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| Number | Title | Issue Date |
| 8155909 | Method and device for checking the plausibility of measured values in a motor vehicle environment A method, a device and a computer program product, by means of which sensor values of redundant sensors in vehicles can be compared with each other to carry out a plausibility check, the measured values of said sensors not being synchronized with each other, are des... | 04/10/2012 |
| 8108171 | Systems and methods for calibration of gyroscopes and a magnetic compass Calibration systems and methods simultaneously calibrate a magnetic compass and gyroscopes. An exemplary embodiment rotates the field calibration system. Based upon the rotation sensed by the magnetic compass and the gyroscopes, the field calibration system determin... | 01/31/2012 |
| 8103472 | Method and apparatus for compensating for position slip in interface devices Method and apparatus for compensating for position slip in interface devices that may occur between a manipulandum and a sensor of the device due to a mechanical transmission. A device position delta is determined from a sensed position of a manipulandum of an inter... | 01/24/2012 |
| 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 |
| 7353614 | Vehicle compass system with continuous automatic calibration The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One suc... | 04/08/2008 |
| 7275008 | Calibration of 3D field sensors An apparatus-based method is disclosed for calibration of a 3D field sensor. The method includes accessing a plurality of samples, where the samples are from the 3D field sensor. Each sample represents a magnitude and an orientation of a three-dimensional field sens... | 09/25/2007 |
| 7254503 | Light source wavelength correction A wavelength correction function provides corrected reflectance values from actual reflectance values taken in a reflectance-base instrument. The correction is provided as a function of measured reflectance values and a predefined set of high resolution reflectance ... | 08/07/2007 |
| 7233873 | Rotor position detection in an electrical machine An electrical machine has a rotor position transducer which provides output signals to a control system. The output signals contain errors due to component shortcomings and manufacturing imperfections. A method is disclosed which is able to determine the errors in t... | 06/19/2007 |
| 7225551 | Electronic compass and method for tracking vehicle rotation An example method for controlling an electronic compass includes determining compass tracking angles in a coordinate system for magnetic field data points that correspond to magnetic field sensor signals produced as a vehicle rotates relative to a surrounding magnet... | 06/05/2007 |
| 7167810 | Analytical estimation of performance of a sensor system The invention relates to a method for an analysis tool for analysis of the sensor performance of a system of sensors, which method comprises analytical calculation of a sensor system's measurement characteristics at each point in a given geographical area. The metho... | 01/23/2007 |
| 7155836 | Method and apparatus for using magnetic field Provided a method and apparatus for using a magnetic field. The method includes: measuring and storing magnetic field data indicating magnitudes of a magnetic field in different directions at each time by rotating sensors over a space; and checking whether a disturb... | 01/02/2007 |
| 7131344 | Device and method for inspecting inside of underground pipe line and method of inspecting concrete on inside of underground pipe line for deterioration A device for inspecting the inside of an underground pipe line which makes it possible to search for cavities on the outside of the underground pipe over the entire internal peripheral surface of the underground pipe, that is, not only upward of the underground pipe... | 11/07/2006 |
| 7117111 | Adjusting method of a tilt meter The present invention provides an adjusting method of a tilt meter. First, multiple holding signals of the same direction output from a tilt sensor, respectively, are differentiated to obtain at least a tilt signal. Then, a first judging step is performed to determi... | 10/03/2006 |
| 7099796 | Multi-sensor information fusion technique The invention is a method and system for aggregating quantitative data and qualitative information from a plurality of sensors, each sensor having a plurality of associated sensor uncertainties, to determine the most likely position of an object and an associated pr... | 08/29/2006 |
| 7077001 | Measurement of coupled aerodynamic stability and damping derivatives in a wind tunnel An apparatus for measuring coupled aerodynamic stability and damping derivatives of an object, such as a missile, towed decoy, etc. in a wind tunnel. The object is mounted on a bearing in the wind tunnel and contains an instrumentation package which provides a plura... | 07/18/2006 |
| 6931339 | Compass and communication system A system and method indicate azimuth of a diver to a remote console. A compass sensor module on a headgear worn by the diver has a two-axis gimbal mechanism provided with a protective housing around ring and two orthogonal axis structures. A magnetic field sensor un... | 08/16/2005 |
| 6922647 | Device and method for automatically detecting a calibration termination for a geomagnetic sensor A device for automatically detecting a calibration termination of a geomagnetic sensor includes a detection unit for detecting signals X and Y outputted from X-axis and Y-axis coils of the geomagnetic sensor, respectively, a calculation unit for calculating slopes d... | 07/26/2005 |
| 6922460 | Explosives detection system using computed tomography (CT) and quadrupole resonance (QR) sensors An explosives detection system which includes computed tomography (CT) and quadrupole resonance (QR) sensors for identifying particular explosive compounds present in passenger baggage. The CT sensor may be configured to automatically identify the presence or absenc... | 07/26/2005 |
| 6868360 | Small head-mounted compass system with optical display A system and method indicate the direction faced by an operator. A waterproof housing has a mounting mechanism to engage a part of a headgear worn by an operator to position the housing in a portion of the operator's forward field of view. A two-axis gimbal mechanis... | 03/15/2005 |
| 6850859 | Sensor drift compensation by lot Drift compensation systems and methods are presented for compensating the drift of a sensor within a manufacturing lot. The system comprises a sensor test sample manufactured from a lot of material having substantially similar chemical or metallurgical properties, a... | 02/01/2005 |
| 6763293 | Calibration procedure for a permanently powered relative steering wheel angle sensor with power-loss indication A method is disclosed for determining a steering wheel angle calibration reference value in a vehicle. The vehicle includes a relative steering wheel angle sensor, which is unique in that it receives power directly from the vehicle's battery and interacts with the v... | 07/13/2004 |
| 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 reference having a first axis, a second axis, and a third axis, (2... | 10/21/2003 |
| 6449572 | Method and device for classifying the driving style of a driver in a motor vehicle In a method for classifying the driving style of a driver in a motor vehicle, measured variables indicative of driving style are recorded and driving-style classification figures are determined by a comparison with reference values, parameter settings cor... | 09/10/2002 |
| 6401036 | Heading and position error-correction method and apparatus for vehicle navigation systems The present invention provides methods and devices that enable correction of gyroscope bias and gyroscope bias drift in low-cost, vehicular navigation and positioning systems without using estimates of position and heading, and subsequent correction of he... | 06/04/2002 |
| 6401047 | System using information on a communications bus to eliminate magnetic noise An electronic compass system using information on a communications bus to eliminate magnetic noise which is integrated with an instrument cluster. A vehicle accessory, such as a blower motor, generates a known, consistent, magnetic field of intensity suff... | 06/04/2002 |
| 6253154 | Method and apparatus for navigating with correction of angular speed using azimuth detection sensor An apparatus and method for more accurately determining the position of a moving object by using an azimuth detector distinct from an angular speed detector to correct the gain error and the offset error of the angular speed detector. The position of the ... | 06/26/2001 |
| 6192315 | Dual-calibrated compass An electronic compass system of the present invention includes a sensor for detecting the earth's magnetic field and for providing electrical signals representing the direction of the vehicle, a heading indicator for indicating vehicle headings in respons... | 02/20/2001 |
| 6128585 | Method and apparatus for calibrating a noncontact gauging sensor with respect to an external coordinate system The sensor array is positioned at a vantage point to detect and calibrate its reference frame to the external reference frame demarcated by light-emitting reference indicia. The sensor array encompasses a wide view calibration field and provides data indi... | 10/03/2000 |
| 6047237 | Compass precalibration method A method of installing a compass system includes the steps of mounting the electronic compass in a vehicle, coupling the electronic compass to a power source of the vehicle, downloading precalibration data into the electronic compass after the electronic ... | 04/04/2000 |
| 5908466 | Method of determining a directional change during vehicle navigation, apparatus for carrying out such a method, and vehicle comprising such an apparatus A method of determining a directional change of a vehicle carries out dead-reckoning for which it utilizes sensors provided on two wheels. In order to compensate for differences between the wheels, the method utilizes given parameters in processing the da... | 06/01/1999 |
| 5890099 | Apparatus for measuring a turning rate, particularly of a motor vehicle The apparatus for determining turning rate, particularly of a motor vehicle, includes two sensor systems (1,3), each of which generate at least one output signal depending on the turning rate. The sensor signals from both sensor systems are combined by a ... | 03/30/1999 |
| 5862517 | System for re-registering a sensor during a live event Although sensors are typically registered before the live event, a sensor's location, orientation and/or field of view can be altered during the event. A system for re-registering a sensor during a live event allows for the determination that a sensor is ... | 01/19/1999 |
| 5850625 | Sensor fusion apparatus and method The invented apparatus fuses two or more sensor signals to generate a fused signal with an improved confidence of target existence and position. The invented apparatus includes gain, control and fusion units, and can also include an integration unit. The ... | 12/15/1998 |
| 5828980 | Coning compensation in strapdown inertial navigation systems The invention is a method for compensating for coning in a strapdown inertial navigation system which utilizes groups of five successive incremental angles of rotation of a body-fixed coordinate system as measured by orthogonally-mounted gyros at regular ... | 10/27/1998 |
| 5828984 | Data processing method for an electronic compass system A method for converting distorted compass data values into corrected data values which employs linear transforms. A linear transform is formulated and programmed into the read only memory of the microcomputer of the electronic compass system. The microcom... | 10/27/1998 |
| 5748505 | Method and apparatus for calibrating a noncontact gauging sensor with respect to an external coordinate system The sensor array is positioned at a vantage point to detect and calibrate its reference frame to the external reference frame demarcated by light-emitting reference indicia. The sensor array encompasses a wide view calibration field and provides data indi... | 05/05/1998 |
| 5487009 | Method for determining the course of a land vehicle by comparing signals from wheel sensors with signals of a magnetic sensor In a method for determining the location of a land vehicle wherein the driving distance and course changes are derived from wheel pulses generated by sensors in the course of the revolution of the wheels of a vehicle axle by respectively a preset angle, t... | 01/23/1996 |
| 5485385 | Magnetic azimuth sensor compensation apparatus for vehicle navigation system and method thereof A motor vehicle-mounted navigation apparatus comprising an input section adapted for inputting data based on GPS positioning, an azimuth sensor and distance sensor adapted for establishing independent navigation signal input sections for inputting data re... | 01/16/1996 |
| 5479161 | Automatic calibration of redundant sensors A system for calibrating the sensors of a redundant sensor system by calculating a first set of error signals based on differences between a combination of the outputs and known values and calculating a second set of error signals based on differences bet... | 12/26/1995 |
| 5440484 | Calibration method for a relative heading sensor The invention provides a direction sensor and a method of calibrating a direction sensor having a relative heading sensor and an absolute heading sensor. The method allows calibration of both the relative heading sensor and the absolute heading sensor at ... | 08/08/1995 |
