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| Number | Title | Issue Date |
| 8156783 | Error-correction method and error-correction device for an acceleration sensor An error-correction method for an acceleration sensor having a plurality of electrodes and a seismic mass. The error-correction method which makes it possible to correct systematic errors at low expense includes the following steps: applying a voltage in order to de... | 04/17/2012 |
| 8136383 | Calibrating an accelerometer To calibrate an accelerometer, a seismic cable that carries the accelerometer is rotated. Data measured by the accelerometer as the seismic cable is rotated is received, and at least one calibration parameter according to the received data is computed. The at least ... | 03/20/2012 |
| 8117888 | Method and apparatus of improving accuracy of accelerometer A method and apparatus for calibrating or adjusting an accelerometer, wherein the accelerometer is held stationary to obtain the signal outputs from the accelerometer, representing component vectors making up the composite vector of 1 g. Thus, gain or sensitivity, a... | 02/21/2012 |
| 7980115 | Self-calibrating laser semiconductor accelerometer A self-calibrating laser accelerometer system that continuously removes bias errors from acceleration measurements under dynamic operating conditions has a frame with a pair of essentially identical mass modulated accelerometers positioned within the frame. Each acc... | 07/19/2011 |
| 7810370 | Accelerometer calibrator resonance damper and methods A calibrator includes a moving element having a structural member having a mounting feature for mounting the device to be calibrated. The moving element includes first and second coils at first and second ends. A fixed element supports the moving element and include... | 10/12/2010 |
| 7748250 | Three-axial acceleration sensor inspection device and method of inspecting three-axial acceleration sensor A three-axial acceleration sensor inspection device is provided for inspecting a three-axial acceleration sensor that detects acceleration components in three axes crossing perpendicularly with each other and outputs acceleration component signals. The three-axial a... | 07/06/2010 |
| 7707867 | Method for correction of inertial sensor mounting offsets A method for calibration of motion sensors included in a vehicle electronic brake control system includes measuring sensor offset errors at different points in the assembly of the system and the vehicle and then combining the offset errors to obtain net offset error... | 05/04/2010 |
| 7661291 | Accuracy enhancement of a sensor during an anomalous event A method for enhancing the accuracy of a sensor is provided. The method includes determining a measure of the output of the sensor, determining whether the measure falls outside of an acceptable range for the output of the sensor, and, when the measure falls outside... | 02/16/2010 |
| 7644602 | Method of measuring transverse sensitivity of sensor for detecting acceleration and acceleration measuring method A sensor obtains transverse sensitivity in a sensitivity matrix of an acceleration sensor with a uniaxial vibration generator. The acceleration is measured by vibrating the table 12. As the measurement of the main axis sensitivity, transverse sensitivity S | 01/12/2010 |
| 7640786 | Self-calibrating accelerometer The method and apparatus in one embodiment may have: a sensing element for an accelerometer having a bias, the sensing element having a rectangular plate supported by flexures which allow rotation about a transverse center line thereof; a center of mass (CG) of the ... | 01/05/2010 |
| 7578162 | Apparatus for detecting a physical quantity acting as an external force and method for testing and manufacturing this 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 (13) having flexibility formed therebetween, a wor... | 08/25/2009 |
| 7555929 | Micromechanical sensor having fault identification A sensor includes a micromechanical functional part and an electronic evaluation circuit which are in electrical connection to each other using electrical conductors. An arrangement for carrying out an auto-test of the sensor is provided in such a way that fault ide... | 07/07/2009 |
| 7467536 | Positioning system for single or multi-axis sensitive instrument calibration and calibration system for use therewith A positioning and calibration system are provided for use in calibrating a single or multi axis sensitive instrument, such as an inclinometer. The positioning system includes a positioner that defines six planes of tangential contact. A mounting region within the si... | 12/23/2008 |
| 7451633 | Apparatus and method for correcting inertial sensor and recording medium recording the method An apparatus for correcting an inertial sensor includes an inertial sensor module, a storage module and a control module. The inertial sensor module measures angular velocity and acceleration of an object moving in a space. The storage module stores predetermined op... | 11/18/2008 |
| 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 |
| 7392685 | Accelerometer having adjustable damping An apparatus and method for an accelerometer mechanism having a proof mass that is suspended for out-of-plane motion between first and second damping plates, wherein at least one of the first and second damping plates is movable between first and second positions re... | 07/01/2008 |
| 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, and dynamically determining filter coefficients for a filter configure... | 06/10/2008 |
| 7363814 | Multi-axial angular velocity sensor An angular velocity sensor for detecting angular velocity about a Z-axis in an XYZ coordinate system has a substrate oscillator, a flexible member for connecting the oscillator to a casing, a device for oscillating the oscillator in an X-axis direction, and a detect... | 04/29/2008 |
| 7360455 | Force detector and acceleration detector and method of manufacturing the same An electrode layer is formed on the upper surface of a first substrate, and a processing for partially removing the substrate is carried out in order to allow the substrate to have flexibility. To the lower surface of the first substrate, a second substrate is conne... | 04/22/2008 |
| 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 system according to the present invention has acceleration sensors fo... | 04/01/2008 |
| 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 felt by the disk drive. Once the accelerations are less than a prede... | 04/01/2008 |
| 7347093 | Angular velocity sensor and automobile using the same The invention provides an angular velocity sensor which is provided with a smoothing circuit having a large smoothing time constant so that it can be reduced in size and integrated into an IC. Smoothing circuit (9) is provided with first switch (11), f... | 03/25/2008 |
| 7340956 | Built-in self test of MEMS The present disclosure is directed to an apparatus and method for producing and comparing signals from various points in a MEMS device. By producing signals which should be of substantial identical characteristics, deviations from the situation where the signals are... | 03/11/2008 |
| 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 this correction signal to the accelerometer, a detector to detect an e... | 03/04/2008 |
| 7337669 | Inertial sensor and combined sensor therewith An inertial sensor is provided which includes a self-diagnosis circuit which applies an AC-bias signal voltage ahead of a synchronous demodulator, and thereby, supplies a diagnostic signal for detecting an abnormality in at least one of a detecting element and a det... | 03/04/2008 |
| 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 awareness. The sensors may or may not have overlapping field of views, or supp... | 03/04/2008 |
| 7322240 | Micromachined comb capacitive accelerometer A comb capacity accelerometer including: a substrate, a first mobile electrode free to move with respect to the substrate provided with a set of mobile fingers, a first fixed electrode fixed with respect to the substrate and provided with a set of fixed fingers, eac... | 01/29/2008 |
| 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 |
| 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, a first end surface (2) of the metal rod is impacted... | 01/15/2008 |
| 7312554 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) senses a parameter of a piezoelectric actuator (14) operating in a device (10) and adjusts a drive signal of the piezoelectric actuator in accordance with the parameter. The drive circuit comprises a controller (100) ... | 12/25/2007 |
| 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 low-pass filter. Using a test signal, the filter is tested, and if there is ... | 12/11/2007 |
| 7290435 | Method and apparatus for electronic cancellation of quadrature error Methods and apparatus are provided for detecting a rate of rotation. In one implementation, the method includes vibrating a proof mass at a pre-determined frequency in a drive axis. In response to a rotation, sensing an amount of deflection of the proof mass in an a... | 11/06/2007 |
| 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 measured results of the acceleration sensor obtained per first predetermi... | 10/16/2007 |
| 7271595 | Sensor detection apparatus and sensor Provided are two monitor circuits for monitoring two input signals of an input stage differential amplifier, respectively, and two monitor circuit for monitoring two output signals of the input stage differential amplifier, respectively. When failure occurs at the b... | 09/18/2007 |
| 7263460 | Device and method for measuring accelerations for a passenger protection system in a vehicle Disclosed is a device for measuring accelerations for a vehicle passenger protection system, whereby a first and second acceleration sensor with a first or second sensitivity direction are fitted in relation to a prespecified main direction of measurement, which for... | 08/28/2007 |
| 7254525 | Method and apparatus for automated analysis of hard disk drive performance A method and apparatus is provided which reduces the equipment and time requirements for hard disk drive performance testing during manufacturing. This invention executes self-contained performance testing code that resides within the drive's manufacturing firmware,... | 08/07/2007 |
| 7253079 | Coplanar mounting member for a MEM sensor A coplanar mounting member for a MEM sensor includes a first surface coplanar with a connection pad on the surface of a MEM sensor board containing the MEM sensor control circuit; a second surface inclined to the surface of the board for mounting a MEM sensor and an... | 08/07/2007 |
| 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 |
| 7246513 | Lateral calibration device and method A calibration device and method for lateral force calibration in small force measuring devices such as atomic force microscopes is disclosed. A platform has a substantially planar surface including a slot for accommodating at least part of the AFM cantilever tip, on... | 07/24/2007 |
