substrate material.06-24-2010
20100176804ANGLE SENSOR - An angle sensor includes a ring magnet adapted to be attached to a rotatable shaft. The ring magnet has an axis of rotation and an inner radius and an outer radius extending from the axis of rotation to define an annulus. A first magnetic sensor is situated proximate the ring magnet to measure magnetic field lines within the annulus, and a second magnetic sensor is situated proximate the ring magnet to measure magnetic field lines outside the annulus.07-15-2010
20090115409MAGNETIC ENCODER - A high-precision magnet encoder in which high-order harmonic components can be suppressed without increasing the number of lead wires connecting magnetic field detecting elements to a signal processing circuit. Hall sensors of phase A05-07-2009
20100156400MAGNETIC SENSOR DEVICE, MAGNETIC ENCODER DEVICE AND MAGNETIC SCALE MANUFACTURING METHOD - A magnetic sensor device may include “A”-phase magnetic resistance pattern and “B”-phase magnetic resistance pattern which are provided with a phase difference of 90° from each other; wherein the “A” pattern is provided with “+a” phase magnetic resistance pattern and “−a” phase magnetic resistance pattern with a phase difference of 180° from each other for detecting movement of a magnetic scale, and the “B” pattern is provided with “+b” phase magnetic resistance pattern and “−b” phase magnetic resistance pattern with a phase difference of 180° from each other for detecting movement of the magnetic scale, and the “+a” pattern, the “−a” pattern, the “+b” pattern and the “−b” pattern are formed on a same face of one piece of board so that the “+a” pattern and the “−a” pattern are diagonally located and the “+b” pattern and the “−b” pattern are diagonally located.06-24-2010
20100176802PORTABLE ELECTRONIC DEVICE HAVING A ROTARY UNIT - The present invention relates to a portable electronic device comprising: —a housing; —a rotary unit, which can be rotated relative to the housing, and —detection means for detecting a rotational position of the rotary unit. Said detection means comprises: —a magnetic transmitter (07-15-2010
20100225307Rotational Angle Detector And Rotational Angle Detector Incorporated Bearing Assembly - To provide a rotational angle detecting device for securing accurate information on the rotational angle without time lag and a detector incorporated bearing assembly having the rotational angle detecting device, a magnet having an anisotropy in a circumferential direction about the rotation axis is mounted on a rotating member and a magnetic sensor having magnetic sensor elements is arranged on a stationary member so as to confront the magnet. An angle calculating unit for measuring an intensity of magnetic field of the magnet from an output of the magnetic sensor elements and for detecting the rotation angle of the rotating member based on the measured value, and a delay time correcting unit for correcting a delay time between detection of the magnetic field of the magnet by the magnetic sensor elements and output of a detected angle from the angle calculating unit are employed.09-09-2010
20100225309ROTATION DETECTING DEVICE AND BEARING ASSEMBLY EQUIPPED WITH SUCH ROTATION DETECTING DEVICE - A rotation detecting device includes a plurality of magnetic encoders disposed coaxially and having respective numbers of magnetic poles different from each other and a plurality of magnetic sensors for detecting respective magnetic fields emanating from those magnetic encoders. Each of the magnetic sensors is in a ring form and obtains the position information within the magnetic poles of the associated magnetic encoder. A phase difference detector determines the difference in phase between magnetic field signals detected respectively by the magnetic sensors. An angle calculator is provided, which is operable on the basis of the difference in phase so detected to calculate an absolute angle of each of the magnetic encoders. A corrector corrects the initial phase difference occurring in the magnetic field signals, detected respectively by the magnetic sensors, as a result of the fitting position of the magnetic encoders.09-09-2010
20100277162INDUCTIVE DISPLACEMENT OR ROTATIONAL ANGLE SENSOR WITH A SCREENING PLATE ARRANGED BETWEEN TWO COILS - An inductive displacement or rotational angle sensor including at least one electrical coil which is provided with turns, and an influencing element which interacts with said coil and produces a different inductance of the least one coil as a function of its position, characterized in that at least two separate coils which are arranged coaxially with respect to a coil axis and have an axial interspacing are provided, it being possible for the influencing element to enter said interspacing with a degree of overlap, which is dependent on its position, with the magnetic fields which are generated by the coils.11-04-2010
20100225308Signal processing circuit of rotation detector and rotation angle detector - A signal processing circuit for a rotation detector includes a rotational direction determining portion, an effective edge determining portion, a normal-rotation pulse request holding portion, a reverse-rotation pulse request holding portion, an output request signal outputting portion, a pulse outputting portion, a first resetting portion, and a second resetting portion. When one of the holding portions holds an output request signal, the pulse outputting portion outputs a pulse based on the output request signal. When the other one of the holding portions holds an output request signal and then a condition for holding the output request signal that is already held by the one of the holding portions is satisfied in a state where the one of the holding portions holds the output request signal, the second resetting portion resets the output request signal held by the other one of the holding portion.09-09-2010
20120194178ROTOR FOR ROTATION SENSOR - A rotor for a rotation sensor may be mounted on a bearing that supports a wheel on an automotive vehicle so that it can detect the number of revolutions for the wheel. The rotor for a rotation sensor 08-02-2012
20110109304ROTATION ANGLE SENSOR - A rotation angle sensor comprises: a resolver stator including an excitation coil for receiving an excitation signal and a detection coil (a sine wave coil and a cosine wave coil) for outputting a detection signal; and a resolver rotor rotatably placed to face the stator. The resolver stator is formed on a stator flat plate. The resolver rotor is made of a flat-shaped rotor flat plate. The stator flat plate and the rotor flat plate are placed in parallel to face each other. The rotor flat plate is formed with a cutout.05-12-2011
20100253327APPARATUS AND METHOD FOR MEASURING DISPLACEMENTS OF DISPLACEABLE MEMBERS - Apparatus and method for measuring displacements of a rotary or linearly-displaceable member by counting periods of displacement thereof along a predetermined displacement path, including a pulse generator located at a pulse-generation station proximate to the displacement path; and an electrical circuit controlled by the pulse generator to actuate a first sensor to sense the status of the displaceable member at the particular instant one of said second machine-sensible elements passes through the pulse-generation station, and to increment a counter in accordance with said status determination. In the described preferred embodiments, the second machine-sensible elements are magnetic elements; and the pulse generator includes a coil, a magnetic core magnetically coupled to the coil, and a spring-mounting for the magnetic core causing the core to move from an initial position in one direction with respect to the coil when aligned with one of the second machine-sensible elements, and to be returned in the opposite direction by the spring to its initial position, whereby the coil generates pulses during such movements of the magnetic core.10-07-2010
20110057648MAGNETIC RESOLVER - A magnetic resolver includes a stator core made of magnetic material, coils, and a rotor. The stator core has a base plate and protrusions formed integrally with the base plate so as to protrude from a surface of the base plate in the thickness direction. The coils are provided around the respective protrusions. The rotor is disposed so as to face the surface of the base plate with the coils interposed therebetween. The overlapping area between the rotor and each of the protrusions changes with a change in a rotation angle of the rotor relative to the stator core. The stator core has through-holes that pass through the base plate and the respective protrusions in the thickness direction.03-10-2011
20090289623ROTARY ANGLE DETECTING DEVICE - A rotary angle detecting device is provided which includes: a main driving gear configured to rotate while being directly or indirectly connected to a detection target rotating about a predetermined axis; a driven gear configured to rotate while meshing with the main driving gear; a magnet provided at the center of the driven gear; a magnetic detection element configured to detect a variation in magnetic field in accordance with a rotation of the magnet; a circuit board having the magnetic detection element; and the circuit board is separated from the gears by a holder member.11-26-2009
20100201353SENSOR ARRANGEMENT FOR A SHAFT THAT IS MOUNTED IN A MAGNETIC BEARING - A sensor arrangement for a shaft that is mounted in a magnetic bearing. The arrangement has magnetic shielding which shields the magnetic bearing by forming a magnetically shielded area, magnetic encoding that is situated on the shaft in the magnetically shielded area and at least one receiver that detects at least one alteration of the magnetic field of the magnetic encoding. The aforementioned sensor arrangement for a shaft that is mounted in a magnetic bearing permits the an arrangement of this type that uses magnetic encoding of the shaft to detect the position of said the shaft in the closest proximity possible to the magnetic bearing.08-12-2010
20100295542ROTATION PATH DETECTION DEVICE - The invention relates to a rotation path detection device for vehicles of public transportation having a drive device (11-25-2010
20090072819Rotation Angle Detector and Bearing with Rotation Angle Detector - To provide a rotation angle detecting device, in which undesirable noises from an angle calculating circuit can be reduced to increase a detection accuracy, outputs of four linear magnetic sensor arrays arranged on a non-rotatable member confronting a magnetic generating element and arranged in a plane perpendicular to the axis of rotation, the sensor arrays being arranged along four sides of an imaginary rectangular shape, are read out by signal read-out circuits, and then converted into digital signals by AD converting circuits in order to calculate an angle of rotation of the magnetic generating element by an angle calculating circuit. The signal read-out circuits and the AD converter circuits are arranged outside of the magnetic sensor arrays arranged in a generally rectangular pattern, and the angle calculating circuit is arranged inside of the magnetic sensor arrays, all being mounted on a semiconductor chip.03-19-2009
20080284421ROTATION ANGLE DETECTING DEVICE - A rotation angle detecting device includes a signal generator, a magnetic rotor and a rotation angle calculating unit that calculates a rotation angle θ of the rotor based on the output signals of the signal generator. The signal generator includes a magnetic rotor that has a permanent magnet and a shaft connectable with the rotating object and at least three magnetic sensor elements disposed in the magnetic field to generate a plurality of output signals when the rotor rotates. The rotation angle calculating unit calculates a first candidate of the rotation angle θ from a first pair of the three output signals, examines whether the first candidate of the rotation angle θ is normal or not and calculates a next candidate of the rotation angle θ from another pair of the three output signals if the first candidate of the rotation angle θ is not normal, examines whether the next candidate of the rotation angle θ is normal or not, repeats the above two steps until a next candidate of the rotation angle θ is judged normal, and outputs one of the first and next candidates of the rotation angle θ as a formal rotation angle if it is judged normal.11-20-2008
20080231267Liquid level detecting device - A liquid level detecting device includes a rotative member having a bearing portion and a stationary member having an axis portion. The axis portion is fitted to a hole of the bearing portion, thereby rotatably holding the rotative member. The rotative member is integrated with a displacement member. The stationary member is fixed with a detection unit to detect a displacement of the displacement member. The rotative member is connected with a float via an arm. The axis portion has an inserted portion inserted in the bearing portion and in contact with the bearing portion via a contact portion. The contact portion has a total area that is less than an area of an outer circumferential periphery of the inserted portion.09-25-2008
20100308808ROTATION ANGLE DETECTING SENSOR - The present invention is made to provide a rotation angle detecting sensor capable of being miniaturized.12-09-2010
20100301842MAGNETIC REVOLUTION COUNTER - A magnetic revolution counter for the unambiguous determination of a definable number of revolutions of a rotating element to be determined. The aim of creating such a revolution counter allowing a determination of any arbitrarily definable number of revolutions, for example up to values of N>4000 or more as defined, and enabling a cost-effective and small design, is achieved in that a plurality of sensor elements (12-02-2010
20100301843POSITION ENCODER COMPRISING A PLASTIC ELEMENT - Disclosed is a position sensor, in particular a rotor position sensor, comprising a base. A track that is provided with a conducting coating is formed within the surface of the base relevant for evaluating signals. Since the track is formed within the base, the desired position-dependent modulation of the eddy current behavior is obtained by design measures, resulting in low manufacturing tolerance and reduced production costs.12-02-2010
20100301847Wheel bearing device with rotation detector - A wheel support bearing assembly for supporting a wheel, which assembly includes an outer member having rolling surfaces and serving as a stationary member; an inner member having rolling surfaces; a plurality of rows of rolling elements interposed between the respective rolling surfaces; a magnetic encoder fitted to the outer peripheral surface of the inner member at a location adjacent one end thereof; an annular sensor holder made of resin and fitted to the outer member through a core metal, the annular sensor holder having a built-in magnetic sensor with an axial gap intervening between it and the magnetic encoder; and a sealing unit arranged on an outer side axially outwardly of the encoder and the sensor for sealing a space between the sensor holder and the inner member. The magnetic encoder includes a plastic magnetic encoder having a plastic magnet defining a to-be-detected portion.12-02-2010
20100301846MAGNETIC SPEED SENSOR AND METHOD OF MAKING THE SAME - An speed sensor for a rotating shaft includes a plurality of magnetic portions on the shaft that output a magnetic field from each of the magnetic portions, wherein the magnetic portions are integrally formed in the shaft by magnetically polarizing the shaft material itself. At least one magnetic field sensor is positioned proximate to the shaft for detecting the magnetic field from each of the magnetic portions and for outputting a signal corresponding to the angular speed of the shaft as the shaft rotates. The signal is useful for calculating the angular speed of the shaft, and the calculated angular speed value is useful for things like adjusting the angular speed of the shaft, monitoring the performance of the system in which the shaft is used, and for other purposes.12-02-2010
20110241659DEVICE FOR DETECTING A ROTATIONAL ANGLE OF A ROTATABLE PART - A device for detecting a rotational angle of a rotatable part, e.g., a steering wheel, includes at least one magnet, at least one sensor which detects the magnetic field of the magnet, at least one housing in which the sensor and/or the magnet is/are movably situated relative to one another, and at least one printed circuit board which is contacted in an electrically conductive manner by at least one connecting element of the sensor. The printed circuit board has at least one interface or a connector plug from which the output signal of the sensor or an output signal derived therefrom is relayed to an evaluation unit which ascertains the absolute position of the rotational angle as a function of the output signal.10-06-2011
20110001471SELF-ADJUSTING MULTI-EVENT TIMING APPARATUS - An apparatus for providing an indication of rotational position of a shaft by parameter change. The apparatus includes a resilient, serpentine-shaped middle portion, a first end portion located at one end of the middle portion, and a second end portion at another end of the middle portion. The second end portion is for location adjacent to the first end portion to permit securing of the first and second ends together subsequent to the middle portion being resiliently extended around the shaft. The serpentine-shaped middle portion is sized to be taut on the shaft and is shaped to have a plurality of undulations. The undulations providing a plurality of event members each having at least one characteristic that causes a change of a parameter that can be sensed by a sensor when the event member rotates past the sensor.01-06-2011
20110025314ANGLE DETECTOR - An angle detector includes a rotating member, a housing, a detector and an urging member. The rotating member is rotatable with a shaft inserted therethrough. The housing rotatably supports the rotating member. The detector detects a rotating angle of the rotating member with respect to the housing. The urging member urges the rotating member in a rotating direction of the rotating member. An engagement portion is provided on the housing. An engaged portion is provided on the rotating member. The engaged portion is adapted to be brought into engagement with the engagement portion by urged by the urging member.02-03-2011
20090066323Antenna Orientation Sensor and Method for Determining Orientation - An antenna orientation sensor, having a base, a pivoting support coupled to the base. An actuator operable to move the pivoting support through a calibration movement with respect to the base. A, for example, three axis magnetic sensor on the pivoting support and a position sensor operable to sense the position of the pivoting support within the calibration movement.03-12-2009
20110025313Measurement Method, Sensor Arrangement and Measurement System - In a measurement method, an array of magnetic field sensors (MS02-03-2011
20110025311MAGNETIC ROTARY SYSTEM FOR INPUT DEVICES - Embodiments of the present invention include a roller for an input device, where the roller's absolute angular position is measured by a magnetic encoder. A magnet is attached to the roller, possibly inside the roller so as to make the embodiment more compact. In one embodiment, the magnetization is simple and low cost. Further, tight tolerances are not required, and such a system is easy to manufacture. In one embodiment, the sensor is covered by any non-ferromagnetic material, to protect it from foreign particles, and to reduce ESD. In one embodiment, the wheel consumes much less power than conventional wheels in input devices. In one embodiment, the tilting of the wheel is measured using the same sensor that is used for measuring the rotation of the wheel. In one embodiment, a ratcheting feel provided to the user when rotating the wheel is synchronized with the rotation signal.02-03-2011
20110109305METHOD AND SYSTEM FOR DETERMINING THE ANGULAR POSITION OF A TURBOJET ENGINE ROTOR - The invention relates to a method of determining the angular position of a first rotor of a turbojet, the method consisting in: 05-12-2011
20090309586Gobo Wheel Location Drive - A gobo wheel with automatic detection system that automatically detects a rotational position of the gobo. The rotational position can be detected by a magnetic marking system. Each of the gobos can be randomly placed within the holder. the position of the gobos can be automatically determined during a start up routine for example, and then those positions can be stored and used for later determination of a position.12-17-2009
20100171491EDDY CURRENT SENSORS - An eddy current sensor for use as a dynamic proximity sensor, particularly for monitoring of blade tip timing and clearance in turbomachinery, has a common coil for use in both generating a magnetic field in a proximate region and detecting the effect of eddy currents generated by said field in electrically conductive objects passing through that region. The coil is wound on a rectangular or other elongate former so that the coil is itself elongate in section. This can improve the resolution of the device when used for sensing the passage of objects of elongate section (such as a turbine blade tip when the sensor coil is oriented with its shorter cross-sectional dimension aligned with the shorter cross-sectional dimension of the respective object. Also described is a method of processing a signal wave form from such devices to derive ‘trigger’ points for blade tip timing.07-08-2010
20110115481MAGNETIC ABSOLUTE ENCODER - A magnetic absolute encoder with enhanced resolution is provided. A first cycle determining section 05-19-2011
20110115479Through Shaft Rotary Position Sensor - A rotary position sensor assembly includes a ring magnet extending around the outer surface of a rotatable through shaft. A sensor which measures changes in the direction of the magnetic flux generated by the magnet in response to rotation of the shaft and a pair of magnet pole pieces are located opposite and spaced from the magnet. The sensor is located between the pair of pole pieces and the pole pieces conduct the magnetic flux over the sensor and nominalize the strength of the magnetic flux sensed by the sensor over the full range of rotation of the shaft relative to the sensor.05-19-2011
20110115480Non-Contacting Sensor Assembly - A non-contacting sensor assembly including a connector assembly and a magnet assembly. The connector assembly includes a sensor coupled directly to the end of the terminals of the connector assembly. A sleeve is overmolded around and seals the sensor and the terminals. A capacitor is soldered in a recess in the terminals. The terminals include flexible regions, such as regions of reduced thickness, which reduce the effects of thermal expansion/contraction stresses on the solder. In one embodiment, the sensor assembly is a rotary position sensor assembly in which the magnet assembly is molded into a rotatable drive arm assembly located in a housing, the connector assembly is coupled to the housing, and the sensor extends into the housing and into adjacent relationship with the magnet assembly.05-19-2011
20130154624PERMANENT MAGNET INCLINOMETER FOR AN INDUSTRIAL MACHINE - Permanent magnet inclinometer for an industrial machine. The industrial machine includes a component movable with respect to the industrial machine that includes a first permanent magnet and a second permanent magnet. A circular magnetic sensor array senses a first magnetic flux associated with the first permanent magnet and a second magnetic flux associated with the second permanent magnet. The circular magnetic sensor array includes a first magnetic sensor that senses the first magnetic flux and a second magnetic sensor that senses the second magnetic flux. The controller receives a first flux signal related to the first magnetic flux and a second flux signal related to the second magnetic flux, analyzes the first flux signal to identify a first peak magnetic flux, and analyzes the second flux signal to identify a second peak magnetic flux. The controller then determines the inclination of the component of the industrial machine based on the first peak magnetic flux and the second peak magnetic flux.06-20-2013
20110018527Apparatus for detecting the travel of a lifting motor - An apparatus for detecting the travel of a lifting motor, comprising: a transmission unit positioned within a housing and having a reduction gearset and a transmission gear meshed with the reduction gearset; a threaded rod passing through a housing and threadedly coupled with the transmission gear. The transmission unit includes at least one magnet at one of the gears made of non-permeable material. The magnets are rotated clockwise or counterclockwise with the non-permeable gear when the transmission unit is driven by the motor in rotation. The number of rotation will be detected by a magnetic sensor disposed at the housing through the magnetic line of force generated by the magnet. Thereafter, the detection signals will be transmitted to a travel-calculation unit for measuring the linear displacement distance (travel) of the threaded rod in axial direction. In this way, the built-in detecting structure includes an integral arrangement and is easily secured to the treadmill. Moreover, the external interference may be reduced to enhance the precision and to prolong the service life.01-27-2011
20090033322STATE MEASURING APPARATUS FOR ROTARY MACHINE - There are provided first and second characteristic change portions 02-05-2009
20100219816RESOLVER - A resolver is provided with a rotor plate fitted to a key groove in a rotating shaft and connected to the rotating shaft, and also with a resolver stator for detecting the rotational position of the rotor plate. The resolver stator is provided with a resolver cover for protecting a coil board of a stator core and fixed to the stator core. The coil board is provided with holes fitted to stator pins which are projections of the stator core, coil patterns each formed so as to center on each of the holes, and lead wires connected to the coil patterns formed on the coil board. The outer peripheral portion of the stator core is provided with long mounting holes for fixing the resolver to the housing of a rotating machine, such as an electric motor or a generator, and also with engaging holes engaging with claws of the resolver cover.09-02-2010
20100219817ROTARY POSITION SENSOR - A rotary position sensor for determining the rotary position of a rotary component may include a sensor and a magnet. The sensor may be responsive to a characteristic of a magnetic field that changes as the magnetic field moves. The magnet may be carried by the rotary component for rotation with the rotary component and have an anti-rotation feature to prevent rotation of the magnet relative to the rotary component to maintain a desired rotary position of the magnet.09-02-2010
20110080163ROTATIONAL ANGLE SENSING DEVICE - First and second magnets are installed to an inner peripheral wall of a yoke, which is configured into a tubular form. The yoke is constructed from at least one plate material. At each contact portion, a corresponding circumferential end part of the at least one plate material and another corresponding circumferential end part of the at least one plate material contact with each other. A Hall IC is placed in a magnetic field, which is generated between the first and second magnets.04-07-2011
20090219016System for Detecting an Absolute Angular Position by Differential Comparison, Rolling Bearing and Rotary Machine - System for detecting angular position of a rotating element with respect to a non-rotating element, comprising an annular coder provided with a number P of poles greater than or equal to 2 intended to be fixed to one of the rotating or non-rotating elements and a number N of sensors, with N greater than or equal to 3, that are able to receive a signal originating from the coder and are mounted angularly distributed on the other of the rotating or non-rotating elements facing said rotating or non-rotating element and at least one subtraction module capable of processing at least two output signals from the sensors so as to generate a differential signal.09-03-2009
20090322320ROTATION ANGLE DETECTING DEVICE - A rotation angle detecting device includes a housing, a rotating shaft rotatably held by the housing, a driving gear fixed to the rotating shaft, a driven gear engaged with the driving gear, a magnetic field generating part fixed in the driven gear, having a permanent magnet, and configured to generate a magnetic field, a magnetic sensor element configured to detect a change in the magnetic field due to a rotational movement of the magnetic field generating part, and a signal processor configured to process a signal from the magnetic sensor element for detecting a rotation angle of the rotating shaft. Each of teeth of the driving gear has a first circumferential width, each of teeth of the driven gear has a second circumferential width, and the second circumferential width is greater than the first circumferential width.12-31-2009
20100001720ROTATION SENSOR-EQUIPPED BEARING DEVICE FOR WHEEL - A rotation sensor equipped wheel support bearing assembly detects rotational speed and rotational direction, in which a high resolution rotation signal is utilized in various vehicle controls with a suppressed size. The bearing assembly includes a plurality of rows of rolling elements between rolling surfaces in outer and inner members. A magnetic field generating element having anisotropy about a bearing center axis is provided in the outer member in alignment with the axis. The inner member is provided with a sensor for sensing the magnetic field of the magnetic field generating element oriented axially. The sensor detects the angle of rotation of the magnetic field generating element and is in the form of magnetic sensor arrays or elements for detecting the orientation of the magnetic field with a two-dimensional vector sensor to detect rotation of the magnetic field generating element.01-07-2010
20100013467ROTATION SENSOR - A rotation sensor includes a detecting portion, a rotational state determining portion and a pulse generating portion. The detecting portion detects a rotation of a rotational member and outputs a detection signal. The rotational state determining portion determines a rotational state of the rotational member on the basis of the detection signal in a predetermined period. The pulse generating portion generates and outputs a first pulse and a second pulse, of which waveforms differ from each other, in response to a rotational direction of the rotational member after the predetermined period. The pulse generating portion further generates and outputs a third pulse regardless of the rotational state of the rotational member in the predetermined period.01-21-2010
20100013466Magnetic angle sensor - In order to be able to measure over more than 360° with a magnetic angle sensor, it is proposed not to adjust the distance between the encoder magnet and the sensor element in addition to the rotation, e.g. by means of a thread, like in the prior art, but to maintain said distance constant, but instead to adjust a magnetic variator with respect to its axial distance from the sensor element, or also in transversal direction, which variator can be a flux conductor or also a secondary magnet.01-21-2010
20120242332MEASUREMENT METHOD AND MAGNETIC SENSOR FOR THE CONTACTLESS DETECTION OF MOVEMENTS - A measuring method of contactless magnetic detection of relative movement along a trajectory between a main creation system and a measuring system sensitive to the direction of the magnetic field, the creation system creating a main magnetic field of direction that varies in a plane detected by the measuring system to determine the relative position along that trajectory. The method includes subjecting the measuring system to a compensation magnetic field of direction that is fixed and opposite to the direction of the maximum main magnetic field measured by the measuring system and delivered uniquely by the main creation system and in determining the direction of a magnetic field resulting from the combination of the main magnetic field and the compensation magnetic field by measuring the two mutually-orthogonal components of the resultant magnetic field respectively varying substantially as cosine and sine functions of the angle of the resultant magnetic field.09-27-2012
20100066353ROTATION ANGLE DETECTION DEVICE - A rotation angle detection device comprises a magnet (03-18-2010
20110080162Assembly for detecting more than one rotation through a position encoder magnet - The rotational position of an encoder magnet can be scanned over more than 360° by respective sensor elements in that magnets are disposed on different stages of a suitable transmission, in particular of a differential transmission, and the magnets are scanned by separate sensor elements, whose signals are computed with one another and yield a total number of revolutions.04-07-2011
20100066352Rotation detector and rotation detector-equipped bearing - A rotation detecting device capable of outputting information on the absolute angle using an ABZ phase signal and without extra operation and procedures required, and a bearing assembly having this rotation detecting device incorporated therein are provided. The device includes an absolute angle detecting sensor unit for detecting the rotation angle of a rotating member as an absolute angle and a rotation pulse signal generating section for generating a rotation pulse signal including an index signal corresponding to a zero phase of the absolute angle detecting sensor unit and a pulse signal of a constant interval, based on the absolute angle detected by the absolute angle detecting sensor unit. The rotation pulse signal is outputted in an absolute angle output mode, under which the rotational pulse signal is outputted from a time the index signal is outputted to the current absolute angle.03-18-2010
20090033321Rotational Angle Detection Device - A rotational angle detection device enables rotational angle detection for rotational angles ranging from 0° to 360° with an extremely simple configuration. The rotational angle detection device includes: a rotating magnet 12, which is mounted on one end of a rotating shaft 11; a four-pole auxiliary magnet 14, which is mounted on a substrate 13 opposed to the rotating magnet 12 without contact; and a magnetic sensor 15, which is mounted on the opposite side of the substrate 13. The four-pole auxiliary magnet 14 converts one rotating magnetic field of 0° to 360° provided by the rotating magnet 12 in a region where the magnetic sensor 15 is positioned into another rotating magnetic field of 0° to 180°.02-05-2009
20110175600MAGNETIC ANGULAR POSITION SENSOR FOR A COURSE UP TO 360 DEGREES - The invention relates to an angular position sensor comprising a moving element consisting of at least one essentially cylindrical permanent magnet (07-21-2011
20110101969SELF-POWERED MAGNETIC TACHOMETER - A tachometer for supplying a signal representative of the rotational rate of a rotatable device includes a plurality of detection magnets, an index feature, and one or more non-rotationally mounted magnetic circuits. The detection magnets are coupled to, and spaced around, the device, to thereby rotate with the device when the device is rotated. The index feature is associated with the rotatable device, to thereby rotate with the device when the device is rotated. The index feature and the plurality of detection magnets are spaced evenly around the device. The magnetic circuits are spaced evenly around the device, and each magnetic circuit is configured to supply a first electrical signal each time one of the detection magnets rotates past the magnetic circuit and a second electrical signal each time the index feature rotates.05-05-2011
20110068781RUBBER COMPOSITION FOR MAGNETIC ENCODER AND MAGNETIC ENCODER USING THE SAME - The invention provides a rubber composition for a magnetic encoder being excellent in durability such as heat resistance, oil resistance and chemical resistance, having high magnetic characteristics and being excellent in processability and a magnetic encoder using the rubber composition. The magnetic rubber composition for the magnetic encoder includes a fluorinated rubber with a Mooney viscosity (ML1+10, 121° C.) of 20 to 100 and a magnetic powder, and the magnetic powder is blended in a proportion of 230 to 1900 parts by weight relative to 100 parts by weight of the fluorinated rubber. The magnetic encoder is provided by vulcanizing and molding the rubber composition.03-24-2011
20120119731ANGLE SENSOR - A system for detecting the absolute rotational angle of a shaft rotatable more than one revolution includes a drive wheel connected to the shaft to rotate therewith. The drive wheel includes measurement sectors adjacent to one another in a circumferential direction. First and second driven wheels are engaged to the drive wheel. First and second sensors monitor rotational positions of the driven wheels to thereby detect an absolute rotational angle of the shaft. A third sensor monitors a relative angular position of the shaft in relation to a detected one of the measurement sectors to thereby detect the relative angular position of the shaft within one revolution of the shaft. The detected absolute rotational angle of the shaft is refined with the detected relative angular position of the shaft to thereby generate the absolute rotational angle of the shaft with more precision.05-17-2012
20110068779Bias field generation for a magneto sensor - Embodiments related to the generation of magnetic bias fields for a magneto sensor are described and depicted.03-24-2011
20110050212ACTUATOR - In the case of an actuator having a rotation angle sensor with a magnet, no satisfying solution has yet been found for the attachment of the magnet. The invention relates to an actuator having a rotation angle sensor, the magnet of the rotation angle sensor being provided with a plastic cover. The plastic cover and magnet may be easily connected to a first sensor part of the rotation angle sensor of the actuator. The actuator with the rotation angle sensor can particularly be used in motor vehicles.03-03-2011
20110248708METHODS FOR AN ANALOG ROTATIONAL SENSOR HAVING MAGNETIC SENSOR ELEMENTS - Methods for providing a magnetic sensor, including providing a signal generation module, providing an analog signal processing module for providing an algebraic manipulation of the first waveform and the second waveform to generate a linear position output voltage signal, and providing a signal inversion module coupled to the signal generation module.10-13-2011
20100301844Rotary Encoder - A rotary encoder comprising a magnet, AMR or GMR sensors and an evaluation means. The AMR or GMR sensors are arranged to generate two signals that unambiguously encode the rotary position of the magnet within a predetermined range of rotary positions and a direction of rotation of the magnet. The evaluation means is arranged to derive single-turn and multi-turn information solely from the signals. The encoder is arranged to be switched to a power saving state for a predetermined period of time, to be at least partially reactivated thereafter and to compare a current value derived from the signals with a stored previous value derived from the signals.12-02-2010
20100295541MULTI-ROTATION ANGLE DETECTION DEVICE - A rotating axis of a first driven gear provided with a magnet and a rotating axis of a second driven gear provided with a magnet are orthogonalized with respect to a plane which includes a rotating axis of a rotor having a first gear and a second gear each with a different number of teeth concentrically provided for a flanged gear forming section.11-25-2010
20080238416ROTATION ANGLE DETECTOR - A rotation angle detector includes a rotator, first and second detecting bodies, an auxiliary detecting body, first and second detectors, an auxiliary detector, and a controller. The first detecting body rotates in association with the rotator, and the first detector detects rotation of the first detecting body. The second detecting body rotates in association with the first detecting body at a different speed therefrom, and the second detector detects rotation of the second detecting body. The auxiliary detecting body is engaged with the rotator at a position symmetrical to the first detecting body with respect to a rotation axis of the rotator. The auxiliary detector detects rotation of the auxiliary detecting body. The controller detects a rotation angle of the rotator based on detection signals from the first, second, and auxiliary detectors.10-02-2008
20100253328MAGNETIC TWEEZERS METHOD TO MEASURE SINGLE MOLECULE TORQUE - A system and a method for determining the torque imposed on a filament, such as a single DNA strand or macromolecule, using a magnetic probe and an imaging device.10-07-2010
20080238415MEASURING SYSTEM FOR CONTACTLESS DETECTION OF A ROTARY ANGLE, WITH A MAGNETIC-FIELD-SENSITIVE ELEMENT DISPOSED IN A RECESS OF THE MAGNET - The invention relates to a measuring system for contactless detection of a rotational angle, having a first body on which at least one magnet is disposed and having at least one magnetic-field-sensitive element, supported by a second body, for generating a measurement signal, the first body and the second body being rotatable counter to one another about an axis of rotation, and the magnet having a blind-borelike recess. The invention provides that the at least one magnetic-sensitive element protrudes at least partway into the recess.10-02-2008
20090153136Pulsar Ring for Rotary Encoder - A pulsar ring for a rotary encoder has a mounting ring (06-18-2009
20090134866Rotation detecting device and method for manufacturing the same - A rotation detecting device includes a rotation detecting element detecting rotation speed of a rotating object and including lead terminals, a holder integrally molded with an electrode terminal to which the lead terminals are connected, including an opposing surface in opposition to the rotating object and a contact surface on the opposite side of the opposing surface, and accommodating the rotation detecting element, a cover accommodating the holder and including a bottom face portion in contact with the holder at the contact surface and a peripheral wall portion formed along the periphery of the bottom face portion, and a housing molded with resin, accommodating a lateral face of the holder being in contact with the cover, and fixing the holder to the cover. The holder includes a first resin filling portion filled with a first resin and a second resin filling portion isolated from the first resin filling portion.05-28-2009
20080303516Method and Circuit Arrangement for Determining the Rotor Position of an Ec Motor in the Standstill State - The invention relates to a method and a circuit arrangement for determining the position of the rotor of an electronically commutated motor having a plurality of stator phases, whose rotor has magnetic axes having different permeances. Voltage is applied to the stator phases, and the resultant phase currents are monitored for the purpose of determining the rotor position in the standstill state of the motor. For this purpose, first and second rise times of the phase currents are determined until predetermined limit values are reached on the one hand in the unsaturated state, and on the other hand using saturation effects of the rotor core and/or stator core. The assignment of a magnetic axis to a stator phase is determined from the first rise times of the currents in the unsaturated state of the rotor core, and also the polarization of the rotor is determined from the second rise times of the currents in the event of energization with saturation effects. In addition, in a further measurement step after run-up of the motor, an initial energization of the stator, which results from a limit position of the rotor at the sector limit of two stator phases and is unfavorable for a high run-up torque of the motor, can be determined by comparison of the levels of the magnet wheel voltages and corrected by changing the commutation of the stator energization.12-11-2008
20080272770Current-Loop Position Sensor and Rolling Bearing Equipped with Same - The invention concerns a system for determining the position of mobile element relative to a stationary structure, said system comprising an encoder configured to emit a pseudo-sinusoidal spatial signal representing the position of the encoder, a sensor (11-06-2008
20120242331HALL-BASED ROTATIONAL ANGLE MEASURING SYSTEM, IN PARTICULAR FOR HAND-OPERATED THROTTLES - The invention relates to a sensor assembly (09-27-2012
20080252285Machine with a rotary position-sensing system - A machine includes a first component and a second component between which relative rotation can occur about a rotation axis. The machine may also include a rotary position-sensing system, which may include a plurality of magnets mounted to the first component. The plurality of magnets mounted to the first component may include a first magnet and a second magnet mounted to the first component at different angular positions around the rotation axis. The first magnet may be magnetized in a first direction that is at an angle to a circle that extends through the first magnet perpendicular and concentric to the rotation axis. The rotary position-sensing system may also include a magnetic-flux sensor mounted to the second component to sense magnetic flux generated by at least one of the first magnet and the second magnet and generate a signal.10-16-2008
20080252286MULTIPLE TRACK SENSE MAGNET ASSEMBLY - A sense magnet assembly including a generally circular hub portion defining a central axis. The hub portion includes a generally disk-shaped base portion and an outer wall extending axially from an outer edge of the base portion. An elastic magnet material is provided including a plurality of annular portions positioned at radially spaced locations. A substantially rigid annular divider formed of a non-magnetic material is located between adjacent pairs of the annular portions of the magnet material, and a rigid cover is provided extending over the magnet material to limit movement of the magnet material in response to centrifugal forces.10-16-2008
20100321008ROTATION-ANGLE-DETECTING APPARATUS, ROTATING MACHINE AND ROTATION-ANGLE-DETECTING METHOD - An apparatus for detecting a rotation angle using a magnet rotor comprising a magnet having 2N poles, wherein N is a natural number, and a sensor device for detecting the direction of a magnetic flux from the magnet rotor, at least one of two output voltages obtained in radial and rotational directions by the sensor device being multiplied by a correction coefficient, and the rotation angle being calculated from the two corrected output voltages to increase the detection accuracy of the rotation angle.12-23-2010
20100321006Rotational Angle-Measurement Apparatus and Rotational Speed-Measurement Apparatus - A rotational angle-measurement apparatus with high accuracy is provided through the electric correction of the rotational angle-measurement apparatus by rotating the rotation shaft at a constant speed.12-23-2010
20100321007SHEET COIL TYPE RESOLVER - A sheet coil type is provided in which a detection coil of two phases is disposed at a stator section and structured such that a coil of sine phase a coil of cosine phase are circumferentially arranged alternately on the same plane, wherein the distance between an excitation coil at a rotor section and the coil of sine phase at the stator section is identical to the distance between the excitation coil at the rotor section and the coil of cosine phase at the stator section, whereby the difference in amplitude between at a sine phase output and at a cosine phase output is eliminated.12-23-2010
20110068780ROTATIONAL ANGLE SENSOR, MOTOR, ROTATIONAL ANGLE DETECTOR, AND ELECTRIC POWER STEERING SYSTEM - A rotational angle sensor includes: a magnet rotor in which multiple magnetic poles are formed along the circumferential direction of the magnet rotor; and three sensor devices that are arranged on a circle concentric with the magnet rotor at regular angle intervals. Each of the sensor devices includes three half-bridge circuits each of which has a pair of spin valve magnetic resistances that are connected in series in such a manner that the magnetization directions of spin fixed layers of the spin valve magnetic resistances are opposite to each other. Each of the sensor devices is formed in such a manner that phases of the sensor signals output from the respective half-bridge circuits based on a change in magnetic flux caused by the rotation of the magnet rotor are offset from each other by an electrical angle of 120°.03-24-2011
20110254542Assembly for an Angular Position Measuring Device - An assembly for an angular position measuring device includes a shaft having a measuring standard for measuring a rotational movement about an axis. The shaft has a shoulder as an integral component, on which a roller bearing is mounted in axial abutment. Arranged between the shoulder of the shaft and the roller bearing is a groove which is oriented with a radial directional component and is connected to a hollow space for receiving lubricant, the hollow space being bounded in the radial direction by a ring of the roller bearing and by the shaft.10-20-2011
20110254543MAGNETIC POSITION SENSOR WITH FIELD DIRECTION MEASUREMENT AND FLUX COLLECTOR - The present disclosure relates to a magnetic position sensor with field direction measurement and a flux collector. The disclosure proposes to measure two magnetic induction components at one and the same point, harmonizing the amplitude of the two magnetic induction components using flux collectors so as to have a ratio of the amplitudes of these two components close to one. For this purpose, the disclosure provides a contactless position sensor including at least one permanent magnet, emitting a magnetic field, at least one detection element sensitive to the direction of the magnetic field, and at least one pair of flux collectors, the permanent magnet being capable of moving in a direction of displacement and having a direction of magnetization that can be continuously varied according to the direction of displacement. Each flux collector has at least one portion, provided with an end, extending substantially along the direction of displacement of the magnet. The ends of a pair of flux collectors define a gap oriented along the direction of displacement of the magnet. The detection element is positioned outside the gap and substantially equidistant from the ends.10-20-2011
20100301845ABSOLUTE MEASUREMENT STEERING ANGLE SENSOR ARRANGEMENT - An angle sensor arrangement for measuring the rotational angle of a shaft comprising a first gearwheel and a first magnetic encoder with at least one encoder track. The first gearwheel and the first magnetic encoder rotate with shaft. The angle sensor arrangement also comprises a second gearwheel and a second magnetic encoder with at least one encoder track. The second encoder rotates with the second gearwheel, and the first and second gearwheels interact. At least one magnetic field sensor element is assigned to the first encoder and to the second encoder, respectively and the first and second gearwheels are embodied in terms of their common transmission ratio and the first and second magnetic encoders are embodied in terms of their pole numbers.12-02-2010
20110260719ROTATIONAL ANGLE SENSORS AND MANUFACTURE METHODS THEREOF - A rotational angle sensor has a molded body made of a resin and having a substantial cylinder shape with a center axis, and a conversion IC buried in the molded body and having a magnetic sensing portion, a computing portion and leads connecting the magnetic sensing portion with the computing portion. The magnetic sensing portion is disposed nearly perpendicular to the center axis of the molded body. The leads are bent such that the computing portion is disposed parallel to the center axis of the molded body and that a connection between one of the lead and the computing portion is positioned closer to the center axis of the molded body than a radially outer end of the lead.10-27-2011
20110260718Sensor device for detecting the rotational position of a rotating shaft - A sensor device for detecting the rotational position of a rotating shaft, which is rotatably mounted in a housing, comprises a transducer magnet fastened to a carrier pin, which is accommodated in a recess in the end face of the shaft.10-27-2011
20110260717DEVICE FOR SELF-ADJUSTING AND METHOD FOR ARRANGING AN IMPULSE TRANSMITTER IN RELATION TO A ROTOR - An apparatus for self-adjustment of, and a method for disposing, a pulse-type rotation speed transducer in relation to a rotor are described. The pulse-type rotation speed transducer has a cylindrical sensor head and an adapter to a measurement and power supply cable. An elastic clamping sleeve that radially encompasses the cylindrical sensor head is disposed in frictionally engaged fashion in a bore of a holder, the clamping sleeve forming a press fit for the sensor head in the bore. The press fit enables a rotation and an axial displacement between the holder and sensor head. The pulse-type rotation speed transducer has an active, orientation-dependent, cylindrical sensor head, and the clamping sleeve or the pulse-type rotation speed transducer has a twist prevention system in relation to the holder. The twist prevention system enables an axial displacement of the sensor head in the clamping sleeve with respect to the rotor, for self-adjustment, while maintaining the radial alignment or orientation of the sensor head with respect to the rotor.10-27-2011
20100117632Resolver - A resolver includes a disc-shaped rotor provided with a detection coil pattern formed in flat shape and a stator formed in flat plate shape placed to concentrically fact the rotor in an axial direction and configured such that a planar first excitation coil pattern to which a cosine wave is supplied and a planar second excitation coil pattern to which a sine wave is supplied, the first and the second patterns being laminated. The first and second excitation coil patterns are placed to face the detection coil pattern. An insulation layer is formed with insulating coating material between the first and second excitation coil patterns.05-13-2010
20120146628System and Method for Determining Slue Position - A slue position sensing system and method of modifying a machine to include such a slue position sensing system are disclosed. The slue position sensing system may include a swing sensor housing disposed between a swing motor and a swing drive. The swing sensor housing may be coupled to a rotary position sensor that indirectly detects rotation of the target gear or a speed sensor that directly detects rotation of the target gear. For embodiments with no target gear, but with upper and lower frames rotatably coupled together by a ring gear and a swing gear, the sensor may be a rotary position sensor mounted to a slip ring assembly and magnet that are connected to a hydraulic swivel between the upper and lower frames or the sensor may be a speed sensor that detects rotation of the swing gear. The sensors generate a signal that is communicated to a controller or an ECM that accurately reflects the angular movement imparted to the work implement by the swing drive.06-14-2012
20110074400ROTATION ANGLE DETECTING DEVICE - Provided is a rotation angle detecting device with high detection accuracy, which can be structured with a small number of teeth even if a shaft angle multiplier increases, thus enhancing winding workability and becoming suitable for mass production. The rotation angle detecting device includes: a stator formed of an iron core with teeth, the stator including: an exciting winding of one phase or more; and output windings of two phases or more; and a rotor with a salient pole, in which numbers of turns of the output windings of the two phases each have a value obtained by a function containing a sum or a difference between a sine wave of an order equal to an absolute value of a sum of a number of the salient poles and a number of the pole pairs, and a sine wave of an order equal to an integer that is different from an absolute value of the number of the pole pairs of the exciting winding and different from an absolute value of a difference obtained by subtracting the number of the salient poles from the number of the pole pairs.03-31-2011
20110127996APPARATUS AND METHOD FOR DETERMINING THE ROLL ANGLE OF A DEVICE WITH A HOUSING - The invention relates to an apparatus for determining the roll angle of a device having a housing, wherein a coil, which is arranged on or in the housing so as to be rigid in relation to the housing of the device, and an actuation electronic system, which generates voltage profiles that are limited chronologically by means of the coil, are provided.06-02-2011
20100060272ROTATION ANGLE DETECTOR - A rotation angle detector for detecting a rotation angle of a detectable rotation body, comprises: a primary rotation body to be attached to the detectable rotation body and to rotate as integral with the detectable rotation body; a secondary rotation body to rotate as a predetermined rotation ratio for the primary rotation body; a primary rotation detection mechanism to output a signal to be varied periodically as corresponding to a rotation of the primary rotation body; a secondary rotation detection mechanism to output a signal to be varied periodically as corresponding to a rotation of the secondary rotation body; a signal processing unit to calculate the rotation angles of the primary and the secondary rotation bodies using the signals that the primary and the secondary rotation detection mechanisms output; and an operation processing unit to calculate the rotation angle of the detectable rotation body, based on the calculated rotation angle of the primary or of the secondary rotation body, and on a relative rotation angle between the primary and the secondary rotation body, wherein at least any one of the following signals (A) to (D) is designed to have a cycle as different from one cycle for one rotation of the primary rotation body or of the secondary rotation body; (A) an output signal of the primary rotation detection mechanism; (B) an output signal of the secondary rotation detection mechanism; (C) an input signal from the primary rotation detection mechanism to be processed at the signal processing unit; and (D) an input signal from the secondary rotation detection mechanism to be processed at the signal processing unit.03-11-2010
20080218161Magnetized pulsar ring, and rolling bearing device with sensor using the same - A magnetized pulsar ring of the invention is a pulsar ring fixed to an outer peripheral surface of a supporting member and including a ring body in which a number of magnetic poles are at predetermined intervals in a peripheral direction. The ring body 09-11-2008
20080218160Sensor magnet device, gear mechanism and speed reducing electric motor - In a speed reducing electric motor, a speed reducing gear unit has a sensor magnet device, which is fixed to a worm wheel and includes an inner ring magnet, an outer ring magnet and connecting portions. The inner ring magnet is placed along a predetermined first imaginary circle. The outer ring magnet is placed along a predetermined second imaginary circle, which is coaxial with the first imaginary circle and has a diameter that is smaller or larger than that of the first imaginary circle. The connecting portions connect between the inner ring magnet and the outer ring magnet. The sensor magnet device is fixed to the worm wheel by a magnet fixing structure.09-11-2008
20120098528MEASURING VIBRATION IN A ROTATING ELEMENT - A system for measuring a variation in a distance of an axis of rotation of an object relative to a point in a plane perpendicular to this axis comprises at least two sensors for measuring a value representing an angular position of said object about said axis, at least a first of said sensors, whose position is fixed relative to said point, comprising a magnetometer suitable for measuring the magnetic field generated by said object whose magnetization varies around its circumference; and means for determining said variation of distance on the basis of a variation in an angular deviation between said sensors relative to the axis, from one revolution of said object to the next.04-26-2012
20110187359Bias field generation for a magneto sensor - Embodiments related to the generation of magnetic bias fields for a magneto sensor are described and depicted.08-04-2011
20110187358METHOD AND DEVICE FOR MONITORING A ROTATIONAL ANGLE SENSOR - The invention relates to a monitoring method in which two variables of angle-dependent, amplitude-modulated carrier frequency signals are emitted on orthogonal windings (08-04-2011
20110187355METHOD OF PROCESSING ENCODER SIGNALS - A method of processing signals in a rotary encoder of the kind which comprises at least one annular track of encoding regions arranged as an alternating pattern of first encoding regions and second encoding regions, comprises providing a first detector at a first fixed position which is arranged to produce a first alternating output signal as the track of encoding regions rotates about its axis past the detector, the alternating signal comprising a series of transitions between a first state corresponding to the detector being aligned with a first encoding region and a second state corresponding to the detector being aligned with second encoding region; 08-04-2011
20110187357Magnetic position encoder - Magnetic position encoders for magnetic angle sensors generally comprise two encoder magnets, which are symmetrically arranged on a base plate. According to the invention, these encoder magnets including the base plate are encased through injection molding. For this purpose, the base plate is configured as a sheet metal stamped part with stop ears which are folded upward, however, they are only folded upward at the ends of the magnets in order not to distort the information of the magnetic field excessively.08-04-2011
20110187356RESOLVER UNIT - A resolver unit including a first resolver and a second resolver. The first resolver includes a first rotor. A certain number of first rotor magnetic poles are annularly disposed on the first rotor at equal intervals. The second resolver includes a second rotor coaxial with the first rotor. A certain number of second rotor magnetic poles are annularly disposed on the second rotor at equal intervals. The number of the second rotor magnetic poles is different from the number of the first rotor magnetic poles.08-04-2011
20100026282Angle detecting apparatus and angle detecting method - An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged close to the outer periphery of the rotor so as to have a difference in angle (π/2) with respect to the center of rotation of the rotor, a differential operational circuit performing differential operation on detection signals output by the magnetic sensors to output a differential signal, and the angle calculating circuit calculating the angle of rotation of the rotating shaft based on the differential signal. The planar shape of the rotor is such that the sum of the distances between the center of rotation and the respective two points where two straight lines crossing at the center of rotation at a crossing angle of (π/2) cross the outer periphery of the rotor is constant, and the planar shape is symmetric with respect to a straight line passing through the center of rotation.02-04-2010
20100019761Rotation detection device and bearing having rotation detection device - To provide a rotation detecting system of a type having a high detecting resolution, in which the rotational position can be detected accurately, in which a sufficient gap can be secured between the sensor and the rotating body and which is effective to simplify assemblage and processing to thereby reduce the manufacturing cost, the rotation detecting system is provided with a multiplying section 01-28-2010
20120146630ROTATING ANGLE DETECTING SENSOR - An angle detection error is prevented by using a columnar permanent magnet that is radially double-pole-magnetized as a rotating angle detecting sensor while avoiding a gap between a magnetic sensor and one end face of the permanent magnet from being narrowed. A permanent magnet (06-14-2012
20090102466Bearing with absolute angel sensor - To provide a rotation sensor equipped bearing capable of detecting a highly precise absolute angle with no correction work required after incorporation into a bearing installed equipment, an absolute angle sensor equipped bearing assembly includes a sensor equipped bearing 04-23-2009
20090174398Reel shaft of barcode printer - A reel shaft sensor is provided for a barcode printer and is applied to a reel shaft of the barcode printer. The reel shaft sensor device includes a plurality of magnetic elements and at least one magnetic sensor. The reel shaft has an end to which a connection member is mounted for coupling the interior of a housing of the barcode printer. The magnetic element is arranged inside the connection member and the magnetic sensor is installed inside the housing of the barcode printer and corresponding in position to the connection member. The magnetic sensor detects a magnetic signal from the magnetic elements that rotates with the reel shaft to determine the rotational speed and angular position of the reel shaft. The device is a small-size, magnetism operating shaft sensor.07-09-2009
20110043198ARRANGEMENT FOR DETECTING A ROTATION ANGLE - The invention relates to an arrangement for detecting rotation angles on a rotating component, having transducers and sensors, detecting a physical variable as digitally processable signals as a function of the rotation angle change of the rotating component. The rotating component has at least one satellite of a smaller circumference that is coupled at the circumference thereof and rotates by means of the rotation thereof, preferably having an angle sensor, which drives a likewise rotating hypocycloidal disc or hypocycloidal gear wheel via an axially coupled hypocycloidal gearbox, the circumferential speed of which can be geared down by the hypocycloidal gearbox such that a speed of the rotating component and the absolute wheel angle across multiple revolutions of the steering axle can be determined using a revolution sensor system.02-24-2011
20090108837MAGNETIC AUDIO VOLUME CONTROL, CONNECTOR SYSTEM WITH MAGNETIC AUDIO VOLUME CONTROL, AND METHOD - Electronic equipment control of a parameter of electronic equipment includes magnetic encoder responsive to magnetic input to provide control output for electronic equipment, a connector member connects electrically with a further connector member; the magnetic encoder receives magnetic input representing relative motion between the further connector member and the connector member to provide such control output. The further connector member has an electrical terminal connectible with the connector member, a magnet positioned relative to the electrical terminal for movement therewith providing magnetic output representing such movement, and the magnet and magnetic encoder are in proximity for magnetic coupling to provide the magnetic encoder magnetic force representing relative movement of the connector member and further connector member. A method of adjusting a parameter of electronic equipment includes effecting relative movement between connected parts of an electrical connector, and using magnetic force representation of such relative movement adjusting such parameter.04-30-2009
20090096444Pulsar Ring of Magnetic Rotary Encoder - To hold a pulsar ring (04-16-2009
20120146629Measurement Of Shaft Speed, Angular Displacement, Position Or Movement - The disclosure relates to improvements in the measurement of shaft speed. The shaft has an end face and at least one detection mark provided on or in the end face of the shaft to enable the speed, angular displacement, position or movement of the shaft to be detected. The shaft is for use in a shaft assembly comprising a sensor positioned at a distance from the shaft end face. The sensor is configured to measure the speed, angular displacement, position or movement of the shaft by sensing movement of the detection marks.06-14-2012
20110304324MAGNETIC ENCODER - A magnetic encoder having at least one encoder track including one or more pole pairs, wherein the magnetization directions of subregions within at least one of the poles are embodied so as to change substantially continuously and/or monotonically along the encoder track.12-15-2011
20120306480ROTATIONAL ANGLE SENSOR SYSTEM AND METHOD FOR THE PRODUCTION THEREOF - Using integrated multi-component assembly injection moulding, a two-part magnetic rotational angle sensor system having high sensing accuracy is very efficiently integrally produced in a tool as a functional unit that can be directly applied, comprising a polymer-bonded permanent magnet as a passive transmitter part in the first section, which can be rotated relative to the material of the active sensor receiver part, which material is sprayed thereon and then shrunk, with the potted receiver. For this purpose, injection moulding materials are used that are mutually incompatible for adhesion and lift off from one another over the mutual contact regions due to shrinkage.12-06-2012
20120038351ROTATING FIELD SENSOR - A field generation unit generates a rotating magnetic field including a first partial magnetic field in a first position and a second partial magnetic field in a second position. The first and second partial magnetic fields differ in direction by 180° and rotate in the same direction of rotation. A first detection unit located in the first position has first and second detection circuits whose output signals differ in phase by ¼ the period. A second detection unit located in the second position has third and fourth detection circuits whose output signals differ in phase by ¼ the period. A detected value of the angle that the direction of the rotating magnetic field in a reference position forms with respect to a reference direction is calculated based on a first signal generated from the output signals of the first and third detection circuits and a second signal generated from the output signals of the second and fourth detection circuits.02-16-2012
20120038350POSITION SENSOR - A position sensor, preferably an angle sensor for detecting the rotational angle of a shaft. The position sensor has a lead frame on which the electronic components of the position sensor are arranged and to which they are electrically connected A plastic encapsulation enclosing at least the electronic components, thereby forming a sensor module with the lead frame, and a plurality of electrical connections of the sensor module which are formed by the lead frame and a carrier module accommodating the sensor module. The carrier module has electrical connections connected to the electrical connections of the sensor module in an electrically conducting manner. The carrier module has at least two domes between which the sensor module is arranged. The respective free ends of the domes are deformed in such manner that the sensor module is clamped fixed in its position.02-16-2012
20100264912ROTATION ANGLE SENSOR - A rotation angle sensor includes a rotation shaft, a yoke which is made from a magnetic permeable material and includes a first disk portion, a second disk portion and a connection portion magnetically connecting the first disk portion and the second disk portion, the first disk portion and the second disk portion being provided on the rotation shaft in an axial direction of the rotation shaft separately, a first permanent magnet and a second permanent magnet, each having a disk shape which has a uniform plate thickness in a circumferential direction thereof, and which are provided on a first face of the first disk portion and a second face of the second disk portion respectively, the first face being opposed to the second face, a magnetic field detection section which is provided between the first permanent magnet and the second permanent magnet, and generates an output signal in response to an intensity of a magnetic field formed by the first permanent magnet and the second permanent magnet during a rotation of the rotation shaft. The first permanent magnet and the second permanent magnet are inclined with respect to a direction perpendicular to the axial direction of the rotation shaft so that a distance of a line passing through the magnetic field detection section and connecting the first disk portion and the second disc portion in the axis direction of the rotation shaft is gradually changed in accordance to the rotation of the shaft.10-21-2010
20110068778ELECTRONIC MEASURING WHEEL - An electronic measuring wheel has a casing, a distance wheel and an operating shaft. The casing has a power supply, a seven-segment display and a sensor. The seven-segment display is mounted in the casing and is electrically connected to the power supply. The sensor is mounted on the seven-segment display in the casing and is electrically connected to the power supply and the seven-segment display. The distance wheel is rotatably connected to the casing and has a distance wheel axle and an induction ring. The distance wheel axle has an inner end mounted in the casing. The induction ring is mounted around the inner end of the distance wheel axle near the sensor. The operating shaft is connected to the casing03-24-2011
20120038349Triple Hall Effect Sensor Absolute Angular Encoder - The present invention is an array of three Hall Effect sensors placed at specific positions around a permanent magnet attached to a rotor or a magnetic rotor. The purpose of an absolute encoder is to provide the precise angular position of the rotor at any time. A magnetic absolute encoder uses sensors that read magnetic field values. The present invention is a novel design in the field of absolute encoders that increases encoder accuracy and resolution while avoiding the high cost that accompanies sophisticated sensors. This invention is a simple, effective and affordable solution to collect and process sensor information to determine rotor position. The position of the rotor can be determined to an accuracy of one degree.02-16-2012
20100097055ANGLE DETECTOR - An angle detector with a shaft angle multiplier of 32× shown in FIG. 04-22-2010
20100097053ROTATING ELECTRIC MACHINE AND MANUFACTURING METHOD THEREFOR - There is provided a rotating electric machine including a rotation sensor unit capable of demonstrating a shielding effect over a wide frequency bandwidth and a manufacturing method therefor. In the rotating electric machine, a power unit provided with a switching element that controls an electric current that flows in a stator winding and a magnetic-field current control circuit unit provided with a switching element that controls an electric current that flows in a rotor winding are arranged on a predetermined surface of one of a pair of brackets that pivotably support a rotor shaft, and the rotation sensor unit is disposed in the vicinity of the predetermined surface of the one bracket; The rotating electric machine is characterized in such a way that there is provided a ring-shaped member that is fixed on the outer surface of the rotation sensor unit, and the ring-shaped member is configured with a non-magnetic unit having an electric conductivity and a magnetic unit.04-22-2010
20100097052RESOLVER INTERFACE AND SIGNAL CONDITIONER - A resolver interface includes separate anti-aliasing filters for sine and cosine signals. The separately filtered signals are then time share multiplexed to a single analog to digital (A/D) converter. Because all of the inputs are fed through the same A/D converter, any error, difference or shift caused by the A/D converter is shared across al of the inputs. A Field Programmable Gate Array (FPGA) and processor are used to digitally filter, demodulate and compute position.04-22-2010
20110316530ROTATION ANGLE DETECTION APPARATUS - In a rotation angle detection apparatus, a signal detected by a magnetoresistive element is digitalized before being subjected to subtraction of the optimum correction parameter therefrom in a subtractor, the optimum correction parameter being stored in advance in a memory. Note that during the initial transmission at the time of activation, the data size “n” of a detection target obtained by a CPU from a control device is transferred to the memory, so that the optimum correction parameter for the data size of the detection target is selected. With the above, the detection unit can relatively readily cope with a request for enlargement or the like of a through hole size made by a machine side, and detection accuracy is not deteriorated and an error in absolute position processing is reduced when the curvature of the detection target is changed.12-29-2011
20110101970POSITION SIGNALING DEVICE - A position signaling device is disclosed for detecting a position of two metallic or metal-coated components that can move relative to one another. the device can include a magnetic field-sensitive sensor and at least one bias magnet that are spatially separated from one another and are arranged in a stationary manner relative to one another. The magnetic field-sensitive sensor and the bias magnet on two sides border a receiving gap in which one of the two components can be moved relative to the other. The magnetic field-sensitive sensor and the bias magnet are connected to one of the two components. In a vicinity of the magnetic field-sensitive sensor and/or of at least one bias magnet, at least one flux concentrator is arranged such that a largely closed magnetic circuit is formed.05-05-2011
20110156699MULTI-TURN ANGLE SENSOR - A multi-turn angle sensor includes rotors 06-30-2011
20120001623SENSOR WITH LASER WELDED COVER - In order to configure a housing of a sensor, in particular of an angle sensor, long term leak tight in the best way possible a cover is not glued into the pot shaped housing or screwed in and sealed, but welded in the housing through a laser. In spite of the sensor chip already being in the housing, the heat induction is so small that the sensor chip is not damaged even though the sensor chip is very small.01-05-2012
20120176125DEVICE FOR SENSING POSITIONS OF A ROTATING WHEEL - A device for sensing positions of a rotating wheel comprises a rotating wheel with a symmetrical weight distribution, with the rotating wheel being rigidly attached to an axle; a stationary plate coaxial with the rotating wheel, the stationary plate being free to rotate about the axle and having an asymmetrical weight distribution to keep the stationary plate stationary due to the forces of gravity; and a position sensor to sense positions of the rotating wheel.07-12-2012
20090091315ROTATION DETECTOR - A rotation detector includes: a magnet to form a magnetic field between the magnet and a rotary member; a magnetism detection element positioned in the proximity of the magnet to detect a variation in the magnetic field due to a rotation of the rotary member; and a signal processing circuit 04-09-2009
20120007593MAGNETIC SENSOR PACKAGE - In a magnetic chip package including a metal thin film, which is constituted of a metal material containing a magnetic body and is disposed on a surface of a plastic substrate opposite to the side a sensor chip is fixed, a demagnetizing field is generated in the metal thin film in a direction orthogonal to the direction of a magnetic field detected by a magnetic sensor. Specifically, the metal thin film is formed of plural metal thin sub-films, each metal thin sub-film having a rectangular shape with a length orthogonal to the direction of the magnetic field detected by the magnetic sensor larger than a width parallel to the direction of the magnetic field, and each metal thin sub-films are aligned at predetermined intervals in a direction parallel to the direction of the detected magnetic field.01-12-2012
20120007592ROTATION POSITION SENSOR - A rotational position sensor includes a rotor substrate and a stator substrate placed to face each other to detect rotational displacement of the rotor substrate. The rotor substrate is formed with an excitation coil in a meandering pattern on an outer circumferential side and a rotor-side rotary transformer on an inner circumferential side. The stator substrate is formed with four detection coils in a meandering pattern on an outer circumferential side and a stator-side rotary transformer on an inner circumferential side. The four detection coils are arranged in a circumferential direction without overlapping each other. The detection coils are displaced from each other by 360°/8. The rotational position sensor includes a high frequency excitation circuit for applying a high frequency signal to the excitation coil through the rotor-side rotary transformer and the rotor-side rotary transformer to excite the excitation coil.01-12-2012
20120062218ROTATION ANGLE DETECTING UNIT - A rotation angle detecting unit includes an IC package having a magnetism detecting element, a sealing body, and leads; and a covering member having a fixing part and a supporting part, which are integrally formed from resin. The element outputs a signal according to change of a magnetic field generated upon rotation of a magnetism generating device attached to a detection object. The sealing body covers the element. The leads are connected to the element, and project from the sealing body. The fixing part is fixed to a supporting body so that the covering member is attached to the supporting body. The supporting part supports the package such that the element can output the signal. The package is press-fitted into the supporting part after its formation, so that the package is supported by the supporting part with a predetermined pressure applied to part of an outer wall of the sealing body.03-15-2012
20120043961MEASURING DEVICE - Measuring device, in particular for in-process measurement of test pieces during a machining operation on a machine tool, in particular a grinding machine, has a measuring head which is movable relative to a base body of the measuring device between a neutral position and a measuring position in which the measuring head is in measuring contact with the test piece. At least one angle sensor is associated with the measuring head for detecting the angular position of the measuring head, in particular changes in the angular position of the measuring head relative to the test piece, during a measuring operation.02-23-2012
20100176805SENSOR HOLDING DEVICE - This device (07-15-2010
20120013329ROTATION SENSOR DEVICE FOR WHEEL - A rotation sensor device for a wheel including a core metal member configured to attach to an outer member of a wheel bearing device and having a containment recess protruding in a direction of a pulser ring provided on an inner member. The rotation sensor device further includes a sensing portion formed by molding a sensor element with a synthetic resin material as a separate component from the core metal member. The sensing portion is fixed within the containment recess and positioned opposite the pulser ring with a bottom wall of the containment recess positioned therebetween.01-19-2012
20090243599MULTIPLE-ROTATION ABSOLUTE ENCODER - A multiple-rotation absolute encoder attached to an actuator provided with a motor and a reduction gear comprises a multiple-rotation value counter for counting a multiple-rotation value representing a number of rotations of a rotating shaft of the motor from a predetermined origin; a memory part for storing a reduction ratio R of the reduction gear; and a counter-controlling part for setting a range of the count value of the multiple-rotation value counter from zero rotations to (R−1) rotations on the basis of the reduction ratio R stored and maintained in the memory part, resetting the count value to zero when the rotating shaft makes a single rotation in a forward direction from a state in which the count value is (R−1), and setting the count value to (R−1) when the rotating shaft makes a single rotation in a reverse direction from a state in which the count value is zero. The rotation-angle position within a single rotation of the output shaft can be specified without the multiple-rotation value counter overflowing, even when the actuator rotates continuously in one direction.10-01-2009
20120206131RESOLVER AND RESOLVER-ROLLING BEARING UNIT - A resolver includes: a resolver rotor attached to a rotational shaft; an annular resolver stator that is provided on a radially outer side of the resolver rotor and that has a plurality of teeth each opposed, across a clearance, to an outer peripheral face of the resolver rotor and circumferentially arranged at given intervals; and a case member having a cylindrical fit portion to which an outer peripheral face of the resolver stator is fitted. At least three protrusions, each protruding radially outward, are formed at given circumferential intervals on the outer peripheral face of the resolver stator, so that the outer peripheral face of the resolver stator is press-fitted to an inner peripheral face of the fit portion at positions at which the protrusions are formed.08-16-2012
20120153940Magnetically Coupled Rotary Magnetic Encoder with Angle Error Reduction - A rotary magnetic encoder assembly of noncontact or “contactless” construction having an internally disposed first exciter or sensor magnet magnetically coupled to an externally disposed second application or drive magnet attached to an encoder shaft that rotates the sensor magnet substantially in unison therewith during encoder shaft rotation. The sensor magnet is rotatively supported by a friction reducer that is a bearing arrangement that provides point bearing contact preventing stiction and reducing dynamic friction of the sensor magnet minimizing angle error and helping to prevent “Quiver.” In one embodiment, the friction reducer is a spherical ball bearing. In another embodiment, the friction reducer is a thrust bearing that includes a spindle carrying the sensor magnet. A magnetic anchor can be disposed between the sensor magnet and drive magnet to help keep the sensor magnet in point bearing contact during rotation further minimizing angle error.06-21-2012
20120025812POSITION ENCODER APPARATUS - A scanning device for a position encoder is provided that comprises a plurality of sensor elements for generating a plurality of sensor signals. A summation unit is also provided for generating at least a first summation signal and a second summation signal that provide information on the relative alignment of the scanning device and an associated scale. The first summation signal is generated from a first subset of the plurality of sensor signals and the second summation signal is generated from a second subset of the plurality of sensor signals. The plurality of sensor elements are substantially evenly spaced apart from one another N and sensor elements are provided per period of an associated scale, wherein N is an integer value and a multiple of three and four. In this manner, the third harmonic contribution to the summation signals is suppressed.02-02-2012
20120153939MAGNETIC FIELD MEASURING DEVICE - A magnetic field measuring device includes a support base, a measuring mechanism, and a displacement sensor. The measuring mechanism is positioned on the support base, and includes a mounting plate, a swing arm, a connecting member, an elastic member, and a measuring magnet. The mounting plate is connected to the support base. The swing arm is rotatably positioned on the mounting plate. The elastic member is positioned between the connecting member and the swing arm. The measuring magnet is connected to the swing arm, opposite to the support base. The displacement sensor is positioned on the support base, opposite to the swing arm.06-21-2012
20110084691ROTATION DETECTOR - A rotation detector includes a first distance sensor disposed to face a rotating body with a gear portion formed non-parallel to a rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body, a second distance sensor disposed at a position different from the first distance sensor in a direction of the rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body, and an axis shift detecting portion for detecting an axis shift of the rotation axis based on a variation in the distance measured by at least one of the first and second distance sensors.04-14-2011
20110089936MULTI-TURN SENSOR - A multi-turn angular position sensor a main gear configured to couple to and rotate, in response to rotation of a rotation member, over a main gear rotation range, a first sensor gear engaged with the main gear and configured to experience more angular rotation than the main gear in response to rotation of the main gear, and a second sensor gear engaged with the main gear and configured to experience more angular rotation than the main gear and less angular rotation than the first sensor gear in response to rotation of the main gear. The angular position sensor also includes a first angular position sensor configured to sense rotation of the first sensor gear and to generate a first output signal indicative of rotation of the first sensor gear, and a second angular position sensor configured to sense rotation of the second sensor gear and to generate a second output signal indicative of rotation of the second sensor gear. The main gear and the first and second sensor gears are configured such that a difference in a number of 360 degree revolutions experienced by the first sensor gear and the second sensor gear will be one 360 degree revolution or less in response to the main gear rotating through an expected full main gear rotation range greater than 360 degrees. The angular position sensor further includes a processor configured to receive the first and second output signals, determine a difference between rotation of the first sensor gear and rotation, of the second sensor gear based on the first and second outputs, determine an overall angular rotation of the first or second sensor gear from an initial angular position of the first or second sensor gear based on the difference and a present angular position of the first or second sensor gear, respectively, and determine an angular position of the main gear based on the overall angular rotation of the first or second sensor gear.04-21-2011
20120119730AXIS AXIAL POSITION MEASUREMENT SYSTEM - Axis axial position measurement system uses the electric signal generated by one or more sensors at the passage of teeth of a cogwheel fixed on the axis. The cogwheel is cut with at least one group of teeth, including at least three types of teeth of different height: a first type of teeth (05-17-2012
20100289487MAGNETIC ENCODER - A magnetic encoder is provided for use in a wheel bearing that forms a pulse train by means of a magnetic force and generates a code. The magnetic encoder is obtained by radially magnetizing a magnetic rubber ring with alternate S poles and N poles, wherein the magnetic rubber ring is formed by vulcanizing and adhering a magnetic rubber base, in which unvulcanized rubber and rare earth magnetic powder are mixed, to a reinforcement ring.11-18-2010
20100289486DEVICE FOR THE DETECTION OF AN ACTUATION ANGLE OF AN ELEMENT ROTATABLE ABOUT A SHAFT - A device for detecting an actuation angle of an element rotatable or pivotable about a shaft of the mentioned type. The device includes a sensor unit configured to emit an electrical signal depending on an angle of rotation and including an annular permanent magnet non-movably connected to the rotatable or pivotable element. The sensor includes a stationary Hall sensor array having two or more Hall sensors disposed at an angular distance about the annular permanent magnet, wherein an individual Hall sensor located in a linear zone defined by the movement of the rotatable or pivotable element is selected by a microcontroller according to a current position of the rotatable or pivotable element.11-18-2010
20100244816Resolver - A resolver comprises a first coil layer and a second coil layer each formed on a flat plate and an insulating layer formed between the first coil layer and the second coil layer. A SIN signal excitation coil includes a SIN first coil formed in the first coil layer and a SIN second coil formed in the second coil layer. A COS signal excitation coil includes a COS first coil formed in the first coil layer and a COS second coil formed in the second coil layer.09-30-2010
20100244817Resolver - A resolver includes an excitation coil, an excitation signal output circuit for outputting an excitation signal to the excitation coil, a search coil for receiving a magnetic field generated in the excitation coil, and an output signal processing circuit for processing a detection signal detected by the search coil. The resolver further includes a noise cancel circuit configured to previously detect noise from an output signal of the excitation signal output circuit and to output a cancel signal having an opposite phase to that of the noise to the output signal processing circuit.09-30-2010
20100207613NON-CONTACT SENSOR SYSTEM AND METHOD FOR DISPLACEMENT DETERMINATION - A non-contact sensor system is provided that comprises a first sensor element and a rotary member disposed proximate the first sensor element without physically contacting the first sensor element. The rotary member may be configured to be rotated about an axis Y by a shaft configured to pass through the rotary member along the axis Y at a value X. The non-contact sensor system further comprises a second sensor element disposed on the rotary member proximate the first sensor element without physically contacting the first sensor element, and the first sensor element and the second sensor element may be operatively coupled to facilitate sensing the value X.08-19-2010
20100207616Rotary Position Sensor - A sensor assembly for sensing a movable object which, in one embodiment, includes a housing defining an interior cavity. A rotor is retained in the cavity. The rotor defines a central bore and a magnet is mounted in an off-center pocket defined by the rotor. The rotor is coupled to the shaft of the movable object whose position is to be measured. A sensor is also retained in the cavity in a relationship at least partially overlying the magnet and adapted to sense at least the direction of the magnetic field generated by the magnet to generate an electrical signal indicative of the position of the movable object. In another embodiment, the rotor and sensor are mounted in separate interior housing cavities separated by an interior housing wall.08-19-2010
20100207614ELECTROMECHANICAL TRANSDUCER DEVICE - An electromechanical transducer device for a vehicle transmission or drive has a lever (08-19-2010
20090058404Rotation detection sensor - A rotation detection sensor for detecting both rotational position and direction of a rotating body with a gear includes a magnet, multiple magnetic sensors, a rotational position detection circuit, and a rotational direction detection circuit. The magnet produces a magnetic field directed to a gear tooth of the rotating body. When the rotating body rotates, the magnetic sensors output sensor signals shifted in phase from each other. The rotational position detection circuit performs a differential operation on the sensor signals received from at least two magnetic sensors and outputs a rotational position signal. The rotational direction detection circuit outputs a rotational direction signal based on the position signal and the sensor signal received from at least one of the at least two magnetic sensors.03-05-2009
20090058405ROTATION ANGLE SENSOR - A rotation angle sensor is provided with a shaft portion having a torsion bar, a rotation angle sensing portion for detecting rotation angle of the shaft portion, and a torque sensing portion for detecting angle of torsion of the torsion bar. The rotation angle sensing portion and the torque sensing portion improve their own detecting accuracies by using each other's detecting result, whereby the rotation angle sensor can detect rotation angle and angle of torsion of a multi-turn rotatable body with high accuracy and high resolution.03-05-2009
20090058403Magnetic encoder - A magnetic encoder constituting rotation detector in combination with a magnetic sensor, comprising a circular multipolar magnet and a metal reinforcing ring to which the circular multipolar magnet is fixed is disclosed.03-05-2009
20100052663SENSOR UNIT FOR A ROTARY ENCODER AND A ROTARY ENCODER EQUIPPED WITH SUCH A SENSOR UNIT - There is described a sensor unit (03-04-2010
20100052664MAGNETIC ROTATIONAL-ANGLE DETECTOR - The present invention provides a magnetic rotational-angle detector capable of detecting a position and a rotational angle of a rotating member with excellent accuracy. The magnetic rotational-angle detector includes device arrays (03-04-2010
20100052661Detection of the Onset of Switch Actuation via Magnetic Field - A magnet is affixed to a shaft or other pivoting or rotating member of a switch mechanism, on the axis of rotation. The radial position of the resulting magnetic field is monitored. A change in the magnetic field radial position, optionally in excess of a threshold, indicates the onset of switch actuation, prior to operative actuation of the switch mechanism. The radial position of the magnetic field is sensed by a magnetic rotary encoder. The detection of switch actuation onset may be used to remove current from a circuit prior to operative switch actuation. Because the magnet is rigidly affixed to the shaft, there is no lost motion. Because the shaft position and encoder are magnetically coupled, the detection mechanism contains no moving parts and no mechanical linkage or coupling, and its performance does not degrade due to shock, thermal effects, vibration, or wear.03-04-2010
20100052662ROLLING BEARING WITH A ROTATION SENSOR - The object is to protect the output cables of the magnetic sensor from damages and, at the same time, to make the process of drawing out the output cables easier.03-04-2010
20120176126ROTATION ANGLE SENSOR - A rotation angle sensor includes a magnet that rotates about a rotation axis. The magnet has an end face perpendicular to the rotation axis and has a magnetization in a direction perpendicular to the rotation axis. The rotation angle sensor further includes a magnetic sensor that faces the end face of the magnet and detects a magnetic field produced by the magnet. The magnet includes a plate-shaped portion including the end face, and a ring-shaped portion that is located on a side of the plate-shaped portion farther from the end face and coupled to the plate-shaped portion. The plate-shaped portion does not include any hollow through which the rotation axis passes, whereas the ring-shaped portion includes a hollow through which the rotation axis passes.07-12-2012
20100271014SYSTEM AND METHOD FOR MEASURING ROTATIONAL MOVEMENT OF A COMPONENT FROM REGIONS MAGNETIZED IN A MAGNETICALLY HARD LAYER OF THE COMPONENT - A position-sensing system magnetically senses the position of a piston rod moving with respect to a cylinder. A magnetically hard layer on the piston rod provides a recording medium. A track comprised of a plurality of magnetized regions is magnetized in the magnetically hard layer. A plurality of magnetic-field sensors is coupled to the cylinder in proximity of the magnetically hard layer to sense the magnetized track while the piston rod is moving with respect to the cylinder. A first one of the magnetic field sensors is positioned over the track to sense the magnetized regions of the track serially and a second one of the magnetic field sensors is positioned radially to one side of the track. The magnetic field sensors generate signals, in response to sensing the magnetized regions, for use in measuring rotational movement of the piston rod.10-28-2010
20090091317Contactless roration angle sensor - There is provided a rotation angle sensor which does not require resin and an O ring for sealing and is applicable to such a structure that a rotating body to be detected passes through a center portion. A waterproof surface on the main body side 04-09-2009
20100007340Angle detecting apparatus and angle detecting method - An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged opposite each other so as to output a first detection signal and a second detection signal, respectively, each of which contains information on the angle of rotation of the rotor, a differential operational circuit performing differential operation on the first detection signal and the second detection signal, and an angle calculating circuit calculating the angle of rotation of the rotating shaft based on the result of the differential operation by the differential operational circuit. Here, the distance between two points where a straight line passing through the center of rotation of the rotor crosses the outer periphery of the rotor is constant.01-14-2010
20090219017Tone Wheel and Method for Manufacturing The Same - A tone wheel constituting a rotation detection magnetic encoder in combination with a magnetic sensor fixed onto a stationary side member, the tone wheel comprising a metal reinforcing ring fitted in a rotary side member and a circular multipolar magnet fixed to the metal reinforcing ring. the circular multipolar magnet is made of a plastic magnet of a circular resin molded product which contains a magnetic powder therein and is magnetized with a number of S and N poles alternatively provided along its circumference. The metal reinforcing ring has a mating portion with which a part of the circular resin molded product mates. The circular resin molded product is a molded product integrally combined with the metal reinforcing ring in which a part of the circular resin molded product mates with the mating portion of the metal reinforcing ring, and is made by charging a melt resin material into a forming die in which the metal reinforcing ring is disposed and hardening the melt resin material. The metal reinforcing ring has at its edge a bent portion which is enwrapped with a part of the circular resin molded product, and the mating portion is provided at the bent portion.09-03-2009
20120313631ANGLE MEASUREMENT SYSTEM INCLUDING MAGNET WITH SUBSTANTIALLY SQUARE FACE FOR THROUGH-SHAFT APPLICATIONS - To make the magnetic field lines straighter and more parallel to one another, the present disclosure makes use of substantially square magnets with through-holes therein. It will be appreciated that “substantially square” magnets include magnets that are precisely square as well as magnets that are approximately square (e.g., have rounded corners or other small deviations from being square.) By providing straighter and more parallel magnetic field lines, such substantially square magnets tend to enable greater precision and accuracy when rotational angles of a shaft are measured.12-13-2012
20120223703SENSOR ARRANGEMENT - A sensor arrangement (09-06-2012
20090066325ROTATION ANGLE DETECTION DEVICE - A rotation angle detection device includes a rotary body rotating in linked motion with a steering wheel; a detector rotating in linked motion with the rotary body; a magnetic detection element placed on a wiring board and detecting magnetism of a magnet placed at the detector; a control part for detecting a rotation angle of the rotary body based on a detection signal from the magnetic detection element; and a holder latched onto the wiring board and rotatably holding the detector.03-12-2009
20120262160ASYMMETRIC VARIABLE RELUCTANCE (VR) TARGET FOR MULTI-DIMENSIONAL MONITORING - A system is provided for dynamically determining an axial position of a rotating member. The system includes a target component on a circumferential periphery of the rotating member, the target component having a longitudinally asymmetric shape. The system further includes a sensor assembly fixedly positioned relative to the target component. The sensor assembly detects and outputs a plurality of signals having different positive pulse widths, as the target component moves axially past the sensor. The system further includes a circuit coupled to the sensor assembly and receiving the plurality of signals. The circuit determines an axial position of the target component for each of the plurality of signals based on a comparison of the different positive pulse widths.10-18-2012
20120262162Bidirectional Magnetic Position Sensor Having Field Rotation - The disclosure relates to a magnetic position sensor in at least two directions, the sensor including at least one magnetized element and a probe including at least two magneto-sensitive elements located substantially on the same point and each measuring one of the components of the magnetic field generated by the magnetized element, the magnetized element being movable relative to the magneto-sensitive elements. The probe includes at least one processing circuit capable of carrying out angle and module calculations on the basis of algebraic combinations of the components of the magnetic field and providing at least two independent signals representing the position of the movable element along, respectively, one and the other of the two directions. According to the disclosure, the magnetization vector of the magnetized element is variable in relation to the normal vector on the surface of the magnetized element that is placed opposite the probe in at least one of the dimensions of the magnetized element so as to define a single position of the probe in relation to the magnetized element.10-18-2012
20120229126ROTATION ANGLE DETECTION DEVICE - When the zero-crossing of one of the output signals of magnetic sensors has been detected, a rotation angle computing device identifies a magnetic pole sensed by the first magnetic sensor based on the other two output signals. Subsequently, the rotation angle computing device identifies the magnetic pole sensed by the second magnetic sensor and the magnetic pole sensed by the third magnetic sensor based on the magnetic pole sensed by the first magnetic sensor. After that, the rotation angle computing device corrects the amplitude of the output signal of each magnetic sensor based on the identified magnetic poles respectively sensed by the magnetic sensors. Then, the rotation angle computing device computes the electric angle θe of the rotor based on the corrected output signals.09-13-2012
20120299586MAGNETIC POSITION SENSOR ASSEMBLY FOR MEASUREMENT OF ROTATIONAL ANGULAR POSITION OF A ROTATING STRUCTURE - A magnetic rotational position sensor assembly for measurement of a rotational angular position of a rotating structure. The sensor assembly includes a shaft member extending along a primary rotational axis for primary rotational movement in response to rotation of the rotating structure, a motion conversion member structured and configured to transform the primary rotational movement of the shaft member into secondary movement, a magnet member secured to the motion conversion member for displacement along a travel path in response to the converted secondary movement of the motion conversion member, and a non-contact magnetic sensor that senses a change in position of the magnet member by sensing a corresponding variation in the magnetic field during displacement of the magnet member along the travel path in response to rotation of the rotating structure, wherein the magnetic sensor generates an output signal representative of a relative rotational angular position of the rotating structure.11-29-2012
20120229127MAGNETIC ABSOLUTE ENCODER AND MOTOR - A magnetic absolute encoder includes: a board-holding assembly mounted to a motor case assembly side; and a flexible printed wiring board which is held, by the board-holding assembly, in the shape of a loop surrounding multipolar and bipolar ring magnets. On the flexible printed wiring board, multipolar-side hall elements and bipolar-side hall elements are mounted and a wiring pattern relating to the hall elements are printed. The assembling work and wiring work of the magnetic absolute encoder provided with a multipolar magnetic encoder and a bipolar magnetic encoder can be performed simply in a short time.09-13-2012
20120229125IRON CORE MEMBER OF A RESOLVER - An iron core member of a resolver, which is a one-piece member integrally formed of iron powder. The iron core member includes an annular core section and multiple pole sections annularly arranged on outer circumference of the core section at equal intervals and projecting from the outer circumference of the core section. Each pole section has recessed sections. Enameled wires can be conveniently wound around the recessed sections to form coils located in the recessed sections. The pole section further has multiple projection posts. After the winding process is completed, the terminals of the enameled wires are hooked and located on the projection posts. In comparison with the conventional iron core member, the present iron core member has lower iron loss and the manufacturing process is simplified.09-13-2012
20120229124FIXING STRUCTURE FOR SIGNAL WIRES OF A RESOLVER - A fixing structure for signal wires of a resolver is disposable on an end face of a stator of the resolver. The fixing structure includes a circuit board, a fixing section disposed on the circuit board for connecting the circuit board to the end face of the stator, a connection terminal seat disposed on the circuit board, multiple connection sections formed through the circuit board in the form of holes, and multiple bridge circuits respectively arranged between the corresponding connection sections and the connection terminal seat for bridging the corresponding connection sections and the connection terminal seat.09-13-2012
20090096445Method and device for determining angular position - A method for determining angular position, which removes a systematic error in the angular position determination and requires a low calculating effort, by determining a first factor and a second factor as a function of an angular position, forming a first product from a first signal and the first factor, and a second product of the second signal and the second factor, forming a subtraction result by the subtraction of the second product from the first product, and comparing the subtraction result to a quantity.04-16-2009
20110121825METHODS AND APPARATUS FOR AN ANALOG ROTATIONAL SENSOR HAVING MAGNETIC SENSOR ELEMENTS - A sensor includes a magnetic position sensing element to generate angular position information, a first signal generator, a second signal generator, a first inverter to invert the first waveform for providing a first inverted waveform and a second inverter to invert the second waveform for providing a second inverted waveform, wherein the first and second waveforms are inverted about an offset voltage, and an analog signal processing module to generate a linear output signal from the first waveform, the second waveform, the first inverted waveform, and the second inverted waveform.05-26-2011
20100327857ANGLE SENSOR, ANGLE SENSOR MANUFACTURING METHOD, AND ANGLE DETECTION DEVICE USING THE ANGLE SENSOR - There is provided an angle sensor and angle detection device of high output and high accuracy with a wide operating temperature range. First through eighth sensor units 12-30-2010
20080297147SENSOR DEVICE - A sensor device for detecting a relative movement including a transmitter unit configured to generate a field. The transmitter unit includes first transmitter elements and second transmitter elements, wherein the first transmitter elements and the second transmitter elements, configured to generate a spatially varying field, are arranged alternately one behind another along a line at predetermined positions, and at a reference position, which corresponds to at least one of the predetermined positions of a first or second transmitter element along the line, at least one value of the field is altered by a positive factor with respect to a corresponding other position of a first or second transmitter element. Furthermore, a pick-up unit is configured to generate an alternating output signal depending on the field generated by the first and second transmitter elements, wherein the transmitter unit and the pick-up unit can be moved relative to one another.12-04-2008
20080297146COMPONENT FOR INPUT OPERATION - A left-side ring magnet and a right-side ring magnet are fastened to a roller-shaped operation part, circumferentially displaced from each other by a certain angle. Magnetic variation generated by rotation of the magnets is detected by a magnetism detection element. Additionally, a left-side stationary magnet and a right-side stationary magnet, with the same magnetic pole, are annexed correspondingly to the left-side ring magnet and the right-side ring magnet, respectively, so that the stationary magnets are arranged with the same proximal arrangement relative to the ring magnets, respectively. With such a structure, two attractive and repulsive forces between the left-side ring magnet and the left-side stationary magnet; and between the right-side ring magnet and the right-side stationary magnet are totally exerted on the operation part, thereby providing a sharp, clear click touch during rotation.12-04-2008
20090066324Angular position detector and rotary electric device drive unit including the same - The invention provides an angular position detector that can be configured at low cost and that accurately detects the angular position of a rotor in a rotary electric device and permits reliable control thereof even when the rotary electric device runs at a high speed. The angular position detector includes a resolver that outputs a signal indicating the rotational angle of the rotor and a signal processing circuit that calculates the rotational angle of the rotor based on the signal output from the resolver. The signal processing circuit samples output signals from the resolver at predetermined intervals and converts the signal into a digital signal. By calculating the angular speed according to the digital signal output from the resolver, the computation process is simpler, and can be performed using a microcomputer with less processing power, which reduces the component costs for the angular position detector.03-12-2009
20120262161VARIABLE RELUCTANCE RESOLVER - A VR resolver comprises a resolver stator and a resolver rotor. Teeth whose number is equal to the product of an integer P of 2 or more and 4 are arranged in an annular shape from the inner circumferential side to the inner side in the diameter direction of the resolver stator. In the resolver rotor, convex portions whose number is equal to the product of an odd number m of 3 or more and the integer P are radially projected. All the stator slots are provided with excitation coils which generate a magnetic field by the application of a voltage. Moreover, all the stator slots are provided with either a first coil or a second coil which outputs electric signals of different waveforms based on the magnetic field.10-18-2012
20120319680ROTATION ANGLE DETECTION DEVICE - Upon detecting a peak value from output signals of one of either a first or a second magnetic sensor, an rotation angle computation device identifies, on basis of an amplitude compensation table corresponding to the one magnetic sensor for which the peak value was detected, a pole number of a magnetic pole sensed by the magnetic sensor. Then, based on the identified pole number and a magnetic pole identification table, a pole number of a magnetic pole sensed by the other magnetic sensor is identified. The pole numbers of the magnetic poles sensed by the respective magnetic sensors are thus identified, and the rotation angle computation device compensates the output signals of the respective magnetic sensors using amplitude compensation gains corresponding to the sensed magnetic poles (magnetic pole pair).12-20-2012
20110037459ROTATION-ANGLE-DETECTING APPARATUS - A rotation-angle-detecting apparatus comprising a magnet rotor, a magnetic sensor detecting the direction of magnetic flux from the magnet rotor, a correction circuit, and an angle-calculating circuit, the magnetic sensor having bridge circuits X and Y each comprising four connected magnetoresistive devices, each magnetoresistive device comprising a spin-valve, giant-magnetoresistive film, the correction circuit calculating difference (Vx−Vy) and sum (Vx+Vy) from the output voltage Vx of the bridge circuit X and the output voltage Vy of the bridge circuit Y, and making their amplitudes equal to each other, and the angle-calculating circuit determining the rotation angle of the rotor by arctangent calculation from a signal (Vx−Vy)′ and a signal (Vx+Vy)′ supplied with the same amplitude from the correction circuit.02-17-2011
20120326709METHOD FOR A MEASURING INSTRUMENT - A method for a measuring instrument is disclosed, for separating the angular deviation of a rotational axis of an instrument body from a corresponding true rotational axis due to imperfections in at least one rolling-element bearing effectuating the rotational mounting of the instrument body into different parts corresponding to type of imperfection. The method comprises detecting rotary position of the at least one rolling-element bearing, and determining angular deviation of the rotational axis from the corresponding true rotational axis in a plurality of rotational positions of the instrument body, wherein the instrument body is rotated a plurality of successive full or partial revolutions about the rotational axis. There is also disclosed a measuring system and a measuring instrument to be used in such a measuring system.12-27-2012
20120268111ROTATION ANGLE SENSOR - A rotation angle sensor includes a housing, a detected object, a magnetism generation section, a housing cover, a circuit substrate, a sensing IC, and a resin body. The sensing IC includes a magnetism detection element, a molded body, and leads. The magnetism detection element outputs a signal in accordance with a change in a magnetic field due to a rotation of the detected object. The molded body covers the magnetism detection element. One end portion of each lead is electrically coupled with the magnetism detection element and the other end portion of each lead protrudes from the molded body and is electrically coupled with the circuit substrate. The resin body seals a portion of the molded body located between the magnetism detection element and the housing cover, the leads, and the circuit substrate.10-25-2012
20110043197Method and Device for Contactless Sensing Rotation and Angular Position Using Orientation Tracking - 1. Method and device for contactless sensing rotation and angular position using orientation tracking. 2.1 To improve the accuracy and possible resolution of a magnetic positioning system, a method and a device using a special tracking technique is proposed. 2.2. The method and the device are using multiple magnetic field sensing elements at different positions below a magnetic target. The sensed signals are used to select or combine the sensing elements for a best approach to the actual orientation of the magnet. This allows putting out the related orientation of the approach as a coarse value and the remaining displacement as a fine value. 2.3. A device using this method allows highly accurate measurement of angular positions controlling or tolerating the placement of a magnet as the input source.02-24-2011
20110210722INTEGRATED MAGNETIC SENSOR FOR DETECTING HORIZONTAL MAGNETIC FIELDS AND MANUFACTURING PROCESS THEREOF - The integrated magnetic sensor for detecting an external magnetic field, is formed by a body of semiconductor material having a surface; an insulating layer covering the body of semiconductor material; a magnetically sensitive region, for example a Hall cell, extending inside the body; and a concentrator of ferromagnetic material, extending on the Hall cell and having a planar portion extending parallel to the surface of the substrate on the insulating layer. The concentrator terminates with a tip protruding peripherally from, and transversely to, the planar portion toward the Hall cell. When the magnetically sensitive region is a sensing coil of a fluxgate sensor, it is formed on the substrate, embedded in the insulating layer, and the tip of the concentrator can reach as far as the sensing coil.09-01-2011
20100231206INDUCTION DETECTING TYPE ROTARY ENCODER - An induction detecting type rotary encoder includes: a stator; a rotor configured to be rotated with respect to a rotary shaft; a first transmitting coil; a second transmitting coil; a first receiving coil; a second receiving coil; a first magnetic flux coupling body; and a second magnetic flux coupling body. The first transmitting coil is disposed between the first and second receiving coils. A distance between the second transmitting coil and the rotary shaft is larger than that of the second receiving coil and the rotary shaft. The first magnetic flux coupling body forms a first track for causing a periodic change for each rotation. The second magnetic flux coupling body forms a second track for causing a periodic change for each rotation. The second magnetic flux coupling body has a pattern of which an inner peripheral side is substantially continuous in a circumferential direction.09-16-2010
20110241658Determining the rotor angle of a synchronous machine at standstill with the aid of iterative test pulses - A method for determining the angular position of a synchronous machine having a magnetically anisotropic rotor includes an (m) iteration stage and an (n) iteration stage. The (m) iteration stage encompasses: generating an (m) magnetic field of an (m) angular direction and acquiring an (m) peak value of the current pulse generated by the (m) voltage pulse; and providing at least two further (m+i) peak values in different (m+i) angular directions that differ from the (m) angular direction. The (n) iteration stage includes: ascertaining the angular directions (n) and (n+1) in which the two highest or the two lowest peak values from a peak value group occur; and providing an (n) angular direction, which resides between the (n+1) angular direction and the (n+2) angular direction, as an angular position output.10-06-2011
20120286774APPARATUS AND METHOD FOR DETERMINING STEERING ANGLE - A steering angle sensor having a first part engaged to and rotatable with a steering system and a second part providing a code. The second part immovably engages the steering system and the first part rotates about the second part to scan the code. An electrical connection between the steering system and the second part transmits an output signal upon the first part scanning the code, the output signal being representative of a steering angle.11-15-2012
20100207617Magnetic encoder and reference mark applicator - A magnetic encoder scale comprises a series of periodically spaced magnetic marks. A reference mark is applied to the scale using an applicator or template, which has a feature for locating the reference mark. The applicator or template comprises one or more magnetic marks corresponding to the periodic scale marks, whereby the applicator or template automatically assumes a defined phase relationship relative to the periodic scale marks when placed on the scale. The reference mark may be attached to the scale self-adhesively. Or it may be formed by removal of material from the scale, guided by the applicator or template. Or the applicator may comprise a strong permanent magnet which applies further magnetisation to a region of the scale.08-19-2010
20100181997METHODS AND APPARATUS FOR AN ANALOG ROTATIONAL SENSOR HAVING MAGNETIC SENSOR ELEMENTS - A sensor includes a signal generation module including a magnetic sensor to provide position information for generating first and second waveforms corresponding to the position information. An analog signal processing module provides an algebraic manipulation of a subset of the first waveform, the second waveform, a first inverted waveform, and a second inverted waveform, to generate a linear output signal.07-22-2010
20100176806Absolute Position Sensing - To determine the relative position of movable portions of an assembly, a first magnetic device is coupled to a first portion of the assembly. The first magnetic device has a sensing surface with a number of magnetic poles that provide a magnetization state transition location. An absolute position sensor with a two-state output is coupled to the assembly adjacent the first magnetic device. The output state changes when a magnetization state transition of the first magnetic device moves past the absolute position sensor. A second magnetic device is coupled to the assembly. The second magnetic device creates a cyclically-varying magnetic field proximate its sensing surface. An incremental position sensor is coupled to the assembly adjacent the second magnetic device, and has an output that varies continuously relative to magnetic field angle over at least a portion of one cycle of the cyclically-varying magnetic field of the second magnetic device.07-15-2010
20120139533ANGLE OF ROTATION DETECTION DEVICE - An angle of rotation detection device includes an electrical angle detector (resolver and R/D converter) having the electrical angle of 360° set smaller than the mechanical angle of 360°, and providing a two-phase encoder signal corresponding to the electrical angle of a rotor; a two-phase encoder counter counting a two-phase encoder signal, and providing a digital value corresponding to the electrical angle, and a multiplication factor detector detecting which position of the mechanical angle the electrical angle indicated by the signal output from the detector corresponds to, based on a change of the count value from the two-phase encoder counter. Thus, there can be provided an angle of rotation detection device that can identify the position of the mechanical angle while using the two-phase encoder output.06-07-2012
20130015846MAGNETIC ROTARY ENCODERAANM Mehnert; WalterAACI OttobrunnAACO DEAAGP Mehnert; Walter Ottobrunn DEAANM Theil; ThomasAACI FeldafingAACO DEAAGP Theil; Thomas Feldafing DE - A magnetic rotary encoder for the fine resolution of the rotational angle of a shaft (01-17-2013
20110140690DEVICE FOR PILOTING AN AIRCRAFT HAVING OFF-AXIS MAGNETIC-FIELD-SENSITIVE ELEMENTS FOR DETECTING ANGULAR POSITION - The invention relates to a device for piloting an aircraft, having at least one piloting member which is movable about at least one axis of rotation equipped with at least one contactless angular position sensor including a stator assembly and a rotor assembly which are movable in relation to one another about an axis of rotation, at least one magnetic-field-sensitive element which is radially offset in relation to the axis of rotation, interlinked on one of the assemblies and placed opposite the magnetic structure interlinked on the other of the assemblies, and comprises: 06-16-2011
20130021025STATIONARY MAGNET VARIABLE RELUCTANCE MAGNETIC SENSORS - A position sensor for sensing whether a rotatable element is in at least a first rotational position or a second rotational position is provided. A rotor is configured to be coupled to the rotatable element for rotation therewith, and is constructed at least partially of a magnetically permeable material and includes a first rotor pole. A stator is non-rotationally mounted, is constructed at least partially of a magnetically permeable material, is spaced apart from the rotor, and comprises a first main pole and a first stealer pole. The first main pole and the first stealer pole are spaced radially apart from each other. A magnet is non-rotationally disposed adjacent to the stator and is spaced apart from the rotor. A first magnetic sensor is non-rotationally mounted between the stator and the rotor, is disposed adjacent the first main pole, and is radially offset from the first stealer pole.01-24-2013
20120242330FAIL DETECTING DEVICE FOR ROTATION ANGLE SENSOR - A fail detecting device for a rotation angle sensor, for detecting a fail of the rotation angle sensor even if the number of rotation angle sensors is one. A cam is configured to be driven to rotate in one direction by an electric motor to reciprocate a push rod. An output voltage of an angle sensor is set so that the region equal to or lower than a first predetermined voltage and the region equal to or higher than a second predetermined voltage higher than the first predetermined voltage are recognized as a dead zone. The elapsed time after the transition to the dead zone is measured by a timer and it is determined that the angle sensor is in the fail state if the output voltage corresponding to the dead zone is detected although the estimated time of the passage through the dead zone has elapsed.09-27-2012
20080231266ABSOLUTE ENCODER - A printed circuit board on which are laid out detection windings and an excitation magnetic flux detection winding formed of conductor patterns is disposed so as to be spaced a predetermined gap quantity from a binary cyclic random number sequence code plate which is rotatably disposed. A U-shaped exciting core on which an excitation winding is wound is disposed on the back surface side of the printed circuit board. The detection windings detect and output, as voltage values, reluctance changes as which excitation magnetic fluxes generated from the excitation winding fluctuate between this excitation winding and the concave/convex portion of the binary cyclic random number sequence code plate. Reduction of precision due to interferences between the excitation magnetic fluxes for detecting an absolute code and other excitation magnetic flux is thereby prevented.09-25-2008
20130169270MAGNETIC MULTI-TURN ABSOLUTE POSITION DETECTION DEVICE - The disclosure relates to a magnetic device for detecting the absolute position of an input shaft capable of rotating more than 360°, the device including a main magnetic sensor, a motion reducer, and a secondary magnetic sensor, wherein the main magnetic sensor is connected to a rotor, measures the rotation of the shaft for ranges of angles of less than 360°, and includes a main magnet, the motion reducer converts the rotation of the shaft into a reduced rotation, the maximum amplitude of which is equal to no more than 360°, and the secondary magnetic sensor measures the reduced rotation and includes a secondary magnet. According to the disclosure, the secondary magnet is arranged between the upper and lower planes of the main rotor, and the main magnet has P pairs of poles, where P is greater than 1.07-04-2013
20080224693ABNORMALITY DETECTION APPARATUS FOR ROTARY TYPE ABSOLUTE ENCODER - In order to cope with many rotor diameters using a single type of stator portion, two stator portions, each having a built-in signal processing circuit for detecting absolute positions independently, are disposed in opposition at positions which differ from each other with respect to a rotational center of a rotor portion. When one of the stator portions receives a request command RX from an external device, it transmits a detected serial communication signal. The other stator portion receives the transmitted serial communication signal, determines a position detection abnormality, and notifies the abnormality to the external device when a difference between the received absolute position and the absolute position detected by the other stator portion exceeds a deviation previously set for 180 degrees.09-18-2008
20130176020MEASURING ROTATION AND TILT OF A WHEEL ON AN INPUT DEVICE - Embodiments of the present invention include a roller for an input device, where the roller's absolute angular position is measured by a magnetic encoder. A magnet is attached to the roller, possibly inside the roller so as to make the embodiment more compact. In one embodiment, the magnetization is simple and low cost. Further, tight tolerances are not required, and such a system is easy to manufacture. In one embodiment, the sensor is covered by any non-ferromagnetic material, to protect it from foreign particles, and to reduce ESD. In one embodiment, the wheel consumes much less power than conventional wheels in input devices. In one embodiment, the tilting of the wheel is measured using the same sensor that is used for measuring the rotation of the wheel. In one embodiment, a ratcheting feel provided to the user when rotating the wheel is synchronized with the rotation signal.07-11-2013
20130141086ROTATION DETECTION DEVICE AND MANUFACTURING METHOD FOR THE SAME - A rotation detector component detects a rotational state of a rotor and sends a rotational detection signal. A signal transmission component is electrically connected with a lead frame of the rotation detector component to transmit the rotational detection signal to an external device. A body portion holds the rotation detector component and a part of the signal transmission component. The body portion is integrally molded of a first resin to cover a joint portion between the lead frame and the signal transmission component, the rotation detector component, and a part of the signal transmission component. A part of the rotation detector component forms an exposed portion exposed from the body portion.06-06-2013
20110273169MAGNETIC SENSOR WITH HIGH AND LOW RESOLUTION TRACKS - A sensing apparatus includes high and low-resolution tracks, and a compensation track. The low-resolution track includes a first magnet that has a first magnetic field. The high-resolution track is spaced apart from the low-resolution track by a first gap and includes a second magnet and a third magnet. The second magnet has a second magnetic field that is substantially identical to the first magnetic field, and the third magnet has a third magnetic field that is substantially opposite to the first magnetic field. The compensation track is spaced apart from the high-resolution track by a second gap and includes a fourth magnet having a fourth magnetic field that is substantially opposite to the first magnetic field and configured to reduce a magnetic field from the first magnet that is superimposed on the second and third magnets.11-10-2011
20110273168POSITION DETERMINATION OF AN ELECTRIC DRIVE HAVING TWO STATORS AND TWO ROTORS - Disclosed is an electric drive, particularly for a pivoting arm, such as a robotic arm, comprising a rotor, a plurality of magnetic periods and a device for determining the rotational position of the rotor based on at least one measurement signal, which is indicative of the inductance of a pole winding strand that is dependent on the position of the pole winding strand relative to the magnetic periods. The electric drive according to the invention that solves this problem in that two coupled rotor parts, which can be jointly rotated at a rotational angle ratio in relation to each other that is fixed, and assemblies comprising magnetic periods and pole winding strands are provided, the assemblies being separate for the rotor parts, wherein the numbers of the magnetic periods for each rotor part are co-prime, and the device for determining the rotational position of the rotor is provided for determining the position from the measurement signals for the two rotor parts.11-10-2011
20110273167PAPER POSITION SENSOR FOR PRINTER - A paper position sensor for a ticket printer is disclosed. The ticket printer includes a blank ticket tray and a paper guide consisting of an upper and lower guide, which lower guide contains a position sensor wheel that rotates as a result of the frictional contact with the blank ticket, as the ticket passes over the sensor wheel on its way through the guides. The wheel contains an embedded magnetic element such that as the wheel turns, which magnetically provides rotational position information to an adjacently-mounted sensor chip, which is able to determine, magnetically, the position of the wheel. The sensor chip provides data to the printer control as to the position of the ticket through the printer, and thus the printer control is now able to determine the precise position of the ticket in the printer.11-10-2011
20120249129DEVICE FOR DETERMINING THE ANGULAR POSITION OF A PIVOTABLE COMPRESSOR GUIDE VANE - A device for determining the angular position of a compressor guide vane pivotable about the longitudinal axis thereof disposed in a compressor, associated with a synchronously rotating, flat measuring surface is provided. In order to allow particularly reliable, simple, and nearly error-free detection of the angular positions by means of a robust device, the angular position of the compressor guide vane rotatable about the longitudinal axis thereof is semi-automatically determined by means of the device. To this end, the device includes at least one mounting unit for temporarily fastening the device in alignment on the compressor, and a measuring unit including an angle measuring device having a rotary plate rotatable about the rotary axis, on which rotary plate a vertically protruding measuring arm extending parallel to the rotary axis is provided for making planar contact, via the free end thereof, with the measuring surface.10-04-2012
20130113471ROTATION ANGLE DETECTION DEVICE AND TORQUE SENSOR - A torque sensor computes a steering torque applied to a steering wheel on the basis of a difference between a rotation angle of an input shaft, which is detected using a first resolver, and a rotation angle of a lower shaft, which is detected using a second resolver. A planetary gear mechanism that includes a sun gear that rotates together with the input shaft, a planetary gear that is made of a magnetic material and that revolves around the sun gear and an internal gear that is in mesh with the planetary gear is provided. A rotation angle of the input shaft and a position of the planetary gear are detected on the basis of voltage signals output from the first resolver, and a steering angle of the steering wheel is obtained on the basis of the detected rotation angle and the detected position.05-09-2013
20130113470ROLLER BEARING ARRANGEMENT WITH AN ANGLE SENSOR - A roller bearing configuration having an angle sensor includes a roller bearing. The Angle sensor an absolute encoder with a sensor ring connected in a rotationally fixed manner to one of the bearing rings of the roller bearing, and a measuring element connected in a rotationally fixed manner to the second bearing ring, wherein coils, namely at least one transmitting coil and at least one receiving coil, are situated on the sensor ring, and the transmitting coil has an axis of symmetry, which is identical to the axis of rotation and is situated in an annular metallic pot core, which has a U-shaped cross section and is concentric with the axis of rotation of the roller bearing, and a receiving coil is situated partially inside and partially outside of the pot core.05-09-2013
20130093415Angle Sensor - An angle sensor for sensing angular position of a rotatable shaft includes a drive gear, a measuring gear, and a sensor housing. The drive gear is connected to the shaft. The measuring gear is driven by the drive gear. The angular position of the shaft can be determined from an angular position of the measuring gear. The sensor housing has a bearing for the drive gear. The drive gear and the measuring gear are rotationally mounted about respective axes of rotation in the sensor housing with the drive gear being inside the bearing. The drive gear is forcibly pressed into a radial position inside the bearing by at least one spring.04-18-2013
20130127451VARIABLE RELUCTANCE RESOLVER - The present invention relates to a resolver of an electric driving motor for vehicle which comprises a rotor, a stator comprising a stator main body which encircles the rotor and teeth which extend from the stator main body to be wound by a coil, a terminal module comprising a terminal end which contacts the coil for an electric connection and a terminal main body which supports the terminal end, and a connector module comprising a connector main body which is detachably coupled to the terminal main body and a lead line which is connected to an outer device and supported by the connector main body and which contacts the terminal end for an electric connection if the connector main body is coupled to the terminal main body, thus simplifying manufacturing process and repairing process and reducing cost.05-23-2013
20130141087MAGNETIC ENCODER HAVING THIN DETECTION SURFACE - A magnetic encoder including an object to be detected, a casing opposite to the object, a magnet and a magnetic sensor accommodated in the casing is provided. The casing of the magnetic encoder has an opposite wall opposite to the object. The opposite wall has a thickened portion and a thin portion integrally formed with the thickened portion. The thin portion has a smaller thickness than the thickened portion. The magnetic sensor is situated at the thin portion.06-06-2013
20110215797MAGNET ASSEMBLY - In order to amplify a use field of a position giving magnet of a magnetic field sensitive sensor and in order to reduce the scatter field, a magnetic interconnection made from plural magnets preferably arranged in longitudinal direction behind one another is being used, wherein the pole orientations of the magnets differ from one another and are arranged in particular symmetrical to the center element.09-08-2011
20080197838ROTARY ENCODER AND METHOD FOR ITS OPERATION - A rotary encoder includes a first group of components and a second group of components. The first group of components has a pulse wire, a detector, and a circuit configuration. The second group of components has a magnet and a code element. Upon approach of the magnet to the pulse wire, a voltage pulse is able to be generated by the pulse wire. A signal is able to be generated by the detector as a function of the relative position, and based on the signal, a logic circuit is able to ascertain position information which is able to be stored in a non-volatile memory. Triggered by the voltage pulse, a voltage from a voltage source is able to be applied to the circuit configuration. The circuit configuration is disconnectable again from the voltage source at the latest after the storage of the position information in the memory.08-21-2008
20130147469ROTATION ANGLE DETECTION DEVICE - The present invention relates to a rotation angle detection device mainly used for rotation angle detection of a steering wheel of an automobile and the like.06-13-2013
20090051354PULSAR RING FOR MAGNETIC ENCODER - A pulsar ring for a magnetic encoder comprises an annular holder attached to an outer periphery of a rotary side member, and a pulsar main body made of a rubber-like elastic material mixed with magnetic powder, magnetized to have multiple poles, and adhered integrally to the holder, wherein a plurality of notches are formed at predetermined intervals in a circumferential direction on a peripheral edge of the holder, and the pulsar main body is adhered to the holder so that a peripheral edge of the pulsar main body covers the peripheral edge including the notches of the holder, thereby to improve adhesive strength between the annular holder and pulsar main body.02-26-2009
20110234211ANGLE POSITION SENSOR - The present invention discloses an angular position sensor, which includes a rotor core as well as a stator core coaxially around this rotor core. Between the rotor core and the stator core is a first air gap, and inside the rotor core a second air gap, which is provided inside with a hard magnet. The stator core has a third air gap inside, which is provided inside with a magnetic flux sensing element. It is obvious that the present invention, by substituting the combination of the hard magnet and the rotor core for the design of ring magnet in the prior art, obtains the good linearity within a wider range.09-29-2011
20100315075Resolver of phase difference type - A phase difference type resolver is adapted such that a calculator calculates an angle from a phase difference at a detection-signal zero cross point, determines a velocity at the angle based on an angle calculated from a phase difference at a previous detection-signal zero cross point, calculates an estimated angle at a next detection-signal zero cross point based on the velocity, divides a difference between the estimated angle and the angle into predetermined minimum detection angles, and outputs a real-time signal based on the minimum detection angles in a range after the angle but before the estimated angle.12-16-2010
20100315074ROTATION ANGLE DETECTOR - A rotation angle detector, comprises a magnet having at least a top surface, a bottom surface and a peripheral surface, that is fixed at a detectable rotation body and the same is rotated as integral therewith, a magnetic detecting unit for detecting a strength of a magnetism for the magnet, that is arranged at a peripheral corner part as in vicinity thereof to be formed with the top surface or the bottom surface and with the peripheral surface of the magnet and an arithmetic processing unit for calculating a rotation angle of the detectable rotation body with using an output of the magnetic detecting unit. A part to be formed by removing a part of the peripheral corner part as all around thereof forms a connecting face to correspond between the top surface or the bottom surface and the peripheral surface, and the magnetic detecting unit is arranged at the connecting face as in vicinity thereof.12-16-2010
20100315073MAGNETIC ENCODER APPARATUS AND MANUFACTURING METHOD THEREFOR - Provided are a magnetic encoder apparatus, which can accurately perform angle detection, wherein at very accurate positions, magnetic field detection elements are mounted on a fixed member, and wherein the positions of the magnetic field detection elements are little changed due to temperature, and a method for manufacturing the magnetic encoder apparatus.12-16-2010
20130154625DEVICE FOR MEASURING BENDING ANGLE OF CONSTANT VELOCITY JOINT OF DRIVE SHAFT - Provided is a device for measuring a bending angle of a constant velocity joint of a drive shaft, the device including an outer race provided at a drive shaft and having an opening part formed at one end thereof, a permanent magnet mounted in the opening part of the outer race, and a sensor provided on an outer peripheral surface of the drive shaft and interlocking with the permanent magnet to measure a bending angle between the drive shaft and the outer race. Therefore, a size and a direction of the bending angle between the drive shaft and the outer race may be measured, thereby making it possible to improve marketability and stability of a vehicle.06-20-2013
20130154626ROTATION DETECTION DEVICE AND MANUFACTURING METHOD FOR THE SAME - A rotation detector component detects a rotational state of a rotor and sends a rotational detection signal. A signal transmission component is electrically connected with a lead frame of the rotation detector component to transmit the rotational detection signal to an external device. A body portion holds the rotation detector component and a part of the signal transmission component. The body portion is integrally molded of a first resin to cover a joint portion between the lead frame and the signal transmission component, the rotation detector component, and a part of the signal transmission component. The rotation detector component has corners including at least two exposed corners, which are exposed from the body portion.06-20-2013
20130154627ROTARY ACTUATOR - A rotary actuator has a handle, rotatable about an axis of rotation, and a position sensor system for detecting the rotary position of the handle. The rotary actuator has an actuating segment is made of an electrically conductive material and, forming a capacitor, is opposite a sensor segment of a stationary segment ring, which is concentric with respect to the axis of rotation 3 and consists of a plurality of sensor segments. The sensor segments include an electrically conductive material and are axially spaced apart by an air gap. A sensor line leads from each sensor segment to evaluation electronics.06-20-2013
20110285387ROTOR WITH A COMPENSATING MASS FOR A RELUCTANCE RESOLVER, AND RELUCTANCE RESOLVER - The invention relates to a rotor (11-24-2011
20110309827ANGLE SENSOR - An assembly for sensing the angular position of a rotatable shaft includes a bearing ring, a driving gear, and a measuring gear. The bearing ring is connectable to the shaft and has two recesses. The driving gear is rotatable about a rotational axis and has two entraining elements. The entraining elements extend radially toward the rotational axis of the driving gear and are arranged opposite one another with respect to the circumference of the driving gear. The entraining elements respectively penetrate into the recesses of the bearing ring such that the driving gear is connected to the bearing ring and rotates as the bearing ring rotates. The measuring gear is rotatable about a rotational axis and is engaged with the driving gear such that the measuring gear rotates as the driving gear rotates. One of the entraining elements is resilient.12-22-2011
20110309826DEVICE FOR DETECTING A ROTATIONAL ANGLE OF A ROTATABLE PART - An apparatus for sensing a rotation angle of a rotatable part, preferably a steering wheel or steering column of a vehicle includes at least one magnet, at least one sensor that senses the magnetic field of the magnet, at least one housing in which the sensor and/or magnet are disposed movably relative to one another, wherein a hub is provided which is connected to the magnet to yield an integrated component, and which is connectable to the rotatable part.12-22-2011
20120056617ROTATION ANGLE DETECTING DEVICE - A rotation angle detecting device includes a rotating body rotating according to rotation of a vehicle pedal; a magnet attached to the rotating body; a magnetism detection element disposed facing the magnet at a predetermined interval from the magnet; and a first control circuit connected to the magnetism detection element. The center of the magnet is placed at the rotation center of the rotating body. The magnetism detection element detects magnetism of the magnet to output a detection signal. The first control circuit outputs an angle signal corresponding to a rotation angle of the rotating body according to the detection signal, and outputs a switching signal according to the rotation angle of the rotating body. The rotation angle detecting device reliably detects a rotation angle and turns a stop lamp on and off for example with a simple structure.03-08-2012
20130200888SENSING MAGNET APPARATUS FOR MOTOR - Disclosed is a sensing magnet apparatus for an motor, the apparatus including a disk-shaped plate centrally inserted by a rotation shaft, a ring-shaped sensing magnet so installed as to surface-contact an upper surface of the plate, formed at a position near to a periphery with a main magnet, and formed at a position near to a through hole with a sub magnet, and a separation inhibition unit physically coupling the plate and the sensing magnet to maintain the coupled state between the plate and the sensing magnet.08-08-2013
20130093414RELATIVE ANGLE SENSING DEVICE AND PRODUCTION METHOD OF RELATIVE ANGLE SENSING DEVICE - A relative angle sensing device that senses a relative angle between two rotary shafts is provided with: a hard magnetic body that is provided to one rotary shaft out of the two rotary shafts; a soft magnetic body that is provided to the other rotary shaft out of the two rotary shafts to be arranged in a magnetic field formed by the hard magnetic body, and forms a magnetic circuit together with the hard magnetic body; and a sensing unit that senses a magnetic flux density of the magnetic circuit. The soft magnetic body is formed by injection molding by using a material obtained by mixing a magnetic powder and a synthetic resin.04-18-2013
20120086440ROTATION DETECTING DEVICE AND BEARING EQUIPPED WITH ROTATION DETECTING DEVICE - A rotation detecting device, which is compatible regardless of whether a process control device for processing an output signal of the rotation detecting device is standard one or new one having high input signal resolving power, and, also, a rotation detecting device equipped bearing assembly having such rotation detecting device, are provided. The rotation detecting device includes an encoder provided rotatably and having a plurality of circumferentially equidistantly arranged to-be-detected poles, and a sensor for detecting the to-be-detected poles. The use is made of a multiplying unit for multiplying the phase of the to-be-detected poles from an output of the sensor. The use is also made of a pulse outputting unit for receiving an output of the multiplying unit or both the output of the multiplying unit and an output of the sensor and output pulses having two multiplying powers different from each other.04-12-2012

Patent applications in class Rotary