| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073862331 | Inductance or reluctance sensor | 63 |
| 20120285266 | TORQUE SENSOR - Two magnetic flux collecting rings are installed into a corresponding position axially located between two magnetic yokes. The magnetic flux collecting rings collect a magnetic flux from the magnetic yokes. The magnetic flux collecting rings at least partially overlap with the magnetic yokes in a view taken in the axial direction. | 11-15-2012 |
| 20090120209 | SYSTEMS AND METHODS FOR TEMPERATURE COMPENSATING TORQUE SENSORS - Apparatus, systems, and methods are provided for temperature compensating a torque sensor. One apparatus includes a shaft temperature detector and a temperature compensation circuit configured to alter tensile and compression voltages representative of tensile and compression stresss, respectively, due to a torque being applied to the shaft based on shaft temperature. A system includes a sensor configured to generate tensile and compression voltages representative of tensile and compression stresss, respectively, due to a torque being applied to a shaft, a shaft temperature detector, and a junction box. The junction box is configured to alter the tensile and compression voltages based on shaft temperature. One method includes receiving tensile and compression voltages representative of tensile and compression stresss, respectively, due to torque being applied to a shaft, altering the tensile and compression voltages based on shaft temperature, and determining the amount of torque based on the altered tensile and compression voltages. | 05-14-2009 |
| 20090241691 | METHOD AND APPARATUS FOR MEASURING FORCE PARTICULARLY TORQUE - A method and apparatus for measuring the force applied by a first member coupled to a second member by a connecting body, by: transmitting a cyclically-repeating energy wave through the connecting body from a first location thereon to a second location thereon; measuring the transit time of the cyclically-repeating energy wave from the first location to the second location; and utilizing the measured transit time to produce a measurement of the force. In the preferred described embodiment, the connecting body is a fastening plate which fastens a drive shaft to a driven shaft and measures the torque output of the drive shaft. | 10-01-2009 |
| 20110023627 | METHOD AND DEVICE FOR PROVIDING A TORSION ELEMENT OF A TORQUE SENSOR WITH MAGNETIZATION - The present invention relates to a method for providing a one- or multipart torsion element of a torque sensor with at least one magnetic encoding by applying at least one current pulse to the torsion element. It is provided that the variation of the current pulse over time is formed. Moreover, the present invention relates to a device for providing a one- or multipart torsion element of a torque sensor with at least one magnetic encoding. | 02-03-2011 |
| 20090293642 | ARRANGEMENT FOR THE NON-CONTACT MEASUREMENT OF TORQUE - An arrangement for the non-contact measurement of torque on a shaft of a transmission. The arrangement having at least one detector ( | 12-03-2009 |
| 20100326208 | DEVICE FOR DETERMINING A TORQUE AND/OR A ROTATIONAL ANGLE OF A SHAFT - A device for determining a torque and/or a rotational angle of a shaft, which has a circuit carrier, which is concentric to the shaft, and on which at least two current-conducting printed conductor sections are situated. The device additionally has one transducer element, which is concentric to the shaft and is rotatable in relation to the circuit carrier, having at least one first subarea made of electrically conductive material and at least one second subarea made of electrically nonconductive material. Upon application of a torque to the shaft, the transducer element rotates in relation to the circuit carrier, whereby an overlap area between the printed conductor sections and the first subarea(s) of the transducer element changes and thus a change in an inductance of the printed conductor sections occurs. | 12-30-2010 |
| 20120234107 | NON-CONTACT TORQUE MEASUREMENT APPARATUS AND METHD - Disclosed is an apparatus and method for accurately measuring torque in a rotating shaft. The apparatus comprises axially spaced magnet-detector pairs, mounted to rotate with the shaft and means for sensing relative rotation between the magnets. | 09-20-2012 |
| 20130019693 | ROTATION ANGLE AND TORQUE SENSOR - The rotation-angle and torsion sensor has two gears that are connected so as not to turn with shaft sections, which [gears] mesh with gears. On one of the gears a unipolar or multipolar magnet is attached. On the other gear, magnetic flux guides matching to number of poles are attached, that are configured as L shapes. One leg of the flux tranducers points in the direction of the multipolar magnet while the other legs run parallel to the gear and in fact one on one side and the other on the other side of the gear, with these legs enclosing a second sensor between them that is situated in the gear. | 01-24-2013 |
| 073862332 | Variable air gap in a magnetic core | 3 |
| 20100180696 | SYSTEMS INVOLVING COMPACT TORQUE SENSING - A torque sensor system comprising, an inner tooth, an outer tooth disposed on an outer yoke member centered on an axis spaced radially from the inner tooth, a plate member, a retainer member operative to retain the outer yoke member and the plate member, a magnet member centered on the axis disposed between the inner tooth and the outer tooth, an air gap partially defined by the plate member and the outer yoke member, and a magnetosensitive element disposed in the air gap operative to sense a magnetic flux induced by an angular displacement of the magnet member relative to the inner tooth and the outer tooth. | 07-22-2010 |
| 20100319467 | INDUCTIVE TORQUE SENSOR - The present invention relates to an inductive torque sensor ( | 12-23-2010 |
| 20120260746 | TORQUE SENSOR - The present disclosure relates to a torque sensor configured to axially magnetize a magnet and simplify a stator structure facing the magnet, whereby dimensions and shapes of members capable of collecting magnetism can be easily controlled to provide a torque sensor excellent in operational reliability, the torque sensor including a ring-shaped and axially-magnetized magnet connected to one of an input shaft of a steering wheel and an output shaft; and a stator including a ring-shaped body axially discrete from the magnet and a plurality of holes vertically penetrating the body, whereby structure of the torque sensor is simplified to enhance a concentrated efficiency of magnetic change. | 10-18-2012 |
| 073862333 | Detecting magnetostrictive or magnetoelastic property | 52 |
| 20110214516 | TORQUE DETECTION DEVICE FOR POWER STEERING - A torque detection device for a power steering which is less liable to be influenced by external factors or by a bending force exerted on a shaft. In the torque detection device, a torque is generated between an input shaft, which is turned interlockedly with a steering handle for operating the traveling direction of a vehicle, and an output shaft turned interlockedly with the input shaft so as to steer the vehicle. An assisting force is exerted on the output shaft by an assisting unit that is determined based on the detection result. The torque detection device is provided between the input shaft and the output shaft and includes a cam mechanism by which a torque generated between the input shaft and the output shaft is converted into a thrust force, and a pressure sensor for detecting the thrust force into which the torque is converted by the cam mechanism. | 09-08-2011 |
| 20130081480 | INSTRUMENT FAULT INDICATION APPARATUS - A measuring system is disclosed that may include a sensing module that provides a response to a measured quantity, a first mechanical transducer that provides an output signal proportional to the measured quantity, a conversion device that converts the output signal to a second output signal, and a sensor that detects the second output signal and generates an instrument reading within an instrument range of output signals. A bias assembly may forces a second mechanical transducer to provide the second output signal that is detected by the sensor and which generates an instrument reading outside of the specified instrument range when the mechanical transducer is disconnected from the conversion device. A level detector is also disclosed that may include a displacer assembly, a torque rod coupled to the displacer assembly and connected to a magnet, and a non-contact sensor that detects displacement of the magnet assembly within an instrument range. | 04-04-2013 |
| 20090007697 | Sensor Device Capable of Identifying any Components of a Mechanical Force Applied to a Movable Object - A sensor device is capable of identifying any components of a mechanical force applied to a movable object. The sensor device includes a movable object including at least one magnetically encoded region having a magnetic field; a plurality of magnetic field detectors being placed around the at least one magnetically encoded region of the movable object at regular intervals; and a signal processing unit being connected to the plurality of magnetic field detectors. The plurality of magnetic field detectors are set up to convert changes in the magnetic field of the at least one magnetically encoded region caused by each component of the mechanical force applied to the movable object into corresponding electrical signals. The signal processing unit receives the corresponding electrical signals being representative for the respective components of the mechanical force applied to the movable object. The signal processing unit is programmed to identify the respective components of the mechanical force applied to the movable object on the basis of the corresponding electrical signals. | 01-08-2009 |
| 20110138933 | SENSOR HAVING EMI SHIELDING FOR MEASURING ROTATING SHAFT PARAMETERS - An EMI shielded sensing system is for measuring parameters associated with a rotating device having a rotating shaft. The system includes a rotating unit mechanically coupled to the rotating shaft. The rotating unit includes a sensor that provides a sensing signal that is coupled to a first antenna. A stationary unit includes a second antenna. The stationary unit and rotating unit are in wireless communication via a wireless link, and the stationary unit provides RF energy to power the rotating unit over the wireless link. The rotating unit sends the sensing output to the stationary unit over the wireless link. A multi-metal shroud for EMI shielding is positioned around the rotating unit and stationary unit. The shroud includes a ferromagnetic layer and a non-ferromagnetic layer. | 06-16-2011 |
| 20100101336 | MAGNETOSTRICTIVE TORQUE SENSOR AND TORQUE DETECTION METHOD - A magnetostrictive torque sensor that detects a torque of a rotating shaft and/or a stationary shaft by using a magnetostriction inverse effect that occurs on a shaft surface, the magnetostrictive torque sensor includes a first detection coil, a second detection coil, a first oscillation circuit, a second oscillation circuit, a first direction magnetic permeability detector, a second direction magnetic permeability detector, and a torque detector. | 04-29-2010 |
| 20100077869 | Sensor System Including a Magnetized Shaft - A sensor includes a shaft and a magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and/or shaft rotational position. | 04-01-2010 |
| 20110167929 | Sensor For Measuring Stresses Including A Layer Of A Magnetoelastic Material And A Method For Producing The Layer - A sensor for measuring stresses induced by a force applied to a load-carrying member, including a layer of a magnetoelastic material formed on the load-carrying member is provided. The layer comprises a first phase with an average grain size below 100 nm and a first chemical composition, and a second phase of a distinctly different chemical composition, the first phase being divided by the second phase into regions having an average size in the range of 100-10,000 nm. A method for producing such a layer, including accelerating particles of a soft magnetic and magnetoelastic material having an average size in the range of 10-50 μm towards the surface of the load-carrying member at a velocity of at least 300 m/s such that the average temperature of the accelerated particles is not higher than 500° C. above the melting temperature of the magnetoelastic material, but not lower than 500° C. below the melting temperature. | 07-14-2011 |
| 20080295612 | Torque Sensor - A torque sensor comprises a housing, a torsion device which is rotationally mounted inside the housing, a dynamic sensor unit which is rotationally fixed to the torsion device and a static sensor unit cooperating with the dynamic sensor unit. The static sensor unit is elastically connected to the housing via a decoupling device. | 12-04-2008 |
| 20080245161 | Magnetostrictive torque sensor and method for manufacturing same - A magnetostrictive torque sensor for detecting a torque comprises an operating shaft, a first hollow shaft, a second hollow shaft, a first magnetostrictive film, and a second magnetostrictive film. Torque acts on the operating shaft from the outside. The first and second hollow shafts are fitted and fixed separately on the operating shaft. The first magnetostrictive film is formed on an external peripheral surface of the first hollow shaft while the second magnetostrictive film is formed on an external peripheral surface of the second hollow shaft. | 10-09-2008 |
| 20080314163 | Magnetostrictive Torque Sensor and Electric Power Steering Apparatus - This magnetostrictive torque sensor | 12-25-2008 |
| 20090266179 | MAGNETOSTRICTIVE TORQUE SENSOR AND ELECTRIC POWER STEERING APPARATUS - A magnetostrictive torque sensor includes first and second magnetostrictive films mounted on a pinion shaft and having different magnetic anisotropic properties, a first detecting coil disposed in facing relation to the first magnetostrictive film, a second detecting coil disposed in facing relation to the second magnetostrictive film, a transistor, and a detector for detecting a torque applied to the pinion shaft based on a first detected signal representative of a potential at the junction between the first detecting coil and the second detecting coil. | 10-29-2009 |
| 20090165571 | Sensor System Including a Magnetized Shaft - A sensor includes a shaft and a magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and shaft rotational position. | 07-02-2009 |
| 20080282811 | Monitoring Device for Sensing the Rotation Speed and the Torque in a Shaft - To monitor the rotation speed and torque transmitted by a shaft ( | 11-20-2008 |
| 20080295613 | Magnetostrictive torque sensor - A magnetostrictive torque sensor for detecting a torque includes an operating shaft, magnetically insulating layers, and magnetostrictive films. The operating shaft is adapted to be applied with an external torque. The magnetically insulating layers are formed of a nonmagnetic material and provided on an outer peripheral surface of the operating shaft. The magnetostrictive films are provided on outer peripheral surfaces of the magnetically insulating layers. | 12-04-2008 |
| 20080257070 | Sensor Electronic - A sensor device including a moveable object, at least one magnetically encoded region provided on the movable object, at least one magnetic field detector adapted, adapted to detect a signal originating from the magnetically encoded region, and a sensor electronic adapted to perform an automatic gain matching. | 10-23-2008 |
| 20090025488 | METHOD AND SYSTEM FOR NON-CONTACT SENSING OF THE TORQUE OF A SHAFT - Torque measurements from a rotating shaft suffer from periodic disturbances known as “shaft run-out.” These are caused by inhomogeneities in the shaft such as frozen mechanical stresses or anisotropic magnetic properties and can make it difficult to identify the underlying torque signal. A method and system for removing or reducing the effect of shaft run-out is disclosed comprising measuring the torque of a rotatable shaft at a position around the circumference of the shaft and correlating the measured torque signal with data indicative of the material properties of the shaft at corresponding positions around the circumference of the shaft. A corrected torque signal is then generated in which the effect of the shaft inhomogeneities are reduced or removed providing a far clearer torque signal. | 01-29-2009 |
| 20090049931 | Magnetostrictive Torque Sensor - A magnetostrictive torque sensor of the present invention is provided with: a magnetostrictive film; a detection coil; a current direction switching device; and an inversion device, wherein: when the current flows in a direction from one side to another side of the detection coil by the current direction switching device, the torque reacted to the shaft is detected based on the input signal of the inversion device; and when the current flows in a inverse direction from another side to one side of the detection coil by the current direction switching device, the torque reacted to the shaft is detected based on the output signal of the inversion device. | 02-26-2009 |
| 20090211376 | Device and method for measuring torsional moment - A device for measuring the torque applied to a kinematic assembly including a detection means capable of supplying a signal representative of the angular position A | 08-27-2009 |
| 20090249893 | MEASURING DEVICE INCLUDING A LAYER OF A MAGNETOELASTIC ALLOY AND A METHOD FOR PRODUCTION THEREOF - A measuring device including a layer of a magnetoelastic alloy formed on a load-carrying member. The layer is intended for measuring stresses induced by a force applied to the load-carrying member. An average grain size of the layer is in the range of 100 nm to 10 000 nm. A method for production of the layer. | 10-08-2009 |
| 20090241692 | Torque sensor - A torque sensor ( | 10-01-2009 |
| 20090241693 | Torque sensor and manufacturing method thereof - A torque sensor ( | 10-01-2009 |
| 20100242626 | Self-compensating magnetoelastic torque sensor system - An improved magnetic torque transducer arrangement for self-compensating effects of external magnetic sources and temperature offset comprises a shaft with at least one magnetized zone, at least one active magnetic field sensor and at least one passive magnetic field sensor disposed in such a way that active field sensor always in a position with higher magnetic field strength arise from applied torque than that of passive sensor. Passive field sensors may also be placed in both sides of the active field sensor, or on one side of active field sensor only. The transducer output is obtained by subtract the output of passive field sensors from that of active field sensor thus cancel out the effect of interfering magnetic field flux and temperature offset on the torque transducer, and partially filter out temperature sensitivity drift and rotational dependant signal. The sensitivity of active and passive field sensors can also be electrically matched by calibrating them in a uniform magnetic field, thus a completely common mode rejection can be achieved. The sensor arrangements may also be utilized in other type of sensors that extract changes in magnetic fields to indirectly detect direction, speed, presence, force, linear position, or angle to cancel out interfering magnetic field and temperature offset effect. | 09-30-2010 |
| 20100199784 | TORQUE SENSOR WITH ALIGNMENT SYSTEM - A torque sensor for sensing torque in a rotatable shaft. The rotatable shaft is configured to rotate within a shaft housing. The sensor housing has a first end, a second end, and at least one sensing zone. At least one target zone is disposed on the rotatable shaft and substantially opposes the at least one sensing zone. At least one bearing member is disposed between the sensor housing and the rotatable shaft for limiting relative axial movement and allowing relative rotation between the sensor housing and the rotatable shaft. A first resilient member has a first end in contact with the first end of the sensor housing and a second end in contact with an interior wall of the shaft housing. A second resilient member has a first end in contact with a retaining member and a second end in contact with the second end of the sensor housing. | 08-12-2010 |
| 20090107260 | Magnetostrictive strain sensor with single piece sensor cavity - In one embodiment, a sensor assembly has a magnetostrictive (MS) element and a sensor housing defining at least one active wall. A sensor channel is disposed on a first side of the active wall, with the MS element being disposed in the sensor channel and closely received therein. A fluid is on a second side of the active wall, and the active wall is the wall through which stress from pressure of the fluid causes stress on the MS element. The sensor channel defines an axis parallel to the active wall, and the MS element is positioned adjacent the active wall by sliding the MS element into an end of the sensor channel in a direction parallel to the active wall. | 04-30-2009 |
| 20110126640 | MONOLITHIC MAGNETO-STRICTIVE LOAD TRANSDUCER - A load sensor is provided comprising a magnetostrictive material and a wire. The magnetostrictive material may comprise an aperture, a first face, a second face, a thickness, and a first dado. The wire is disposed at least partially in the first dado, wherein the first dado at least partially transverses at least one of the first face and the second face, wherein the wire at least partially transverses the first face and the second face. The load sensor may also comprise a magnetostrictive material comprising an aperture, a first face, a second face, a thickness, and a first channel, and a wire disposed at least partially in the first channel, wherein the first channel at least partially transverses at least one of the first face and the second face, wherein the wire at least partially transverses the first face and the second face. | 06-02-2011 |
| 20090320613 | ROTATION ANGLE AND TORQUE DETECTION DEVICE - A detection device includes a first rotating body, a first target fixed to the first rotating body, a first gear fixed to the first rotating body, a first magnetic detector element for detecting a rotation angle of the first rotating body, a second gear engaged with the first gear, a second rotating body having the second gear fixed thereto, a magnet provided at the second rotating body, a second magnetic detector element for detecting a rotation angle of the second rotating body, a third rotating body, a second target fixed to the third rotating body, a third magnetic detector element for detecting a rotation angle of the third rotating body, a torsion bar connected between the first rotating body and the second rotating body, and a controller operable to determine the rotation angle of the first rotating body and a torque applied to the torsion bar based on signals output from the first, second, and third magnetic detector element. The detection device detects an absolute rotation angle of plural turns and a torque. | 12-31-2009 |
| 20100071481 | TORQUE DETECTOR - A torque detector ( | 03-25-2010 |
| 20100257947 | TORQUE SENSOR - A torque sensor is configured so that a multi-pole permanent magnet is fixed to one of a first shaft and a second shaft linked via a torsion bar, a first rotating yoke and a second rotating yoke each having provided at equal intervals in the peripheral direction a plurality of claw portions facing the permanent magnet are fixed to the other of the first shaft and second shaft, and a magnetism detection element is disposed between a first magnetism-collecting yoke and a second magnetism-collecting yoke individually facing the first and second rotating yokes. The first and second rotating yokes are formed into identical shapes, and the claw portions provided respectively on the rotating yokes are alternatingly disposed in the peripheral direction within the same plane perpendicular to the axes of the first shaft and second shaft. Accordingly, it is possible to reduce a cost by having fewer types of parts. | 10-14-2010 |
| 20080314164 | Short Stroke Magnetic Position Sensor, in Particular for Measuring a Steering Column Twist - A position sensor, which can detect a steering column twist of a first magnetic rotoric structure including a plurality of radially oriented magnets and a second statoric structure including two concentric gear rings extended by radially oriented teeth. The rotoric structure is substantially disc-shaped and includes a ferromagnetic head supporting the plurality of magnets, the statoric structures are provided with interleaving teeth and the position sensor includes a third collector structure including two flow closing parts, one of which is fixed, and which define at least one air gap in which at least one magnetosensitive element is arranged. | 12-25-2008 |
| 20110162464 | Reduced Ambient Fields Error In A Magnetoelastic Torque Sensor System - An improved magnetic torque transducer involves a method and apparatus for compensating effects of uniform and/or non-uniform magnetic sources by placing three sets of magnetic field sensors around a shaft with at least one magnetized zone. The set of primary magnetic field sensor or sensors is placed proximate to the magnetized zone, both the second and third sets of secondary magnetic field sensors being placed by pre-determined distances to the primary set of magnetic field sensor or sensors, so that primary field sensors always in a position with higher magnetic field strength arise from applied torque than that of secondary sensors. And a method is developed to use the second and third signals from secondary sensors to adjust the primary signal to compensating for the effects of the uniform and/or non-uniform ambient magnetic field sources. | 07-07-2011 |
| 20090301224 | MAGNETOSTRICTIVE SENSING SYSTEMS AND METHODS FOR ENCODING - A magnetostrictive measurement system having one or more encoded polarized magnetic regions disposed circumferentially about a shaft, wherein adjacent magnetic regions along a section of the shaft have opposing polarities. In one embodiment the shaft is hollow and the encodings are interiorly disposed while in another embodiment the encodings are on the exterior surface of the shaft. There are one or more sensors, such as contact sensors, disposed about the shaft wherein the sensors enable measurements of at least one of bending moments or torque sensing. The sensors can also include non-contact sensors measuring the magnetic flux densities caused by the alternating magnetic fields from the rotating shaft. A processing section is used to process the sensor measurements, wherein the sensor measurements are used to compute at least one of shaft power, torque, speed, and bending moments. | 12-10-2009 |
| 20090301223 | DIRECT SHAFT POWER MEASUREMENTS FOR ROTATING MACHINERY - Direct shaft power measurements of rotating machinery, including a magnetic encoding system for the shaft, having at least one conducting member having a first end and a second end which is disposed proximate the shaft with a gap between the member and the shaft. There is a pair of electrodes proximate each end of said conducting member, wherein the electrodes are electrically coupled to the shaft. One of the electrodes is electrically coupled to the second end of the conductor member. An encoding source is electrically coupled to the first end of the conducting member and electrically coupled to the other electrode, wherein unipolar current pulses from said encoding source are applied to the electrodes and the conducting member, thereby creating sectional encoded polarized magnetic regions in the shaft. | 12-10-2009 |
| 20080216589 | Magnetostrictive torque sensor and electric power steering apparatus - A magnetostrictive torque sensor includes a rotating shaft rotatably supported; magnetostrictive materials provided on a surface of the rotating shaft, magnetic permeability of which changes according to the magnitude of rotary torque acting on the rotating shaft; and at least two detection coils provided to the rotating shaft, which detect change in the magnetic permeability of the magnetostrictive materials to output in the form of electrical change. Section secondary moments of the rotating shaft at its parts on which the detection coils are respectively placed are different from each other. | 09-11-2008 |
| 20120152034 | Sensor system - A sensor system has a rotational angle sensor for detecting a rotational angle and a torque sensor for detecting a torque. The rotational angle sensor has a rotatable rotational angle transmitter having index elements. The torque sensor has a rotatable torque transmitter having magnets, which generate a magnetic field, and a magnetic flux unit for amplifying the magnetic field. The index elements and the magnetic flux unit are connected to one another in a rotationally fixed manner. | 06-21-2012 |
| 20110088488 | Power steering device - A vehicle power steering device | 04-21-2011 |
| 20110265581 | Sensor System Including A Magnetized Shaft - A sensor includes a shaft and a magnetic sensor and an anti-aging magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and/or shaft rotational position. The anti-aging magnetic sensor may be positioned adjacent the active region to provide a reference signal output that is substantially independent of torque applied to said shaft. | 11-03-2011 |
| 073862334 | Grooved or slotted torsion shaft | 2 |
| 20100077870 | Torque Sensor - The present invention aims at detecting torque with a high degree of precision, by suppressing influences such as disturbance and rotation dependency. An output side cylinder is provided with a reference slit, and an input side cylinder is provided with a first detection slit and a second detection slit, which overlap the reference slit, the overlap amount between the first detection slit and the reference slit changing inversely with the overlap amount between the second detection slit and the reference slit, magnetic flux is applied from the inner side of the input side cylinder by a first drive coil and a second drive coil, a measuring circuit detects a phase difference between a phase of a detection signal for detecting the magnetic flux by a first detection coil provided on a position facing to the first detection slit on the outer side of the output side cylinder, and a phase of a detection signal for detecting the magnetic flux by a second detection coil provided on a position facing to the second detection slit on the outer side of the output side cylinder, and based on the phase difference, a torsion amount of the torsion bar is calculated. The directions of the magnetic flux generated by the first drive coil and second drive coil are opposite to each other. | 04-01-2010 |
| 20080250873 | Position Sensor Which Is Intended, in Particular, for Measuring Steering Column Torsion - The invention relates to a position sensor which is intended, in particular, for detecting a steering column torsion. The invention consists of: a first magnetic rotor structure ( | 10-16-2008 |
| 073862335 | Magnetic sleeve or layer | 14 |
| 20100043570 | SHAFT ARRANGEMENT HAVING A ROLLING BEARING - A shaft arrangement, with a rotatable shaft supported in a rolling bearing, which has rolling elements and an outer race, a torsion sensor having a permanently magnetic ring and at least one magnetic field sensor fastened to a fixed sensor bracket attached to the outer race being provided. A torsion sensor can hereby be integrated in a rotating bearing in a simple design. | 02-25-2010 |
| 20130091959 | MAGNETIC TORQUE SENSOR FOR TRANSMISSION CONVERTER DRIVE PLATE - A magnetic torque sensing device having a disk-shaped member with a magnetoelastically active region. The magnetoelastically active region has oppositely polarized magnetically conditioned regions with initial directions of magnetization that are perpendicular to the sensitive directions of magnetic field sensor pairs placed proximate to the magnetically active region. Magnetic field sensors are specially positioned in relation to the disk-shaped member to accurately measure torque while providing improved RSU performance and reducing the detrimental effects of compassing. | 04-18-2013 |
| 20130091960 | MAGNETIC TORQUE SENSOR FOR TRANSMISSION CONVERTER DRIVE PLATE - A magnetic torque sensing device having a disk-shaped member with a magnetoelastically active region. The magnetoelastically active region has a magnetically conditioned region with an initial direction of magnetization that is perpendicular to the sensitive directions of magnetic field sensor pairs placed proximate to the magnetically active region. Magnetic field sensors are specially positioned in relation to the disk-shaped member to accurately measure torque while providing improved RSU performance and reducing the detrimental effects of compassing. | 04-18-2013 |
| 20100242627 | TORQUE-INDEX SENSOR - A torque-index sensor having index sensor and torque sensor closely arranged and integrated therein with lightened interference between them is provided. The invented torque-index sensor is comprised of torque sensor that includes first magnetic sensor arranged beside first annular-shaped magnet and index sensor that includes second magnet arranged beside annular-shaped encoder and second magnetic sensor that are arranged being in-line on common axis; and means for varying magnetic flux, which changes direction of magnetic flux that is generated from second magnet toward first magnetic sensor, positioned between first magnetic sensor in torque sensor and second magnet in index sensor. | 09-30-2010 |
| 20120137789 | MAGNETOSTRICTIVE TORQUE SENSOR AND ELECTRICALLY-ASSISTED POWER STEERING APPARATUS - a magnetostrictive torque sensor includes a rotation shaft, a magnetostrictive member, and a plurality of detectors. The rotation shaft is rotationally supported. The magnetostrictive member is disposed on a surface of the rotation shaft and being deformable in accordance with a magnitude of rotation torque applied to the rotation shaft to change magnetic permeability. The plurality of detectors are disposed on a periphery of the rotation shaft. Each of the detectors is configured to detect a change in magnetic permeability of the magnetostrictive member in a form of an electrical change. The detectors are configured to detect different amounts of electrical change from one another if amounts of change in deformation are same throughout the magnetostrictive member. | 06-07-2012 |
| 20100218619 | DRIVE TORQUE SENSING WHEEL END - A sensing system for sensing the drive torque applied to a vehicle wheel end assembly ( | 09-02-2010 |
| 20110239787 | CONTROL UNIT FOR ELECTRIC POWER STEERING DEVICE - A bending load acting on a steering shaft only with a magnetostrictive torque sensor, without separately providing a sensor for detecting the bending moment. A storage unit stores, as an initial characteristic curve formed from initial detection values, a characteristic curve formed from detection values of each of a first detection coil and a second detection coil when only twisting torque is applied to a steering shaft. A bending load detector provided in an ECU detects a bending load amount acting on the steering shaft based on a difference between each detection value of the first and second detection coils and the initial detection value on the initial characteristic curve corresponding to the detection value. | 10-06-2011 |
| 20110239786 | ELECTRIC POWER STEERING APPARATUS FOR SADDLE-RIDE TYPE VEHICLE - An electric power steering apparatus includes a steering shaft for transmitting a steering force of a steering handlebar to a wheel and an upper bearing provided at a location upward from a vehicle body frame so as to rotatably support an upper part of the steering shaft. A lower bearing is provided at a location downward from the vehicle body frame, so as to rotatably support a lower part of the steering shaft. A torque sensor detects a torsional torque applied to the steering shaft. An electric motor imparts a steering force to the steering shaft based on the torsional torque detected by the torque sensor. The electric motor is mounted to the steering shaft between the upper bearing and the lower bearing, while the torque sensor is mounted to the steering shaft at place upward from the upper bearing. | 10-06-2011 |
| 20100263457 | MAGNETOSTRICTIVE TORQUE SENSOR AND METHOD OF MANUFACTURING SAME - A magnetostrictive torque sensor includes a single magnetostrictive film disposed on a steering shaft, and first and second coils for detecting changes in a magnetic property of the magnetostrictive film. The single magnetostrictive film includes a first anisotropic region and a second anisotropic region, having respective magnetic anisotropies inverse to each other. The first coil is disposed in confronting relation to the first anisotropic region, whereas the second coil is disposed in confronting relation to the second anisotropic region. | 10-21-2010 |
| 20090078058 | TORQUE SENSOR - A torque sensor includes a first shaft, a second shaft that is coaxially linked to the first shaft, a cylindrical magnet that rotates integrally with the first shaft, a pair of magnetic yokes that rotate integrally with the second shaft, and three magnetic sensors that respectively detect a change in magnetic flux of the magnetic yokes for calculating torque applied to the first and second shafts. Output characteristics of the three magnetic sensors are different from each other. | 03-26-2009 |
| 20100031756 | Rotational component torque measurement and monitoring system - A system and method for measuring torque on a rotating component, comprising of signal-producing components which are applied to the rotating component, and a means for obtaining the signals produced by said signal producing components, in which at least two signal producing components are applied to the rotating component with some linear separation between the two signal producing components and their corresponding devices for obtaining signals produced, such that torque applied to the rotating component will cause a change in phase between the signals received from each of the signal-producing components and thus permit the measurement of torque based on this change in phase; one embodiment of this invention comprising two magnetic rings, one at either end of a driveshaft, with sensor coils placed near to each magnetic ring such that an alternating electrical current is produced, the comparative phase between these currents permitting measurement of torque on the driveshaft. | 02-11-2010 |
| 20120006128 | SHAFT ARRANGEMENT HAVING A ROLLING BEARING - A shaft arrangement, with a rotatable shaft supported in a rolling bearing, which has rolling elements and an outer race, a torsion sensor having a permanently magnetic ring and at least one magnetic field sensor fastened to a fixed sensor bracket attached to the outer race being provided. A torsion sensor can hereby be integrated in a rotating bearing in a simple design. | 01-12-2012 |
| 20120060628 | TORQUE AND INDEX DETECTION APPARATUS - A torque and index detection apparatus includes a torque sensing section that senses torque exerted on a connecting shaft connecting a first and second shafts by a pair of magnetic sensing elements whose magnetic sensing directions are opposite, and a reference rotational position sensing section that senses a reference rotational position of the second shaft by the magnetic sensing elements. The reference rotational position sensing section includes a pair of magnets provided in the circumferential direction of the second shaft with like magnetic poles facing each other, a first magnetic part that is located between the magnets and the magnetic sensing elements, rotates integrally with the second shaft, and forms a magnetic path for magnetic flux of the magnets in the reference rotational position, and a second magnetic part that is provided between the magnetic sensing elements, and passes the magnetic flux from the first magnetic part uniformly to the magnetic sensing elements. | 03-15-2012 |
| 20120118081 | DEVICE FOR TRANSMITTING TORQUES - Device for transmitting torques with a torque-transmitting shaft and a bearing block for mounting the shaft. The device includes a measuring device for measuring a torque applied to the torque-transmitting shaft. The measuring device for measuring the torque device is at least partially integrated in the bearing block. | 05-17-2012 |
