Abstract: A velocity detection device includes a rotational direction discriminator calculating an x coordinate or a y coordinate in temporary coordinates on a line between an origin of the coordinates and a point obtained by rotating the actual second coordinates by as much as a rotational angle ? in a direction of a coordinate axis, the rotational direction discriminator discriminating a rotational direction from the actual first coordinates to the actual second coordinates based on either a sign of the x or y coordinate in the temporary coordinates; and a processor calculating calculational second coordinates represented by a multiplication, addition or subtraction between the actual first coordinates and one of the trigonometric function values to make calculational second coordinates closer to the actual second coordinates, and calculating the velocity of the moving body based on the temporary angles corresponding to the trigonometric function value used for the calculational second coordinates.

Abstract: A method for operating a vehicle is provided. The method includes, in one example during a first a rate of change of an inclination of the vehicle, adjusting a fuel level indication based on the inclination and a level of fuel within the fuel tank; and during a second rate of change of the inclination different from the first rate of change, adjusting the fuel level indication based on actual fuel consumption of the engine. In this way, it is possible to provide an accurate fuel level indication based on the inclination when the inclination is not changing too quickly. However, when inclination is changing quickly and may give degraded level readings, it is still possible to provide an accurate fuel level by transiently estimating fuel usage and using, for example, a previous fuel level reading from when the inclination was not changing too quickly.

Abstract: A controller for indicating whether a previously-detected, acceleration-sensor malfunction no longer exists. The controller includes an electronic memory and an electronic processing unit connected to the electronic memory. The electronic processing module includes a malfunction monitoring module, a failure handling module, and a signal checking module. The signal checking module performs a signal check after the malfunction monitoring module generates the fault signal. The signal check includes executing a signal check function with a lateral acceleration signal. Also disclosed is a vehicle including the controller, and a method executed by the controller.

Abstract: In order to determine a signal offset (OFS_SIG) of a roll rate sensor in a vehicle (10), a roll rate sensor signal (OMEGA_ROLL_SIG) is detected. A transversal acceleration (AC) of the vehicle (10) is determined. A temporal derivative (DRV_AC) of the transversal acceleration (AC) is determined. Verification is made as to whether a value of the temporal derivative (DRV_AC) of the transversal acceleration (AC) is smaller than a predefined first threshold value (THD—1). The signal offset (OFS_SIG) of the roll rate sensor is determined in accordance with the roll rate sensor signal (OMEGA_ROLL_SIG) if the value of the temporal derivative (DRV_AC) of the transversal acceleration (AC) is smaller than the predefined first threshold value (THD—1).

Abstract: A method for adjusting an acceleration sensor which includes a substrate and a seismic mass, the acceleration sensor having first and further first electrodes attached to the substrate on a first side, counter-electrodes of the seismic mass being situated between the first and further first electrodes, the acceleration sensor having further second electrodes on a second side and further fourth electrodes on a fourth side opposite the second side, an essentially equal first excitation voltage being applied to the first and further first electrodes in a first step for exciting a first deflection of the seismic mass along a first direction, the first deflection being compensated in a second step by applying a first compensation voltage to the further second and further fourth electrodes.

Abstract: A method for determining the amount of laundry in a laundry treating appliance comprises a drum defining a treating chamber for receiving the laundry and a motor for rotating the drum that may be operated to simulate a spring to oscillate the drum relative to a predetermined rotational position. The angular decay of the drum relative to the predetermined position may be determined and used to determine the amount of laundry.

Abstract: An acceleration-sensing device having error correction includes a stator having at least one conductor affixed to a surface and a proof mass having a first conductor affixed at a first location relative to the at least one conductor affixed to a surface of the stator. The proof mass includes a second conductor affixed at a second location relative to the at least one conductor affixed to a surface of the stator, wherein an excitation signal applied to the first conductor of the proof mass brings about a force on the proof mass in the plane of motion of the proof mass that is substantially equally opposed by a force resulting from an excitation signal applied to the second conductor of the proof mass in the plane of motion of the proof mass.

Abstract: Methods and apparatus for accelerometer autocalibration in a mobile device are provided. In an example, a signal is received from the accelerometer. A substantially constant state of the signal, such as that caused by a freefall of the accelerometer, is detected. When the signal remains in the substantially constant state for at least a predetermined period of time, the signal's noise level is measured. A compensating signal based upon the measured noise level is determined and can be output to the accelerometer, thus compensating the accelerometer to mitigate the noise level. In examples, the compensating signal can be a reference voltage, a reference frequency, and/or a reference pulse train. In a further example, the compensating is performed only when the noise level of the signal is within a range for at least the predetermined period of time.

Abstract: A sensor accuracy adjustment program for an analog angle sensor used in an AC servomotor control. A step (S3) of applying an adjustment value update processing to adjustment values in adjustment areas in an adjustment table depending on the result of the comparison of the value of a command rate with the value of the rate of an adjustment processing target by using the adjustment table in which changeable adjustment values used for adjustment calculation are arranged for each of the adjustment areas in which the range of a motor shaft rotation angle is divided for use as a unit of an adjustment processing, a step (S0) of applying the adjustment calculation to the target rate value by using the adjustment values after the update, and a step (S4) for judging the state in which the step (S4) is implemented in order to apply the step (S3) to all the adjustment areas of the adjustment table are functioned to the servo driver.

Abstract: A method and apparatus for calibrating wheel speed signals measured by wheel rpm sensors in a vehicle equipped with at least one longitudinal acceleration sensor integrates the signal of the longitudinal acceleration sensor during the acceleration or deceleration phases of the vehicle, and the resulting vehicle speed signal is compared against the signals of the individual wheel rpm sensors. A determination is made as to whether a deviation that may exist for a wheel lies within a predefined tolerance range. If a deviation falls outside of the tolerance range, the parameterized tire circumference of the associated wheel is adaptively recalibrated until the deviation falls within the tolerance range.

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 provides, as one aspect, an apparatus for inspecting a sensor module including at least one held sensor in a housing having a plurality of outer surfaces. The held sensor detects acceleration or angular velocity. The apparatus includes a holding unit that has an apparatus-side surface and holds the housing in a state where one of the outer surfaces of the housing serving as a housing-side surface contacts the apparatus-side surface, a driving unit that moves the holding unit, a first obtaining unit that, in a state where the housing-side surface contacts the apparatus-side surface, obtains an output from the held sensor, at least one reference sensor that has a detection axis and is provided such that a direction of the detection axis matches a direction of a reference axis of the held sensor, and a second obtaining unit that obtains an output from the reference sensor.

Abstract: A method and system are provided for obtaining data for calibrating an accelerometer. The method and system operate by using at least one magnetometer reading to detect that a first orientation is being maintained; obtaining a plurality of accelerometer readings at the first orientation; using at least one magnetometer reading to detect that a plurality of additional orientations are being maintained and, for each orientation, obtaining a plurality of accelerometer readings at that orientation; determining calibration parameters comprising, for each axis of the accelerometer, at least one of a gain value and an offset value, using the plurality of accelerometer readings at the first and plurality of additional orientations; and applying the calibration parameters to subsequent accelerometer readings.

Abstract: According to a method for initializing an indicating instrument for a vehicle, zero-reset processing is performed. In the zero-reset processing, a control device is made to control a drive signal to rotate a pointer in a zero-reset direction in order to force a step motor to lose synchronization. Furthermore, synchronization loss detection processing is performed. In the detection processing, a physical phenomenon generated in a rotary drive system due to forcible synchronization loss of the motor during the zero-reset processing, is detected. Then, an electrical angle of the drive signal at a time of detection of the phenomenon is selected as a synchronization loss electrical angle. Finally, zero point setting processing is performed. In the setting processing, the electrical angle phase-shifted from the synchronization loss electrical angle in an indication value increasing direction by 180 degrees or less, is set as a zero point stored in the control device.

Abstract: A method and a device are described for determining the rotational direction and/or rotational speed of a rotatable body on the basis of a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed of the rotatable body and are output by a sensor, having at least one of the following steps: recording a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed, at a point in time; determining a phase value from the sine signal and cosine signal; recording sine signals and cosine signals, which is assignable to the rotational direction and/or rotational speed, at points in time; determining phase values from the corresponding sine signals and cosine signals; calculating phase differences from the phase values and the phase value; and determining the rotational direction and/or rotational speed from the phase differences on the basis of a Vernier method.

Abstract: The method of calibrating a scale factor of an axially-symmetrical vibrating rate gyro operating by applying an amplitude control signal (CA) and a precession control signal (CP) to a vibrator member (1) set into vibration at a given frequency comprises a pre-calibration step consisting in calculating a reference gain ratio between a drive gain (Gmx) in a first direction and a drive gain (Gmy) in a second direction in modal quadrature with the first direction, and in storing the reference gain ratio, and a calibration step consisting in calculating a value for a measurable magnitude associated with the scale factor by a proportionality relationship including the reference gain ratio, and calculating a corrected scale factor on the basis of the value of the measurable magnitude and the stored reference gain ratio.

Abstract: In a method of detecting an angular velocity V? of an angular velocity sensor including a vibrating body, a monitoring signal Vm(t) sensing a displacement of the vibrating body in a first direction and a sensing signal Vs(t) sensing a displacement of the vibrating body in a second direction crossing the first direction are detected. A difference in time between a first feature point where the monitoring signal Vm(t) crosses a first reference level and a second feature point where the sensing signal Vs(t) crosses a second reference level is set as ?t, a sensing direct-current voltage corresponding to an amplitude of the sensing signal Vs(t) is set as Vsd, a driving frequency is set as fd, and the angular velocity V? is calculated from formula of V?=Vsd×sin(2·?·fd·?T).

Abstract: There is described a method for monitoring a drive device for a defective sensor signal from a first sensor of the drive device and to a monitoring device which is suitable for this purpose. Although sensors operate reliably, sensor errors which may give rise to significant damage if they are not detected may arise. Monitoring the sensor makes it possible to increase the reliability of the drive device. The sensor signal from the first sensor is compared with a sensor signal from a second sensor in such a manner that the first sensor is monitored. In this case, the monitoring device is intended, in particular, for a sensor having a sensor disc.

Abstract: A method and system for calibrating a digital speedometer display to match an analog speedometer indicated value. The method generally includes calibrating each analog speedometer unit such that the exact deviation or “offset” from the center point of the analog speedometer is known. This measured deviation is then used to adjust the value input to the digital display thereby making the digital display value match the indicated value of the analog speedometer.

Abstract: Provided is a calibration apparatus, including: a holder for fixing an electronic device; a first motor for rotating the holder with a first rotation axis as a center; a second motor for rotating the holder with a second rotation axis perpendicular to the first rotation axis as a center; and a stopper for restricting a rotational position of the holder about the second rotation axis to a range between a reference position and a perpendicular position reached by rotating the holder by 90 degrees from the reference position, in which the first motor rotates the holder to which the electronic device is fixed at a predetermined speed in each of states in which the rotational position of the holder about the second rotation axis falls in the reference position and in which the rotational position of the holder about the second rotation axis falls in the perpendicular position.

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 testing system tests or calibrates an electronic test subject while rotating the test subject within a thermally controlled chamber. The testing system includes a stationary thermal chamber, a test subject, testing electronics that receive electronic data from the test subject, and a rotating platform inside the thermal chamber to which both the test subject and the testing electronics are mounted. The testing system further includes a platform cover for the rotatable platform that rotates with the rotatable platform, and exposes the test subject to the temperature inside the thermal chamber and insulates the testing electronics from the temperature inside the thermal chamber.

Abstract: An accelerometer is provided having a power circuit, a detection circuit, and a compensation circuit. The compensation circuit is operative to measure an offset voltage occurring between an output reference voltage from the power circuit and an output voltage from the detection circuit state, store the offset voltage during a zero acceleration, and output the stored offset voltage to alter the output voltage of the detection circuit.

Abstract: The method and apparatus in one embodiment may have: operating one of two resonators of a class II coriolis vibratory gyro in a closed loop mode and another of the two resonators in an open loop whole angle mode; sensing an angular rate by each of the two resonators; calibrating the scale factor of the closed loop resonator to yield the same integrated whole angle as measured by the open loop resonator; reversing operation of the two resonators such that the one of two resonators is operated in an open loop mode and the another of the two resonators in a closed loop whole angle mode; and alternately proceeding between open and closed loop operation of the two resonators, thereby self-calibrating scale factors respectively of the two resonators.

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: An inertial system design approach that can sense and tolerate failures of individual single dimensional acceleration and/or rotation sensors with a minimal number of sensors. Sets of 4 single dimensional acceleration and/or rotation sensors can provide full 3 dimensional sensing in spite of a sensor malfunction or failure, and sets of 3 single dimensional acceleration and/or rotation sensors can provide full 2 dimensional sensing in spite of a sensor malfunction or failure.

Abstract: An indicating instrument for a vehicle includes a step motor including a field winding, a pointer, a stopper device for stopping the pointer, which is rotating in a zero-reset direction, at a stopper position, a detecting device for detecting induced voltage of the field winding at each of detecting points, a control device for performing zero-reset control, whereby a drive signal is controlled to rotate the pointer in the zero-reset direction. In a state of abnormal detection in which the induced voltage larger than a predetermined set value is detected at a zero point; and the induced voltage equal to or smaller than the set value is detected at a next detecting point to the zero point, the control device assumes synchronization loss of the step motor and continues the zero-reset control until an assumptive electrical angle corresponding to a rotational position of the pointer reaches the zero point.

Abstract: A method of verifying the operation of an accelerometer is provided. The method includes channeling a high frequency signal through a positive lead of the accelerometer, and detecting a signal at a negative lead of the accelerometer. If the detected signal is substantially similar to the high frequency signal channeled through the positive lead, the integrity of the accelerometer is verified.

Abstract: A method for calibrating a multiple-triad triaxial accelerometer is provided. The method may include receiving accelerometer measured output from a first measurement triad and at least one additional measurement triad of the accelerometer. The method may further include aligning the output of a x, y, and z components of the first measurement triad to be substantially orthogonal with respect to each other, aligning the output of x, y, and z components of at least one additional measurement triad to be substantially orthogonal with respect to each other, and rotating the output of at least one measurement triad so the outputs of all measurement triads substantially align with each other. The method may further include storing the result of the alignment and rotation associated with at least one calibration function associated with the multiple-triad triaxial accelerometer. The alignment and rotation may be performed substantially simultaneously.

Abstract: In a method for reliably monitoring the speed of a moveable coordinate measuring device, a first value of the speed is calculated from measured values of the coordinate measurement system. The measured values contain information on positions of the coordinate measuring device. The measured values are further used to determine the coordinates of a measurement object. A second value of the speed is ascertained from measurement signals of at least one additional movement sensor. The measurement signals can also be used for controlling a drive device of the coordinate measuring device. A fault signal can be generated if the first value and/or the second value deviate from one another, from a predetermined value and/or a limit value according to a predefined criterion.

Abstract: An indicating instrument includes a step motor having a field winding, a pointer, a reduction gear mechanism having gears, a stopper device for stopping the pointer at a stopper position, a detecting device for detecting induced voltage of the winding at each of detecting points that include a zero point corresponding to the stopper position, a control device for controlling a drive signal, and an updating device for updating the zero point based on the induced voltage during zero-reset control performed by the control device. The control device performs return control, whereby the pointer rotates to a return point in an indication value increasing direction and then returns to a waiting point in a zero-reset direction to stand by at the waiting point, prior to zero-reset control, whereby the pointer rotates from the waiting point in the zero-reset direction.

Abstract: A vehicle includes a GPS system and a longitudinal accelerometer. Accelerometer corrections are derived based on GPS velocity data. Individual wheel speeds are determined based on GPS velocity data. Longitudinal vehicle velocity may be determined based on accelerometer data or individual wheel speeds.

Abstract: Compensating for the misalignment of a navigation device with respect to a vehicle is described. In one example, the compensation is made by applying a high pass filter to a measured acceleration of the vehicle to produce a motion acceleration signal, weighting the motion acceleration signal with a measured steering rate of the vehicle, and deriving misalignment parameters for the navigation device with respect to the vehicle using the weighted motion acceleration signal.

Abstract: A safety system for vehicle occupants includes a control unit and sensors situated remotely from the control unit and connected via conductors to the control unit. The safety system encompasses means for testing the sensors and the conductors to the sensors.

Abstract: A pointer measuring instrument capable of indicating “zero” on an indication panel by a pointer even if a play (backlash) is present in gears. The measuring instrument comprises a pointer reference position setting means (7a, 7b) for determining the reference position of the pointer (4). A control means (6) rotates the pointer (4) in the direction toward the reference position when a power supply to a stepping motor (2) is turned on, and performs a first drive for stopping the rotation of the pointer (4) when it receives a pointer reference position arrival signal from the pointer reference position setting means (7a). Then, the control means performs a second drive for moving the pointer (4) by a first angle from the reference position in the reverse direction away from the reference position, and performs a third drive for rotating the gear (3S) of a reduction mechanism (3) on the stepping motor (2) side by a second angle.

Abstract: A system, computer program product and method of obtaining a performance parameter associated with a sensor, such as an accelerometer, is provided. The method includes applying an acceleration to the accelerometer and a first frequency to obtain a sensitivity of the accelerometer at the first frequency. A first self-test is performed on the accelerometer. The first self-test includes stimulating the accelerometer with a first self-test stimulation signal encoded with the first frequency, such that the accelerometer outputs a first signal. A self-test equivalent acceleration is then determined based, at least in part, on the first signal and the accelerometer sensitivity at the first frequency. A second self-test is performed on the accelerometer. The second self-test includes stimulating the accelerometer with a second self-test stimulation signal encoded with the second frequency, such that the accelerometer outputs a second signal.

Abstract: A transducer test system for testing accelerometers or velocity transducers includes a signal conditioner and a shaker that can be used in a field environment, for example by an avionics technician at an aircraft. A test transducer and a reference transducer, which is a known-good version of the test transducer, are mounted onto the shaker and electrically connected to the signal conditioner. The technician shakes the two transducers simultaneously by manually shaking the shaker. The signal conditioner receives and compares the signals output from the test and reference transducer in order to determine the operating condition of the test transducer.

Abstract: An angular velocity detection apparatus includes: a sensor unit having first and second detection axes serving as angular velocity detection axes, the first and second detection axes intersecting each other; a sensor output correction circuit for making at least one of an offset adjustment and a sensitivity adjustment to a detection output of an angular velocity around the first detection axis and a detection output of an angular velocity around the second detection axis; a sign determination circuit for obtaining a sign of a rotational direction of an angular velocity on any one of the first and second detection axes; and an amplitude calculation circuit for multiplying a square sum average of detection outputs of angular velocities around the first and second detection axes outputted by the sensor output correction circuit and a sign outputted by the sign determination circuit.

Abstract: The present invention relates to a traveling direction measuring apparatus usable as a pedestrian navigation system in locations where it is difficult to obtain high positioning accuracy such as inside buildings or around multistory buildings where a GPS cannot be used. An acceleration detecting section (1) detects 3-axes acceleration of the traveling direction measuring apparatus, which varies with the walking of the pedestrian. An acceleration data acquiring section (2) obtains 3-axes acceleration data repeatedly by the number of prescribed times or more, said 3-axes acceleration data varies with the walking of the pedestrian. A first gravity acceleration calculating section (3) calculates, when the pedestrian is walking with holding the traveling direction measuring apparatus in a generally fixed attitude, gravity acceleration by averaging acceleration data sets during several steps obtained by the acceleration data acquiring section (2).

Abstract: In order to determine a signal offset (OFS_SIG) of a roll rate sensor in a vehicle (10), a roll rate sensor signal (OMEGA_ROLL_SIG) is detected. A transversal acceleration (AC) of the vehicle (10) is determined. A temporal derivative (DRV_AC) of the transversal acceleration (AC) is determined. Verification is made as to whether a value of the temporal derivative (DRV_AC) of the transversal acceleration (AC) is smaller than a predefined first threshold value (THD—1). The signal offset (OFS_SIG) of the roll rate sensor is determined in accordance with the roll rate sensor signal (OMEGA_ROLL_SIG) if the value of the temporal derivative (DRV_AC) of the transversal acceleration (AC) is smaller than the predefined first threshold value (THD—1).

Abstract: A control component of an apparatus in one example is configured to signal a plurality of electrodes arranged in at least first, second, third, and fourth radial electrode groups along first, second, third, and fourth axes at approximately 0, 45, 90, and 135 degrees, respectively, around the planar resonator. During a first time period, the control component is configured to signal: the first radial electrode group to induce a drive oscillation in the planar resonator, the third radial electrode group to sense the drive oscillation, the second radial electrode group to sense a Coriolis force induced oscillation, and the fourth radial electrode group to null the Coriolis force induced oscillation.

Abstract: A method of navigation includes providing an angular rate sensor and a direction-of-gravity reference. The method also includes determining bias error of the angular rate sensor about a vertical axis based on data substantially from the angular rate sensor and from the direction-of-gravity reference. In one embodiment, the first angular rate sensor is moved from a first position around a substantially horizontal axis to a second position around the substantially horizontal axis. The first angular rate sensor provides angular rate data for attitude at the first position and for compass heading at the second position. Data from the first angular rate sensor and from the direction-of-gravity reference is processed with a program for determining a bias error correction for the first angular rate sensor while the first angular rate sensor is in the first position.

Abstract: A calibration method is provided for a motion sensor, in particular a pedometer, a first acceleration signal being measured as a function of an acceleration parallel to a first direction in a first calibration step, a second acceleration signal being measured as a function of an acceleration parallel to a second direction in a second calibration step, and an acceleration vector being ascertained from the angle between the first and the second acceleration signal in a third calibration step, and a phase angle between the acceleration vector and the first direction being determined in a fourth calibration step for determining a calibration signal.

Abstract: A short duration test activation signal is applied to the test activation port of a motion sensor module and the test activation status port observed with an error flag being set if a corresponding signal does not appear at the test activation status port within a predetermined time period.

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 method for manufacturing an acceleration sensing unit includes: providing an element support substrate in which a plurality of element supporting members is arranged so as to form a plane, each of the element supporting members being coupled to the other element supporting member through a supporting part and having a fixed part and a movable part that is supported by the fixed part through a beam, the beam having a flexibility with which the movable part is displaced along an acceleration detection axis direction when an acceleration is applied to the movable part; providing an stress sensing element substrate in which a plurality of stress sensing elements is arranged so as to form a plane, each of the stress sensing elements being coupled to the other stress sensing element through an element supporting part and having a stress sensing part and fixed ends that are formed so as to have a single body with the stress sensing part at both ends of the stress sensing part; disposing the stress sensing element

Abstract: A method of processing signals from an accelerometer/gyroscopic-based input device includes providing the input device within a vehicle. An accelerometer/gyroscopic-based second device is also provided within the vehicle. The input device is manually actuated while the vehicle is in motion. First signals are transmitted from the input device in response to the manually actuating step. Second signals are transmitted from the second device in response to the motion of the vehicle. The first signals are adjusted dependent upon the second signals.

Abstract: An angular velocity correction device includes a horizontal angular velocity detection unit to detect horizontal axis angular velocity, that is mounted on a main unit attached to a moving object that moves along a predetermined movement surface, and that is made up of angular velocity around the horizontal axis which is orthogonal to the advancing direction of the moving object, occurring according to the inclination angle of the movement surface; a correction value generating unit to generate a correction value for correcting the horizontal axis angular velocity, based on the horizontal axis angular velocity that satisfies predetermined horizontal determining conditions of the horizontal axis angular velocity in the past; and a correction unit to correct the horizontal axis angular velocity using the correction value.

Abstract: A method and system for testing and calibrating an accelerometer of an electronic device are provided. In accordance with one embodiment, there is method of testing and calibrating an accelerometer of an electronic device, comprising: levelling a test fixture; placing the electronic device in a nest of the test fixture; detecting the electronic device within the nest; 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: The apparatus in one embodiment may have capacitive bulk acoustic wave disk gyro operated in a closed loop mode. A self-calibration system may be operatively coupled to the capacitive bulk acoustic wave disk gyroscope. Self-calibration of gyro bias of the gyro may be implemented by interchanging an anti-nodal axis with a nodal axis of the gyro.