Patent application number | Description | Published |
20090007663 | Inertia Force Sensor - An inertial force sensor is provided in which each of switches is connected in parallel with each of resistors of low-pass filter and high-pass filter, respectively, and capacitor of high-pass filter can be boost charged by making switches on without mediate resistors. | 01-08-2009 |
20090145224 | METHOD FOR PROCESSING DETECTION SIGNAL OF VIBRATORY INERTIAL FORCE SENSOR AND VIBRATORY INERTIAL FORCE SENSOR - A method for processing a detection signal of a vibratory inertial force sensor is disclosed. This method improves detection accuracy of the vibratory inertial force sensor. A detection circuit of the vibratory inertial force sensor removes harmonic component from signals synchronously wave-detected, and amplifies the resultant signals, and then smoothes the amplified signals. A vibratory inertial force sensor adopting this method is also disclosed. | 06-11-2009 |
20090165555 | Vibration-Type Inertia Force Sensor And Electronic Apparatus Using The Same - A vibration-type inertia force sensor includes: an oscillator; a driving section for oscillating the oscillator; a sensing section for sensing a strain caused in the oscillator due to an inertia force; and a power supply section for supplying power to the driving section and the sensing section in a normal state and for supplying power to one of the driving section and the sensing section and not supplying power to the other of the driving section and the sensing section in a power-saving state. | 07-02-2009 |
20090249876 | SENSOR DEVICE - A sensor device includes a time determining part that determines time point information, and adds the time point information to the output supplied from a part subjected to failure diagnosis and related to generation of a failure detection signal, and to the output related to generation of a sense signal. With this structure, the failure detection signal is correlated with the sense signal by the time point information. Alternatively, the sensor device includes an output circuit that correlates the failure detection signal with the sense signal supplied at the same time point as the failure detection signal, and outputs both signals using a time division method. | 10-08-2009 |
20090288487 | ANGULAR SPEED SENSOR - An angular velocity sensor includes a vibrator vibrating, first and second differential circuits for outputting first and second difference signals, respectively, and a synchronous detector circuit for synchronously detecting the first and second difference signals. First and second sensors outputs first and second detection signals in response to a distortion produced due to an inertial force. The second detection signal has a phase reverse to a phase of the first detection signal. The first difference signal corresponds to a difference provided by subtracting the first detection signal from the second detection signal. The second difference signal corresponds to a difference provided by subtracting the second detection signal from the first detection signal. This angular velocity sensor detects an angular velocity of the vibrator accurately. | 11-26-2009 |
20100083757 | SENSOR DEVICE - A sensor device includes a time determining part that determines time point information, and adds the time point information to the output supplied from a part subjected to failure diagnosis and related to generation of a failure detection signal, and to the output related to generation of a sense signal. With this structure, the failure detection signal is correlated with the sense signal by the time point information. Alternatively, the sensor device includes an output circuit that correlates the failure detection signal with the sense signal supplied at the same time point as the failure detection signal, and outputs both signals using a time division method. | 04-08-2010 |
20100095772 | METHOD FOR PROCESSING DETECTION SIGNAL OF VIBRATORY INERTIAL FORCE SENSOR AND VIBRATORY INERTIAL FORCE SENSOR - A method for processing a detection signal of a vibratory inertial force sensor is disclosed. This method improves detection accuracy of the vibratory inertial force sensor. A detection circuit of the vibratory inertial force sensor removes harmonic component from signals synchronously wave-detected, and amplifies the resultant signals, and then smoothes the amplified signals. A vibratory inertial force sensor adopting this method is also disclosed. | 04-22-2010 |
20100097088 | SENSOR APPARATUS - The present invention includes an output circuit section for digitally outputting from an output terminal in a time division system a failure detection signal from a failure diagnosis circuit and a sense signal from a process circuit section, leading to reduction in size of a sensor apparatus. Further, outputting a failure detection signal earlier than a sense signal leads to improvement in reliability at the time of abnormality. | 04-22-2010 |
20100107764 | ACCELERATION SENSOR - An acceleration sensor includes a mount section arranged to be fixed to an object, a flexible section coupled to the mount section, a weight coupled to the mount section via the flexible section, and first and second opposed electrode unit. The first opposed electrode unit includes a first electrode placed on the weight and a second electrode spaced away from and facing the first electrode, and provides a first capacitance. The second opposed electrode unit includes a third electrode placed on the weight and a fourth electrode spaced away from and facing the third electrode, and provides a second capacitance. The first and third electrodes are arranged along a first direction. The second and fourth electrodes are spaced away from and face the first and third electrodes along a second direction perpendicular to the first direction, respectively. A component of an acceleration along the first direction applied to the object is detected based on the first and second capacitances. A control voltage is applied to the first and second opposed electrode units. The control voltage is changed when both of the first capacitance and the second capacitance simultaneously increase or decrease. This acceleration sensor detects the acceleration accurately. | 05-06-2010 |
20100116051 | ANGULAR VELOCITY SENSOR - There is provided a signal separation circuit of an angular velocity sensor where a first sensing section, a second sensing section and a third sensing section which are arranged in two second arms are connected to a detection circuit section, and in this detection circuit section, an angular velocity is detected based upon angular velocity signals outputted from the first to third sensing electrode sections. | 05-13-2010 |
20100154539 | SENSOR DEVICE - An sensor device with high detection accuracy. A time-point measurement unit is provided for measuring time-point information and adding the time-point information to an angular velocity sensing signal and an acceleration sensing signal. The angular velocity sensing signal and the acceleration sensing signal are linked by the time-point information. This structure enables output of the angular velocity sensing signal and the acceleration sensing signal linked by the time-point information. Accordingly, the angular velocity sensing signal can be accurately corrected using the acceleration sensing signal. The detection accuracy of the sensor device thus improves. | 06-24-2010 |
20100154540 | SENSOR DEVICE - An sensor device with high detection accuracy. The sensor device includes an angular velocity sensor for outputting an angular velocity sensing signal, an acceleration sensor for outputting an acceleration sensing signal, and an output circuit for outputting the angular velocity sensing signal and the acceleration sensing signal. The output circuit outputs signals in a digital format according to the time-division system, so as to link timewise the angular velocity sensing signal and the acceleration sensing signal detected at the same timing as one signal. | 06-24-2010 |
20100194401 | SENSOR APPARATUS - A sensor apparatus of the present invention includes a first output terminal for outputting a sense signal, and a failure diagnosis circuit for determining whether a failure diagnosis object section is normal or abnormal, to output a failure detection signal from a second output terminal in the case of determining abnormality. The time required for an output concerning the failure detection signal from the failure diagnosis object section to reach the second output terminal is shorter than the time required for an output concerning the sense signal from the failure diagnosis object section to reach the first output terminal, thus leading to improvement in reliability under abnormal condition. | 08-05-2010 |
20100198557 | SENSOR APPARATUS - A sensor apparatus of the present invention is provided with a failure diagnosis circuit for setting as a failure diagnosis object section at least any one of a drive circuit section, a detection device, a detection circuit section and a processing circuit section, determining whether the failure diagnosis object section is normal or abnormal, and outputting a failure detection signal from a second output terminal in the case of determining abnormality. It is configured such that a signal of a value outside a range of a normal output voltage is outputted from the first output terminal in the case of the failure diagnosis circuit determining abnormality of the failure diagnosis object section, thereby to improve reliability under abnormal condition. | 08-05-2010 |
20100199761 | INERTIA FORCE SENSOR - When detecting an angular rate in a detecting element ( | 08-12-2010 |
20100265082 | ELECTRONIC DEVICE - An electronic device includes a case, an angular velocity sensor fixed to the case, a data memory storing plural reference profiles, an output unit operating in a plurality of operation modes corresponding to the reference profiles, and a processor controlling the output unit. The angular velocity sensor sends a signal according to an angular velocity applied to the case. The processor is operable to receive the signal sent from the angular velocity sensor, to select a reference profile out of the plural reference profiles according to the received signal, and to cause the output unit to operate in an operation mode out of the plural operation modes corresponding to the selected reference profile. A user can operate this electronic device with a quick response. | 10-21-2010 |
20100271042 | SENSOR APPARATUS - A sensor apparatus of the present invention includes a failure diagnosis circuit for setting as a failure diagnosis object section at least any one of a drive circuit section, a detection device, a detection circuit section and a processing circuit section, and determining whether the failure diagnosis object section is normal or abnormal. The sensor apparatus also includes a time point measuring unit for measuring time point information, and adding the time point information to an output concerning generation of the failure detection signal outputted from the failure diagnosis object section and an output concerning generation of the sense signal such that the output concerning generation of the failure detection signal is made to correspond to the output concerning generation of the sense signal using time point information in terms of time points. In the case of the failure diagnosis circuit determining abnormality of the failure diagnosis object section, the first output terminal outputs the sense signal added with the time point information at the time of occurrence of the abnormality and the sense signal added with the time point information after the time of occurrence of the abnormality, as a signal outside a range of a normal output voltage. Alternatively, the sensor apparatus of the present invention includes an output circuit section for outputting a sense signal from the processing circuit section and a failure detection signal from a failure diagnosis circuit by the time division system. In the case of the failure diagnosis circuit determining abnormality of the failure diagnosis object section, the output circuit section outputs the sense signal added with the time point information at the time of occurrence of the abnormality and the sense signal added with the time point information after the time of occurrence of the abnormality, as a signal outside a range of a normal output voltage. | 10-28-2010 |
20100280794 | SENSOR DEVICE - A sensor device includes a time determining part and an output circuit. The time determining part determines time point information, and adds the time point information to the output supplied from a part subjected to failure diagnosis and related to generation of a failure detection signal, and to the output related to generation of a sense signal. The output circuit outputs the sense signal with the time point information added by the time determining part after the failure detection signal correlated with the sense signal by the time point information is output. | 11-04-2010 |
20110041607 | INERTIAL FORCE SENSOR - An inertial force sensor which reduces the deterioration of an angular speed detection accuracy and improves the diagnosis accuracy of fault diagnosis is provided. | 02-24-2011 |
20110208443 | SENSOR APPARATUS - A sensor apparatus of the present invention includes a first output terminal for outputting a sense signal, and a failure diagnosis circuit for determining whether a failure diagnosis object section is normal or abnormal, to output a failure detection signal from a second output terminal in the case of determining abnormality. The time required for an output concerning the failure detection signal from the failure diagnosis object section to reach the second output terminal is shorter than the time required for an output concerning the sense signal from the failure diagnosis object section to reach the first output terminal, thus leading to improvement in reliability under abnormal condition. | 08-25-2011 |
20110265567 | INERTIAL FORCE SENSOR AND DETECTING ELEMENT USED FOR SAME - A detecting element for an inertial force sensor includes a mass section, an excitation section, and a detecting section. The excitation section excites the mass section along a third direction among a first direction, a second direction, and the third direction that are perpendicular to each other. The detecting section outputs a signal corresponding to displacement of the mass section along at least one of the first direction and the second direction. Resonance frequencies Fsx and Fsy of the first direction and the second direction are set greater than a resonance frequency Fxd of the third direction. | 11-03-2011 |
20110285444 | OSCILLATOR CIRCUIT, METHOD FOR MANUFACTURING OSCILLATOR CIRCUIT, INERTIAL SENSOR USING THE OSCILLATOR CIRCUIT, AND ELECTRONIC DEVICE - An oscillator circuit includes an oscillator, a filter that filters a monitoring signal output from the oscillator and outputs the filtered signal, a driver that amplifies the filtered signal to generate a driving signal, and a controller operable to control a passing characteristic of the filter based on the monitoring signal. The oscillator performs a vibration while being driven by the driving signal, and outputs the monitoring signal according to the vibration. This oscillator circuit allows the oscillator to vibrate stably. | 11-24-2011 |
20120167658 | INERTIAL SENSOR - An inertial sensor includes an oscillator, a drive unit for oscillating the oscillator, a sensor for sensing the amount of inertia applied to the oscillator, and a failure diagnosis unit disposed between the oscillator and the drive unit. The drive unit includes a reference potential supply unit for supplying a reference potential to the oscillator, and a drive signal supply unit for supplying a drive signal to the oscillator based on a monitor signal received from the oscillator. The failure diagnosis unit includes a diagnosis unit for diagnosing a failure based on the value of a current supplied by the reference potential supply unit to the oscillator. The inertial sensor having this structure can detect a failure in the drive unit or the oscillator. | 07-05-2012 |
20130233046 | INERTIAL FORCE SENSOR - An inertial force sensor of the present invention includes a detection element, a detection circuit for detecting the amount of inertia corresponding to the inertial force applied to the detection element; a first low-pass filter connected to the output side of the detection circuit; and a correction circuit for correcting the output of the first low-pass filter. The correction circuit includes a correction amount generation unit connected to the output side of the first low-pass filter; a correction amount storage unit connected to the output side of the correction amount generation unit; and a correction unit to connected to the output side of the first low-pass filter and to the output side of the correction amount storage unit. The correction unit corrects an output value of the first low-pass filter based on a correction amount stored in the correction amount storage unit. | 09-12-2013 |
20140007645 | INERTIAL FORCE SENSOR AND ZERO POINT CORRECTION MEHTOD USED THEREIN - A detecting unit outputs an object signal corresponding to an inertial force. A first environment value is obtained at a first time point. A second environment value is obtained at a second time point. An environment difference value which is a difference between the first and second environment values is calculated. An environment change detection signal is output when an absolute value of the environment difference value is larger than a predetermined determination threshold. A first averaged signal is output by averaging a corrected signal in a predetermined period continuing to the first time point. A second averaging signal is output by averaging the corrected signal in a predetermined period continuing to the second time point. An offset difference value is stored when the environment change detection signal is output. The corrected signal is generated by adding the stored offset difference value to the object signal. | 01-09-2014 |
20150013459 | IV CONVERTER AND INERTIAL FORCE SENSOR USING IV CONVERTER - An IV converter includes a first operational amplifier connected to the capacitive component, a second operational amplifier connected to the first operational amplifier, and an impedance element connected to the second operational amplifier. The first operational amplifier includes a first input terminal connected to the capacitive component, a second input terminal connected to a reference potential, and first and second output terminals. The first output terminal is connected to the first input terminal to constitute a feedback loop. The second operational amplifier includes a third input terminal connected to the second output terminal, a fourth input terminal connected to a reference potential, and a third output terminal connected to the third input terminal via the impedance element to constitute a feedback loop. The phases of the currents output by the first and second output terminals of the first operational amplifier are substantially identical to each other. | 01-15-2015 |
20150033858 | INERTIAL FORCE SENSOR - An inertial force sensor has a first sensor element, a second sensor element, a first signal processor, a second signal processor, and a power controller. The first sensor element converts a first inertial force to an electric signal, and the second sensor element converts a second inertial force to an electric signal. The first signal processor is connected to the first sensor element, and outputs a first inertial force value. The second signal processor is connected to the second sensor element, and outputs a second inertial force value. The power controller is connected to the first signal processor and the second signal processor, and changes power supplied to the second signal processor based on the first inertial force value. | 02-05-2015 |
20150046737 | INERTIAL FORCE SENSOR AND ELECTRONIC DEVICE USING SAME - An inertial force sensor includes the following elements: a sensor element for converting an inertial force into an electrical signal; a sensor signal processor connected to the sensor element, for outputting an inertial force value; and a power controller for controlling electric power supply to the sensor signal processor, based on the inertial force value. When the inertial force value is maintained for a predetermined time period within a predetermined range in which a reference value is the middle value of the range, the power controller reduces the electric power supply to the sensor signal processor and updates the reference value to the inertial force value obtained after a lapse of the predetermined time period. | 02-12-2015 |
20150077579 | MOTION SENSOR, AND ELECTRONIC APPARATUS USING SAME - A motion sensor includes a sensor element that outputs a sense signal in response to a motion applied thereto and a sensor circuit that senses the motion based on the sense signal. The sensor circuit includes a sensor-element-signal amplifier that receives the sense signal. The sensor-element-signal amplifier operates switchably between at a normal mode and at a low-noise mode that consumes a larger electric power and produces a smaller noise than the normal mode. This motion sensor senses a small motion and a large motion accurately. | 03-19-2015 |