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7386395 Systems and methods for shock compensation utilizing an adaptive control technique algorithm  
A method for providing dynamic disturbance compensation to an inertial system is described. The method includes determining estimated correction factors based on received acceleration components,...
7353112 Input system based on a three-dimensional inertial navigation system and trajectory estimation method thereof  
An input system based on a three-dimensional inertial navigation system and a trajectory estimation method thereof is disclosed. The input system based on the three-dimensional inertial navigation...
7350394 Zero-g offset identification of an accelerometer employed in a hard disk drive  
A method is provided for identifying offsets of accelerometers integrated into hard disk drives. More specifically, often, disk drives employ accelerometers that constantly monitor the acceleration...
7337668 Accelerometer in closed loop with error detection  
An accelerometric measurement device with a return loop including accelerometer, a corrector generating a signal for correction of the position of the accelerometer, a closed return loop to apply...
7337650 System and method for aligning sensors on a vehicle  
A vehicle sensor system consisting of video, radar, ultrasonic or laser sensors, oriented to obtain a 360 degree view around the vehicle for the purpose of developing a situation or scene...
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...
7318337 Method and apparatus for measuring frequency characteristics of acceleration sensor  
A metal rod guide ( 30 ) supports a metal rod ( 1 ) that can be inclined at an arbitrary angle, the support is instantaneously released to produce a free fall state, and during the release period,...
7305863 Impact sensor and method for testing the same  
An impact sensor, or a method for testing the impact sensor. The impact sensor has a sensor element and a filter for filtering the signals of the sensor element. This filter is preferably a...
7281522 Acceleration sensor status detecting apparatus  
An acceleration sensor state detecting apparatus for detecting a state of an acceleration sensor provided at a vibrating body includes a calculating method for calculating a difference between...
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...
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...
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...
7237169 Cross-monitoring sensor system and method  
Cross-monitoring sensor system and method in which a plurality of sensors each having a sensing element, circuitry for processing signals from the sensing element, an output interface for...
7231802 Apparatus for detecting a physical quantity acting as an external force and method for testing and manufacturing the apparatus  
A sensor comprises a semiconductor pellet ( 10 ) including a working portion ( 11 ) adapted to undergo action of a force, a fixed portion ( 13 ) fixed on the sensor body, and a flexible portion (...
7188523 Vibrating mass gyroscope and method for minimizing bias errors therein  
An exemplary vibrating mass gyroscope uses a mass disposed for movement along an x-axis and y-axis. First and second electrodes are disposed adjacent surfaces of the mass along an x-axis and...
7162911 Semiconductor acceleration sensor and method of testing the same  
Electrical characteristics of a semiconductor acceleration sensor containing a switched capacitor filter ( 15 ) are tested while the semiconductor acceleration sensor ( 1, 30, 50, 70, 90 ) is...
7134338 Sensor with symmetrical limiting of a signal  
A sensor having a seismic mass and having an arrangement for detecting the deflection of the mass and converting it into an electrical signal; in at least one operating mode of the sensor, a...
7131315 Methods and apparatus for reducing vibration rectification errors in closed-loop accelerometers  
Systems and methods for minimizing vibration rectification error (VRE) for a closed-loop accelerometer. In one embodiment, the method includes applying a known vibration signal to the closed-loop...
7117714 Output amplifier circuit and sensor device using the same  
A device which includes an acceleration sensor for outputting small differential voltages VIP and VIN using resistance changes, and an output amplifier for amplifying the voltage difference. The...
7109727 Capacitive physical quantity sensor  
In a capacitive physical quantity sensor, a C-V converter converts a variation in a capacitance between a movable electrode and a fixed electrode into a voltage to output the converted voltage in a...
7093478 Method for calibrating accelerometer sensitivity  
A method for calibrating the sensitivity of a micromachined differential-capacitor accelerometer without applying mechanical stimulation, such as shaking. The accelerometer is fabricated with...
7086270 Method for continuous sensor self-test  
A method and device for self-test of a sensor. The method includes stimulating the sensor with signals that generate sensor outputs at a frequency that differs from the frequency of expected sensed...
7082830 Physical quantity sensor capable of outputting time-serial signal indicative of plural ranges of physical quantity  
A physical quantity sensor detecting physical quantity, such as acceleration or angular velocity, is provided and mounted on, for example, a vehicle. The sensor has a physical quantity transducer...
7066004 Inertial measurement unit using rotatable MEMS sensors  
A MEM inertial sensor (e.g. accelerometer, gyroscope) having integral rotational means for providing static and dynamic bias compensation is disclosed. A bias compensated MEM inertial sensor is...
7042228 Transducer in-situ testing apparatus and method  
The present invention is directed to an apparatus and method for a measurement system for the testing of transducers, and more particularly to the testing of piezoelectric transducers. The...
6997034 Method and apparatus for inspecting knocking detector  
When a knocking detector mounted on a cylinder block of an engine is inspected, the cylinder block is vibrated by a vibrating unit via a housing connected to the cylinder block, and the performance...
6988409 Dynamic quantity sensor  
A sensor element includes a pair of differential capacitors having capacitances C 1 and C 2 causing a complementary capacitance change in response to an applied acceleration. An additional...
6968281 Method for calibrating an inertial measurement unit  
A method for testing inertial measurement devices on a multi-axis rate table without having to utilize slip rings to transfer signals between the inertial measurement devices and remote processors...
6964188 Method and device for determining the offset value of a longitudinal acceleration sensor  
A method and device for determining the offset value of a longitudinal acceleration sensor, a first inclination variable representing the road surface inclination being determined from the...
6952966 Apparatus for detecting physical quantity  
An apparatus is provided for concurrently detecting a plurality of physical quantities to be detected. The apparatus comprises plural sensing units, plural processors, and controller. The sensing...
6918282 Self-test circuit and method for testing a microsensor  
A test circuit and method provide testing of a capacitive type microsensor. The method includes applying a first signal having a first voltage potential to an input of a microsensor during a...
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....
6856883 Solid-state accelerometer module and system therefor  
A solid-state accelerometer module adapted to control the operation of the taillights in a motor vehicle for warning the driver of the trailing motor vehicle of a deceleration of the lead vehicle....
6796180 Angular velocity sensor  
An improved vibration type angular velocity sensor suppresses temperature variation of the sensitivity in the atmosphere. When the vibrator 31 is subjected to an angular velocity Ω while it is in...
6792792 Diagnostic test for a resonant micro electro mechanical system  
A balanced resonant micro electromechanical system angular rate sensor includes a feedback control loop that generates a null signal to rebalance the sense element to cancel any a Coriolis force...
6778924 Self-calibrating inertial measurement system method and apparatus  
A system for testing inertial measurement devices on a multi-axis rate table without having to utilize slip rings to transfer signals between the inertial measurement devices and remote processors...
6758080 Calibration of sensors  
A plurality of seismic sensors calibration method ( 100 ) includes: an assembling so that sensors are coupled with each sensor positioned with its axis of sensitivity in a different spatial...
6738721 Method for improving the measurement values of an inertial measurement system  
Inertial measurement systems for measuring accelerations and angular speeds are currently widely used in vehicles where they serve as sensors for safety devices and navigation systems. The required...
6729176 Calibration of orthogonal sensor suite  
A method for calibrating an orthogonal sensor suite includes the steps of imparting on the sensor suite a series of known accelerations at orientations known relative to each other, while recording...
6698269 Transducer in-situ testing apparatus and method  
The present invention provides an apparatus and method for in-situ testing of transducers, and more particularly to the testing of piezoelectric transducers including piezoelectric accelerometers....
6670888 Method of detecting improper mounting of acceleration sensors on a vehicle  
A method of detecting the improper mounting of a sensor on a motor vehicle includes monitoring the output signals of the sensor, determining the noise levels in the output signals, and comparing...
6668614 Capacitive type physical quantity detecting sensor for detecting physical quantity along plural axes  
A control signal generator transmits a first signal to a movable electrode and a fixed electrode to detect a change in a capacitance formed between the movable electrode and the fixed electrode...
6658935 Complemented absolute/relative full-tensor gravity gradiometer system  
A complemented absolute/relative full-tensor gravity gradiometer system utilizes an absolute gravity instrument and a relative gravity gradiometer to provide respective outputs corresponding to...
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...
6634207 Accelerometer compensation in an inertial navigation system  
The invention is a method and apparatus for improving the accuracy of an inertial navigation system. The method comprises (1) obtaining a measure of the angular velocity of a body frame of...
6629448 In-situ testing of a MEMS accelerometer in a disc storage system  
A disc storage system performing an in-situ test on a MEMS accelerometer, in a disc drive. The circuit includes a control circuit that establishes a desired self test condition conducive to the...
6601431 Acceleration sensor  
An acceleration sensor which can improve precision during self-diagnosis operation. The acceleration sensor includes an amplifier circuit which amplifies a detection signal obtained by converting...
6564637 Sensor having a resonance structure, especially an acceleration or rotation rate sensor, and a device for carrying out a self-test  
A self-testing sensor (especially to measure an angular rate or acceleration) includes a resonant structure, an actor unit configured to excite the structure to a first periodic vibration, a...
6516651 Coriolis effect transducer  
A method for testing a Coriolis transducer having a mass adapted vibrate along a vibratory direction in a resonant structure and undergo a displacement along a sensitive axis, perpendicular to the...
6497146 Inertial rate sensor and method with built-in testing  
Inertial rate sensor and method in which in which a single output terminal is utilized for delivering a rate output signal during normal operation, interfacing with an external computer during a...
Matches 1 - 50 out of 154 1 2 3 4 >