Abstract: A device for inputting command signals to a marine vessel control system includes a lever that is selectively operable in a joystick mode and a lever mode. In the lever mode, the lever is confined to pivoting about a horizontal axis to thereby input throttle and shift commands to the control system. In the joystick mode, the lever is freely pivotable in all directions away from a vertical axis that is perpendicular to the horizontal axis to thereby input throttle, shift, and directional commands to the control system.

Abstract: A method and system for testing and calibrating an accelerometer of an electronic device are provided. In accordance with one embodiment, there is a test system for an electronic device having an accelerometer with three mutually orthogonal sensing axes, the test system comprising: a test fixture having: a nest defining a cavity for receiving an electronic device; wherein the nest is configured so that, when the test fixture is substantially horizontal, a two-dimensional sensing plane defined by two of the sensing axes of the accelerometer is substantially horizontal and the third sensing axis is perpendicular to the two-dimensional sensing plane and substantially parallel to the force of gravity.

Abstract: In a mechanical test system, a method of compensating for acceleration induced load error in a load sensor in a mechanical communication with a component comprises measuring an acceleration of the component to obtain an acceleration measurement. A load sensor measures a force applied by the mechanical test system to a test sample in substantially a same direction of the acceleration to obtain a force measurement. The force measurement is modified with a transfer function that includes at least one of a gain correction and a phase correction to compensate for an error value in the force measurement attributed to movement of at least the load sensor when the force is applied to the test sample.

Abstract: Systems and methods for two degree of freedom dithering for micro-electro-mechanical system (MEMS) sensor calibration are provided. In one embodiment, a method for a device comprises forming a MEMS sensor layer, the MEMS sensor layer comprising a MEMS sensor and an in-plane rotator to rotate the MEMS sensor in the plane of the MEMS sensor layer. Further, the method comprises forming a first and second rotor layer and bonding the first rotor layer to a top surface and the second rotor layer to the bottom surface of the MEMS sensor layer, such that a first and second rotor portion of the first and second rotor layers connect to the MEMS sensor. Also, the method comprises separating the first and second rotor portions from the first and second rotor layers, wherein the first and second rotor portions and the MEMS sensor rotate about an in-plane axis of the MEMS sensor layer.

Abstract: An airflow managing system for monitoring airflow of a HVAC system, a HVAC system and a method of monitoring the airflow in a HVAC system is provided. In one embodiment, the airflow managing system includes: (1) an air pressure sensor configured to obtain an air pressure measurement directly from a scroll of an air blower of the HVAC system and (2) a HVAC controller configured to determine an airflow rate for the HVAC system based on the air pressure measurement and corresponding parameters associated with the air blower.

Abstract: A yaw rate sensor having a substrate and a seismic mass is described, in which the seismic mass is excitable to a working oscillation relative to the substrate via a drive unit, and a Coriolis deflection of the seismic mass is detectable relative to the substrate, in which the yaw rate sensor furthermore has an interrupt interface, the drive unit being configured to reduce a frequency and/or an amplitude of the working oscillation if an interrupt signal is present at the interrupt interface.

Abstract: A detection device includes a driving circuit and a detection circuit. The detection circuit includes first and second electric charge-voltage conversion circuits to which first and second detection signals are input, first and second gain adjustment amplifiers that amplify output signals of the circuits, a switching mixer that has first and second input nodes to which the output signals of the first and second gain adjustment amplifiers are input, and performs differential synchronous detection thereon on the basis of a synchronization signal from the driving circuit, so as to output first and second output signals to first and second output nodes, first and second filters that receive the first and second output signals from the first and second output nodes of the switching mixer, and an A/D conversion circuit that receives output signals from the first and second filters so as to perform differential A/D conversion thereon.

Abstract: An inertial sensing system comprises a first multi-axis atomic inertial sensor, a second multi-axis atomic inertial sensor, and an optical multiplexer optically coupled to the first and second multi-axis atomic inertial sensors. The optical multiplexer is configured to sequentially direct light along different axes of the first and second multi-axis atomic inertial sensors. A plurality of micro-electrical-mechanical systems (MEMS) inertial sensors is in operative communication with the first and second multi-axis atomic inertial sensors. Output signals from the first and second multi-axis atomic inertial sensors aid in correcting errors produced by the MEMS inertial sensors by sequentially updating output signals from the MEMS inertial sensors.

Abstract: A method and apparatus are described for sensor based detection of pedestrian motion. Based on a 3-axis accelerometer, the apparatus may differentiate between walking, running, standing still, or any random movement that the user may perform. The method may comprise the steps of performing a time domain analysis and a frequency domain analysis. The time domain analysis may be based on a Teager-Kaiser Energy Operator. The frequency domain analysis may be based on a fast Fourier transform. A apparatus for detecting pedestrian motion may comprises an accelerometer, an operator, a Teager-Kaiser Energy Operator, a first peak detection, a second peak detection, a buffer, a fast Fourier transform, a memory and a look-up table. The apparatus may be a hand held device.

Abstract: The disclosure generally relates to calculating gyroscope bias in a vehicle. Methods, apparatus and systems are disclosed. A method can include: assuming a maximum turning rate for a vehicle based at least in part on speed of the vehicle; and determining gyroscope bias information based at least in part on the assumed maximum turning rate.

Abstract: Systems and methods are provided for monitoring operation of MEMS gyroscopes (110). A test signal generator (124) is configured to generate and apply a test signal to the rate feedback loop (112) of a MEMS gyroscope (110). A test signal detector (126) is coupled to the quadrature feedback loop (114) of the MEMS gyroscope (110) and is configured to receive a quadrature output signal from the quadrature feedback loop (114). The test signal detector (126) demodulates the quadrature output signal to detect effects of the test signal. Finally, the test signal detector (126) is configured to generate a monitor output indicative of the operation of the sensing device based at least in part on the detected effects of the test signal in the quadrature output signal. Thus, the system is able to provide for the continuous monitoring of the operation of the MEMS gyroscope (110).

Abstract: Systems and methods are provided for monitoring operation of MEMS accelerometers (100). In these embodiments a control loop (112) having a forward path (114) is coupled a MEMS transducer (110), and a test signal generator (124) and test signal detector (126) is provided. The test signal generator (124) is configured to generate a test signal and apply the test signal to the forward path (114) of the control loop (112) during operation of the MEMS accelerometer transducer (110). The test signal detector (126) is configured to receive an output signal from the control loop and detect the effects of the test signal in the output signal. Finally, the test signal detector (126) is further configured to generate a monitor output indicative of the operation of the sensing device to provide for the continuous monitoring of the operation of the MEMS accelerometer (100).

Abstract: A microelectromechanical gyroscope includes a body and a sensing mass, which is movable with a degree of freedom in response to rotations of the body about an axis. A self-test actuator is capacitively coupled to the sensing mass for supplying a self-test signal. The capacitive coupling causes, in response to the self-test signal, electrostatic forces that are able to move the sensing mass in accordance with the degree of freedom at an actuation frequency. A sensing device detects transduction signals indicating displacements of the sensing mass in accordance with the degree of freedom. The sensing device is configured for discriminating, in the transduction signals, spectral components that are correlated to the actuation frequency and indicate the movement of the sensing mass as a result of the self-test signal.

Abstract: A relocation detection unit includes: an acceleration sensor adapted to detect acceleration generated in the apparatus, an arithmetic section adapted to obtain a first calculation value by performing Nth-order integration on detected value of the acceleration sensor at a predetermined timing, wherein N is a predetermined positive integer, a correction section adapted to obtain a second calculated value by adding/subtracting a specific value to/from the first calculation value at the predetermined timing, and a detection section adapted to detect that the apparatus has been relocated if the second calculated value exceeds a preset reference value.

Abstract: A method and apparatus for the precise measuring operation of a micromechanical rotation rate sensor, including at least one deflectively suspended seismic mass, at least one drive device for driving the seismic mass, and at least one first and one second trimming electrode element, which are jointly assigned directly or indirectly to the seismic mass, a first electrical trimming voltage (UTO1, UTLO1, UTRO1) being set between the first trimming electrode element and the seismic mass, and a second electrical trimming voltage (UTO2, UTLO2, UTRO2) being set between the second trimming electrode element and the seismic mass, the first and the second electrical trimming voltages being set at least as a function of a quadrature parameter (UT) and a resonance parameter (Uf).

Abstract: A sensor with continuous self test is provided. An exemplary inertial sensor may include one or more self test electrodes so that one or more test signals may be applied to the electrodes during normal operation of the sensor. Normal sensor output may be read and stored during normal operation, when self test signals are typically not applied to the sensor. The normal sensor output provides a baseline for comparison to a sensor offset error detection signal produced when a test signal may be applied to one self test electrode, and also to a sense error detection signal when a test signal may be applied to both self test electrodes.

Abstract: In one aspect, an apparatus for estimating a characteristic of a sensor is disclosed that in one embodiment may include a chamber housing sensor, wherein the sensor includes a suspended movable force mass having an opening therethrough, a first partially reflective member that moves with the force mass and a second partially reflective member spaced from the first partially reflective member, a source of buoyant fluid configured to supply the buoyant fluid to the chamber at a plurality of pressures, a device for directing light to the first and second partially reflective members at a plurality of angles, a detector for providing signals corresponding to light passing through the second partially reflective member corresponding to each of the plurality of angles and each of the plurality of pressures, and a processor for determining the characteristic of the sensor from the signals provided by the detector.

Abstract: An angular velocity detection apparatus includes a vibrator that generates a signal that includes an angular velocity component and a vibration leakage component, a driver section that generates the drive signal, and supplies the drive signal to the vibrator, an angular velocity signal generation section that extracts the angular velocity component from the signal generated by the vibrator, and generates an angular velocity signal corresponding to the magnitude of the angular velocity component, a vibration leakage signal generation section that extracts the vibration leakage component from the signal generated by the vibrator, and generates a vibration leakage signal corresponding to the magnitude of the vibration leakage component, and an adder-subtractor section that adds the vibration leakage signal to the angular velocity signal, or subtracts the vibration leakage signal from the angular velocity signal, in a given ratio to correct temperature characteristics of the angular velocity signal.

Abstract: A movement detection system is provided with a wireless terminal, and a movement detection device connectable to the wireless terminal via a wireless network such that the wireless terminal receives signals used for detection at a predetermined frequency from the movement detection device, and transmits verification signals in response to each of the detection signals. The movement detection device includes a measurement portion that measures the signal strength of the verification signals transmitted by the wireless terminal, and a detection portion that detects spatial movement of the wireless terminal based on the signal strength of the verification signals measured by the measurement portion.

Abstract: Failures can be detected with high accuracy even the ambient temperature changes or background vibration is applied.

Abstract: Gyroscopes that can compensate frequency mismatch are provided. In this regard, a representative gyroscope, among others, includes a top substrate including an outermost structure, a first driving structure and a first sensing structure. The first driving structure and the first sensing structure are disposed within the outermost structure. The first driving structure and the first sensing structure include a first driving electrode and a first sensing electrode that are disposed on a bottom surface of the first driving structure and first sensing structure, respectively. A portion of the mass on the top surface of the first sensing structure is removed. The gyroscope further includes a bottom substrate that is disposed below the top substrate. The bottom substrate includes a second driving electrode and a second sensing electrode that are disposed on a top surface of the bottom substrate and below the first driving electrode and the first sensing electrode.

Abstract: An electronic device includes a storage unit that stores reference data for executing each of functions, an acceleration sensor that detects acceleration of the electronic device in at least two axes perpendicular to each other, a motion detection unit that detects a consecutive motion of the electronic device based on the acceleration of the electronic device and generates data of the detected motion of the electronic device, a correction range determination unit that determines a correction range based on data of a motion in a predetermined section of the data of the motion of the electronic device, a correction unit that corrects the motion of the electronic device to a rectilinear motion when the motion of the electronic device is in the correction range, and an execution control unit that judges each of the functions to be executed based on the motion of the electronic device and the reference data.

Abstract: A method for calibrating a selected yaw rate sensor includes: determining a scaling function between a yaw rate sensitivity and a test signal sensitivity of a yaw rate sensor selected for carrying out a test and denoted as first sampling yaw rate sensor is determined in a first method step, the scaling function being determined from a measured first sample yaw rate sensitivity and from a measured first sample test signal sensitivity of the sampling yaw rate sensor; calculating a production yaw rate sensitivity for a yaw rate sensor denoted as production yaw rate sensor from a measured production test signal sensitivity of the production yaw rate sensor and the scaling function; and subsequently calibrating the production yaw rate sensor with the aid of the production yaw rate sensitivity.

Abstract: A rotational rate sensor is provided having a substrate and a Coriolis element, the rotational rate sensor having a drive means for exciting the Coriolis element to a Coriolis oscillation, and the rotational rate sensor having a detection device for producing a sensor signal as a function of a deflection of the Coriolis element relative to the substrate on the basis of a Coriolis force acting on the Coriolis element, and in addition the rotational rate sensor being configured to carry out a self-calibration when a rotational acceleration signal produced as a function of the sensor signal falls below a specified threshold value.

Abstract: Error sources related to aerodynamics of an inertial sensor resonator are detected by modulating the distance between the resonator and the underlying substrate and sensing modulated error signals in the accelerometer that are induced by such modulation. Compensating signals may be provided to substantially cancel errors caused by such error sources.

Abstract: A method and a system for identifying failures in an aeroengine. The system includes: a mechanism defining a set of standardized indicators representative of operation of the aeroengine; a mechanism constructing an anomaly vector representative of a behavior of the engine as a function of the set of standardized indicators; a mechanism selecting in an event of an anomaly being revealed by the anomaly vector a subset of reference vectors having directions belonging to a determined neighborhood of a direction of the anomaly vector, the subset of reference vectors being selected from a set of reference vectors associated with failures of the aeroengine and determined using criteria established by experts; and a mechanism identifying failures associated with the subset of reference vectors.

Abstract: A calibration system (20) configured for communication with an inertial sensor (22) includes a signal generator (24) and processing system (26). A calibration process (60) performed using the calibration system (20) includes applying (90) an electrical stimulus (44) to the inertial sensor (22), receiving an output signal (46) from the sensor (22) produced in response to the electrical stimulus (44) and determining a sensitivity (108) of the inertial sensor (22) to the electrical stimulus (44) in response to the output signal (46) and an applied voltage of the electrical stimulus (44). A sensitivity (112) of the inertial sensor (22) to an inertial stimulus is calculated using the sensitivity (108) and a measured resonant sensitivity (114) of the inertial sensor (22), and the calculated sensitivity (112) is utilized to adjust a gain value (56) for the inertial sensor (22) to calibrate the sensor (22).

Abstract: Methods and systems for use in monitoring a tachometer are provided. A method for use in correcting a signal from a tachometer coupled to a rotating shaft in a wind turbine includes receiving a raw tachometer signal from the tachometer coupled to a wind turbine shaft, the signal indicating the speed and/or angular position of the shaft, determining a cyclic error exists in the raw tachometer signal, and providing a corrective signal to adjust a torque within the wind turbine using the determined cyclic error.

Abstract: An apparatus for calculating a wheel speed is described herein which includes a tire force sensor, a time measurement unit, an angular velocity calculation unit and a wheel speed calculation unit. The tire force sensor outputs a signal in accordance with an amount of modification of a bearing. The time measurement unit measures a time interval between peak values of the signal output from the tire force sensor. The angular velocity calculation unit calculates an angular velocity by dividing an angle between balls positioned within the bearing by the time interval measured by the time measurement unit. The wheel speed calculation unit calculates the wheel speed by multiplying a distance from a center of the bearing to a center of the ball by the angular velocity calculated by the angular velocity calculation unit.

Abstract: A method and system for calibrating a wireless sensor device are disclosed. In a first aspect, the method comprises determining a vertical calibration vector and determining a rotation matrix using the vertical calibration vector to line up native axes of the wireless sensor device with body axes. In a second aspect, a wireless sensor device comprises a processor and a memory device coupled to the processor, wherein the memory device includes an application that, when executed by the processor, causes the processor to determine a vertical calibration vector and to determine a rotation matrix using the vertical calibration vector to line up native axes of the wireless sensor device with body axes.

Abstract: A downhole sensor calibration apparatus includes a rotational or gimbaling mechanism for guiding a sensing axis of an orientation responsive sensor through a three-dimensional orbit about three orthogonal axes. A method includes using measurements taken over the three-dimensional orbit to calibrate the sensor and determine other characteristics of the sensor or tool.

Abstract: A method and system for testing and calibrating an accelerometer of an electronic device are provided. In accordance with one embodiment, there is a method of testing and calibrating an accelerometer of an electronic device, comprising: detecting the electronic device within a nest of a test fixture; calculating an offset value for each sensing axis of the accelerometer in response to detecting the electronic device within the nest; and storing the offset values in a memory of the electronic device.

Abstract: Reliability and accuracy of a sensor are secured while adjustment cost of a sensor module is suppressed. A signal component analysis part 10 receives a signal output from a signal processing part 7 before passing through a low-pass filter 8, analyzes whether or not application of a fragile frequency with respect to a physical quantity is equal to or more than a threshold level, if the application of the fragile frequency is equal to or more than the threshold level, outputs output stop signals to output signal control parts 9, 16. The output signal control parts 9, 16 receive control signals output from the signal component analysis part 10, and outputs an acceleration signal and a physical quantity signal from which noise has been removed by the low-pass filters 8, 15 through the signal processing parts 7, 14.

Abstract: An integrated inertial sensing device. The device includes a substrate member. The device also has a first inertial sensing device comprising at least a first material and configured to detect at least a first direction. The device has a second inertial sensing device comprising at least the first material and configured to detect at least a second direction. The device also has a third inertial sensing device comprising at least a quartz material and configured to detect at least a third direction. The three devices can be integrated to form an integrated inertial sensing device.

Abstract: An angular velocity sensor includes a sensor unit, a detection unit and a connecting part electrically connecting the sensor unit and the detection unit. The detection unit drives the sensor unit and detects an angular velocity acting on the sensor unit. The detection unit supplies a carrier signal to a movable electrode of a capacitor of the sensor unit and supplies a driving signal to a fixed electrode of the capacitor via the connecting part for performing a servo control. A C/V converter circuit of the detection unit receives capacitance generated at the capacitor through a driving signal transmission line of the connecting part in a state where supply of the driving signal is stopped, and converts the capacitance into a voltage. A determination part of the detection unit determines whether the driving signal transmission line has disconnection or not based on the voltage outputted from the C/V converter circuit.

Abstract: A personal mobile device housing contains a display screen, a wireless telephony communications transceiver, and a battery charger interface. A temperature sensor and a gyro sensor whose zero turn rate output contains an offset are also included. A lookup table has gyro zero turn rate offset correction values associated with different temperature values. A programmed processor accesses the lookup table to correct the output of the gyro sensor for zero turn rate offset. It is automatically determined, during in-the-field use, when the device is in a motionless state, and the output of the temperature and gyro sensors are read. The read gyro output is written to the lookup table as part of a pair of associated temperature and zero turn rate offset correction values. Other embodiments are also described and claimed.

Abstract: A rotary transducer has a detector device with a measurement sensor, used to generate a measurement signal representative of angular position and/or velocity of an object. The detector device has a rotary bearing and a material measure that can be rotated relative to the measurement sensor and is arranged in the measurement field of the latter. A monitoring device, connected to the measurement sensor, which can provide a state signal representative of the state of wear of the rotary transducer, is integrated in the rotary transducer. In order to be able to timely warn of mechanical failure of the rotary transducer, the monitoring device is provided with a register that can permanently store as value representative of the state of wear of the rotary bearing and is formed from the information relating to the angular position and/or velocity contained in the measurement signal.

Abstract: An inertial force sensor of the present invention includes a detection element, a detection circuit for detecting the amount of inertia corresponding to the inertial force applied to the detection element; a first low-pass filter connected to the output side of the detection circuit; and a correction circuit for correcting the output of the first low-pass filter. The correction circuit includes a correction amount generation unit connected to the output side of the first low-pass filter; a correction amount storage unit connected to the output side of the correction amount generation unit; and a correction unit to connected to the output side of the first low-pass filter and to the output side of the correction amount storage unit. The correction unit corrects an output value of the first low-pass filter based on a correction amount stored in the correction amount storage unit.

Abstract: The present invention relates to a method for adjusting the resonant frequencies of a vibrating microelectromechanical (MEMS) device. In one embodiment, the present invention is a method for adjusting the resonant frequencies of a vibrating mass including the steps of patterning a surface of a device layer of the vibrating mass with a mask, etching the vibrating mass to define a structure of the vibrating mass, determining a first set of resonant frequencies of the vibrating mass, determining a mass removal amount of the vibrating mass and a mass removal location of the vibrating mass to obtain a second set of resonant frequencies of the vibrating mass, removing the mask at the mass removal location, and etching the vibrating mass to remove the mass removal amount of the vibrating mass at the mass removal location of the vibrating mass.

Abstract: The present invention relates to a method for adjusting the resonant frequencies of a vibrating microelectromechanical (MEMS) device. In one embodiment, the present invention is a method for adjusting the resonant frequencies of a vibrating mass including the steps of patterning a surface of a device layer of the vibrating mass with a mask, etching the vibrating mass to define a structure of the vibrating mass, determining a first set of resonant frequencies of the vibrating mass, determining a mass removal amount of the vibrating mass and a mass removal location of the vibrating mass to obtain a second set of resonant frequencies of the vibrating mass, removing the mask at the mass removal location, and etching the vibrating mass to remove the mass removal amount of the vibrating mass at the mass removal location of the vibrating mass.

Abstract: An acceleration detection device is provided with a zero point correction unit for correcting a zero point position of a sensor signal value by using the correction amount (absolute value of a correction value) based on the acceleration when the vehicle transitions from a stopped state on a sloping road to a running state. The acceleration detection device is also provided with a correction amount restriction unit for restricting the correction amount, thereby suppressing calculation of an excessive correction amount due to road surface irregularities or movement of the occupant and deterioration in correction accuracy.

Abstract: Methods and systems for identifying a spatial relationship between a frame of reference associated with an accelerometer mounted in a vehicle and a frame of reference associated with the vehicle Accelerometer data is received from an accelerometer and vehicle data is received from a vehicle network of the vehicle, a long term average of the accelerometer data is used to determine the direction of gravity in the frame of reference of the vehicle. In addition the vehicle date is used to determine changes in speed of the vehicle, and thus to determine the direction of the longitudinal axis of the vehicle in the frame of reference of the vehicle. From these determined directions, the spatial relationship between the frames of reference may be determined.

Abstract: In an angular velocity sensor, there is generated a first parasitic capacitance generated between a first driving electrode and a sensing electrode, and there is generated a second parasitic capacitance generated between a second driving electrode and the sensing electrode. The ratio of the amplitude of a first drive signal to the amplitude of a second drive signal is set to the reciprocal of the ratio of the first parasitic capacitance to the second parasitic capacitance. This allows the noise contents generated by capacitive coupling to be efficiently offset, thereby improving detection accuracy of an angular velocity sensing signal.

Abstract: A controller for determining whether a previously-detected vehicle malfunction still exists. If the malfunction is no longer detected in the sensor signals, a vehicle control system operates in a first operational state or normal operational state with respect to the previously-malfunctioning sensor (e.g., signals from the sensor are used to control the vehicle). If the malfunction continues to be detected, the vehicle control system operates in a second operational state or malfunction state with respect to the malfunctioning sensor in which the signals from the sensor are not used to control the vehicle.

Abstract: A system, computer readable storage medium and method for calibrating sensors of a human interface device having a first accelerometer and a second accelerometer and the method includes calibrating the first accelerometer, calibrating the second accelerometer and calibrating a combined-sensor output that includes contributions from the first accelerometer and the second accelerometer to generate combined-sensor conversion values. The method further includes adjusting the calibration of the first accelerometer in accordance with the combined-sensor conversion values.

Abstract: A method for compensating for the quadrature of a micromechanical structure, the micromechanical structure having a substrate having a main extension plane, a seismic mass that is attached by spring elements to the substrate, and first and second compensation electrodes anchored to the substrate; in response to application of a first quadrature voltage between the first compensation electrode and the seismic mass, a first compensation force being produced on the seismic mass and, in response to application of a second quadrature voltage between the second compensation electrode and the seismic mass, a second compensation force being produced on the seismic mass and, in addition, the second quadrature voltage being adjusted as a function of the first quadrature voltage.

Abstract: A controller for determining whether a previously-detected vehicle wheel speed sensor malfunction still exists. The controller includes an electronic, non-volatile memory, and an electronic processing unit connected to the electronic, non-volatile memory. The electronic processing module includes a malfunction monitoring module, a failure handling module, and a signal checking module. The malfunction monitoring module monitors the operation of at least one wheel speed sensor and generates a fault signal when the at least one sensor malfunctions. The failure handling module causes drive cycle information and the fault information to be stored in the electronic, non-volatile memory. The signal checking module performs a signal check on information from the at least one wheel speed sensor. A tell-tale indicator is deactivated and/or a vehicle control system resumes normal operation if the wheel speed sensor passes the signal check.

Abstract: A microelectromechanical gyroscope includes a body and a sensing mass, which is movable with a degree of freedom in response to rotations of the body about an axis. A self-test actuator is capacitively coupled to the sensing mass for supplying a self-test signal. The capacitive coupling causes, in response to the self-test signal, electrostatic forces that are able to move the sensing mass in accordance with the degree of freedom at an actuation frequency. A sensing device detects transduction signals indicating displacements of the sensing mass in accordance with the degree of freedom. The sensing device is configured for discriminating, in the transduction signals, spectral components that are correlated to the actuation frequency and indicate the movement of the sensing mass as a result of the self-test signal.

Abstract: Aspects of the disclosure relate to computing technologies. In particular, aspects of the disclosure relate to mobile computing device technologies, such as systems, methods, apparatuses, and computer-readable media for improving calibration data by increasing the diversity of orientations used for generating the calibration data. In one embodiment, the computing device receives a plurality of calibration measurements associated with one or more sensors of a device, determines a degree to which the plurality of calibration measurements were captured at different orientations of the device, and determines, based on the degree, whether to update one or more calibration parameters.

Abstract: A resonator comprising: a frame; a first oscillator configured to oscillate with respect to the frame; a first driver configured to drive the first oscillator at the first oscillator's resonant frequency; a first half of a first relative position switch mounted to the first oscillator; a second oscillator having substantially the same resonant frequency as the first oscillator, wherein the first and second oscillators are designed to respond in substantially the same manner to external perturbations to the frame; a second half of the first relative position switch mounted to the second oscillator; and wherein as the first oscillator oscillates there is relative motion between the first and second oscillators such that the first relative position switch passes through a closed state in each oscillation when the first and second switch halves pass by each other.