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| Number | Title | Issue Date |
| 8146401 | Method and apparatus for in-flight calibration of gyroscope using magnetometer reference The system includes a mobile vessel having a body axis and a steering mechanism. A three-axis gyroscope is mounted within the vessel. A three-axis magnetometer is mounted within the vessel. A programmable device communicates with the three-axis gyroscope, the three-... | 04/03/2012 |
| 8051698 | Micro-electro-mechanical gyroscope with open-loop reading device and control method thereof A micro-electro-mechanical gyroscope includes a first mass, which is able to oscillate along a first axis with respect to a fixed body, an inertial sensor having a second mass constrained to the first mass so as to oscillate along a second axis in response to a rota... | 11/08/2011 |
| 7644604 | Error correction for vibratory rate gyroscope A synchronous signal processing circuit for a dual-axis vibratory rotation-rate sensor uses a hybrid analog/digital design to provide correction for parasitic quadrature errors by the addition of synthesized correction signals in the analog domain prior to digitizat... | 01/12/2010 |
| 7421340 | Method, apparatus and computer program for azimuth determination e.g. for autonomous navigation applications For an observer equipped with a first azimuth data source responsive to a magnetic field to deliver first azimuth data, such as a compass, and with a second azimuth data source delivering second azimuth data and which is independent of magnetic fields, such as a gyr... | 09/02/2008 |
| 7401495 | Activity monitoring An activity monitor is provided that corrects for the effects of motion external to the entity being monitored. For example, the activity monitor can overcome the effects of vehicular travel. ... | 07/22/2008 |
| 7400142 | Dynamic magnetic anomaly compensation An array of three-axis magnetometers used for dynamic magnetic anomaly compensation are located at the corners of a parallelopiped, with pairs of magnetometer outputs used to derive a magnetic anomaly gradient vector used to compensate a compass and/or the output of... | 07/15/2008 |
| 7359776 | Apparatus for correcting and diagnosing angular rate sensors installed in an automotive vehicle An offset diagnosing and correcting section obtains an offset correction value from an angular rate value obtained from detection signals produced from a plurality of angular rate sensors and a detection signal produced from an angular rate sensor when an automotive... | 04/15/2008 |
| 7357025 | Micromachined apparatus with co-linear drive arrays A mass includes a first set of drive fingers interdigitated with a first array of fixed drive fingers and a second set of drive fingers interdigitated with a second array of fixed drive fingers. Each array of fixed drive fingers is affixed to a substrate using a plu... | 04/15/2008 |
| 7347094 | Coupling apparatus for inertial sensors A coupling apparatus allows anti-phase movements of inertial sensor element frames along parallel axes but substantially prevents in-phase movements of the frames. The coupling apparatus includes a bar coupled between first and second sensor element frames and at le... | 03/25/2008 |
| 7320253 | Stress detection method for sensor device with multiple axis sensor and sensor device employing this method The present invention provides the stress detection method for force sensor device with multiple axis sensor device and force sensor device employing this method, whose installation angle is arbitrary. The stress detection method includes, first and second force sen... | 01/22/2008 |
| 7287427 | Rate-of-rotation sensor having frequency adjustment A yaw-rate sensor having a resonant driving frequency and a resonant Coriolis frequency. In addition, the yaw-rate sensor has at least one operating voltage, of which the resonant Coriolis frequency is a function. The resonant Coriolis frequency is adjusted to the r... | 10/30/2007 |
| 7287428 | Inertial sensor with a linear array of sensor elements An inertial sensor includes at least one pair of sensor elements arranged in a linear array. Each sensor element has a frame and a movable mass suspended within the frame. The frames of each pair of sensor elements may be coupled so that the frames are allowed to mo... | 10/30/2007 |
| 7249488 | Method for detecting a zero-point error of a coriolis gyroscope and coriolis gyroscope using said method In a method for determining the zero-point error of a Coriolis gyro, the resonator of the Coriolis gyro has a disturbance force applied to it such that a change in the stimulation oscillation of the resonator is brought about. A change in the read oscillation of the... | 07/31/2007 |
| 7246512 | Method for determining a zero-point error in a vibratory gyroscope A method for determination of the zero error of a Coriolis gyro. Appropriate disturbance forces are applied to the resonator of the Coriolis gyro such that at least one natural oscillation of the resonator is stimulated that differs from the stimulating and read osc... | 07/24/2007 |
| 7240533 | Method for reducing bias error in a vibrating structure gyroscope A method for reducing bias error in a Vibrating Structure Gyroscope having a vibrating structure, a primary drive for putting the vibrating structure into carrier mode resonance, a primary pick-off device for sensing carrier mode motion, a secondary pick-off for sen... | 07/10/2007 |
| 7222513 | Method of compensating anisotropy in a vibrating-bell inertial rotation sensor The method serves to compensates anisotropy in an inertial rotation sensor comprising a metallized vibrating bell (1) having a bias voltage applied thereto, the vibrating bell (1) having an edge (7) electrodes (5.1, 5.2), and the method c... | 05/29/2007 |
| 7219529 | Method and apparatus for measuring scalefactor variation in a vibrating structure gyroscope Apparatus for measuring variation in scalefactor from a predetermined value for a vibrating structure gyroscope has a vibrating structure (R), fixed primary and fixed secondary drives (1, 13) for putting and maintaining the vibrating structure (R) in vibratin... | 05/22/2007 |
| 7216539 | Micromachined apparatus with split vibratory masses Each of a number of resonator masses is split into two separate lobes or masses joined together by a short flexure. The short flexure allows the separate lobes or masses to rotate slightly as they resonate so as to substantially relieve longitudinal stresses in cert... | 05/15/2007 |
| 7216525 | Method for compensation for a zero error in a coriolis gyro A method for compensation of the zero error of a Coriolis gyro. The frequency of the read oscillation is modulated. The output signal from a rotation rate control loop or quadrature control loop for the Coriolis gyro is demodulated in synchronism with the modulation... | 05/15/2007 |
| 7204144 | Micromachined apparatus with drive/sensing fingers in coupling levers Resonator structures include a plurality of resonator masses interconnected by a plurality of levers so as to resonate in anti-phase with one another. The levers include a plurality of lever fingers interdigitated with corresponding fixed fingers affixed to an under... | 04/17/2007 |
| 7196643 | Resolver arrangement A resolver arrangement that is inexpensive and yet offers high resolution and high noise rejection includes a carrier signal generator and two processing channels each of which has an analog input connected a different one of the stator coils and a channel output. E... | 03/27/2007 |
| 7191636 | Inertial measurement system and method with sensor bias cancellation Inertial measurement system and method in which a base is rotated about an input axis in accordance with a rotation to be measured, rotation about the input axis is sensed with one or more angular rate sensors, fixed bias offset is cancelled by dithering the sensors... | 03/20/2007 |
| 7188522 | Method for aligning a rotation rate sensor The invention relates to a method for aligning a rotation rate sensor with a vibration gyroscope, the first input and the first output of which is part of a primary control circuit. Said control circuit excites the vibration gyroscope to vibrate at its natural frequ... | 03/13/2007 |
| 7159441 | Cloverleaf microgyroscope with electrostatic alignment and tuning A micro-gyroscope (10) having closed loop output operation by a control voltage (Vty), that is demodulated by a drive axis (x-axis) signal Vthx of the sense electrodes (S1, S2), providing Coriolis torque rebalance to preven... | 01/09/2007 |
| 7127932 | Method for monitoring a rotational speed sensor In a method for monitoring a rotation rate sensor with a vibrational gyroscope which has a first input and a first output which form part of a primary control loop which excites the vibrational gyroscope by supplying an excitation signal to the first input at its na... | 10/31/2006 |
| 7089792 | Micromachined apparatus utilizing box suspensions A micromachined gyroscope makes use of Coriolis acceleration to detect and measure rotation rate about a plane normal to the surface of a substrate. Specifically, various resonating structures are suspended within a frame. The resonating structures include phase and... | 08/15/2006 |
| 7032451 | Micromachined sensor with quadrature suppression Quadrature suppression is provided by placing a resonator mass adjacent to a quadrature suppression electrode. The resonator mass is capable of moving substantially parallel to the quadrature suppression electrode and includes a notch formed adjacent to a portion of... | 04/25/2006 |
| 6912901 | Angular velocity sensor The present invention aims to present an angular velocity sensor having a self diagnosis function. An angular velocity sensor of the present invention includes a driving part for stably vibrating a driving part of a sensor element having a driver part and a d... | 07/05/2005 |
| 6915215 | Integrated low power digital gyro control electronics Embodiments of the invention generally encompass a digital, application specific integrated circuit (ASIC) has been designed to perform excitation of a selected mode within a vibratory rate gyroscope, damping, or “force-rebalance,” of other modes within the sens... | 07/05/2005 |
| 6906514 | Concept for compensating the influences of external disturbing quantities on physical functional parameters of integrated circuits A circuit for generating an output signal, which depends on a physical useful quantity includes means for detecting the physical useful quantity, wherein the means for detecting is arranged to generate an output signal, which depends on the physical useful quantity,... | 06/14/2005 |
| 6883361 | Quadrature compensation technique for vibrating gyroscopes Quadrature error occurs in vibrating gyroscopes because of manufacturing flaws that permit the sensing element (proof mass) to oscillate about an axis that is not orthogonal to the output axis. This creates an oscillation about the output axis that has a component o... | 04/26/2005 |
| 6732586 | Angular velocity sensor The present invention presents an angular velocity sensor having a self diagnosis function. An angular velocity sensor of the present invention includes a driving part for stably vibrating a driving part of a sensor element having a driver part and a detector part f... | 05/11/2004 |
| 6698287 | Microgyro tuning using focused ion beams The present invention discloses methods of manufacturing mechanical resonator microgyroscopes using focused ion beam machining and the mechanical resonator gyroscopes produced therefrom. An exemplary method of tuning a mechanical resonator gyroscope, incl... | 03/02/2004 |
| 6691550 | Estimator for determining resonant frequency and Q The resonant frequency of a device is determined by energizing the device with a short burst of energy to produce a decaying sinusoidal output, determining coefficients of a linear difference equation characterizing the decaying sinusoidal output by use o... | 02/17/2004 |
| 6675630 | Microgyroscope with electronic alignment and tuning A micro-gyroscope having electronic alignment by performing an electronic coordinate transformation on control voltages (VTX, VTy) through an attenuator network thereby canceling first and second harmonic signals from the output (V | 01/13/2004 |
| 6666090 | Vibrating gyroscope and electronic device using the same A vibrating gyroscope includes a vibrator having a driving electrode and a sensor electrode, a driving circuit for applying a driving voltage to the driving electrode, a detection circuit which receives, from the sensor electrode, a signal corresponding t... | 12/23/2003 |
| 6640610 | Automatic integrated mechanical and electrical angular motion detector test system An automatic integrated mechanical and electrical angular motion detector test system includes a test fixture for holding an angular motion detector to be mechanically and electrically tested; a handler subsystem for feeding an angular motion detector to ... | 11/04/2003 |
| 6598455 | Non-inertial calibration of vibratory gyroscopes The electrostatic elements already present in a vibratory gyroscope are used to simulate the Coriolis forces. An artificial electrostatic rotation signal is added to the closed-loop force rebalance system. Because the Coriolis force is at the same frequen... | 07/29/2003 |
| 6588274 | Self-diagnosing circuit for vibrating gyroscope A self-diagnosing circuit for a vibrating gyroscope for detecting a vibration due to a Coriolis force including a differential operating circuit for determining a difference between output signals outputted from a plurality of detecting electrodes which p... | 07/08/2003 |
| 6418790 | Angular velocity sensor An angular velocity sensor includes first exciters providing a vibrator with drive vibration, a piezoelectric element having a vibration detector for detecting vibration level of the vibrator, and Coriolis detectors for detecting Coriolis vibration depend... | 07/16/2002 |
