Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 1781. Отображено 100.
19-07-2012 дата публикации

Temperature detection circuit and sensor device

Номер: US20120183016A1
Автор: Masahiro Kanai
Принадлежит: Seiko Epson Corp

A temperature detection circuit capable of generating a temperature detection voltage with reduced noise level, and a sensor device using the same are provided. The temperature detection circuit includes a temperature detection voltage generator that generates a first temperature detection voltage of which the voltage level based on a reference voltage varies according to the temperature; a temperature detection voltage inverter that inverts the first temperature detection voltage on the basis of the reference voltage, and amplifies or attenuates the first temperature detection voltage to generate a second temperature detection voltage; and a temperature detection voltage adder that adds up the first temperature detection voltage and the second temperature detection voltage.

Подробнее
Номер записи: 1
24-01-2013 дата публикации

Nano-Resonator Inertial Sensor Assembly

Номер: US20130019682A1
Автор: Ying Hsu
Принадлежит: Irvine Sensors Corp

The invention is a frequency modulated (FM) inertial sensing device and method which, in one embodiment, comprises an accelerometer having a proof mass coupled to a nano-resonator element. The nano-resonator element is oscillated at a first predetermined frequency, which may be a first resonant frequency, and is altered to oscillate at a second frequency, which may be a second resonant frequency, in response to a resultant force produced by the acceleration of the proof mass. The degree of change in nano-resonator element output frequency is sensed and processed using suitable processing circuitry as a change in acceleration.

Подробнее
Номер записи: 2
21-03-2013 дата публикации

PHYSICAL QUANTITY SENSOR

Номер: US20130068019A1
Автор: Takase Yasuhikde
Принадлежит:

An object of the invention is to provide a physical quantity sensor capable of producing a highly accurate physical quantity detection signal. The physical quantity sensor has an oscillator for converting an externally applied physical quantity into an electrical signal, an oscillation circuit which makes the oscillator oscillate, and a detector circuit for detecting a to-be-detected signal output from the oscillator by using a detection signal output from the oscillation circuit, includes a delta-sigma modulator, preceding the detector circuit, for delta-sigma modulating either one of the detection signal output from the oscillation circuit and the to-be-detected signal output from the oscillator, and for outputting a modulated signal, a variable voltage source capable of varying an output voltage, and a control unit for controlling the output voltage of the variable voltage source, and wherein the delta-sigma modulator performs the delta-sigma modulation by using a feedback signal created based on the output voltage. 1. A physical quantity sensor having an oscillator for converting an externally applied physical quantity into an electrical signal , an oscillation circuit for causing said oscillator to oscillate , and a detector circuit for detecting a to-be-detected signal output from said oscillator by using a detection signal output from said oscillation circuit , comprising:a delta-sigma modulator, preceding said detector circuit, for delta-sigma modulating either one of the detection signal output from said oscillation circuit and the to-be-detected signal output from said oscillator, and for outputting a modulated signal;a variable voltage source capable of varying an output voltage; anda control unit for controlling the output voltage of said variable voltage source,wherein said delta-sigma modulator performs said delta-sigma modulation by using a feedback signal created based on said output voltage.2. The physical quantity sensor according to claim 1 , ...

Подробнее
Номер записи: 3
04-04-2013 дата публикации

Devices, Systems, and Methods for Games, Sports, Entertainment And Other Activities of Engagement

Номер: US20130083941A1
Автор: David Witmer, Jason J. Ossenmacher, Jon Williams, Lawrence S. Rogel, Matt Garcia
Принадлежит: IntelliSysGroup LLC

Devices, systems, and methods according to one such aspect of the invention comprises (i) a sensing device that is attached (or otherwise coupled) to a skateboard and that measures a physical characteristic of it and/or of its environment, (ii) an audio output device, and (iii) a digital data processor that is communicatively coupled to the audio output device and the sensor. The digital data processor drives the audio output device to effect one or more selected sounds (e.g., to prompt the user to perform a selected action). The digital data processor, further, and monitors the sensing device to identify user actions in response to those sounds and drives the audio output device to effect still further sounds based on those actions.

Подробнее
Номер записи: 4
02-05-2013 дата публикации

Driving circuit for a microelectromechanical gyroscope and related microelectromechanical gyroscope

Номер: US20130104652A1
Автор: Gabriele CAZZANIGA, Luca Coronato
Принадлежит: STMICROELECTRONICS SRL

A driving circuit for a gyroscope device provided with a micromechanical detection structure having a driving mass, which is driven in resonance condition and elastically coupled to which is a sensing mass for enabling detection of angular velocity; the driving circuit has: a set of driving electrodes, coupled to the driving mass; a driving stage supplying driving signals to the set of driving electrodes to cause oscillation in resonance condition of the driving mass; and a reading stage, which detects movement of the driving mass to implement a feedback control of the driving signals. In particular, the reading stage is selectively coupleable to the set of driving electrodes in a way temporally alternative to the driving stage, for discrete-time detection of the movement of the driving mass.

Подробнее
Номер записи: 5
30-05-2013 дата публикации

METHOD FOR COMPENSATING DRIFT IN A POSITION MEASURING DEVICE

Номер: US20130138377A1
Автор: ERIKSSON Sven-Ake
Принадлежит: C2SAT COMMUNICATIONS AB

Method for compensating the drift of a gyro mounted on a vessel subjected to at least rotational motions, about horizontal axes centered around an equilibrium position, and vertical translational motions, which vessel includes a three-axial accelerometer for measuring the acceleration of the vessel along three directions, includes low pass filtering the output signal from the gyro, calculating an inclination signal based upon the measurement values of the accelerometer and low pass filtering it, compensating the output signal from the gyro based upon the difference between the two low pass filtered signals, selecting the cut-off frequency of the low pass filtration of the inclination signal so that it is larger than a typical oscillation frequency for the translational motions but smaller than a typical oscillation frequency for the rotational motions, calculating a total force vector from the three measurement values, and calculating the inclination signal based upon the total force vector. 112-. (canceled)1350151. Method for compensating for gyro drift of a gyro () which is fixedly mounted on a vessel () as a part of a position measuring means , which gyro () is arranged to measure the rotation of the vessel () about an axis (X ,Y ,Z) , which vessel during operation is subjected to at least{'b': '1', 'oscillating rotational motions of relative high frequency, which are centered about an equilibrium position which is assumed by the vessel () during operation, which rotational motions are performed about one or several axes (X,Z) which in the equilibrium position are horizontal, as well as to'}{'b': 1', '20', '1', '50', '20', '20', '1', '51', '52', '53', '50, 'claim-text': firstly, that the cut-off frequency of the low pass filtration of the inclination signal is selected so that it is larger than at least a typical oscillation frequency for the vertical translation motions and at the same time smaller than a typical frequency for the rotational motions, so that the ...

Подробнее
Номер записи: 6
12-09-2013 дата публикации

ANGULAR VELOCITY DETECTING DEVICE, ANGULAR VELOCITY DETECTING METHOD, MOVEMENT STATE DETECTING DEVICE AND NAVIGATION DEVICE

Номер: US20130238277A1
Автор: Sasakura Hiroshi, Toda Hiroyuki
Принадлежит: FURUNO ELECTRIC CO., LTD.

An angular velocity detecting device which can estimate and detect correct mounting angles of a gyro sensor is achieved using outputs from the gyro sensor. The gyro sensor measures angular velocities in a sensor coordinate system and outputs them to an angular velocity calculating unit. A bias component removing unit of the angular velocity calculating unit carries out time average processing of the sensor coordinate system angular velocities, divides the sensor coordinate system angular velocities by time average values, and outputs them to a misalignment angle estimating unit. The misalignment angle estimating unit calculates, during a period in which a movable body is turning, a roll direction misalignment angle αφ using an angular velocity ωin a pitch angle θ direction and an angular velocity ωin a heading ψ direction in the sensor coordinate system. The misalignment angle estimating unit calculates a pitch direction misalignment angle Δθ using an angular velocity ωin a roll angle φ direction and an angular velocity ωin the heading ψ direction. 1. An angular velocity detecting device mounted to a movable body and for detecting angular velocities of the movable body , comprising:a gyro sensor for measuring angular velocities in three axes perpendicular to each other in a sensor coordinate system;a misalignment angle estimating unit for estimating, based on the angular velocities in the sensor coordinate system, angular differences between the three axes of the gyro sensor perpendicular to each other and three axes of the movable body perpendicular to each other; anda coordinates converting unit for converting the angular velocities in the sensor coordinate system into angular velocities in a movable body coordinate system based on the angular differences.2. The angular velocity detecting device of claim 1 , comprising a bias component removing unit for removing bias components of the angular velocities claim 1 , wherein the misalignment angle estimating unit and ...

Подробнее
Номер записи: 7
26-09-2013 дата публикации

Inertial sensor mode tuning circuit

Номер: US20130247668A1
Автор: Janusz Bryzek
Принадлежит: Fairchild Semiconductor Corp

This document discusses, among other things, an mode matching circuit for a inertial sensor including an oscillator circuit configured to selectively couple to a sense axis of an inertial sensor and to provide sense frequency information of the sense axis, a frequency comparator configured to receive the sense frequency information of the sense axis and drive frequency information of the inertial sensor, and to provide frequency difference information to a processor, and a programmable bias source configured to apply a bias voltage to the sense axis to set a sense frequency of the sense axis in response to a command from the processor, and to maintain a desired frequency difference between the sense frequency and a drive frequency of the inertial sensor.

Подробнее
Номер записи: 8
26-09-2013 дата публикации

Managing Power Consumption of a Device with a Gyroscope

Номер: US20130253880A1
Автор: Benjamin E. Joseph, Debbie Meduna, Ian Chen
Принадлежит: Sensor Platforms Inc

A processing apparatus having one or more processors and memory generates navigational state estimates for a device having a gyroscope. The processing apparatus has a gyroscope-assisted mode of operation in which measurements from the gyroscope are used to estimate the navigational states and an alternate mode of operation in which measurements from other sensors are used to estimate the navigational state of the device. For a first time period and a subsequent transition time period, the processing apparatus estimates the navigational state of the device without sensor measurements from the gyroscope. At an end of the transition time period, the processing apparatus starts to use measurements from the gyroscope to estimate the navigational state of the device. For a second time period, after the transition time period, the processing apparatus estimates the navigational state of the device using sensor measurements from the gyroscope.

Подробнее
Номер записи: 9
05-12-2013 дата публикации

MOBILE ELECTRONIC EQUIPMENT WITH GYRO SENSOR, GYRO SENSOR CORRECTION METHOD, AND PROGRAM

Номер: US20130325386A1
Автор: Takano Satoshi
Принадлежит: NEC CASIO MOBILE COMMUNICATIONS, LTD.

A mobile electronic equipment includes a gyro sensor that detects an angular velocity, a first housing with the gyro sensor disposed therein, a second housing movably connected to the first housing, an angle formed between the respective housings being changed by movement of the first housing, and a control unit that calculates a change in an angle formed between the first housing and the second housing before and after the movement as a measured angle, based on output data of the gyro sensor. The control unit calculates a correction value for the output data of the gyro sensor based on the measured angle and a reference angle set in advance (see FIG. ). 1. A mobile electronic equipment , comprising:a gyro sensor that detects an angular velocity;a first housing with the gyro sensor disposed therein;a second housing movably connected to the first housing, an angle formed between the respective housings being changed by movement of the first housing; anda control unit that calculates change in an angle formed between the first housing and the second housing before and after a movement as a measured angle, based on output data of the gyro sensor, and calculates a correction value for the output data of the gyro sensor based on the measured angle and a reference angle set in advance.2. The mobile electronic equipment according to claim 1 , whereinthe first housing and the second housing may form a first mode and a second mode;the mobile electronic equipment further comprises:a housing angle detection unit that may detect a start and a finish of a change in an angle formed between the first housing and the second housing in each of the first mode and the second mode; andthe control unit calculates the measured angle from a value of change in angular velocity during a period of time from the start to the finish of the change in the angle.3. The mobile electronic equipment according to claim 2 , whereinwhen the housing angle detection unit detects a start of a change in ...

Подробнее
Номер записи: 10
02-01-2014 дата публикации

VIBRATORY GYROSCOPE

Номер: US20140000365A1
Автор: AALTONEN Lasse
Принадлежит:

An improved sensing device comprising micromechanical gyroscope and a feed-back loop with a controller for creating a damp control signal. A frequency generator generates a drive signal for drive mode vibration and a reference signal that is in quadrature-phase in relation to the drive mode vibration. The quadrature reference signal is summed with the damp control signal of the controller. The resulting transducer control signal is fed to the second mechanical resonator. Stable cancellation of the actual mechanical quadrature motion is achieved already at the sensing element level, before the detection of the Coriolis signal. 1. A sensing device comprising micromechanical gyroscope , the gyroscope comprising:a first mechanical resonator for drive mode vibration;a second mechanical resonator coupled to the first mechanical resonator for sense mode vibration corresponding to rotation of the sensing device; and the sensing device further comprisesa feed-back loop comprising a controller for creating a feed-back signal and an electromechanical transducer, the transducer being configured to oppose sense mode vibration of the second mechanical resonator according to an input control signal;a frequency generator for generating a drive signal for drive mode vibration and a reference signal that is in quadrature-phase in relation to the drive mode vibration;a summing element configured to sum the quadrature reference signal with a output signal of the controller to be fed as feedback signal to the second mechanical resonator.2. A sensing device according to claim 1 , wherein the summing element is a weighted summing element.3. A sensing device according to claim 2 , wherein weights of the summed signals have been adjusted during manufacturing of the sensing device.4. A sensing device according to claim 1 , wherein the sensing device further comprises a detection unit and a quadrature signal amplitude controller;the detection unit is configured to input a sensed signal, and ...

Подробнее
Номер записи: 11
20-02-2014 дата публикации

ANALOG MULTIPLIER CIRCUIT, VARIABLE GAIN AMPLIFIER, DETECTOR CIRCUIT, AND PHYSICAL QUANTITY SENSOR

Номер: US20140047920A1
Автор: Nagata Yoichi
Принадлежит:

Provided is a technology capable of preventing arithmetic operation accuracy from deteriorating even when a bipolar transistor used to form a Gilbert multiplier core has poor characteristics. A correction current generating circuit () uses a constant current source () to feed a constant current Ito an emitter of a bipolar transistor (Q7) being a first replica transistor having the same current gain α as bipolar transistors (Q1 to Q4) that form the Gilbert multiplier core (), to generate a current of α·Ion a collector side thereof. The current is output as a correction current α·I, and is added to each of one of input signals (±K1·Vy) of the Gilbert multiplier core () as a bias current, to thereby eliminate influence of the current gain α on an output signal being a multiplication result. 19-. (canceled)10. An analog multiplier circuit , comprising:a multiplier core comprising at least one differential transistor pair including a pair of emitter-coupled bipolar transistors, in which a coupled emitter point of the at least one differential transistor pair is set as a first input terminal, two bases of the differential transistor pair are set as a pair of second input terminals, and two collectors of the differential transistor pair are set as a pair of output terminals;a linearizer circuit comprising a linearizing transistor pair including a pair of bipolar transistors whose emitters are respectively connected to the second input terminal pair, in which each base and each collector of the linearizing transistor pair are each connected to a predetermined power source; anda correction current generating circuit for adding a correction current corresponding to a current gain of each of the bipolar transistors of the at least one differential transistor pair to a signal applied to the second input terminal pair, the current gain being defined by a ratio of a collector current to an emitter current.11. The analog multiplier circuit according to claim 10 , wherein the ...

Подробнее
Номер записи: 12
03-01-2019 дата публикации

METHOD AND APPARATUS FOR AN INCREASED GYROSCOPIC RATE SENSOR

Номер: US20190000344A1
Автор: BYMAN DAVID K., Rizun Peter R.
Принадлежит:

A sensor module includes multiple accelerometers mounted in a non-collinear arrangement onto a printed circuit board. A processor obtains linear acceleration vectors from each of the accelerometers and through the constraint imposed by the the non-collinear arrangement of the accelerometers onto the printed circuit board, the angular velocity vector of the sensor may be derived by the processor from the linear acceleration vectors. 1. A method of configuring a sensor , comprising:disposing a plurality of accelerometers into a geometric arrangement within the sensor;measuring a linear acceleration of the sensor using each of the plurality of accelerometers; andusing the linear acceleration measurements from each of the plurality of accelerometers to estimate an angular velocity of the sensor.2. The method of claim 1 , wherein the plurality of accelerometers includes first claim 1 , second and third accelerometers.3. The method of claim 2 , wherein a first displacement vector extending between the first and second accelerometers is non-collinear with respect to a second displacement vector extending between the first and third accelerometers.4. The method of claim 3 , wherein the first displacement vector forms a right angle with respect to the second displacement vector.5. The method of claim 1 , wherein the plurality of accelerometers are disposed in relation to a printed circuit board within the sensor.6. The method of claim 1 , wherein the plurality of accelerometers are coplanar with the printed circuit board.7. The method of claim 1 , wherein the angular velocity estimate is formed by constraining the linear acceleration measurements from each of the plurality of accelerometers to the geometric arrangement.8. The method of claim 1 , wherein angular velocities of the sensor may be estimated up to 8000 degrees per second.9. A sensor claim 1 , comprising:a printed circuit board;a plurality of accelerometers disposed into a geometric arrangement onto the printed ...

Подробнее
Номер записи: 13
07-01-2016 дата публикации

FREQUENCY READOUT GYROSCOPE

Номер: US20160003618A1
Автор: Boser Bernhard E., Kline Mitchell H.
Принадлежит: The Regents of the University of California

A frequency readout gyroscope is provided, having 2 or 3 axes, in which the frequency of the carrier associated with the oscillation of the proof mass changes while the amplitude stays constant. The invention departs from conventional gyroscopes which rely on measuring transducer sense axis displacement (amplitude modulation) to determine angular input rate. The invention utilizes what could be termed a form of frequency modulation, such as evaluating frequency phase difference between the axes of modulation. Examples include gyroscopes having either a quadrature or Lissajous FM mode of operation, in which angle random walk contribution from the electronics is reduced by approximately two orders of magnitude. 1. An electromechanical system , comprising:a mechanical resonator having a first mode of vibration and an associated first natural frequency, and a second mode of vibration having an associated second natural frequency, wherein angular rate of motion input couples energy between said first mode of vibration and said second mode of vibration;sensors and actuators for each of the first mode and the second mode for transduction of an electrical signal into a mechanical vibration and transduction of a mechanical vibration into an electrical signal;sustaining circuitry connected to the sensors and actuators to maintain substantially constant, non-zero velocity amplitude vibrations in the first mode at a first oscillation frequency and the second mode at a second oscillation frequency; andoutput circuitry to infer an angular rate of motion from mechanical velocity or displacement of said first mode or said second mode, or both said first mode and said second mode.2. The electromechanical system of claim 1 , wherein the substantially constant claim 1 , non-zero velocity amplitude vibrations are substantially equal velocity claim 1 , or displacement amplitude claim 1 , or both velocity and displacement amplitude.3. The electromechanical system of claim 1 , wherein the ...

Подробнее
Номер записи: 14
04-01-2018 дата публикации

MICROELECTROMECHANICAL GYROSCOPE WITH COMPENSATION OF QUADRATURE SIGNAL COMPONENTS

Номер: US20180003504A1
Автор: Donadel Andrea, Garbarino Marco, Magnoni Davide
Принадлежит:

A gyroscope includes: a mass, which is movable with respect to a supporting body; a driving loop for keeping the mass in oscillation according to a driving axis; a reading device, which supplying an output signal indicating an angular speed of the body; and a compensation device, for attenuating spurious signal components in quadrature with respect to a velocity of oscillation of the mass. The reading device includes an amplifier, which supplies a transduction signal indicating a position of the mass according to a sensing axis. The compensation device forms a control loop with the amplifier, extracts from the transduction signal an error signal representing quadrature components in the transduction signal, and supplies to the amplifier a compensation signal such as to attenuate the error signal. 1. A device , comprising:a supporting body;a sensing mass coupled to the supporting body and movable with respect to the supporting body according to a driving axis and a sensing axis;a driving circuit that separately outputs a driving signal, a compensation conversion signal, and a reading conversion signal, the sensing mass receives the driving signal to maintain the sensing mass in oscillation according to the driving axis;a reading circuit coupled to the sensing mass, the reading circuit generates an internal transduction signal representative of a position of the sensing mass according to the sensing axis, receives the reading conversion signal, and generates an output signal representative of an angular speed of the supporting body based on the transduction signal and the reading conversion signal; anda compensation circuit coupled to the reading circuit in a feedback loop, the compensation circuit receives the transduction signal and the compensation conversion signal, and generates a compensation signal based on the received transduction signal and the compensation conversion signal.2. The device of claim 1 , further comprising:a driving mass elastically coupled to ...

Подробнее
Номер записи: 15
02-01-2020 дата публикации

DIGITAL CANCELATION OF CLOCK JITTER INDUCED NOISE

Номер: US20200003560A1
Автор: Ezekwe Chinwuba, Mayer Thomas
Принадлежит:

A system for processing signals from a gyroscope includes at least one drive channel and at least one sense channel. The drive channel includes an analog-to-digital converter (ADC), an in-phase demodulator, at least one filter and a phase-locked loop. The sense channel includes an ADC, an in-phase demodulator, a quadrature-phase demodulator, and filters for the in-phase and quadrature-phase demodulators. The system includes a digital subtraction circuit subtract an in-phase component of the drive signal from the drive channel from an in-phase component of the rate signal from the sense channel to generate a sense axis output signal. 1. A system for processing signals from a gyroscope , comprising: a drive channel analog-to-digital converter (ADC) that receives a drive signal from the drive channel and outputs a digitized drive signal;', 'a drive channel in-phase demodulator that receives the digitized drive signal and generates an in-phase demodulated drive signal;', 'at least one drive channel filter that receives the in-phase demodulated drive signal and outputs a filtered in-phase demodulated drive signal; and', 'a phase-locked loop (PLL);, 'at least one drive channel configured to receive an output of a drive axis of the gyroscope, the at least one drive channel including a sense channel ADC that receives an analog rate signal from the sense channel and outputs a digitized rate signal; and', a sense channel in-phase demodulator that receives the digitized rate signal and generates an in-phase demodulated rate signal;', 'a sense channel quadrature-phase demodulator that receives the digitized rate signal and generates a quadrature-phase demodulated rate signal;', 'a first sense channel filter that receives the in-phase demodulated rate signal and outputs a filtered in-phase demodulated rate signal; and', 'a second sense channel filter that receives the quadrature-phase demodulated rate signal and outputs a filtered quadrature-phase demodulated rate signal; and, ' ...

Подробнее
Номер записи: 16
14-01-2016 дата публикации

Mems gyro motor loop filter

Номер: US20160010994A1
Автор: John F. Ackerman
Принадлежит: Honeywell International Inc

A motor drive loop circuit for a micro-electro-mechanical system (MEMS) gyroscope is provided. The motor drive loop circuit includes a motor configured to drive a proof mass in the MEMS gyroscope and a minus-90-degree phase-shift twin-tee notch filter. The motor is configured to cause the proof mass to oscillate at a primary-proof-mass mode. The a minus-90-degree phase-shift twin-tee notch filter is configured to: provide a minus 90 degree phase at a motor resonance frequency equal to the primary-proof-mass mode; suppress resonance at undesired mechanical modes of the motor during a startup of the motor; and provide gain at the motor resonance frequency.

Подробнее
Номер записи: 17
14-01-2021 дата публикации

Angle Random Walk Minimization for Frequency Modulated Gyroscopes

Номер: US20210010810A1
Автор: Sabater Andrew B.
Принадлежит: United States of America as represented by Secretary of the Navy

Compared to amplitude modulated gyroscopes, frequency modulated (FM) gyroscopes have demonstrated excellent long-term stability. A notable limitation with FM gyroscopes is FM operation can decrease short-term stability. Short-term stability is typically quantified via angle random walk (ARW). The present disclosure provides an FM gyroscope ARW minimization method. 2. The method of claim 1 , wherein n=m.3. The method of claim 2 , wherein the PLL is set at the respective first mode phase the number n times between 0° and −180°.4. The method of claim 3 , wherein the PLL is set at the respective first mode phase the number n times at increments of at least 1°.5. The method of claim 4 , wherein driving claim 4 , via a first mode PLL set at first mode phase claim 4 , a first mode of the dual mode resonator comprises driving the first mode of the dual mode resonator of a quadruple mass gyroscope.6. The method of claim 5 , wherein Δf is at least 100 Hz.8. The method of claim 1 , wherein the PLL is set at the respective first mode phase the number n times between 0° and −180°.9. The method of claim 8 , wherein the PLL is set at the respective first mode phase the number n times at increments of at least 1°.10. The method of claim 9 , wherein driving claim 9 , via a first mode PLL set at first mode phase claim 9 , a first mode of the dual mode resonator comprises driving the first mode of the dual mode resonator of a quadruple mass gyroscope.11. The method of claim 10 , wherein Δf is at least 100 Hz.13. The method of claim 1 , wherein the PLL is set at the respective first mode phase the number n times at increments of at least 1°.14. The method of claim 13 , wherein driving claim 13 , via a first mode PLL set at first mode phase claim 13 , a first mode of the dual mode resonator comprises driving the first mode of the dual mode resonator of a quadruple mass gyroscope.15. The method of claim 14 , wherein Δf is at least 100 Hz.17. The method of claim 1 , wherein the PLL is set ...

Подробнее
Номер записи: 18
18-01-2018 дата публикации

GYROSCOPE LOOP FILTER

Номер: US20180017388A1
Автор: CLIFFORD Andrew, Townsend Kevin, WILKINSON Nicholas
Принадлежит:

There is provided a method of sensing a rotation rate using a vibrating structure gyroscope, said gyroscope comprising an electronic control system comprising one or more control loops, wherein at least one of said control loops comprises a filter having a variable time constant, said method comprising the steps of: determining or estimating a characteristic of the vibrating structure of said gyroscope; and adapting or varying said time constant of said filter with the determined or estimated characteristic of said vibrating structure. 1. A method of sensing a rotation rate using a vibrating structure gyroscope , said gyroscope comprising an electronic control system comprising one or more control loops , wherein at least one of said control loops comprises a filter having a variable time constant , said method comprising the steps of:determining a characteristic of the vibrating structure of said gyroscope; andvarying said time constant of said filter with the determined characteristic of said vibrating structure.2. The method as claimed in claim 1 , wherein said characteristic comprises the frequency claim 1 , Q-factor or bandwidth of the vibrating structure.3. The method as claimed in claim 1 , wherein said step of determining or estimating a characteristic of said vibrating structure comprises measuring a temperature of said vibrating structure.4. The method as claimed in claim 1 , wherein said step of adapting or varying said time constant of said filter comprises tracking said characteristic of the vibrating structure.5. The method as claimed in claim 1 , wherein said gyroscope comprises a primary axis and a secondary axis claim 1 , and said control loop detects and/or controls motion on said secondary axis of said gyroscope.6. The method as claimed in claim 5 , further comprising causing said vibrating element to vibrate along said primary axis claim 5 , and measuring the response of the vibrating element in said secondary axis so as to give a measure of the ...

Подробнее
Номер записи: 19
22-01-2015 дата публикации

APPARATUS FOR DRIVING GYRO SENSOR AND CONTROL METHOD THEREOF

Номер: US20150020589A1
Автор: Choi Young Kil, Kim Chang Hyun, KIM Sung Tae, Na Jun Kyung, Pyo Seung Chul
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

Disclosed herein is an apparatus for driving a gym sensor including a driving displacement signal processing unit, a sensing signal processing unit and an automatic quadrature signal controller configured to control the variable resistor through digital correction when a quadrature signal exists, and minimize an amplitude of the quadrature signal. 1. An apparatus for driving a gym sensor , the apparatus comprising:a driving displacement signal processing unit configured to receive first and second driving displacement signals from a gym sensor, generate first and second clock signals by using the first and second driving displacement signals, and subsequently apply a driving signal generated by using the second clock signal to the gyro sensor;a sensing signal processing unit configured to receive first and second sensing signals from the gyro sensor, generate third and fourth sensing signals by mixing the first and second sensing signals and the first and second displacement signals by using a variable resistor such that a quadrature signal included in the first and second sensing signals is reduced, and detect a gyro signal from the third and fourth sensing signals; andan automatic quadrature signal controller configured to determine whether a quadrature signal exists in the third and fourth sensing signals, control the variable resistor through digital correction when a quadrature signal exists, and minimize an amplitude of the quadrature signal.2. The apparatus as set forth in claim 1 , wherein the driving displacement signal processing unit generates the first clock signal phase-locked to the first driving displacement signal and the second clock signal obtained by shifting a phase of the first driving displacement signal by 90° claim 1 , through a comparator.3. The apparatus as set forth in claim 1 , wherein the quadrature signal includes a first quadrature signal and a second quadrature signal claim 1 ,wherein the first quadrature signal is mixed with the ...

Подробнее
Номер записи: 20
21-01-2021 дата публикации

NAVIGATION DEVICES

Номер: US20210020053A1
Автор: JIANG Yiping, LAI Zhenzhou, Song Jianyu, TAO Yongkang
Принадлежит: SZ DJI Technology Co., Ltd.

A movable object includes a plurality of actuation devices configured to move the movable object, a processor configured to control the actuation devices and the movements of the movable object, and at least one sensor. The sensor has a coordinate system not substantially in alignment with a coordinate system of the movable object. The sensor senses the state of the movable object and the processor controls the propulsion devices and the movements of the movable object based on the sensed state. 1. A movable object , comprising:a plurality of actuation devices configured to move the movable object;a processor configured to control the actuation devices and the movements of the movable object; andat least one sensor, the sensor having a coordinate system not substantially in alignment with a coordinate system of the movable object,wherein the sensor senses the state of the movable object and the processor controls the propulsion devices and the movements of the movable object based on the sensed state.2. The movable object of claim 1 , wherein the at least one sensor comprises a micro-electromechanical system (MEMS) sensor.3. The movable object of claim 1 , wherein the at least one sensor comprises one or more of a three-axis accelerometer claim 1 , a three-axis gyroscope claim 1 , a two-axis accelerometer claim 1 , a six-axis sensor including a three-axis accelerometer and a three-axis gyroscope claim 1 , or a compass.4. The movable object of claim 1 , wherein the at least one sensor comprises a three-axis sensor claim 1 , wherein one of three axes of the sensor is parallel to an axis of the movable object's coordinate system claim 1 , or none of three axes of the sensor is parallel to any axis of the movable object's coordinate system.5. The movable object of claim 1 , wherein the at least one sensor is mounted on the movable object such that a sensing range in a vertical direction in the movable object's coordinate system is greater than a sensing range along any ...

Подробнее
Номер записи: 21
26-01-2017 дата публикации

Gyroscope that Compensates for Fluctuations in Sensitivity

Номер: US20170023364A1
Автор: Gregory Jeffrey A.
Принадлежит:

A method compensates for a sensitivity of an inertial sensor having a resonator and an accelerometer. The method includes adding a test signal to a quadrature tuning voltage applied to the resonator of the inertial sensor. The method also includes receiving a quadrature error signal from the accelerometer of the inertial sensor. The method also includes detecting a phase difference between the quadrature error signal and the test signal. The method also includes determining a bandwidth of the accelerometer based on the detected phase difference, the bandwidth indicating the sensitivity of the accelerometer. 1. In an inertial sensor having a resonator and an accelerometer , a method of measuring sensitivity of the accelerometer , the method comprising:adding a test signal to a quadrature tuning voltage applied to the resonator of the inertial sensor;receiving a quadrature error signal from the accelerometer of the inertial sensor;detecting a phase difference between the quadrature error signal and the test signal; anddetermining a bandwidth of the accelerometer based on the detected phase difference, the bandwidth indicating the sensitivity of the accelerometer.2. The method of claim 1 , further comprising:removing errors, caused by fluctuations in sensitivity of the accelerator, from an output rate signal of the accelerometer according to the determined bandwidth of the accelerometer.3. The method of claim 1 , wherein determining the bandwidth of the accelerometer comprises:determining a time constant τ of the accelerometer based on the detected phase difference.4. The method of claim 3 ,wherein the output rate signal is represented by xAgτΩ, andwherein the method further comprises removing errors, caused by fluctuations in sensitivity of the accelerator, from an output rate signal of the accelerometer according to the determined bandwidth of the accelerometer, by multiplying the output rate signal by the inverse of the determined time constant.5. The method of ...

Подробнее
Номер записи: 22
23-01-2020 дата публикации

MICROELECTROMECHANICAL GYROSCOPE WITH REJECTION OF DISTURBANCES AND METHOD OF SENSING AN ANGULAR RATE

Номер: US20200025567A1
Автор: Andersson Gert Ingvar, Brunetto Matteo Fabio, Hedenstierna Nils Einar, Svensson Erik Daniel, Valzasina Carlo, Zhang Huantong
Принадлежит:

A gyroscope includes a substrate, a first structure, a second structure and a third structure elastically coupled to the substrate and movable along a first axis. The first and second structure are arranged at opposite sides of the third structure with respect to the first axis A driving system is configured to oscillate the first and second structure along the first axis in phase with one another and in phase opposition with the third structure. The first, second and third structure are provided with respective sets of sensing electrodes, configured to be displaced along a second axis perpendicular to the first axis in response to rotations of the substrate about a third axis perpendicular to the first axis and to the second axis. 1. A microelectromechanical gyroscope comprising:a substrate; anda first structure, a second structure and a third structure, each of the first, the second, and the third structures elastically coupled to the substrate to be movable in a driving direction along a first axis, the first structure and the second structure being arranged at opposite sides of the third structure with respect to the first axis,wherein the third structure is symmetrical about a first centerline extending along the first axis.2. The gyroscope of claim 1 , further comprising:a driving system configured to oscillate the first structure and the second structure along the first axis in phase with one another and to oscillate the third structure along the first axis in phase opposition with the first structure and the second structure.3. The gyroscope of wherein each of the first structure claim 1 , the second structure claim 1 , and the third structure includes a plurality of movable sensing electrodes configured to be displaced in a sensing direction along a second axis perpendicular to the first axis in response to rotations of the substrate about a third axis perpendicular to the first axis and to the second axis.43. The gyroscope wherein each of the first ...

Подробнее
Номер записи: 23
25-01-2018 дата публикации

CIRCUIT DEVICE, ELECTRONIC DEVICE, PHYSICAL QUANTITY SENSOR, AND VEHICLE

Номер: US20180026617A1
Автор: Haneda Hideo
Принадлежит:

A circuit device includes a comparator and a flag signal generation circuit. The comparator includes a first voltage-time conversion circuit to which at least a first input signal is input and which outputs a first time information signal, a second voltage-time conversion circuit to which at least a second input signal is input and which outputs a second time information signal, and a determination circuit that determines magnitude relation of the first input signal and the second input signal, based on the first time information signal and the second time information signal. The flag signal generation circuit generates a flag signal indicating that a voltage difference between the first input signal and the second input signal is a predetermined voltage or less, based on the first time information signal and the second time information signal. 1. A circuit device comprising:a comparator being configured to perform a comparison operation of input signals; anda flag signal generation circuit being configured to generate a flag signal used for controlling the comparison operation, a first voltage-time conversion circuit being configured to receive at least a first input signal and output a first time information signal,', 'a second voltage-time conversion circuit being configured to receive at least a second input signal and output a second time information signal, and', 'a determination circuit being configured to determine a magnitude relation of the first input signal and the second input signal, based on the first time information signal from the first voltage-time conversion circuit, and the second time information signal from the second voltage-time conversion circuit, and, 'wherein the comparator includes'}wherein the flag signal generation circuit generates the flag signal indicating that a voltage difference between the first input signal and the second input signal is a predetermined voltage or less, based on the first time information signal and the second ...

Подробнее
Номер записи: 24
05-02-2015 дата публикации

Mems device

Номер: US20150033855A1
Автор: Biao Zhang, Tao Ju
Принадлежит: INSIGHTECH LLC

A MEMS gyroscope is disclosed herein, wherein the MEMS gyroscope comprised a magnetic sensing mechanism and a magnetic source that is associated with the proof-mass. The magnetic sensing mechanism comprises multiple magnetic field sensors that are designated for sensing the magnetic field from a magnetic source so as to mitigate the problems caused by fabrication.

Подробнее
Номер записи: 25
05-02-2015 дата публикации

Inertial force sensor

Номер: US20150033858A1
Автор: Isao Hattori, Satoshi Ohuchi, Takeshi Uemura, Yasunobu Tsukio
Принадлежит: Panasonic Intellectual Property Management Co Ltd

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.

Подробнее
Номер записи: 26
31-01-2019 дата публикации

DEVICE AND METHOD FOR MAINTAINING THE ATTITUDE OF A CARRIER USING GYROSCOPES

Номер: US20190033076A1
Автор: BUDIN Joël, PINTURAUD Arnaud, PONSSARD Clément, WOISELLE Arnaud
Принадлежит: SAFRAN ELECTRONICS & DEFENSE

The invention relates to a device for maintaining the attitude of a carrier, the device comprising three primary gyroscopes () that are arranged to measure primary speeds of rotation (Rbc) of a carrier about three primary axes, a secondary gyroscope () that is arranged to measure a secondary speed of rotation (Rhp) of the carrier about a secondary axis that is different from each of the primary axes, a video camera () having an optical axis that is different from each of the primary axes, and a data processing module () that is configured to estimate scale-factor and drill errors that corrupt the primary speeds of rotation (Rbc) using data issued from the secondary speed of rotation (Rhp) and images acquired by the video camera (), and to correct the primary speeds of rotation with said estimated errors. 117-. (canceled)18. A device for maintaining the attitude of a carrier , the device comprising:three primary gyroscopes arranged to measure primary rotation speeds of a carrier around three primary axes,a secondary gyroscope arranged to measure a secondary rotation speed of the carrier around a secondary axis different to each of the primary axes,a camera presenting an optical axis different to each of the primary axes, estimate scale-factor and drift errors which jeopardize the primary rotation speeds from data originating from the secondary rotation speed and images acquired by the camera, and', 'correct the primary rotation speeds with said estimated errors., 'a data-processing module configured to'}19. The device according to claim 18 , wherein the data-processing module comprises a hybridizing filter claim 18 , such as a Kalman filter claim 18 , configured to estimate the scale-factor and drift errors from the data originating from the secondary rotation speed and images acquired by the camera.20. The device according to claim 18 , wherein the optical axis of the camera is parallel to the secondary axis.21. The device according to claim 20 , wherein the ...

Подробнее
Номер записи: 27
04-02-2021 дата публикации

SIGNAL PROCESSING

Номер: US20210033399A1
Автор: Sheard John Keith, Williamson Matthew
Принадлежит:

A method of demodulating a MEMS sensor pickoff signal from a vibrating resonator of said sensor, the method comprising: sampling the pickoff signal with an asynchronous ADC at a sampling rate of at least 50 times the resonant frequency of the resonator to generate a stream of samples; generating a first value by combining samples from said stream of samples according to a selected operation, said operation being selected in dependence on a synchronous clock signal that is synchronous to the resonant frequency of the resonator, said synchronous clock signal having a frequency at least twice the resonant frequency of the resonator; and counting the number of samples contributing to the first value. The increased sampling rate of the pickoff signal allows a much higher number of samples to be taken into account, thereby reducing noise. However, the ADC asynchronously from the resonator of the MEMS sensor. 1. A method of demodulating a MEMS sensor pickoff signal from a vibrating resonator of said sensor , the method comprising:sampling the pickoff signal with an asynchronous ADC at a sampling rate of at least 50 times the resonant frequency of the resonator to generate a stream of samples;generating a first value by combining samples from said stream of samples according to a selected operation, said operation being selected in dependence on a synchronous clock signal that is synchronous to the resonant frequency of the resonator, said synchronous clock signal having a frequency at least twice the resonant frequency of the resonator; andcounting the number of samples contributing to the first value.2. The method as claimed in claim 1 , wherein the selected operation is selected from:i) adding the sample to the first value,ii) ignoring the sample, andiii) subtracting the sample from the first value.3. The method as claimed in claim 1 , wherein the synchronous clock signal has a frequency at least four times the resonant frequency of the resonator.4. The method as claimed ...

Подробнее
Номер записи: 28
08-02-2018 дата публикации

MEMS GYROSCOPE WITH FREQUENCY REGULATION AND ELECTROSTATIC CANCELLATION OF THE QUADRATURE ERROR

Номер: US20180038692A1
Автор: Chiarillo Tiziano, Franco Pasquale, PRATI Daniele, Valzasina Carlo
Принадлежит:

A MEMS gyroscope, wherein a suspended mass is mobile with respect to a supporting structure. The mobile mass is affected by quadrature error caused by a quadrature moment; a driving structure is coupled to the suspended mass for controlling the movement of the mobile mass in a driving direction at a driving frequency. Motion-sensing electrodes, coupled to the mobile mass, detect the movement of the mobile mass in the sensing direction and quadrature-compensation electrodes are coupled to the mobile mass to generate a compensation moment opposite to the quadrature moment. The gyroscope is configured to bias the quadrature-compensation electrodes with a compensation voltage so that the difference between the resonance frequency of the mobile mass and the driving frequency has a preset frequency-mismatch value. 1. A MEMS gyroscope , comprising:a supporting structure;a mass mobile with respect to the supporting structure in a driving direction and in a sensing direction, perpendicular to each other, the mobile mass being affected by a quadrature error caused by a quadrature moment;a driving structure coupled to the mobile mass and configured to control movement of the mobile mass in the driving direction at a driving frequency, the mobile mass having a variable resonance frequency that differs from the driving frequency by a frequency mismatch;motion-sensing electrodes coupled to the mobile mass and configured to detect movement of the mobile mass in the sensing direction; andquadrature-compensation electrodes coupled to the mobile mass and configured to generate a compensation moment opposite to the quadrature moment; anda compensation controller configured to bias the quadrature-compensation electrodes with at least one compensation voltage such as to drive the mobile mass at a preset frequency mismatch.2. The gyroscope of claim 1 , wherein the at least one compensation voltage is variable quadratically with the quadrature error.5. The gyroscope of claim 1 , wherein ...

Подробнее
Номер записи: 29
07-02-2019 дата публикации

INERTIAL FORCE DETECTION DEVICE

Номер: US20190041214A1
Автор: Hayashi Masahide, Nakamura Toshiaki, Ono Kazuo, TSURU Yasutaka
Принадлежит: Hitachi Automotive Systems, Ltd.

The present invention addresses the problem of providing an inertial force detection device with which it is possible to diagnose sensor output without hindrance even when a vehicle is traveling. In order to solve this problem, there is provided an inertial force detection device for measuring inertial force according to a displacement amount of an oscillating body, wherein a diagnosis voltage that is synchronous with an output command signal inputted from the outside is applied. Furthermore, the period over which the diagnosis voltage is applied is shorter, by a prescribed period, than a cycle of the output command signal. Furthermore, at least one of the period over which the diagnosis voltage is applied, the diagnosis voltage, a diagnosis threshold value, and a filter characteristic is varied according to the cycle of the output command signal. 1. An inertial force detection device that measures an inertial force based on a displacement amount of an oscillator ,the inertial force detection device applying a diagnosis voltage in synchronization with an output instruction signal input from outside.2. The inertial force detection device according to claim 1 , whereina period during which the diagnosis voltage is applied is shorter than a cycle of the output instruction signal by a predetermined period.3. The inertial force detection device according to claim 1 , whereinat least one of the period during which the diagnosis voltage is applied, the diagnosis voltage, a diagnosis threshold value, a filter characteristic is changed in accordance with the cycle of the output instruction signal.4. The inertial force detection device according to claim 1 , whereinwhen the cycle of the output instruction signal is sufficient to apply the positive and negative diagnosis voltages, both positive and negative diagnosis voltages are applied during one cycle of the output instruction signal, andwhen the cycle of the output instruction signal is not sufficient to apply the positive ...

Подробнее
Номер записи: 30
12-02-2015 дата публикации

INERTIAL FORCE SENSOR AND ELECTRONIC DEVICE USING SAME

Номер: US20150046737A1
Автор: Hattori Isao, Uemura Takeshi
Принадлежит:

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. 1. An inertial force sensor comprising:a sensor element configured to convert an inertial force into an electrical signal;a sensor signal processor connected to the sensor element and configured to receive the electrical signal and output an inertial force value; anda power controller configured to control electric power supply to the sensor signal processor, based on the inertial force value,wherein when the inertial force value is maintained for a predetermined time period within a predetermined range in which a reference value is a middle value of the range, the power controller after a lapse of the predetermined time period is configured to reduce the electric power supply to the sensor signal processor and update the reference value to the inertial force value obtained after the lapse of the predetermined time period.2. The inertial force sensor of claim 1 , wherein when the inertial force value exceeds the predetermined range in which the reference value is the middle value of the range claim 1 , the power controller is configured to lengthens the predetermined time period.3. The inertial force sensor of claim 1 , wherein when the inertial force value exceeds the predetermined range in which the reference value is the middle value of the ...

Подробнее
Номер записи: 31
25-02-2016 дата публикации

System and method for drop detection

Номер: US20160054354A1
Автор: James Lim, William Kerry Keal
Принадлежит: InvenSense Inc

A system and method for reliably detecting when a device has been dropped. In a non-limiting example, a drop detection system may be operable to perform one or more of: fall detection, end-of-fall detection, and/or detection of no motion after the fall. The drop detection system may, for example, analyze information from one or more MEMS sensors on-board the device to detect when the device has been dropped.

Подробнее
Номер записи: 32
13-02-2020 дата публикации

MACHINE LEARNING ZERO-RATE LEVEL CALIBRATION

Номер: US20200049504A1
Автор: Rizzardini Federico
Принадлежит:

One or more embodiments are directed to zero-rate level compensation systems. One such system includes stationary detection circuitry that receives gyroscope signals output by a gyroscope and determines whether the gyroscope is stationary based on the gyroscope signals. The stationary detection circuitry generates a stationary gyroscope signal indicating the gyroscope is stationary based on a determination that the gyroscope is stationary. A temperature sensor senses temperature and outputs temperature signals. Zero-rate level estimation circuitry receives the stationary gyroscope signal and a temperature signal associated with the stationary gyroscope signal, and iteratively estimates one or more zero-rate level compensation parameters based on the stationary gyroscope signal and the temperature signal. 1. A system , comprising:a gyroscope; receives gyroscope signals output by the gyroscope,', 'determines whether the gyroscope is stationary based on the gyroscope signals, and', 'generates a stationary gyroscope signal based on a determination that the gyroscope is stationary;, 'stationary detection circuitry which, in usea temperature sensor which, in use, senses temperature and outputs temperature signals; andzero-rate level estimation circuitry which, in use, receives the stationary gyroscope signal and a temperature signal associated with the stationary gyroscope signal, and iteratively estimates one or more zero-rate level compensation parameters based on the stationary gyroscope signal and the temperature signal.2. The system of claim 1 , comprising:gyroscope compensation circuitry which, in use, receives the gyroscope signals output by the gyroscope and compensates the gyroscope signals based on the one or more zero-rate level compensation parameters.3. The system of claim 1 , comprising: receives the stationary gyroscope signal,', 'receives the temperature signal associated with the stationary gyroscope signal,', 'determines whether the temperature signal ...

Подробнее
Номер записи: 33
22-02-2018 дата публикации

DEVICE AND METHOD FOR SENSOR CALIBRATION

Номер: US20180052007A1
Автор: Huang Chunchieh, Kim Bongsang, TEA NIM HAK, TESKEY WESLEY JAMES EMMANOUEL
Принадлежит:

A device and method for a MEMS device with at least one sensor is disclosed. A thermal element is disposed in the MEMS device to selectively adjust a temperature of the MEMS device. A calibration operation is initiated for the sensor to determine a correction value to be applied to the sensor measurement based on the temperature. The correction value is stored. 1. A device , comprising:a MEMS device with at least one sensor; anda thermal element disposed in the MEMS device, the thermal element configured to selectively adjust a temperature of the MEMS device.2. The device of claim 1 , wherein a circuit board is disposed adjacent the thermal element and the MEMS device is attached to the circuit board.3. The device of claim 2 , wherein an adhesive layer is disposed between the MEMS device and the circuit board to attach the MEMS device to the circuit board.4. The device of claim 1 , wherein the thermal element is disposed in an IC layer of the MEMS device.5. The device of claim 1 , wherein a device thermal spreader is disposed over the MEMS device to substantially maintain a uniform temperature about a top surface of the MEMS device.6. The device of claim 2 , wherein at least one board thermal spreader is disposed about the circuit board to substantially maintain a uniform temperature about the circuit board.7. The device of claim 6 , wherein the at least one board thermal spreader is disposed within the circuit board.8. The device of claim 7 , wherein the circuit board is a laminate board with at least one thermally conductive layer claim 7 , the at least one thermally conductive layer configured to be a board thermal spreader.9. The device of claim 4 , wherein the IC layer includes a device region and a buffer region surrounding the device region claim 4 , and the thermal element is disposed in the buffer region.10. The device of claim 9 , wherein the thermal element includes a first thermal element and a second thermal element claim 9 , the first thermal element ...

Подробнее
Номер записи: 34
26-02-2015 дата публикации

System And Method For Gyroscope Zero-Rate-Offset Drift Reduction Through Demodulation Phase Error Correction

Номер: US20150057959A1
Автор: Ezekwe Chinwuba D.
Принадлежит: ROBERT BOSCH GMBH

A circuit for processing signals from a gyroscope includes a first that generates an in-phase demodulated signal and a second demodulator that generates a quadrature-phase demodulated signal with reference to in-phase and quadrature-phase modulated signals, respectively, from the gyroscope. The circuit includes a digital processor that receives the demodulated in-phase and quadrature phase signals from the demodulators and generates an output signal corresponding to a rotation of the gyroscope along a predetermined axis with reference to the in-phase demodulated signal and the quadrature-phase demodulated signal to remove a portion of the quadrature-phase signal from the in-phase signal. 1. A circuit for processing signals from a gyroscope comprising:a first demodulator configured to receive a modulated signal from an output of a sensing element in the gyroscope, the first demodulator generating an in-phase demodulated signal with reference to the modulated signal;a second demodulator configured to receive the modulated signal from the output of the sensing element in the gyroscope, the second demodulator generating a quadrature-phase demodulated signal with reference to the modulated signal; and 'generate an output signal corresponding to a rotation of the gyroscope along a predetermined axis with reference to the in-phase demodulated signal and the quadrature-phase demodulated signal to remove a portion of the quadrature-phase signal from the in-phase signal.', 'a digital processor configured to receive the demodulated in-phase signal from an output of the first demodulator and the demodulated quadrature-phase signal from an output of the second demodulator, the digital processor being configured to2. The circuit of claim 1 , the digital processor being further configured to:generate a scaled datum corresponding to a product of a datum of the quadrature-phase signal multiplied by a scaling factor to reduce an absolute value of the digital datum;generate the output ...

Подробнее
Номер записи: 35
25-02-2016 дата публикации

OFFSET ESTIMATION APPARATUS, OFFSET ESTIMATION METHOD, AND COMPUTER READABLE MEDIUM

Номер: US20160057269A1
Автор: KOBAYASHI Shiro, KONDA Masahiro, MASUDA Tsuyoshi
Принадлежит: ASAHI KASEI KABUSHIKI KAISHA

To quickly and accurately measure offset of an angular velocity sensor mounted in a mobile device, provided is an offset estimation apparatus including an acquiring section that acquires an output signal of an angular velocity sensor mounted in a mobile device; an offset estimating section that estimates an offset of the angular velocity sensor based on a first AC component included in the output signal of the angular velocity sensor in a period during which a level of the first AC component cycles; a hold state judging section that judges a hold state of the mobile device; and a control section that controls whether the offset estimating section estimates the offset of the angular velocity sensor, according to a judgment result of the hold state judging section. 1. An offset estimation apparatus comprising:an acquiring section that acquires an output signal of an angular velocity sensor mounted in a mobile device;an offset estimating section that estimates an offset of the angular velocity sensor based on a first AC component included in the output signal of the angular velocity sensor in a period during which a level of the first AC component cycles;a hold state judging section that judges a hold state of the mobile device; anda control section that controls whether the offset estimating section estimates the offset of the angular velocity sensor, according to a judgment result of the hold state judging section.2. The offset estimation apparatus according to claim 1 , whereinthe offset estimating section estimates the offset of the angular velocity sensor according to the level of the first AC component in the period during which the level of the first AC component cycles.3. The offset estimation apparatus according to claim 2 , whereinthe offset estimating section estimates the offset by calculating an average level of the first AC component in the period during which the level of the first AC component cycles.4. The offset estimation apparatus according to claim ...

Подробнее
Номер записи: 36
10-03-2022 дата публикации

CORRECTION METHOD FOR GYRO SENSOR

Номер: US20220074745A1
Автор: ARATANI Kota, URAKAWA Kazuo, Yamamoto Michiharu
Принадлежит:

A correction method for a gyro sensor which measures angular velocity of a vehicle about an axis in a vertical direction includes a generation process of performing a process on a difference between a measured azimuth obtained by performing a process on an sensor output, which is an output from the gyro sensor, and a vehicle azimuth estimated by using markers arranged along a traveling road of the vehicle to obtain correction information and a correction process of correcting the measured azimuth obtained by performing the process on the sensor output, which is the output from the gyro sensor, by using the correction information. 1. A correction method for a gyro sensor which measures angular velocity of a vehicle about an axis in a vertical direction , comprising:a generation process of performing a process on a difference between a measured azimuth obtained by performing a process on an sensor output, which is an output from the gyro sensor, and a vehicle azimuth estimated by using markers arranged along a traveling road of the vehicle to obtain correction information; anda correction process of correcting the sensor output or the measured azimuth by using the correction information.2. The correction method for the gyro sensor in claim 1 , wherein the correction information is information indicating a temporal change of the difference claim 1 , andthe correction process is a process of correcting the sensor output or the measured azimuth with a correction amount based on the correction information.3. The correction method for the gyro sensor in claim 2 , wherein the correction information includes at least a gradient a of a straight line approximating the temporal change of the difference claim 2 , andthe correction process is a process of shifting the output from the gyro sensor by the correction amount corresponding to the gradient a.4. The correction method for the gyro sensor in claim 2 , wherein the correction information includes at least a gradient a and an ...

Подробнее
Номер записи: 37
10-03-2022 дата публикации

SENSOR SYSTEM, METHOD FOR OPERATING A SENSOR SYSTEM

Номер: US20220074746A1
Автор: Diazzi Francesco, Khalilyulin Ruslan, Visconti Andrea
Принадлежит:

A sensor system having a MEMS gyroscope. The sensor system includes a seismic mass for acquiring a measuring signal, a drive circuit, an acquisition circuit for reading out and demodulating the measuring signal, whereby a rate of rotation signal and a quadrature signal phase-shifted relative to the rate of rotation signal is generated, and a digital processing circuit for compensating an offset of the digitized rate of rotation signal using the digitized quadrature signal. The acquisition circuit and the digital processing circuit encompass a rate of rotation circuit, and a quadrature circuit for generating and processing the quadrature signal and generating a compensation signal for the offset compensation of the digitized rate of rotation signal. At least part of the quadrature circuit is operable in at least one other operating mode than the rate of rotation circuit, independently of the operating mode of the rate of rotation circuit. 1. A sensor system having a MEMS gyroscope , the sensor system comprising:a seismic mass that is able to be excited to oscillations for acquiring a measuring signal;a drive circuit configured to excite and maintain a defined oscillating motion of the seismic mass;an acquisition circuit configured to read out the measuring signal and to demodulate the measuring signal, whereby a rate of rotation signal and a quadrature signal phase-shifted relative to the rate of rotation signal are generated; anda digital processing circuit configured to compensate an offset of a digitized rate of rotation signal using a digitized quadrature signal;wherein the acquisition circuit and the digital processing circuit encompassing rate of rotation circuit configured to generate and process the rate of rotation signal, and a quadrature circuit configured to generate and process the quadrature signal and to generate a compensation signal for the offset compensation of the digitized rate of rotation signal; andwherein at least part of the quadrature ...

Подробнее
Номер записи: 38
10-03-2022 дата публикации

PERSISTENT CALIBRATION OF EXTENDED REALITY SYSTEMS

Номер: US20220075447A1
Автор: Ballan Luca, Guo Chao X., Han Fei, Lu Junyang, Rahman Sazzadur
Принадлежит:

Systems and techniques for persistent calibration of an electronic device configured to implement an extended reality (XR) system involve estimating and validating visual-inertial odometry (VIO) calibration parameters during an active XR session of the electronic device. Validating the estimated VIO calibration parameters involves performing a strict calibration qualification of the estimated VIO calibration parameters using a thresholding module, machine learning module, or both. An initial calibration qualification is performed concurrently with the strict calibration qualification based on VIO performance. If the estimated VIO calibration parameters pass the strict calibration qualification and initial calibration qualification, they are stored for use to calibrate the device in future XR sessions. Persistent calibration of time alignment between the inertial management unit and the image sensor of the electronic device is also performed during active XR sessions upon detection of time alignment issues. 1. A method for visual-inertial odometry (VIO) calibration of a device configured to implement an extended reality (XR) system , the method comprising:estimating VIO calibration parameters during an active XR session implemented by the device;during an initial time period, validating the estimated VIO calibration parameters based on VIO performance;validating the estimated VIO calibration parameters via a strict calibration qualification; andstoring, responsive to determining that the estimated VIO calibration parameters are valid, the estimated VIO calibration parameters at a storage device.2. The method of claim 1 , wherein a calibration qualification module is used to validate the estimated VIO calibration parameters via the strict calibration qualification claim 1 , and wherein validating the estimated VIO calibration parameters via the strict calibration qualification comprises:receiving, with the calibration qualification module, input parameters for ...

Подробнее
Номер записи: 39
21-02-2019 дата публикации

SYSTEMS AND METHODS FOR ESTIMATING ERRORS IN GYROSCOPE SENSORS

Номер: US20190056426A1
Автор: Chandel Vivek, Ghose Avik, Misra Archan, MURALIDHARAN Kartik
Принадлежит: TATA CONSULTANCY SERVICES LIMITED

Embodiments of the present disclosure provide systems and methods that establish non-linear components of gyroscope errors which have not been studied or explored earlier. These errors include but are not limited to non-linear dynamic error which is a function of the angular velocity itself. Bias instability has been observed within the same environment of temperature and atmospheric pressure. In other words, the embodiments of the present disclosure analyse and models static bias errors and dynamic non-linear errors in the gyroscope sensor which may be used to model and correct errors accordingly In subsequent measurements. The system provide solution(s) when there is no way of directly estimating temperature for bias correction of gyroscope, by estimating a temperature change by considering indirect measurements from other sensors present onboard the device. 1. A processor implemented method for estimating errors in a gyroscope sensor , the method comprising:{'b': '202', 'obtaining (), a first gyroscopic data and one or more temperature readings, wherein the first gyroscopic data is obtained from a gyroscopic sensor based on a first state of a device associated with the gyroscopic sensor, and wherein the one or more temperature readings are obtained from an onboard sensor;'}{'b': '204', 'dividing (), the first gyroscopic data into a first set of windows, wherein each window from the first set comprises a specific time period that includes at least a unique subset of the gyroscopic data;'}{'b': '206', 'calculating (), a bias for each window from the first set of windows based on a corresponding unique subset of the first gyroscopic data, and a corresponding temperature reading; and'}{'b': '208', 'generating () a temperature dependent model for the gyroscopic sensor based on the calculated bias for each window from the first set of windows and the corresponding temperature reading.'}2. The processor implemented method of claim 1 , further comprisingobtaining a ...

Подробнее
Номер записи: 40
01-03-2018 дата публикации

Vibration gyro having bias correcting function, and method of using vibration gyro

Номер: US20180058854A1
Автор: Karebu Suzuki, Kenji Kobayashi, Syuki NAKASHITA, Tomohiro Fukuda
Принадлежит: Mitsubishi Precision Co Ltd

A vibration gyro having high bias stability, and a method of using the gyro for obtaining a precise angular velocity signal by correcting the bias. The gyro has: a drive signal generating part configured to generate a multiplexed drive signal; first and second demodulation circuits configured to generate first and second demodulation signals, respectively; first and second control circuits configured to generate first and second feedback amplitude signals, respectively; a feedback signal generating part configured to generate a first multiplexed feedback signal by multiplexing a first feedback signal obtained by modulating the first feedback amplitude signal at the first frequency, and at least one second feedback signal obtained by modulating the second feedback amplitude signal at the at least one second frequency; and a subtracter configured to output an angular velocity signal by subtracting the second feedback amplitude signal from the first feedback amplitude signal.

Подробнее
Номер записи: 41
02-03-2017 дата публикации

METHOD FOR CALCULATING THE ANGLE OF INCLINATION OF MAGNETIC FIELD IN A SENSOR COORDINATION SYSTEM

Номер: US20170059324A1
Автор: CHOI Yeon Soo, KI Kyoung Suck, KIM Byung Ki, KIM Dong Yoon, Kim Young Joon, NA Jo An, PARK Seung Hwan, SHIN Hyung Sik
Принадлежит: MAGNACHIP SEMICONDUCTOR, LTD.

A method for calculating an angle of inclination of a magnetic field in a sensor coordination system includes measuring a magnetic field vector using a magnetometer, measuring an acceleration vector using an accelerometer, determining whether the sensor coordination system is in a moving state or a stationary state using the acceleration vector, and calculating the inclination angle of the magnetic field using the magnetic field vector and the acceleration vector, in response to the determining indicating the stationary state. 1. A method for calculating an angle of inclination of a magnetic field in a sensor coordination system , comprising:measuring a magnetic field vector using a magnetometer;measuring an acceleration vector using an accelerometer;determining whether the sensor coordination system is in a moving state or a stationary state using the acceleration vector; andcalculating the inclination angle of the magnetic field using the magnetic field vector and the acceleration vector, in response to the sensor coordinate system being determined to be in the stationary state.2. The method for calculating the angle of inclination of the magnetic field of claim 1 , wherein the acceleration vector comprises a gravitational acceleration component and a linear acceleration component.3. The method for calculating the angle of inclination of the magnetic field in a sensor coordination system of claim 1 , wherein the sensor coordination system is determined to be in the stationary state in response to a following Equation being satisfied:{'br': None, 'i': a', '|≦Ts, 'sub': g', 'value, '|∥Acc∥−,'}{'sub': g', 'value, 'wherein a, Acc and Tsdenote a gravitational acceleration value, a sensed acceleration vector, and a threshold value, respectively.'}6. The method for calculating the angle of inclination of the magnetic field in a sensor coordination system of claim 1 , wherein the inclination angle of the magnetic field is calculated by a following Equation:{'br': None, ' ...

Подробнее
Номер записи: 42
02-03-2017 дата публикации

PLL CIRCUIT, SEMICONDUCTOR DEVICE, ELECTRONIC CONTROL UNIT, AND CONTROL METHOD OF PLL CIRCUIT

Номер: US20170059325A1
Автор: SHIONO Masumi
Принадлежит:

According to one embodiment, a PLL circuit includes: a digital phase comparator that captures an instantaneous value of a reference clock signal, which is a digital since wave, in synchronization with a feedback clock signal, and detects a phase difference between the reference clock signal and the feedback clock signal based on the captured instantaneous value; a control voltage generation unit that generates a control voltage according to the phase difference; a voltage control oscillator that generates an output clock signal having a frequency according to the control voltage; a frequency divider that divides a frequency of the output clock signal to generate the feedback clock signal; and a control unit that amplifies the reference clock signal to be supplied to the digital phase comparator with an amplification factor according to the phase difference. 1. A PLL circuit comprising:a phase difference detection unit that captures an instantaneous value of a reference clock signal in synchronization with a feedback clock signal, and detects a phase difference between the reference clock signal and the feedback clock signal based on the captured instantaneous value, the reference clock signal being a digital sine wave;a control voltage generation unit that generates a control voltage according to the phase difference;a voltage control oscillator that generates an output clock signal having a frequency according to the control voltage;a frequency divider that divides a frequency of the output clock signal to generate the feedback clock signal; anda control unit that amplifies the reference clock signal to be supplied to the phase difference detection unit with an amplification factor according to the phase difference.2. The PLL circuit according to claim 1 , wherein when the phase difference is larger than a first predetermined value claim 1 , the control unit amplifies the reference clock signal with an amplification factor larger than that when the phase difference ...

Подробнее
Номер записи: 43
20-02-2020 дата публикации

APPLYING A POSITIVE FEEDBACK VOLTAGE TO AN ELECTROMECHANICAL SENSOR UTILIZING A VOLTAGE-TO-VOLTAGE CONVERTER TO FACILITATE A REDUCTION OF CHARGE FLOW IN SUCH SENSOR REPRESENTING SPRING SOFTENING

Номер: US20200056887A1
Автор: SEEGER Joseph
Принадлежит:

Reducing, at a common sense electrode of a group of sensors of a system, a common charge flow due to a common motion of the group of sensors is presented herein. The group of electromechanical sensors generates a common charge flow as a result of a common motion of the group of electromechanical sensors and a differential charge flow as a result of a differential motion of the group of electromechanical sensors—respective sense elements of the group of electromechanical sensors being electrically connected at the common sense electrode. The system further comprises a voltage-to-voltage converter component that generates, via an output of the voltage-to-voltage converter component, a positive feedback voltage, and minimizes the common charge flow by coupling, via a defined feedback capacitance, the positive feedback voltage to the common sense electrode—the common sense electrode being electrically coupled to an input of the voltage-to-voltage converter component. 1. A system , comprising:a group of electromechanical sensors that generate a common charge flow as a result of a common motion of the group of electromechanical sensors and a differential charge flow as a result of a differential motion of the group of electromechanical sensors, wherein respective sense elements of the group of electromechanical sensors have been electrically connected at a common sense electrode; and generates, via an output of the voltage-to-voltage converter component, a positive feedback voltage, and', 'minimizes the common charge flow by coupling, via a defined feedback capacitance, the positive feedback voltage to the common sense electrode, wherein the common sense electrode is electrically coupled to an input of the voltage-to-voltage converter component., 'a voltage-to-voltage converter component that'}2. The system of claim 1 , wherein the voltage-to-voltage converter component minimizes the common charge flow by maintaining claim 1 , via the defined feedback capacitance claim 1 ...

Подробнее
Номер записи: 44
28-02-2019 дата публикации

HALF-BRIDGE CIRCUIT FOR A SENSOR

Номер: US20190063957A1
Автор: Chen Du, MORENO GALBIS Pablo, Wang Stanley Bo-Ting
Принадлежит: InvenSense, Inc.

A circuit includes a sensor and a half-bridge circuit. The sensor includes a first sensor capacitor and a second sensor capacitor, where capacitances of the first sensor capacitor and the second sensor capacitor change in opposing directions responsive to receiving a physical signal. The sensor generates a plurality of sensor signals according to the physical signal, the plurality of signals including a common mode injection and a plurality of differential signals. The half-bridge circuit includes a first half-bridge capacitor and a second half-bridge capacitor, where capacitances of the first half-bridge capacitor and the second half-bridge capacitor compensate for the common mode injection of the plurality of sensor signals. The sensor and the half-bridge circuit are coupled to a plurality of sense nodes configured to output the plurality of differential signals. 1. A circuit comprising:a sensor comprising a first sensor capacitor and a second sensor capacitor, wherein capacitances of the first sensor capacitor and the second sensor capacitor change in opposing directions responsive to receiving a physical signal, the sensor generating a plurality of sensor signals according to the physical signal and a plurality of drive signals, the plurality of sensor signals comprising a common mode injection and a plurality of differential signals;a half-bridge circuit coupled to the sensor, the half-bridge circuit comprising a first half-bridge capacitor and a second half-bridge capacitor, wherein capacitances of the first half-bridge capacitor and the second half-bridge capacitor compensate for the common mode injection of the plurality of sensor signals; anda plurality of sense nodes coupled to the sensor and the half-bridge circuit, the sense nodes configured to output the plurality of differential signals.2. The circuit of claim 1 , wherein a sum of the capacitances of the first half-bridge capacitor and the second half-bridge capacitor are substantially equal to a sum ...

Подробнее
Номер записи: 45
27-02-2020 дата публикации

METHOD AND SYSTEM FOR CORRECTING DRIVING AMPLITUDE OF GYRO SENSOR

Номер: US20200064152A1
Автор: WU Huagang
Принадлежит:

A method for correcting the driving amplitude of a gyro sensor, mainly comprises adjusting the size of a driving signal (a preset amplitude value) through feedback of a sensor response amplitude signal (an average amplitude value) in a resonance maintaining time period, so that the response amplitude of the resonance maintaining time period tends to he equal, and a stable resonance amplitude is maintained. Also provided is a system for correcting the driving amplitude of a gyro sensor. 1. A method of calibrating a driving amplitude of a gyroscope sensor , comprising:a monitoring step: obtaining an average amplitude value of a first preset number of waveforms of a resonance maintaining phase; anda calibrating step: if the average amplitude value is lower than a lowest target amplitude value, then increasing a preset amplitude value in a compulsory resonance phase; if the average amplitude value is higher than the highest target amplitude value, then reducing the preset amplitude value in the compulsory resonance phase;adjusting a preset amplitude value in a resonance ceasing phase according to the adjusted preset amplitude value in the compulsory resonance phase, and applying an unadjusted preset amplitude value in the resonance maintaining phase, the adjusted preset amplitude value in the compulsory resonance phase, and the adjusted preset amplitude value in the resonance ceasing phase to a next oscillation period.2. The method according to claim 1 , wherein the monitoring step comprises: obtaining an average amplitude value of the first preset number of waveforms of a former segment of the resonance maintaining phase; andthe calibrating step comprises: if the average amplitude value of the first preset number of waveforms of the former segment of the resonance maintaining phase is lower than the lowest target amplitude value, then increasing the preset amplitude value of the compulsory resonance phase; if the average amplitude value of the first preset number of ...

Подробнее
Номер записи: 46
14-03-2019 дата публикации

Method And Device For Determining Rotational Rate

Номер: US20190078885A1
Автор: Tat Derek, Tracy Michael, Turon Martin
Принадлежит:

An angular rate sensor has a ring, a plurality of sensor-drivers, circuitry, a controller, an energy sensor, and an output signal generator. The sensors-drivers may be capacitors, inductors, or a sensor having a piezoelectric material. The sensor-drivers each have a component that vibrates along with the ring, and the sensor-drivers are arranged in cooperating sets, each cooperating set having two sensor-drivers positioned 180° apart. The circuitry can selectively engage some of the cooperating sets as sensors and others of the cooperating sets as drivers. Those sets used as sensors sense motion of the ring. Those sets used as drivers apply forces to the ring. Some of the drivers cause the ring to vibrate at its natural frequency, and some of the drivers seek to inhibit motion of the ring at particular locations. Locations at which drivers seek to inhibit motion are those locations that would be nodes in the absence of angular motion. 1. An angular rate sensor , comprising:a ring;a plurality of sensor-drivers, each sensor-driver having a component that moves with the ring, wherein the sensor-drivers are arranged in cooperating sets, and each cooperating set has two sensor-drivers positioned 180° apart;circuitry which can selectively engage some of the cooperating sets as sensors and others of the cooperating sets as drivers; [ (i) engages a first of the cooperating sets to radially apply forces to the ring in order to cause the ring to vibrate at a natural frequency that would establish at least four node locations in the absence of angular motion, each node location being a location at which the vibrating ring does not move radially in the absence of angular motion;', '(ii) engages a second of the cooperating sets to sense radial movement of the ring caused by the first cooperating set radially driving the ring;', '(iii) engages a third of the cooperating sets to sense radial movement of the ring at a first two of the node locations;', '(iv) engages a fourth of the ...

Подробнее
Номер записи: 47
14-03-2019 дата публикации

APPARATUSES AND METHODS FOR PROCESSING A SENSOR SIGNAL

Номер: US20190078888A1
Автор: Diazzi Francesco, Khalilyulin Ruslan, Visconti Andrea
Принадлежит:

Apparatuses and methods are described for processing the sensor signal of a sensor component, a noise signal that is generated as a function of specific properties of an interference signal component of the sensor signal and/or of specific properties of a temperature signal of a temperature sensor being mixed into a useful signal component of the sensor signal. 1. An apparatus for processing a sensor signal of a sensor component , the sensor signal encompassing at least one useful signal component , the apparatus comprising:a selection circuit for the useful signal component;a temperature sensor; anda processing circuit having means for generating a noise signal that is mixed into the at least one useful signal component; a noise generator having variable operating parameters; and', 'means for analyzing the properties of a temperature signal of the temperature sensor; and', 'configuration means for choosing and setting the operating parameters of the noise generator as a function of the properties of the temperature signal., 'wherein the processing circuit includes2. An apparatus for processing a sensor signal of a sensor component , the sensor signal encompassing at least one useful signal component and at least one interference signal component , the apparatus comprising:a selection circuit having means for separating the at least one useful signal component from the at least one interference signal component; anda processing circuit having means for generating a noise signal that is mixed into the at least one useful signal component; a noise generator having variable operating parameters; and', 'means for analyzing the properties of the interference signal component; and', 'configuration means for choosing and setting the operating parameters of the noise generator as a function of the properties of the interference signal component., 'wherein the processing circuit includes3. The apparatus as recited in claim 1 , wherein the configuration means of the ...

Подробнее
Номер записи: 48
14-03-2019 дата публикации

DRIVING CIRCUIT, METHOD FOR DRIVING A MEMS GYROSCOPE AND A CORRESPONDING MEMS GYROSCOPE

Номер: US20190078889A1
Автор: Facchinetti Stefano
Принадлежит:

A driving circuit for a microelectromechanical system (MEMS) gyroscope operating based on the Coriolis effect is provided. The driving circuit supplies drive signals to a mobile mass of the MEMS gyroscope to cause a driving movement of the mobile mass to oscillate at an oscillation frequency. The driving circuit includes an input stage, which receives at least one electrical quantity representing the driving movement and generates a drive signal based on the electrical quantity; a measurement stage, which measures an oscillation amplitude of the driving movement based on the drive signal; and a control stage, which generates the drive signals based on a feedback control of the oscillation amplitude. The measurement stage performs a measurement of a time interval during which the drive signal has a given relationship with an amplitude threshold, and measures the oscillation amplitude as a function of the time interval. 1. A driving circuit for a microelectromechanical system (MEMS) gyroscope , comprising:an input stage configured to receive at least one electrical quantity indicative of a driving movement of a mobile mass of the MEMS gyroscope, and generate at least one drive signal based on the electrical quantity;a measurement stage configured to determine a duration of a time interval in which the drive signal satisfies a given relationship with an amplitude threshold, and determine an oscillation amplitude of the driving movement based on the duration of the time interval; anda control stage configured to receive the oscillation amplitude, generate drive signals for a mobile mass of the MEMS gyroscope based on the oscillation amplitude, and supply the drive signals to the mobile mass of the MEMS gyroscope to cause the driving movement to be at an oscillation frequency.2. The circuit according to claim 1 , wherein the measurement stage is configured to:generate a clock signal based on the oscillation frequency; anddetermine a count of a number of periods of the ...

Подробнее
Номер записи: 49
22-03-2018 дата публикации

DUTY-CYCLED PHASE SHIFTER FOR ANGULAR RATE SENSOR

Номер: US20180080769A1
Автор: Arndt Gregory B., Painter Christopher C.
Принадлежит: Apple Inc.

An architecture is disclosed for an angular rate sensor that includes a duty-cycled phase shifter for generating a clock with high resolution delay for use in synchronized demodulation of a sensor output signal. In an embodiment, a sensor comprises: a mechanical resonator; a drive circuit coupled to the mechanical resonator and operable to actuate the mechanical resonator into resonant vibration; a sense circuit mechanically coupled to the mechanical resonator, the sense circuit operable to generate a sense signal having an in-phase signal component and a quadrature signal component; a demodulator circuit operable to receive the sense signal and a first clock for demodulating the sense signal to separate the in-phase signal component from the quadrature signal component; and a duty-cycled phase shifter coupled to the demodulator, the duty-cycled phase shifter operable to generate the first clock. 1. A sensor comprising:a mechanical resonator;a drive circuit coupled to the mechanical resonator and operable to actuate the mechanical resonator into resonant vibration;a sense circuit mechanically coupled to the mechanical resonator, the sense circuit operable to generate a sense signal having an in-phase signal component and a quadrature signal component;a demodulator circuit operable to receive the sense signal and a first clock for demodulating the sense signal to separate the in-phase signal component from the quadrature signal component; anda duty-cycled phase shifter coupled to the demodulator, the duty-cycled phase shifter operable to generate the first clock.2. The sensor of claim 1 , wherein the duty-cycled phase shifter is coupled to a phase-locked loop (PLL) and is operable to generate the first clock by duty-cycling a second clock generated by the PLL.3. The sensor of claim 2 , wherein the drive circuit comprises:a transducer for converting displacement of the mechanical resonator into a change of capacitance;an amplification and signal conditioning circuit ...

Подробнее
Номер записи: 50
23-03-2017 дата публикации

INTEGRATED MEMS INERTIAL SENSING DEVICE

Номер: US20170082438A1
Автор: Bhandari Sanjay, Rastegar Ali J.
Принадлежит:

An integrated MEMS inertial sensing device can include a MEMS inertial sensor with a drive loop configuration overlying a CMOS IC substrate. The CMOS IC substrate can include an AGC loop circuit coupled to the MEMS inertial sensor. The AGC loop acts in a way such that generated desired signal amplitude out of the drive signal maintains MEMS resonator velocity at a desired frequency and amplitude. A benefit of the AGC loop is that the charge pump of the HV driver inherently includes a ‘time constant’ for charging up of its output voltage. This incorporates the Low pass functionality in to the AGC loop without requiring additional circuitry. 120-. (canceled)21. A MEMS inertial sensing device , the device comprising:a MEMS inertial sensor; andan AGC loop circuit electrically coupled to the MEMS inertial, the AGC loop circuit including:a rectifier,a proportional-integral-derivative (PID) controller, an input of the PID controller being electrically connected to an output of the rectifier,a comparator having an input electrically connected to an output of the PID controller,a charge pump having an input electrically connected to an output of the comparator, anda high-voltage (HV) driver having an input electrically connected to an output of the charge pump.221. The MEMS inertial sensing device of claim wherein the PID controller includes an integrator and a differentiator , wherein the integrator uses a programmable time constant to determine a variable operational speed of the AGC loop circuit , and wherein the differentiator is configured to change a current for charging and discharging a capacitor in the charge pump in the start-up duration so the time constant is reduced and the capacitor voltage changes faster to reduce a start-up time of the AGC loop circuit.231. The MEMS inertial sensing device of claim wherein the PID controller is configured to output a differential PWM signal having a PWM signal and an inverted PWM signal , and wherein the output of the charge ...

Подробнее
Номер записи: 51
23-03-2017 дата публикации

SYSTEMS AND METHODS FOR THERMALLY CONTROLLING SENSORS

Номер: US20170082648A1
Автор: Heshmati Ardalan, Katginari Karthik, SHEN Jianwei
Принадлежит:

A sensor may be compensated by selectively activating a temperature element to drive temperature within the thermal envelope encompassing the sensor towards an operating temperature and applying a compensation to output of the sensor based at least in part on the operating temperature. The initial ambient temperature may be estimated and the operating temperature may be selected from a set of predetermined temperatures based on the estimate. The current ambient temperature may be estimated and a new operating temperature selected when the current ambient temperature is within a threshold of the operating temperature. Correspondingly, the temperature element may be selectively activated to drive temperature within the thermal envelope towards the new operating temperature and an appropriate compensation may be applied to the sensor output. 2. The method of claim 1 , further comprising determining a difference between the selected operating temperature and the estimated current ambient temperature and applying a second compensation to output of the sensor based at least in part on the determined difference between selected operating temperature and estimated current ambient temperature.3. The method of claim 1 , further comprising selectively activating the temperature element to compensate for hysteresis.4. The method of claim 1 , wherein selectively activating the temperature element comprises operating the temperature element at a duty cycle.5. The method of claim 4 , wherein quantifying energy supplied to the temperature element comprises characterizing the duty cycle.6. The method of claim 1 , wherein quantifying energy supplied to the temperature element comprising quantifying energy delivered to maintain the thermal envelope at the operating temperature.7. The method of claim 1 , further comprising estimating an initial ambient temperature based at least in part on output from the temperature sensor prior to selectively activating the temperature element.8. The ...

Подробнее
Номер записи: 52
12-03-2020 дата публикации

Reconfigurable sensor unit for electronic device

Номер: US20200080843A1
Автор: Mahesh Chowdhary
Принадлежит: STMicroelectronics lnc USA

A sensor chip includes registers storing and outputting configuration data, an extraction circuit receiving digital data and extracting features of the digital data in accordance with the configuration data, and a classification circuit applying a decision tree to the extracted features to generate a context of an electronic device into which the sensor chip is incorporated relative to its surroundings, the decision tree operating according to the configuration data. The classification unit outputs the context to the registers for storage. The configuration data includes which features for the extraction circuit to extract from the digital data, and a structure for the decision tree. The structure for the decision tree includes conditions that the decision tree is to apply to the at least one extracted feature, and outcomes to be effectuated based upon whether the extracted features meet or do not meet the conditions.

Подробнее
Номер записи: 53
12-03-2020 дата публикации

SPINTRONIC GYROSCOPIC SENSOR DEVICE

Номер: US20200080844A1
Автор: Katti Romney R.
Принадлежит: HONEYWELL INTERNATIONAL INC.

A magnetic tunnel junction (MTJ) based sensor device includes a MTJ element and processing circuitry. The MTJ element includes a free layer, a pinned layer, and a tunnel barrier, the tunnel barrier being arranged above the pinned layer, wherein the free layer is adapted to flex away from the tunnel barrier during gyroscopic motion. The processing circuitry is configured to measure a resistance at the MTJ element and determine gyroscopic motion based on the resistance at the MTJ element. 1. A magnetic tunnel junction (MTJ) based sensor device , the device comprising:a MTJ element comprising a free layer, a pinned layer, and a tunnel barrier, the tunnel barrier being arranged above the pinned layer, wherein the free layer is adapted to flex away from the tunnel barrier during gyroscopic motion; and measure a resistance at the MTJ element; and', 'determine gyroscopic motion based on the resistance at the MTJ element., 'processing circuitry configured to2. The device of claim 1 , wherein the MTJ element comprises a support structure adapted to arrange the free layer above the tunnel barrier.3. The device of claim 2 , wherein the free layer comprises a magnetized portion arranged above the tunnel barrier.4. The device of claim 2 , wherein the free layer comprises a magnetized portion arranged above the pinned layer and coplanar with the tunnel barrier.5. The device of claim 2 , wherein the support structure comprises a via adapted to electrically couple the free layer to processing circuitry.6. The device of claim 1 , wherein the MTJ element comprises:a base layer, wherein the pinned layer is arranged above the base layer, and wherein the free layer extends along a vertical direction away from the base layer.7. The device of claim 6 , wherein the free layer comprises a magnetized portion arranged above the pinned layer and coplanar with the tunnel barrier.8. The device of claim 6 , wherein the base layer comprises a via adapted to electrically couple the free layer to ...

Подробнее
Номер записи: 54
30-03-2017 дата публикации

IMU BASED HITCH ANGLE SENSING DEVICE

Номер: US20170089697A1
Автор: Shepard Daniel Robert
Принадлежит:

The present invention is a hitch angle sensor that utilizes an inertial measurement unit (IMU) in the vehicle and an IMU in the trailer. The present invention measures the rotation of the vehicle and the trailer to determine the change in the angle between the vehicle and the trailer. 1. A trailer hitch angle sensing system comprising a rotation sensor in a vehicle and a rotation sensor in a trailer whereby the rotation of the vehicle and the trailer are measured and the hitch angle is determined from the two rotation measurements.2. The trailer hitch angle sensing system of whereby the rotation sensor in the trailer comprises one or more electric components.3. The trailer hitch angle sensor of whereby the one or more electric components receive power from a battery.4. The trailer hitch angle sensor of whereby the one or more electric components receive power from the vehicle.5. The trailer hitch angle sensing system of whereby receiving power comprises a connection through a standard trailer wiring harness that provides power to the trailer.6. The trailer hitch angle sensor of further comprising a communication device.7. The trailer hitch angle sensor of whereby output from the communication device is provided to the vehicle by means of a wired connection.8. The trailer hitch angle sensor of whereby the wired connection comprises a carrier signal traveling over one of the wires of the wiring harness.9. The trailer hitch angle sensor of whereby output from the communication device is provided to the vehicle by means of a wireless connection.10. The trailer hitch angle sensor of whereby the wireless connection is a Bluetooth connection.11. The trailer hitch angle sensing system of further comprising a computing device that can receive information from the rotation sensor and provide information to the communication device.12. A method for detecting an angle between a vehicle and a trailer that are coupled together comprising the steps of: (i) providing a first sensor ...

Подробнее
Номер записи: 55
30-03-2017 дата публикации

MAGNETIC INERTIAL SENSOR ENERGY HARVESTING AND SCAVENGING METHODS, CIRCUITS AND SYSTEMS

Номер: US20170093265A1
Автор: PAGANI Alberto
Принадлежит:

A magnetic energy harvesting and scavenging circuit includes a first substrate having a first surface and a second surface. An energy harvesting and scavenging coil is formed proximate the first surface. An electromechanical systems device, which may be a MEMS device, includes a moveable mass that extends over the first surface of the first substrate and may be displaced relative to the substrate in three dimensions responsive to an external force applied to the moveable mass. The movable mass includes at least one permanent magnet that is magnetically coupled to the energy harvesting and scavenging coil. Energy harvesting and scavenging circuitry, which may be formed in the first substrate where the first substrate is a semiconductor chip, is electrically coupled to the energy harvesting and scavenging coil and generates electrical energy due to magnetic flux variation through the energy harvesting and scavenging coil responsive to movement of the moveable mass. 1. A magnetic energy harvesting and scavenging circuit , comprising:a first substrate having a first surface and a second surface;at least one energy harvesting and scavenging coil formed proximate the first surface;an electromechanical systems device including a moveable mass extending over the first surface of the first substrate and configured to be displaced relative to the first substrate in three dimensions responsive to an external force applied to the moveable mass, and the movable mass including at least one permanent magnet that is magnetically coupled to the at least one energy harvesting and scavenging coil; andenergy harvesting and scavenging circuitry electrically coupled to the at least one energy harvesting and scavenging coil, the energy harvesting and scavenging circuitry configured to generate electrical energy due to magnetic flux variation through the at least one energy harvesting and scavenging coil responsive to movement of the moveable mass.2. The magnetic energy harvesting and ...

Подробнее
Номер записи: 56
01-04-2021 дата публикации

Experimental calibration method for redundant inertial measurement unit

Номер: US20210095993A1
Автор: CHENG Jianhua, DONG Mingtao, Dong Ping, FU Wenhuan, Liu Ping, LUO Guangdi, Sun Xiangyu, Yang Li
Принадлежит:

The disclosure provides an experimental calibration method of a redundant inertial measurement unit including, step (1), establishing an installation angle model using a cone descriptive scheme, and obtaining a relationship of an angular speed of a carrier and an angular speed measured by each gyroscope, step (2), establishing a standard calibration model of the redundant inertial measurement unit based on a relationship between a sensor coordinate system and a carrier coordinate system, step (3), establishing a state equation and a measurement equation of a filter, step (4), performing a row amplification of measurement amounts based on the measurement equation established in step (3), and obtaining an amplificated measurement equation for improving observability, and step (5), obtaining a Jacobi matrix and a Hessian matrix based on the amplificated measurement equation, and estimating error parameters by an extended Kalman filtering algorithm based on a second-order Taylor expansion. 1. An experimental calibration method of a redundant inertial measurement unit comprising ,step (1), establishing an installation angle model using a cone descriptive scheme, and obtaining a relationship of an angular speed of a carrier and an angular speed measured by each gyroscope,step (2), establishing a standard calibration model of the redundant inertial measurement unit based on a relationship between a sensor coordinate system and a carrier coordinate system,step (3), establishing a state equation and a measurement equation of a filter,step (4), performing a row amplification of measurement amounts based on the measurement equation established in step (3), and obtaining an amplificated measurement equation for improving observability, andstep (5), obtaining a Jacobi matrix and a Hessian matrix based on the amplificated measurement equation, and estimating error parameters by an extended Kalman filtering algorithm based on a second-order Taylor expansion, to obtain a precise ...

Подробнее
Номер записи: 57
05-04-2018 дата публикации

METHOD FOR CONTROLLING THE PRECESSION OF A VIBRATING STRUCTURE GYROSCOPE

Номер: US20180094947A1
Автор: CHARLAIX Jean-Christophe, DEBANNE Pascal, DELEAUX Benjamin, PINTURAUD Arnaud
Принадлежит:

A method is proposed for controlling the precession of a gyroscope () comprising a support () and a resonator (), the support () being mobile in a platform coordinate system and stationary in a measurement coordinate system, the method comprising the generation () of a first control signal suitable for rotating the resonator () with respect to the support () in two opposite directions of rotation during a first period, the method being characterized by the following steps: 1. Method for controlling the precession of a vibrating structure gyroscope comprising a support and a resonator , the support being mobile in a platform coordinate system and stationary in a measurement coordinate system , the method comprising the generation of a first control signal suitable for rotating a vibration of the resonator with respect to the support in two opposite directions of rotation during a first period , wherein:reception of data on relative positioning between the measurement coordinate system and the platform coordinate system, comprising a matrix for transition from the measurement coordinate system to the platform coordinate system, calculated at a reference time,calculation of a second control signal to be generated during a second period on the basis of the first control signal and the relative-positioning data, the second control signal being chosen in such a way as to minimize an average of accumulated angular errors in the angular measurements acquired by the vibrating structure gyroscope during the entirety of the first and second period, the angular errors being expressed in the platform coordinate system, the second precession signal being calculated under the hypothesis that the relative-positioning data is fixed from the reference time throughout the entire second period and under the hypothesis that said angular errors are constant throughout the entire second period.2. Method according to claim 1 , wherein the data on relative positioning during the first ...

Подробнее
Номер записи: 58
16-04-2015 дата публикации

VIBRATORY RING STRUCTURE

Номер: US20150101409A1
Автор: Fell Christopher Paul
Принадлежит: Atlantic Inertial Systems Limited

A method of tuning a vibratory ring structure is described which comprises determining an angular spacing for a pair of fine tuning holes () of substantially the same size, located on or near the neutral axis of the vibratory ring structure (), the angular offset being selected to reduce to an acceptable level the frequency split between the target normal mode and a further normal mode which Is angularly offset relative to the target normal mode, and forming the pair of fine tuning holes () in the vibratory ring structure () at the determined angular spacing, A ring structure, for example a gyroscope, tuned or balanced in this manner is also disclosed. 1. A method of tuning a vibratory ring structure comprising determining an angular spacing for a pair of fine tuning holes of substantially the same size , located on or near the neutral axis of the vibratory ring structure , the angular offset being selected to reduce to an acceptable level the frequency split between the target normal mode and a further normal mode which is angularly offset relative to the target normal mode , and forming the pair of fine tuning holes in the vibratory ring structure at the determined angular spacing.2. A method according to claim 1 , wherein the pair of fine tuning holes are placed at a substantially equal angular offset from a radial anti-node of the target normal mode.3. A method according to claim 2 , wherein the pair of fine tuning holes are formed substantially symmetrically about a radial anti-node of the target normal mode.4. A method according to claim 1 , wherein the angular offset between the fine tuning holes is less than 45 degrees.5. A method according to claim 1 , further comprising the formation of at least one coarse tuning hole.6. A method according to claim 5 , wherein the coarse tuning hole is of substantially the same size as the fine tuning holes.7. A method according to claim 1 , wherein the tuning holes are formed by laser ablation.8. A method according to ...

Подробнее
Номер записи: 59
12-05-2022 дата публикации

SYNCHRONIZATION OF A GYROSCOPE IN A VIRTUAL-REALITY ENVIRONMENT

Номер: US20220146262A1
Автор: Anderson Jonathan Michael, Flach Matthew James, Kowalski Kevin David
Принадлежит: Hewlett-Packard Development Company, L.P.

Examples of synchronization of a gyroscope in a virtual-reality (VR) environment are described. In some examples, gyroscopic feedback for VR application content may be predicted. In some examples, a time shift corresponding to a physical system lag of a gyroscope may be added to synchronize the gyroscopic feedback with the VR application content. In some examples, the gyroscopic feedback may be applied based on the time shift. 1. A method , comprising:predicting gyroscopic feedback for virtual-reality (VR) application content;adding a time shift corresponding to a physical system lag of a gyroscope to synchronize the gyroscopic feedback with the VR application content; andapplying the gyroscopic feedback based on the time shift.2. The method of claim 1 , wherein the VR application content comprises visual stimuli.3. The method of claim 2 , wherein the time shift comprises an amount of time to actuate the gyroscope to synchronize the visual stimuli with a physical force applied by the gyroscope.4. The method of claim 1 , wherein predicting the gyroscopic feedback comprises determining the gyroscopic feedback for a predicted state of the VR application content.5. The method of claim 4 , wherein predicting the gyroscopic feedback comprises determining a physical force to be applied by the gyroscope for the predicted state of the VR application content.6. The method of claim 1 , wherein the physical system lag of a gyroscope comprises an amount of time to change a rotational speed of the gyroscope.7. A method claim 1 , comprising:determining that gyroscopic feedback from a gyroscope is to accompany a virtual-reality (VR) visual frame;preparing the gyroscope for the gyroscopic feedback during a time shift corresponding to a physical system lag of the gyroscope; andapplying the gyroscopic feedback at the end of the time shift when the VR visual frame is displayed.8. The method of claim 7 , further comprising updating a VR simulation while the gyroscope is prepared during ...

Подробнее
Номер записи: 60
14-04-2016 дата публикации

Sensor Element and Method for Capturing a First and a Second Component of a Physical Variable

Номер: US20160102980A1
Автор: Neul Reinhard
Принадлежит:

The disclosure relates to a sensor element for capturing a first and a second component of a physical variable. The sensor element comprises a first measuring transducer for measuring a first component, directed in a first measuring direction, of the physical variable. The sensor element further comprises a second measuring transducer for measuring a second component, directed in a second measuring direction, of the physical variable, wherein the first and second measuring transducers are formed or arranged on or in a carrier substrate, which contains a material on or in which measuring transducers can be produced during processing with a predefined processing method, said measuring transducers being formed to measure the physical variable in a first or second measuring direction, wherein a measuring angle between the first and the second measuring direction depends on the material of the carrier substrate. 1. A sensor element for acquiring a first component and a second component of a physical quantity , the sensor element comprising:a first measuring transducer configured to record the first component of the physical quantity pointing in a first recording direction; anda second measuring transducer configured to record the second component of the physical quantity pointing in a second recording direction,wherein the first measuring transducer and the second measuring transducer are at least one of formed on a carrier substrate and arranged in the carrier substrate, the carrier substrate comprising a material, a recording angle between the first recording direction and the second recording direction being dependent on the material of the carrier substrate.2. The sensor element as claimed in claim 1 , wherein:the sensor element is configured to determine at least one fraction of the physical quantity in at least one of a first reference direction and a second reference direction; andat least one of (i) the first measuring transducer is arranged such that the first ...

Подробнее
Номер записи: 61
06-04-2017 дата публикации

Sensor with movable part and biasing

Номер: US20170099549A1
Автор: Christoph Bernhard Wurzinger, Jose Luis Ceballos
Принадлежит: INFINEON TECHNOLOGIES AG

Methods and apparatuses are provided wherein a sensor which comprises at least two electrodes and a movable part is alternately biased with at least two different voltages.

Подробнее
Номер записи: 62
28-03-2019 дата публикации

SENSOR WITH MOVABLE PART AND BIASING

Номер: US20190098419A1
Автор: Ceballos Jose Luis, Wurzinger Christoph Bernhard
Принадлежит:

Methods and apparatuses are provided wherein a sensor which comprises at least two electrodes and a movable part is alternately biased with at least two different voltages. 125-. (canceled)26. An apparatus , comprising:a sensor including a first electrode, a second electrode, and a movable part arranged between the first electrode and the second electrode; the movable part, or', 'the first electrode and the second electrode;, 'a first switch coupling a voltage source with the movable part, or', 'the first electrode and the second electrode;, 'a second switch coupling a second voltage source witha first amplifier coupled with the first electrode via a first input of the first amplifier; anda second amplifier coupled with the second electrode via a first input of the second amplifier.27. The apparatus of claim 26 , further comprising: the set of outputs including an output of the first amplifier and an output of the second amplifier, and', 'the set of inputs including a second input of the first amplifier and a second input of the second amplifier., 'a feedback loop coupled with a set of outputs and a set of inputs,'}28. The apparatus of claim 27 , wherein the feedback loop comprises a coupling between the set of outputs and another set of inputs claim 27 ,the other set of inputs including the first input of the first amplifier and the first input of the second amplifier.29. The apparatus of claim 28 , wherein the coupling claim 28 , between the set of outputs and another set of inputs claim 28 , is formed via capacitances.30. The apparatus of claim 27 , wherein the feedback loop comprises a differential difference amplifier claim 27 ,wherein inputs of the differential difference amplifier are coupled with the set of outputs.31. The apparatus of claim 27 , wherein the feedback loop comprises switching circuitry to intermittently exchange a first feedback signal and a second feedback signal in the feedback loop.32. The apparatus of claim 26 , further comprising:a clock ...

Подробнее
Номер записи: 63
13-04-2017 дата публикации

Circular System and Method for the Digital Correction of Modulation Effects in Eletromechanical Delta-Sigma Modulators

Номер: US20170102248A1
Автор: Michael Maurer, Yiannos Manoli
Принадлежит: Albert Ludwigs Universitaet Freiburg

The present invention relates to a circuit arrangement and a method for reading a capacitive vibratory gyroscope with an at least primary mass and at least one secondary mass that is connected to the primary mass, wherein the primary mass is excited to a primary vibration during operation, and wherein the secondary mass is deflected out of a resting position in a direction that is transversal to the primary vibration when the vibratory gyroscope rotates around a sensitive axis. The circuit arrangement comprises a delta-sigma modulator with at least one control loop to perform a force feedback that resets the secondary mass into its resting state by applying a reset signal, wherein the reset signal forms a modulator output signal of the delta-sigma modulator, a correction unit that receives the modulator output signal and that is operated to generate a corrected modulator output signal that corresponds to an actually acting feedback force, a demodulator that is connected to the correction unit for demodulation of the corrected modulator output signal, and a filter arrangement to filter the demodulated signals and to output a rotary rate signal.

Подробнее
Номер записи: 64
08-04-2021 дата публикации

COMPENSATED DEMODULATOR FOR IN-PHASE AND QUADRATURE MODULATED SIGNALS, MEMS GYROSCOPE INCLUDING THE SAME AND DEMODULATION METHOD

Номер: US20210102822A1
Автор: Donadel Andrea, Facchinetti Stefano, Mecchia Alessandro, PESENTI Paolo, Quartiroli Matteo
Принадлежит:

A demodulator for demodulating the in-phase component of an input signal which is in-phase and quadrature modulated. The demodulator includes a register storing a phase calibration value and a temperature sensor that performs a plurality of temperature sensings. A compensating stage generates for each temperature sensed a corresponding first sample on the basis of the difference between the sensed temperature and a calibration temperature and a compensation function indicative of a relationship existing between the phase of the input signal and the temperature. A combination stage generates a plurality of second samples, each second sample being a function of the phase calibration value and a corresponding first sample. A generating stage generates a demodulating signal having a phase which depends on the second samples and a demodulating stage demodulates the input signal by means of the demodulating signal. 1. A demodulator , comprising:a memory configured to store a calibration value;a temperature sensor configured to generate a temperature signal;a compensation stage configured to receive the temperature signal, and generate a first signal based on the temperature signal and a compensation function, the compensation function indicating a relationship between phase and temperature;a combination stage configured to receive the first signal and the calibration value, and generate a second signal based on the first signal and the calibration value;an output stage configured to receive the second signal, and generate a demodulating signal based on the second signal, the demodulating signal having a phase that depends on the second signal; anda demodulation stage configured to receive the demodulating signal, and demodulate an input signal using the demodulating signal.2. The demodulator of wherein the second signal is a sum of the first signal and the calibration value.3. The demodulator of wherein the compensation stage generates the first signal based on the ...

Подробнее
Номер записи: 65
21-04-2016 дата публикации

CONTINUOUS MODE REVERSAL FOR REJECTING DRIFT IN GYROSCOPES

Номер: US20160109258A1
Автор: Boser Bernhard E., Eminoglu Burak, Izyumin Igor, Kline Mitchell H., YEH Yu-Ching
Принадлежит: The Regents of the University of California

A vibratory gyroscope system is described which utilizes a mechanical resonator having a first mode of vibration and an associated first natural frequency, and a second mode of vibration having an associated second natural frequency. The angular rate of motion input couples energy between the first and second modes of vibration. The gyroscope has driver circuits, sensors and actuators for the first and second modes. The invention utilizes a bias error shifting method which provides for shifting the bias error away from DC to a higher frequency, where it can be removed by low pass filtering. As a result of the inventive method, gyroscope systems can be produced with significantly lower bias error. 1. A vibratory gyroscope apparatus , comprising:a mechanical resonator having a first mode of vibration in a first axis of motion and an associated first natural frequency, and a second mode of vibration in a second axis of motion having an associated second natural frequency, wherein angular rate of motion input couples energy between said first mode of vibration and said second mode of vibration;sensors and actuators for each of the first mode and the second mode for transduction of an electrical signal into a mechanical vibration and transduction of a mechanical vibration into an electrical signal;driving circuitry connected to the actuators creating mechanical forces to maintain substantially constant, non-zero velocity amplitude vibrations in the first mode at a first frequency and the second mode at a second frequency; andoutput circuitry to infer an angular rate of motion from the mechanical forces created by said driving circuitry to said first mode or said second mode, or both said first mode and said second mode;wherein said output circuitry is configured to provide bias error cancellation based on excitation and sensing of both resonator axes and measuring sustaining forces applied to both axes of said mechanical resonator.2. The apparatus recited in claim 1 , ...

Подробнее
Номер записи: 66
20-04-2017 дата публикации

SYSTEMS AND METHODS FOR SYNCHRONIZED DISPLAY OF ATHLETIC MANEUVERS

Номер: US20170106238A1
Автор: Lokshin Anatole M., Lokshin David J.
Принадлежит:

Embodiments of the present disclosure help to synchronize multiple video segments of an actor or actors performing athletic maneuvers. Among other things, various embodiments help provide a side-by-side visual comparison of athletic maneuvers. 1. A computer-implemented method comprising:receiving, by a computer system, first sensor data related to motion by an actor over a first time period and second sensor data related to motion by an actor over a second time period;determining, by the computer system and based on the first sensor data and the second sensor data, a plurality of motion characteristics;identifying, based on the plurality of motion characteristics, an athletic maneuver associated with both the motion by the actor during the first time period and the motion by the actor during the second time period;synchronizing the first sensor data with a visual display of the athletic maneuver performed during the first time period;synchronizing the second sensor data with a visual display of the athletic maneuver performed during the first time period; andsimultaneously presenting, by the computer system, the visual display of the athletic maneuver performed during the first time period and the visual display of the athletic maneuver performed during the second time period.2. The method of claim 1 , wherein the actor performing the athletic maneuver during the first time period and the actor performing the athletic maneuver during the second time period are the same actor.3. The method of claim 1 , wherein the actor performing the athletic maneuver during the first time period is a first human actor and the actor performing the athletic maneuver during the second time period is a second human actor.4. The method of claim 1 , wherein the visual display of the athletic maneuvers performed during the first time period and the second time period include one or more of video and computer animation.5. The method of claim 4 , wherein the visual display of the athletic ...

Подробнее
Номер записи: 67
10-07-2014 дата публикации

VIBRATORY GYRO SENSOR SYSTEM

Номер: US20140190256A1
Автор: Choi Young Kil, Kim Chang Hyun, KIM Sung Tae, Na Jun Kyung, Pyo Seung Chul
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

Disclosed herein is a vibratory gyro sensor system, including: a driving unit shifting a signal output from a first sensing element of a gyro sensor by a preset shift phase, amplifying the phase shifted signal to a preset gain, and self-oscillates the amplified signal to generate and feedback a driving signal; an automatic gain control unit converting and amplifying capacitance output from a second sensing element of a gyro sensor into voltage; and a signal detection unit converting and amplifying the capacitance output from the first sensing element and the second sensing element into voltage. 1. A vibratory gyro sensor system , comprising:a driving unit shifting a signal output from a first sensing element of a gyro sensor by a preset shift phase, amplifying the phase shifted signal to a preset gain, and self-oscillates the amplified signal to generate and feedback a driving signal;an automatic gain control unit converting and amplifying capacitance output from a second sensing element of a gyro sensor into voltage, detecting peak voltage of the amplified output voltage to quantize the detected peak voltage into a digital signal, and using the quantized digital signal to generate a range of maximum voltage and minimum voltage of reference voltage so as to perform a control to adjust an amplitude range of the self oscillation of the driving unit; anda signal detection unit converting and amplifying the capacitance output from the first sensing element and the second sensing element into voltage, receiving and demodulating the amplified output voltage and a phase shifted signal of the driving unit, and converting and detecting the demodulated signal into a digital signal.2. The vibratory gyro sensor system as set forth in claim 1 , wherein the driving unit is configured of a function of shifting and outputting a phase of the signal output from the first sensing element of the gyro sensor by 90° as a differentiator.3. The vibratory gyro sensor system as set forth in ...

Подробнее
Номер записи: 68
10-07-2014 дата публикации

MICROELECTROMECHANICAL GYROSCOPE WITH COMPENSATION OF QUADRATURE SIGNAL COMPONENTS

Номер: US20140190258A1
Автор: Donadel Andrea, Garbarino Marco, Magnoni Davide
Принадлежит: STMICROELECTRONICS S.R.L.

A gyroscope includes: a mass, which is movable with respect to a supporting body; a driving loop for keeping the mass in oscillation according to a driving axis; a reading device, which supplying an output signal indicating an angular speed of the body; and a compensation device, for attenuating spurious signal components in quadrature with respect to a velocity of oscillation of the mass. The reading device includes an amplifier, which supplies a transduction signal indicating a position of the mass according to a sensing axis. The compensation device forms a control loop with the amplifier, extracts from the transduction signal an error signal representing quadrature components in the transduction signal, and supplies to the amplifier a compensation signal such as to attenuate the error signal. 1. A microelectromechanical gyroscope , comprising:a supporting body;a sensing mass elastically coupled to the supporting body and movable with respect to the supporting body according to a driving axis and a sensing axis;a microelectromechanical driving loop coupled to the sensing mass and operable to maintain the sensing mass in oscillation according to the driving axis at a frequency;a reading device coupled to the sensing mass and configured to provide an output signal representative of an angular speed of the supporting body, the reading device including a reading amplifier configured to provide a transduction signal representative of a position of the sensing mass according to the sensing axis; anda compensation device configured to reduce spurious signal components in quadrature with respect to a velocity of oscillation of the sensing mass according to the driving axis, the compensation device being configured to form a feedback control loop with the reading amplifier and configured to extract, from the transduction signal, an error signal representative of quadrature components in the transduction signal and configured to provide the reading amplifier with a ...

Подробнее
Номер записи: 69
29-04-2021 дата публикации

INERTIAL MEASUREMENT APPARATUS, ELECTRONIC INSTRUMENT, AND MOVING OBJECT

Номер: US20210123736A1
Автор: OZAWA Ryohei
Принадлежит:

An inertial measurement apparatus includes a first gyro sensor that has a detection axis set in the direction of a first axis, is driven at a first drive frequency, and detects angular velocity around the first axis, a second gyro sensor that has a detection axis set in the direction of a second axis, is driven at a second drive frequency, and detects angular velocity around the second axis, a third gyro sensor that has a detection axis set in the direction of a third axis, is driven at a third drive frequency, and detects angular velocity around the third axis, and a substrate on which the first, second, and third gyro sensors are provided. The natural vibration frequency of the substrate is set at a frequency that does not coincide with any of fd, fd, and fd, where fd, fd, and fd represent the first, second, and third drive frequencies. 1. An inertial measurement apparatus comprising:a first gyro sensor that has a detection axis set in a direction of a first axis, is driven at a first drive frequency, and detects angular velocity around the first axis;a second gyro sensor that has a detection axis set in a direction of a second axis, is driven at a second drive frequency different from the first drive frequency, and detects angular velocity around the second axis;a third gyro sensor that has a detection axis set in a direction of a third axis, is driven at a third drive frequency different from the first and second drive frequencies, and detects angular velocity around the third axis; anda substrate on which the first, second, and third gyro sensors are provided,{'b': 1', '2', '3', '1', '2', '3, 'wherein a natural vibration frequency of the substrate is set at a frequency that does not coincide with any of fd, fd, and fd, where fd represents the first drive frequency, fd represents the second drive frequency, and fd represents the third drive frequency.'}2. The inertial measurement apparatus according to claim 1 ,wherein vibration modes resulting from vibration ...

Подробнее
Номер записи: 70
11-04-2019 дата публикации

DEVICE FOR MEASURING ROTATION, ASSOCIATED METHOD AND INERTIAL NAVIGATION UNIT

Номер: US20190107395A1
Автор: Brunstein Etienne, Gramlich Marc, MORALES Sophie, PALACIOS LALOY Augustin
Принадлежит:

A device for measuring rotation including an NMR gyroscope having a sensing axis, a computer, a generating member configured to generate a magnetic field directed along the sensing axis, and a MEMS gyroscope rigidly connected to the NMR gyroscope, the MEMS gyroscope having a sensing axis aligned with the sensing axis of the NMR gyroscope, the MEMS gyroscope being suitable for delivering a MEMS signal representing a rotation about the sensing axis, the computer being configured to calculate, from an NMR signal output by the NMR gyroscope, information relating to a rotation about the sensing axis, and to analyse the MEMS signal over time in order to determine a current cut-off frequency, the computer also being configured to control the generating member in order to generate, over time, a magnetic field of which the amplitude is a function of the current cut-off frequency. 1. A method for detecting rotation of a carrier by a device embedded in said carrier , said device comprising an enclosure containing a gaseous mixture of an alkali metal and a noble gas , the method including:a step of starting up the device during which the noble gas is polarised by means of metastability exchange optical pumping; andfollowing the step of starting up, a step of acquiring, by the device, a signal representative of said rotation during which the noble gas is maintained polarised by means of spin exchange optical pumping.2. The method according to claim 1 , wherein the step of starting up is finished when the polarisation conferred on the noble gas by means of the metastability exchange optical pumping corresponds to a stationary polarisation conferred on the noble gas by means of the spin exchange optical pumping.3. The method according to claim 2 , wherein the metastability exchange optical pumping includes an excitation of the noble gas by means of a first pump laser of which the power is controlled in such a way that the polarisation conferred on the noble gas by means of the ...

Подробнее
Номер записи: 71
28-04-2016 дата публикации

DRIVE APPARATUS, PHYSICAL QUANTITY DETECTION APPARATUS, AND ELECTRONIC APPARATUS

Номер: US20160116287A1
Автор: Fujii Takeshi, FUJIURA HIDEAKI, TSUKIO Yasunobu, Uemura Takeshi, YASAKA Kenichi
Принадлежит:

A driver apparatus includes a vibrator and a drive circuit configured to input a drive signal to the vibrator to vibrate the vibrator. The drive circuit includes an output amplifier configured to output the drive signal to the vibrator based on a monitor signal, a power supply unit configured to supply a power supply voltage, and a power supply voltage controller configured to control the power supply voltage and to supply the controlled power supply voltage to the output amplifies. This driver apparatus can increase amplitude of the vibration of the vibrator, and can increase detection sensitivity to a physical quantity detection apparatus including the driver apparatus. 1. A driver apparatus comprising:a vibrator configured to vibrate in response to a drive signal input thereto, and to output a monitor signal in accordance with a vibration thereof; anda drive circuit configured to input the drive signal to the vibrator to vibrate the vibrator, an input amplifier configured to amplify the monitor signal and output the amplified monitor signal;', 'an AGC circuit unit has a gain automatically adjusted based on the signal output from the input amplifier;', 'an output amplifier configured to receive the drive signal and output the drive signal to the vibrator;', 'a power supply unit configured to supply a power supply voltage; and', 'a power supply voltage controller configured to boost the power supply voltage, and to supply the boosted power supply voltage to the output amplifier., 'wherein the drive circuit includes2. The driver apparatus according to claim 1 , further comprisinga temperature detector configured to detect a temperature,wherein the power supply voltage controller controls the power supply voltage based on the temperature.3. The driver apparatus according to claim 2 , wherein the power supply voltage controller is configured to output claim 2 , to the output amplifier one of a boosted voltage obtained by boosting the power supply voltage and the power ...

Подробнее
Номер записи: 72
26-04-2018 дата публикации

Visual Device for Designating Objectives and Objective-Designation Method Using Said Device

Номер: US20180112951A1
Автор: Alhadef Bernard, Borg Grégory, Giraud Marie-Annick, Sandoz Stéphane
Принадлежит:

The invention relates to a device for the designation of objectives, comprising a direct aiming member (D), associated with a gyroscopic unit (G) with three axes not parallel to each other and coupled firstly to 1. A device for the designation of objectives , comprising a direct aiming member , associated with a gyroscopic unit with three axes not parallel to each other and coupled firstly tomeans for analysing the signals issuing from the sighting member, said means being able to determine the direction between the sighting member and said objectives and to transmit it to the distant control station provided with action means, andsecondly to means for recalibrating the gyroscopic unit,wherein it further comprises image-acquisition means providing photography of the objectives, said acquisition means being associated with the direct-sighting member and coupled to software means for processing the images and to means for displaying said images.2. The device according to claim 1 , wherein it comprises a portable pointing appliance comprising at least one manoeuvring grip provided with a control member connected to at least one tubular element receiving said acquisition means and said image display means and carrying a member for the removable fixing of the direct sighting member.3. The device according to claim 2 , wherein said pointing appliance comprises two substantially parallel manoeuvring grips claim 2 , inclined upwards and forwards while being connected to two tubular members claim 2 , respectively top and bottom claim 2 , with parallel longitudinal axes.4. The device according to claim 2 , wherein said recalibration means comprise a box for the support and mechanical recalibration of the pointing appliance provided with means for the removable holding of said appliance claim 2 , an internal computer claim 2 , an electronic contact interface providing communication of the appliance with the control station claim 2 , and electrical supply means.5. The device ...

Подробнее
Номер записи: 73
26-04-2018 дата публикации

CIRCUIT DEVICE, ELECTRONIC DEVICE, PHYSICAL QUANTITY SENSOR, AND VEHICLE

Номер: US20180115308A1
Автор: Haneda Hideo
Принадлежит:

A circuit device includes a comparator and a flag signal generation circuit. The comparator includes a first voltage-time conversion circuit to which at least a first input signal is input and which outputs a first time information signal, a second voltage-time conversion circuit to which at least a second input signal is input and which outputs a second time information signal, and a determination circuit that determines magnitude relation of the first input signal and the second input signal, based on the first time information signal and the second time information signal. The flag signal generation circuit generates a flag signal indicating that a voltage difference between the first input signal and the second input signal is a predetermined voltage or less, based on the first time information signal and the second time information signal. 120-. (canceled)21. An A/D converter comprising:a comparator being configured to perform a comparison operation of input signals; anda control circuit being configured to set a conversion range, a first voltage-time conversion circuit being configured to receive at least a first input signal and output a first time information signal,', 'a second voltage-time conversion circuit being configured to receive at least a second input signal and output a second time information signal,', 'a determination circuit being configured to determine a magnitude relation of the first input signal and the second input signal, based on the first time information signal from the first voltage-time conversion circuit, and the second time information signal from the second voltage-time conversion circuit, and, 'wherein the comparator includes'}wherein the control circuit sets the conversion range based on the first time information signal and the second time information signal.22. The A/D converter according to claim 21 , further comprising:a flag signal generation circuit being configured to generate a flag signal used for controlling the ...

Подробнее
Номер записи: 74
18-04-2019 дата публикации

ANGULAR SPEED DERIVATION DEVICE AND ANGULAR SPEED DERIVATION METHOD FOR DERIVING ANGULAR SPEED BASED ON OUTPUT VALUE OF TRIAXIAL GYRO SENSOR

Номер: US20190113342A1
Автор: FUKUSHIMA Hidenori, KONDOH Takahiro
Принадлежит:

A first converter converts an initial attitude in an Euler angle representation into an initial attitude represented by quaternion. An updating unit updates an attitude represented by quaternion by defining the initial attitude represented by quaternion as an initial value, successively substituting output values of the triaxial gyro sensor. A second converter converts the attitude represented by quaternion into an attitude in the Euler angle representation. An angular speed derivation unit derives an angular speed based on a time-dependent change in the attitude in the Euler angle representation. A controller adjusts a period of time for derivation by an initial attitude derivation unit based on a variance value of the output value of the triaxial acceleration sensor or a variance value of the output value of the triaxial gyro sensor, when the speed is lower than a threshold value. 1. An angular speed derivation device that can be installed in a mobile object , comprising:an initial attitude derivation unit that derives an initial attitude in an Euler angle representation based on an output value of a triaxial acceleration sensor;a first converter that converts the initial attitude in the Euler angle representation derived by the initial attitude derivation unit into an initial attitude represented by quaternion;an updating unit that updates an attitude represented by quaternion by defining the initial attitude represented by quaternion and derived from conversion in the first converter as an initial value, and repeatedly solving a differential equation of the attitude represented by quaternion by successively substituting output values of the triaxial gyro sensor into the differential equation;a second converter that converts the attitude represented by quaternion and updated by the updating unit into an attitude in the Euler angle representation;an angular speed derivation unit that derives an angular speed based on a time-dependent change in the attitude in the ...

Подробнее
Номер записи: 75
04-05-2017 дата публикации

Electric Work Vehicle

Номер: US20170120755A1
Автор: Ito Hirokazu, Matsuda Kazuaki
Принадлежит:

An electric work vehicle includes a left motor which supplies rotating power to a left drive wheel, a right motor which supplies rotating power to a right drive wheel, a motor control unit which provides drive signals to the left motor and the right motor independently of each other in response to an operation relative to a steering operation unit, a yaw rate detector which detects an actual yaw rate of a vehicle body, an arithmetic yaw rate computing unit which derives an arithmetic yaw rate based on a rotating speed of the left motor or the left drive wheel and a rotating speed of the right motor or the right drive wheel, and a slip detection unit detecting occurrence of slipping based on the arithmetic yaw rate and an actual yaw rate. 1. An electric work vehicle comprising:a vehicle body including a steering operation unit;a left motor which supplies rotating power to a left drive wheel supporting the vehicle body to the ground;a right motor which supplies rotating power to a right drive wheel supporting the vehicle body to the ground;a motor control unit which provides drive signals to the left motor and the right motor independently of each other in response to an operation relative to the steering operation unit;a yaw rate detector which detects an actual yaw rate of the vehicle body;an arithmetic yaw rate computing unit which derives an arithmetic yaw rate based on a rotating speed of the left motor or the left drive wheel and a rotating speed of the right motor or the right drive wheel; anda slip detection unit detecting occurrence of slipping based on the arithmetic yaw rate and an actual yaw rate.2. The electric work vehicle according to claim 1 , wherein the slip detection unit computes a difference between the actual yaw rate and the arithmetic yaw rate; and determines that slipping occurs if the difference is equal to or greater than an upper threshold.3. The electric work vehicle according to claim 1 , wherein the slip detection unit specifies which of ...

Подробнее
Номер записи: 76
25-08-2022 дата публикации

SENSOR AND ELECTRONIC DEVICE

Номер: US20220268583A1
Автор: Gando Ryunosuke, Hiraga Hiroki, KAJI Shiori, MASUNISHI KEI, Miyazaki Fumito, Ogawa Etsuji, ONO Daiki, Tomizawa Yasushi
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, a sensor includes a sensor part including first and second sensor elements, and a circuit part. The first sensor element includes a first supporter, a first movable part capable of vibrating, first and second electrodes. The first electrode outputs a first signal corresponding to a vibration of the first movable part. The second electrode outputs a second signal corresponding to the vibration of the first movable part. The second sensor element includes a second supporter, a second movable part capable of vibrating, third and fourth electrodes. The third electrode outputs a third signal corresponding to a vibration of the second movable part. The fourth electrode outputs a fourth signal corresponding to the vibration of the second movable part. The circuit part includes a calculator. The calculator outputs a differential operation result between first and second processing signals. 1. A sensor , comprising:a sensor part including a first sensor element and a second sensor element; anda circuit part, a first supporter,', 'a first movable part supported by the first supporter, the first movable part being capable of vibrating,', 'a first electrode configured to output a first signal corresponding to a vibration of the first movable part, an orientation from the first supporter toward the first electrode being along a first direction, and', 'a second electrode configured to output a second signal corresponding to the vibration of the first movable part, a direction from the first supporter toward the second electrode being along a second direction crossing the first direction,, 'the first sensor element including'} a second supporter,', 'a second movable part supported by the second supporter, the second movable part being capable of vibrating,', 'a third electrode configured to output a third signal corresponding to a vibration of the second movable part, an orientation from the second supporter toward the third electrode being along the ...

Подробнее
Номер записи: 77
25-04-2019 дата публикации

OFFSET CORRECTION APPARATUS FOR GYRO SENSOR, RECORDING MEDIUM STORING OFFSET CORRECTION PROGRAM, AND PEDESTRIAN DEAD-RECKONING APPARATUS

Номер: US20190120627A1
Автор: OHYAMA SHIGEO
Принадлежит:

An offset correction apparatus for a gyro sensor includes an acceleration sensor, a geomagnetic sensor, a stationary determination unit that determines, by using an output value of the acceleration sensor and an output value of the geomagnetic sensor, whether the gyro sensor is stationary, a difference calculation unit that calculates an offset value of the gyro sensor by using an output value of the gyro sensor, and an offset-value update unit that assumes, as a new offset value, an offset value calculated by the difference calculation unit by using an output value of the gyro sensor determined to be stationary by the stationary determination unit. 1. An offset correction apparatus for a gyro sensor , comprising:an acceleration sensor;a geomagnetic sensor;a stationary determination unit configured to determine, by using an output value of the acceleration sensor and an output value of the geomagnetic sensor, whether the gyro sensor is stationary;an offset-value calculation unit configured to calculate an offset value of the gyro sensor by using an output value of the gyro sensor; andan offset-value update unit configured to assume, as a new offset value of the gyro sensor, an offset value calculated by the offset-value calculation unit by using an output value of the gyro sensor determined to be stationary by the stationary determination unit.2. The offset correction apparatus according to claim 1 , wherein the offset-value calculation unit is configured to calculate claim 1 , as the offset value claim 1 , a value obtained by dividing claim 1 , by a fixed time period claim 1 , a difference between a variation in Euler angles of the gyro sensor over the fixed time period and a value obtained by integrating an output value of the gyro sensor for the fixed time period.3. The offset correction apparatus according to claim 1 , wherein the offset-value calculation unit includes a Kalman filter unit and is configured to generate a state equation from an angular velocity ...

Подробнее
Номер записи: 78
16-04-2020 дата публикации

SYSTEM AND METHOD FOR MOTION BASED ALIGNMENT OF BODY PARTS

Номер: US20200116488A1
Автор: Khan Furrukh, Zhao Xiaoxi
Принадлежит:

The embodiments described herein relate to systems, methods, and devices for high precision inertial measurement sensing of functional movement and range of motion analysis with close to zero drifts in sensor orientation readings. The system calibrates IMU raw data samples after warm up, and uses a fast convergent fusion algorithm to calculate high accuracy and almost drift free orientation information. In some examples, the systems, methods, and devices are used in computer-guided or robotic surgery, to aid in evaluation before, during, and after a surgical operation. 1. A method for measuring orientations in a sensor , the method comprising:sampling within a periodic time interval Δt by an inertial measurement unit (IMU), a plurality of IMU data samples generated by a magnetometer, an accelerometer, and a gyroscope comprised in the IMU, wherein each IMU data sample is oriented according to a local frame in the IMU; reading from an on-board persistent memory, calibration parameters to correct each of the plurality of IMU data samples to stay within a pre-defined range of orientation accuracy and/or drift variations;', "executing an on-board fusion algorithm in a fixed point to rotate by an amount, to align the local frame of each corrected plurality of IMU data samples to match a world frame, and to transform the corrected plurality of IMU data samples to the corresponding plurality of sensor's orientation data samples; and", "transmitting the corresponding plurality of sensor's orientation data samples to a remote station."], "sending the plurality of IMU data samples to a microcontroller unit (MCU) to generate a corresponding plurality of sensor's orientation data samples through operations, comprising:"}2. The method according to claim 1 , wherein the local frame in the IMU forms a right handed X′ claim 1 , Y′ claim 1 , and Z′ coordinate system with respect to a common origin O′ claim 1 , and directions of X′ and Y′ axes are pre-oriented on the IMU claim 1 , and ...

Подробнее
Номер записи: 79
12-05-2016 дата публикации

Device for the detection of the attitude of auto-vehicles and corresponding method

Номер: US20160131482A1
Автор: Alessandro PESCIAROLO, Giuseppe Spinella, Saverio Armeni
Принадлежит: Magneti Marelli SpA

Described herein is a device for detecting the attitude of motor vehicles, which comprises using at least one filter of a complementary type for computing an estimate ({circumflex over (x)} i ) of angles of attitude (θ, φ, Ψ) of the motor vehicle as a function of input signals comprising an acceleration signal (A) and an angular-velocity signal (ω). According to the invention, the device ( 10 ) comprises a plurality of complementary filters ( 12 1 , . . . , 12 n ), each tuned for operating in a specific dynamic range, and a supervisor unit ( 11 ), configured for recognising the dynamic range of the input signals (A, ω) and selecting a corresponding filter ( 12 i ) from said plurality of complementary filters ( 12 1 , . . . , 12 n ).

Подробнее
Номер записи: 80
12-05-2016 дата публикации

Mobile Asset Data Recorder and Transmitter

Номер: US20160131483A1
Автор: Lawrence B. Jordan, Lisa A. MATTA
Принадлежит: Wi Tronix LLC

An acceleration-based mobile asset data recorder and transmitter equipped with a wireless processing unit, an event recorder, a digital video recorder, a fuel level sensor, and an inertial navigation sensor board. The inertial navigation sensor board includes a 3-axis gyroscope, a 3-axis accelerometer, a 3-axis magnetometer, and a microcontroller. The data recorder and transmitter allows for automatic orientation, automatic compass calibration, fuel compensation with pitch and roll, emergency brake application with impact detection, rough operating condition detection, engine running detection, and inertial navigation of a mobile asset. Users can use the normal operation of their mobile assets to locate and alert, in real-time, areas where their assets are encountering rough operating environments, to provide for quicker emergency response, and to validate the effectiveness of repairs and rerouting.

Подробнее
Номер записи: 81
10-05-2018 дата публикации

Correction of Rotation Rate Measurements

Номер: US20180128643A1
Автор: Ledroz Adrián Guillermo
Принадлежит:

Various implementations directed to correction of rotation rate measurements are provided. In one implementation, a method may include receiving rotation rate measurements about a first axis and a second axis from first gyroscopic sensors. The method may include receiving a first rotation rate measurement about a third axis from a second gyroscopic sensor. The method may include determining an estimated rotation rate measurement about the third axis based on the rotation rate measurements about the first axis and the second axis. The method may include determining a bias value based on a difference between the first rotation rate measurement about the third axis and the estimated rotation rate measurement. The method may include receiving second rotation rate measurements about the third axis from the second gyroscopic sensor. The method may include correcting the second rotation rate measurements about the third axis based on the determined bias value. 1. A method , comprising:determining an estimated rotation rate measurement about a z-axis of a survey tool disposed in a wellbore using one or more rotation rate measurements about a x-axis of the survey tool and one or more rotation rate measurements about a y-axis of the survey tool;determining a bias value based on a difference between a first rotation rate measurement about a z-axis of the survey tool and the estimated rotation rate measurement; andcorrecting one or more second rotation rate measurements about the z-axis of the survey tool based on the determined bias value.2. The method of claim 1 , wherein the one or more rotation rate measurements about the x-axis of the survey tool and the one or more rotation rate measurements about the y-axis of the survey tool are not indexed measurements.3. The method of claim 1 , wherein determining the estimated rotation rate measurement about the z-axis of the survey tool comprises determining the estimated rotation rate measurement about the z-axis using the Earth's ...

Подробнее
Номер записи: 82
23-04-2020 дата публикации

ELECTRONIC DEVICE AND POSE-CALIBRATION METHOD THEREOF

Номер: US20200124443A1
Автор: CHEN Yan-Chen, DAI Shin-Hao, Hsieh Cheng-Han, Li Huan-Hsin
Принадлежит: HTC CORPORATION

An electronic device is provided. The electronic device includes an inertial-measurement unit, an environmental-parameter database, and a computation unit. The inertial-measurement unit is configured to detect inertial information of the electronic device to generate sensor data. The computation unit is configured to perform pose estimation according to the sensor data to obtain a first pose. In response to the electronic device being in a non-moving state, the computation unit performs pose calibration on the first pose according to an environmental parameter in the environmental-parameter database corresponding to a current location at which the electronic device is located. 1. A pose-calibration method , for use in an electronic device , wherein the electronic device comprises an inertial-measurement unit and an environmental-parameter database , the method comprising:detecting inertial information about the electronic device by the inertial-measurement unit to generate sensor data;performing pose estimation according to the sensor data to obtain a first pose; andin response to the electronic device being in a non-moving state, performing pose calibration on the first pose according to an environmental parameter in the environmental-parameter database corresponding to a current location in which the electronic device is located.2. The pose-calibration method as claimed in claim 1 , further comprising:determining whether the electronic device is in a moving state;in response to the electronic device being in the moving state, estimating a first error level of the sensor data; andin response to the electronic device being in the non-moving state, estimating a current environmental parameter of a location at which the electronic device is located to obtain the first error level of the sensor data.3. The pose-calibration method as claimed in claim 2 , further comprising:obtaining the environmental parameter and its second error level recorded in a corresponding group ...

Подробнее
Номер записи: 83
17-05-2018 дата публикации

METHOD AND APPARATUS FOR A UNIVERSAL SENSOR

Номер: US20180132748A1
Автор: BYMAN DAVID K., PERKINS BRENT R.
Принадлежит: NORAXON U.S.A., INC.

A universal sensor pod provides a native sensing function during a first mode of operation and a secondary sensing function during a second mode of operation. The universal sensor pod may transition from the native sensing function to the secondary sensing function upon detecting that a sensor capable of the secondary sensing function is connected to the universal sensor pod via a smart connector. The universal sensor pod may continue one or more native sensing functions along with the secondary sensing function upon detecting that a sensor capable of the secondary sensing function is connected to the universal sensor pod via a smart connector. A code embedded within the smart connector is transmitted to a processor contained within the universal sensor pod and in response, the processor executes a firmware application that is tailored to the secondary sensing function code in response to receiving the code. 1. A universal sensor configured to be worn on a human body segment , the universal sensor comprising: a processor;', 'a first memory coupled to the processor and configured with a plurality of executable applications; and', 'a second memory; and, 'a sensor pod including,'} a first sensor configured to detect a physical property directly associated with the human body segment upon which the universal sensor is worn and further configured to provide a first signal representative of the detected physical property; and', 'a third memory configured to provide a code indicative of the detected physical property to the processor, wherein the processor is configured to execute one of the executable applications in response to the code, the executed application causing the processor to manipulate the first signal into a first result for storage in the second memory in response to receiving a first synchronization signal; and, 'a sensor assembly removably coupled to the sensor pod, the sensor assembly including,'}wherein the first result includes a first synchronization ...

Подробнее
Номер записи: 84
19-05-2016 дата публикации

Method and system of dual-mode actuation and sensing for real-time calibration of axisymmetric resonant gyroscopes

Номер: US20160139176A1
Автор: Arashk Norouz Pour SHIRAZI, Farrokh Ayazi
Принадлежит: Georgia Tech Research Corp

A dual-mode actuation and sensing circuit actuates both modes of an axisymmetric gyroscope and senses both outputs thereof. The sum of the two outputs provides a self-sustaining closed-loop oscillation signal, while the difference of the two mode outputs is used for extracting differential rate information while rejecting the common-mode bias terms of the gyroscope to provide online bias calibration. The proposed system and method facilitates scale factor calibration of an axisymmetric gyroscope. Furthermore, the difference output of the dual-mode gyroscope can provide a mode-split indicator signal which can be used to automatically match the gyroscope modes.

Подробнее
Номер записи: 85
07-08-2014 дата публикации

Drive circuit and physical quantity measuring device

Номер: US20140217931A1
Автор: Masayuki Yamaguchi
Принадлежит: Seiko Epson Corp

In order for keeping the amplitude of the excitation current of a vibrator constant irrespective not only of the temperature variation but also of the manufacturing variation and the variation in frequency, a comparison control circuit for controlling the amplitude of the drive signal for exciting the vibrator includes a comparative voltage supply circuit for supplying the comparative voltage, and the comparative voltage supply circuit generates the comparative voltage with a constant current source and a second resistor made of a material the same as a material of a first resistor included in a current-voltage conversion circuit.

Подробнее
Номер записи: 86
02-05-2019 дата публикации

Gyro Sensor Apparatus, Attitude Control System, And Camera Apparatus

Номер: US20190132515A1
Автор: Haneda Hideo, MAKI Katsuhiko
Принадлежит:

A gyro sensor apparatus includes a sensor device that outputs a detection signal, a control circuit including an angular velocity detection circuit that detects angular velocity based on the detection signal, an angle calculation circuit that calculates an angle based on the angular velocity, and an actuator drive signal generation circuit that generates an actuator drive signal based on the angle, a base body that supports the sensor device and the control circuit, and an output terminal that is provided as part of the base body and outputs the actuator drive signal or a signal based thereon. 1. A gyro sensor apparatus comprising:a sensor device that outputs a detection signal;a control circuit including an angular velocity detection circuit that detects angular velocity based on the detection signal, an angle calculation circuit that calculates an angle based on the angular velocity, and an actuator drive signal generation circuit that generates an actuator drive signal based on the angle, the actuator drive signal being usable to control an actuator drive circuit that drives an actuator;a base body that supports the sensor device and the control circuit; andan output terminal that is provided as part of the base body and outputs the actuator drive signal or a signal based on the actuator drive signal.2. The gyro sensor apparatus according to claim 1 , wherein an operation frequency of the angle calculation circuit is equal to an operation frequency of the actuator drive signal generation circuit.3. The gyro sensor apparatus according to claim 1 , wherein the actuator is a rotational stepper motor.4. The gyro sensor apparatus according to claim 1 , wherein the actuator is a DC motor or an AC motor.5. The gyro sensor apparatus according to claim 1 , further comprising:an input terminal to which control information used to control the actuator is inputted; anda storage section that stores the control information,wherein the actuator drive signal generation circuit ...

Подробнее
Номер записи: 87
09-05-2019 дата публикации

Method and device for demodulating gyroscope signals

Номер: US20190137272A1
Автор: Andrea Visconti, Francesco DIAZZI, Guangzhao Zhang
Принадлежит: ROBERT BOSCH GMBH

A method for processing signals, a gyroscope of a device generating the signals, a demodulator of the device receiving a modulated signal of the signals. In a first method step, the demodulator demodulating the modulated signal during a first time interval in such a way that a quadrature signal is generated. In a second method step, the quadrature signal is stored in a memory unit of the device. In a third method step, the demodulator demodulating the modulated signal in such a way that an in-phase signal is generated during a second time interval. In a fourth method step, an output signal for describing a rotation of the gyroscope about a defined sensing axis is generated from the in-phase signal.

Подробнее
Номер записи: 88
10-06-2021 дата публикации

Driving circuit, method for driving a mems gyroscope and a corresponding mems gyroscope

Номер: US20210172738A1
Автор: Stefano Facchinetti
Принадлежит: STMICROELECTRONICS SRL

A driving circuit for a microelectromechanical system (MEMS) gyroscope operating based on the Coriolis effect is provided. The driving circuit supplies drive signals to a mobile mass of the MEMS gyroscope to cause a driving movement of the mobile mass to oscillate at an oscillation frequency. The driving circuit includes an input stage, which receives at least one electrical quantity representing the driving movement and generates a drive signal based on the electrical quantity; a measurement stage, which measures an oscillation amplitude of the driving movement based on the drive signal; and a control stage, which generates the drive signals based on a feedback control of the oscillation amplitude. The measurement stage performs a measurement of a time interval during which the drive signal has a given relationship with an amplitude threshold, and measures the oscillation amplitude as a function of the time interval.

Подробнее
Номер записи: 89
24-05-2018 дата публикации

METHODS OF MOTION PROCESSING AND RELATED ELECTRONIC DEVICES AND MOTION MODULES

Номер: US20180143217A1
Автор: HSU Chien-Chih, Li Chin-Lung, Liou Shun-Nan
Принадлежит:

Methods of motion processing and related electronic devices and motion modules are provided. A representative method of motion processing of an electronic device, which incorporates a motion sensor and a processor, the motion sensor having sensor circuitry including a sensor clock, the processor having processor circuitry including a processor clock, includes: providing one or more samples, including at least one of an accelerometer sample or a gyroscope sample associated with the electronic device, by the motion sensor at a sampling rate according to the sensor clock; storing each of the one or more samples in a buffer of the motion sensor; fetching the samples in batches from the buffer, by the processor, at a polling rate; and performing, by the processor, a numerical integration according to the sensor clock based on the samples fetched from the buffer. 1. An electronic device , comprising:a motion sensor having sensor circuitry including a sensor clock, the motion sensor being configured to provide one or more samples, including at least one of an accelerometer sample or a gyroscope sample associated with the electronic device, at a sampling rate according to the sensor clock, wherein the motion sensor is further configured to store each of the one or more samples in a buffer of the motion sensor; anda processor having processor circuitry including a processor clock, the processor being coupled to the motion sensor and configured to perform a polling at a polling rate, wherein for each said polling the processor fetches the samples in batches from the buffer, wherein the processor is further configured to perform a numerical integration according to the sensor clock based on the samples fetched from the buffer.2. The electronic device of claim 1 , wherein:the motion sensor has a configuration register; andthe processor is configured to set the sampling rate of the motion sensor by accessing the configuration register.3. The electronic device of claim 1 , ...

Подробнее
Номер записи: 90
16-05-2019 дата публикации

A SECONDARY SENSE LOOP WITH FORCE FEEDBACK CAPABILITY

Номер: US20190145773A1
Автор: AALTONEN Lasse, COLLIN Rauli, WJUGA Konsta
Принадлежит:

A secondary sense loop for a MEMS gyroscope comprises a secondary element comprising at least one mechanical resonator, an analog front end circuitry, a digital secondary loop circuitry and an analog back end circuitry. The digital secondary loop circuitry comprises a signal path receiving at its input an analog secondary input signal representing a detection motion of a mechanical resonator and providing at its output an output signal indicating an angular velocity said MEMS gyroscope is subject to, said signal path comprising an analog-to-digital converter configured to digitize the analog secondary input signal into a digitized secondary signal, and a digital force feedback circuitry controlling operation of a closed force feedback loop configured to adjust response function of the secondary sense loop. 115.-. (canceled)16. A secondary loop for a MEMS gyroscope comprising a secondary element comprising at least one mechanical resonator , an analog front end circuitry configured to receive an analog detection signal from the secondary element and to provide an analog secondary input signal , a digital secondary loop circuitry and an analog back end circuitry , wherein said digital secondary loop circuitry comprises:a signal path receiving at its input the analog secondary input signal representing a detection motion of a mechanical resonator and providing at its output an output signal indicating an angular velocity said MEMS gyroscope is subject to, the signal path comprising an analog-to-digital converter configured to digitize the analog secondary input signal into a digitized secondary signal and a digital low pass infinite impulse response filter; and the analog-to-digital converter common with the signal path;', 'the digital low pass infinite impulse response filter common with the signal path, the digital low pass infinite impulse response filter being configured to receive at its input the digitized secondary signal, to cause a −90-degree phase shift to ...

Подробнее
Номер записи: 91
17-06-2021 дата публикации

SYSTEM AND METHOD FOR MICRO-SCALE MACHINING

Номер: US20210180951A1
Автор: CHO Jae Yoong
Принадлежит:

A method of adjusting an operating parameter of a miniature electromechanical resonator comprises measuring angular coordinates of first and second principal stiffness axes of first and second wine-glass mode of the miniature electromechanical resonator, respectively; determining first and second wine-glass mode frequencies of the resonator being resonant frequencies of the first and second principal stiffness axes, respectively; calculating one or more locations on the resonator for machining to reduce a difference between the first and second wine-glass mode frequencies; and machining the one or more locations on the resonator to reduce the difference between the first and second wine-glass mode frequencies. An apparatus for adjusting an operating parameter of a miniature electromechanical resonator comprises a vibration actuator/detector configured to measure the locations of the first and second principal stiffness axes, and a micro-machining apparatus to add or remove material from the resonator for adjusting the operating parameter thereof. 1. A method of adjusting an operating parameter of a miniature electromechanical resonator , the method comprising:measuring an angular coordinate of a first principal stiffness axis of a first wine-glass mode of the miniature electromechanical resonator;measuring an angular coordinate of a second principal stiffness axis of a second wine-glass mode of the miniature electromechanical resonator;determining a first wine-glass mode frequency of the miniature electromechanical resonator being a resonant frequency of the first principal stiffness axis;determining a first wine-glass mode frequency of the miniature electromechanical resonator being a resonant frequency of the second principal stiffness axis;calculating one or more locations on the miniature electromechanical resonator for machining to reduce a difference between the first and second wine-glass mode frequencies of the miniature electromechanical resonator; ...

Подробнее
Номер записи: 92
17-06-2021 дата публикации

Microelectromechanical gyroscope system

Номер: US20210180952A1
Автор: Chen-Tsung LIN, Kuo-Liang Wu, Min-Yu Hsieh, Yeong-Wei Wu, Ying-Wen Jan, Yung-Fu Tsai
Принадлежит: NATIONAL APPLIED RESEARCH LABORATORIES

A microelectromechanical gyroscope system is provided. The system includes a first substrate, a second substrate, and a third substrate. The substrates respectively have a first fixing, a second fixing, and a third fixing surfaces. The system further includes a first sensing, a second sensing and a third sensing module boards respectively fixed to the fixing surfaces. Each sensing module board has several microelectromechanical gyroscopes. A signal processing control board is electrically connected to the first sensing module board, the second sensing module board, and the third sensing module board. Wherein the first substrate, the second substrate, and the third substrate are perpendicular to each other. With the above structure, on each system coordinate axis of the microelectromechanical gyroscope system, at least one gyroscope is aligned with it for data acquisition and measurement. Accordingly, the measurement accuracy of the system is improved.

Подробнее
Номер записи: 93
11-06-2015 дата публикации

DETECTION DEVICE, SENSOR, ELECTRONIC APPARATUS AND MOVING OBJECT

Номер: US20150160011A1
Автор: MAKI Katsuhiko, NAKAJIMA Katsuhito
Принадлежит:

A detection device includes: a drive circuit that receives a feedback signal from a vibrator and drives the vibrator; a detection circuit that performs detection based on a signal from the vibrator and outputs detection data; and a digital signal processing unit that performs digital filtering for the detection data from the detection circuit. The digital signal processing unit performs band elimination filtering for attenuating a component of a detuning frequency Δf=|fd−fs| corresponding to a difference between a drive side resonance frequency fd and a detection side resonance frequency fs of the vibrator for the detection data. 1. A detection device comprising:a drive circuit that receives a feedback signal from a vibrator and drives the vibrator;a detection circuit that performs detection based on a signal from the vibrator and outputs detection data; anda digital signal processing unit that performs digital filtering for the detection data from the detection circuit,wherein the digital signal processing unit performs band elimination filtering for attenuating a component of a detuning frequency Δf=|fd−fs| corresponding to a difference between a drive side resonance frequency fd and a detection side resonance frequency fs of the vibrator for the detection data.2. The detection device according to claim 1 , further comprising:a storage unit that stores information on a filter coefficient for setting a frequency characteristic of the band elimination filter.3. The detection device according to claim 2 ,wherein the storage unit stores information on the plurality of filter coefficients so that each filter coefficient corresponds to each of the plurality of vibrators.4. The detection device according to claim 1 ,wherein the digital signal processing unit performs band limit low pass filtering in which a cutoff frequency is variable, andwhen a variable range of the cutoff frequency of the low pass filter is represented as fca to fcb and a center frequency of the band ...

Подробнее
Номер записи: 94
11-06-2015 дата публикации

DETECTION DEVICE, SENSOR, ELECTRONIC APPARATUS AND MOVING OBJECT

Номер: US20150160012A1
Автор: II Naoki, KURASHINA Takashi, MAKI Katsuhiko
Принадлежит:

A detection device includes a drive circuit of a physical quantity transducer, a synchronization signal output circuit, and a detection circuit that performs detection of a physical quantity signal based on a physical quantity. The synchronization signal output circuit includes a delay locked loop (DLL) circuit that includes: a delay control circuit that outputs a delay control signal and a delay circuit that includes a plurality of delay units in which a delay time is controlled by the delay control signal; an adjustment circuit that includes at least one delay unit in which a delay time is controlled by the delay control signal, and outputs a signal obtained by delaying an input signal based on the output signal from the drive circuit to the DLL circuit; and an output circuit that outputs the synchronization signal based on multi-phase clock signals from the DLL circuit. 1. A detection device comprising:a drive circuit that receives a feedback signal from a physical quantity transducer and drives the physical quantity transducer;a synchronization signal output circuit that receives an output signal from the drive circuit and outputs a synchronization signal; anda detection circuit that performs detection of a physical quantity signal corresponding to a physical quantity based on a signal from the physical quantity transducer and the synchronization signal and outputs detection data, [ a delay control circuit that outputs a delay control signal, and', 'a delay circuit that includes a plurality of delay units in which a delay time is controlled by the delay control signal,, 'a delay locked loop circuit that includes, 'an adjustment circuit that includes at least one delay unit in which a delay time is controlled by the delay control signal, and outputs a signal obtained by delaying an input signal based on the output signal from the drive circuit to the delay locked loop circuit, and', 'an output circuit that outputs the synchronization signal based on multi-phase ...

Подробнее
Номер записи: 95
31-05-2018 дата публикации

PHASE AND AMPLITUDE ADJUSTMENT FOR SENSORS

Номер: US20180152182A1
Автор: DAKSHINAMURTHY Sriraman
Принадлежит:

A device includes a micro-electro-mechanical system (MEMS) sensor and a PWM modifier circuitry. The MEMS sensor may include a drive circuitry and a sense circuitry. The MEMS sensor is configured to sense motion. A carrier signal is used in the sense circuitry and the drive circuitry. The PWM modifier circuitry is configured to generate a PWM modifier signal for modifying a portion of a PWM signal and to form a modified PWM signal to compensate for changes in the carrier signal. 1. A device comprising:a sensor configured to sense motion and output a sensed signal;a pulse width modulator (PWM) generator configured to generate a single PWM signal;a PWM modifier circuitry configured to generate a PWM modifier signal for modifying a portion of the single PWM signal and to form a modified PWM signal to compensate for changes in a carrier signal; anda demodulator configured to receive the modified PWM signal and the sensed signal, wherein the demodulator is further configured to demodulate the sensed signal with the modified PWM signal.2. The device as described by claim 1 , wherein the single PWM signal is sampled with a sampling frequency to form a plurality of samples claim 1 , and wherein the PWM modifier circuitry comprises switches configured to punch out the single PWM signal at a time corresponding to a sampled PWM signal of the plurality of samples by applying a voltage to the single PWM signal.3. The device as described by claim 1 , wherein the single PWM signal is sampled with a sampling frequency to form a plurality of samples claim 1 , and wherein the PWM modifier circuitry is configured to apply a voltage at a time corresponding to a sampled PWM signal of the plurality of samples.4. The device as described by claim 1 , wherein the modified PWM signal compensates changes to an amplitude of the carrier signal.5. The device as described by claim 4 , wherein the single PWM signal is sampled with a sampling frequency to form a plurality of samples claim 4 , and ...

Подробнее
Номер записи: 96
01-06-2017 дата публикации

PIEZOELECTRIC ELEMENT, PIEZOELECTRIC ACTUATOR, AND ELECTRONIC APPARATUS

Номер: US20170155035A1
Автор: Kubota Makoto, Matsuda Takanori, Miura Kaoru
Принадлежит:

Provided is a piezoelectric element containing no lead therein and having a satisfactory piezoelectric constant and a small dielectric loss tangent at room temperature (25° C.) In order to attain this, the piezoelectric element includes a substrate, a first electrode, a piezoelectric film, and a second electrode. The piezoelectric film contains barium zirconate titanate, manganese, and trivalent bismuth. The piezoelectric film satisfies 0.02≦x≦0.13, where x is a mole ratio of zirconium to the sum of zirconium and titanium. A manganese content is 0.002 moles or more and 0.015 moles or less for 1 mole of barium zirconate titanate, and a bismuth content is 0.00042 moles or more and 0.00850 moles or less for 1 mole of barium zirconate titanate. 1. A piezoelectric element , comprising:a substrate;a first electrode;a piezoelectric film; anda second electrode,wherein the piezoelectric film comprises barium zirconate titanate, manganese, and trivalent bismuth,wherein the piezoelectric film satisfies 0.02≦x≦0.13, where x is a mole ratio of zirconium to a sum of zirconium and titanium,wherein a manganese content is 0.002 moles or more and 0.015 moles or less for 1 mole of barium zirconate titanate, andwherein a bismuth content is 0.00042 moles or more and 0.00850 moles or less for 1 mole of barium zirconate titanate.3. A piezoelectric element according to claim 1 , wherein a maximum film thickness Tnm of the piezoelectric film at a portion sandwiched between the first electrode and the second electrode is 10 μm or less.5. A piezoelectric element according to claim 1 , further comprising an adhesion component comprising a metal of Group 4 elements and/or Group 5 elements claim 1 , and existing between the substrate and one of the first electrode and the second electrode that is formed on a surface of the piezoelectric film on the substrate side.6. A piezoelectric element according to claim 1 , wherein the piezoelectric film has an aggregate structure comprising a grain having ...

Подробнее
Номер записи: 97
07-06-2018 дата публикации

BODY MOVEMENT TRACKING

Номер: US20180153444A1
Автор: Choudhury Romit Roy, SHEN Sheng, Yang Xue
Принадлежит:

Disclosed methods, systems, and storage media may track body movements and movement trajectories using internal measurement units (IMUs), where a first IMU may be attached to a first wrist of a user, a second IMU may be attached to a second wrist of the user, and a third IMU may be attached to a torso of the user. Upper body movements may be derived from sensor data produced by the three IMUs. IMUs are typically not used to detect fine levels of body movements and/or movement trajectory because most IMUs accumulate errors due to large amounts of measurement noise. Embodiments provide arm and torso movement models to which the sensor data is applied in order to derive the body movements and/or movement trajectory. Additionally, estimation errors may be mitigated using a hidden Markov Model (HMM) filter. Other embodiments may be described and/or claimed. 1. An apparatus comprising:an acceleration engine (AE) to determine, in a global coordinate system (GCS), a right wrist acceleration based on first sensor data, a left wrist acceleration based on second sensor data, and a torso acceleration based on third sensor data;an orientation engine (OE) to determine, in the GCS, a right wrist orientation based on the first sensor data, a left wrist orientation based on the second sensor data, and a torso orientation based on the third sensor data;a relative motion engine (RME) to determine a relative acceleration of a right elbow (RARE) based on the right wrist acceleration, the right wrist orientation, the torso acceleration, and the torso orientation, or a relative acceleration of a left elbow (RALE) based on the left wrist acceleration, the left wrist orientation, the torso acceleration, and the torso orientation; anda hidden Markov Model filter (HMMF) to determine a relative position of the right elbow (RPRE) or a relative position of the left elbow (RPLE) based on the RARE and the RALE.2. The apparatus of claim 1 , wherein the AE is to:determine the right wrist ...

Подробнее
Номер записи: 98
09-06-2016 дата публикации

APPARATUS AND METHODS FOR PLL-BASED GYROSCOPE GAIN CONTROL, QUADRATURE CANCELLATION AND DEMODULATION

Номер: US20160161256A1
Автор: Lee Shungneng, Opris Ion, Pavan Shanthi, Tao Hai
Принадлежит:

This application discusses, among other things, simplified interface circuits for a gyroscope. In an example, a interface can include an automatic gain control (AGC) circuit configured to couple to driver for a proof mass of a gyroscope sensor and to drive the proof-mass to oscillate at a predefined oscillation amplitude, and a phase-locked loop (PLL) configured to receive sensed oscillation information from the proof-mass and to provide at least a first phase signal synchronized with a sinusoidal waveform of the sensed oscillation information. 1. A micro-electromechanical system (MEMS) sensor interface comprising:an automatic gain control (AGC) circuit configured to couple to driver for a proof mass of a gyroscope and to drive the proof-mass to oscillate at a predefined oscillation amplitude; anda phase-locked loop (PLL) configured to receive sensed oscillation information from the proof-mass and to provide at least a first phase signal synchronized with a sinusoidal waveform of the sensed oscillation information.2. The interface of claim 1 , wherein the PLL includes:a phase generator configured to receive a PLL clock signal and to provide the first phase signal synchronized in phase with the PLL clock signal;a voltage controlled oscillator configured to provide the PLL clock signal;a loop filter configured to receive a coarse PLL command signal and a phase error signal and to provide a PLL command signal to the VCO using the coarse PLL command signal and the phase error signal;a coarse phase frequency detector (PFD) configured to receive a square-wave representation of the oscillation information and to provide the coarse PLL command signal to the VCO; anda fine phase detector configured to receive an analog representation of the oscillation information, to receive the first phase signal and to provide the phase error information.3. The interface of claim 1 , wherein the fine PD includes:at least two sample circuits, each circuit includinga sample capacitor;a ...

Подробнее
Номер записи: 99
07-06-2018 дата публикации

Inertial Sensor

Номер: US20180156615A1
Автор: Hayashi Masahide, Maeda Daisuke, Ono Kazuo
Принадлежит: Hitachi Automotive Systems, Ltd.

In an inertial sensor that includes an angular rate detection circuit having a structure synchronized with a resonant frequency of an angular rate detection element, an object thereof is to realize an angle output having high accuracy with less integration error in an integration circuit for detecting an angle. The inertial sensor includes an angular rate detection element chip C that has a mechanical structure for angular rate detection; and a signal processing LSI chip C that is angular rate detection circuit for detecting an angular rate from the angular rate detection element chip C. The signal processing LSI chip C calculates an angle by sampling a signal obtained from the angular rate detection element chip C at a discrete time synchronized with a drive frequency of the angular rate detection element chip C 1. An inertial sensor comprising:an angular rate detection element that has a mechanical structure for angular rate detection; andan angular rate detection circuit for detecting an angular rate from the angular rate detection element,wherein the angular rate detection circuit calculates an angle by sampling a signal obtained from the angular rate detection element at a discrete time synchronized with a drive frequency of the angular rate detection element.2. The inertial sensor according to claim 1 ,wherein the signal obtained from the angular rate detection element by the angular rate detection circuit is an angular rate.3. The inertial sensor according to claim 2 ,wherein an operation clock of the angular rate detection circuit is synchronized with the drive frequency of the angular rate detection element.4. The inertial sensor according to claim 3 ,wherein signal processing in which the angular rate detection circuit calculates the angle is a time integration.5. The inertial sensor according to claim 4 ,wherein the drive frequency of the angular rate detection element is a resonant frequency of the angular rate detection element.6. The inertial sensor ...

Подробнее
Номер записи: 100