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| Number | Title | Issue Date |
| 8140285 | Compass system and method for determining a reference field strength A compass system includes a magnetic field sensor for measuring an ambient magnetic field and a magnetic field generator, corresponding to the magnetic field sensor, configured to generate a reference magnetic field. The magnetic field sensor is configured to measur... | 03/20/2012 |
| 8117002 | Method and device for measuring a vehicle The invention relates to a method and a device for measuring a damaged vehicle, in which inclination of the vehicle is measured with the measuring device and the measured inclination of the vehicle is used as a datum plane, distances of measuring points (9... | 02/14/2012 |
| 8005635 | Self-calibrated azimuth and attitude accuracy enhancing method and system (SAAAEMS) A method and system for Self-calibrated Azimuth and Attitude Accuracy Enhancing are disclosed, wherein SAAAEMS approach is based on fully auto-calibration self-contained INS principles, not depending on magnetometers for azimuth/heading determination, and thus the s... | 08/23/2011 |
| 7949485 | Portable terminal device A portable terminal device 101 of the invention having at least two or more cases joinable in a plurality of different joining shapes includes a magnetism detection section 8 being provided in at least one of the two or more cases for detecting a magne... | 05/24/2011 |
| 7933729 | Operation device control apparatus, operation device control method, information storage medium, and operation device To provide an operating device control device for obtaining information about a rotational angle of an operating device, while reducing the influence due to an individual difference and/or variation of a reference sensor signal in accordance with a sensor signal out... | 04/26/2011 |
| 7865323 | Calibration program and electronic compass The object of the present invention is to provide a calibration program and an electronic compass that make it possible to calibrate the output of a magnetic sensor with a small amount of computation while a user does not notice the execution of calibration. A calib... | 01/04/2011 |
| 7835878 | Travel angle detection system for mobile object In a travel angle detection system for a mobile object having a detector installed in the mobile object to produce angular velocity outputs successively, the detector outputs are read and one output is determined as a provisional calibration value indicative of zero... | 11/16/2010 |
| 7835879 | Method and device for calibrating a magnetic sensor Measurements are acquired from a magnetic sensor during a non-pre-ordered movement, and a plurality of sets of solutions are determined for respective expected values of intensity of the Earth's magnetic field. The solutions are defined by a plurality of parameters,... | 11/16/2010 |
| 7818136 | Portable electronic device capable of re-calibrating azimuth and method thereof One or more sensors in a portable electronic device have individual status parameter in response to different using configurations. When the portable electronic device operates in a first using configuration, an electronic compass in the portable electronic device l... | 10/19/2010 |
| 7613581 | Method, apparatus, and medium for calibrating compass sensor in consideration of magnetic environment and method, apparatus, and medium for measuring azimuth using the compass sensor calibration method, apparatus, and medium A method of calibrating a compass sensor in consideration of a magnetic environment is provided. The method includes (a) acquiring magnetic force data by rotating a compass sensor 360 degrees, the compass sensor including a biaxial magnetometer, (b) fitting the acqu... | 11/03/2009 |
| 7558688 | Angle calibration of long baseline antennas A method for calibrating a sensor mounted on an aircraft includes the steps of: using an optical device to create reference points which define a reference line that is parallel to both horizontal and vertical planes of the sensor, and using the reference line to ca... | 07/07/2009 |
| 7532991 | Magnetic data processing device In a magnetic data processing device, an input part sequentially inputs magnetic data outputted from a two-dimensional or three-dimensional magnetic sensor. The magnetic data is two-dimensional or three-dimensional vector data that is a linear combination of a set o... | 05/12/2009 |
| 7433798 | Solid state orientation sensor with 360 degree measurement capability A solid state inclinometer sensor system includes a digital network of devices. Each device of the network includes a solid state inclinometer attached to a mounting structure. The inclinometer includes gravity sensors and a processor. The gravity sensors are mounte... | 10/07/2008 |
| 7421792 | Apparatus and method of calibrating azimuth of mobile device Provided are an apparatus and method of calibrating azimuth of a mobile device. The apparatus includes: a motor; a magnetic field measuring unit disposed in the mobile device and measuring magnetic field data indicating magnitudes of a magnetic field in different di... | 09/09/2008 |
| 7389590 | Geomagnetic sensor for computing azimuth and method thereof A geomagnetic sensor for computing an azimuth and a method thereof. The geomagnetic sensor includes a geomagnetic sensor module, including X, Y and Z axis fluxgates orthogonal to one another, for performing normalization for mapping output values of the X, Y and Z a... | 06/24/2008 |
| 7376527 | Azimuth measuring device An azimuth measuring device is provided that can obtain offset information when the direction of the azimuth measuring device is arbitrarily changed. The offset information is calculated based on coordinates of a reference point obtained by a reference point estimat... | 05/20/2008 |
| 7363718 | Orientation data generation method, orientation sensor unit and portable electronic equipment Data are input from a geomagnetic sensor that detects magnetic fields in three axial directions, and magnetic field data are measured on the basis of the input data. The measured magnetic field data are sequentially stored, and a determination is made as to whether ... | 04/29/2008 |
| 7358722 | Integrated three-dimensional magnetic sensing device and method to fabricate an integrated three-dimensional magnetic sensing device An integrated three-dimensional magnetic or any field sensing device and a method to fabricate an integrated three-dimensional magnetic sensing device is presented. An integrated three-dimensional magnetic sensing device comprises an apparatus that defines at least ... | 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 |
| 7352177 | Three-axis fluxgate-type magnetism detecting device and method A three-axis fluxgate-type circuit having three fluxgate sensors for outputting three analog voltage values respectively. A controller normalizes three digital voltage values corresponding to said three analog voltage values, select a set of linear voltage values fr... | 04/01/2008 |
| 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 |
| 7337549 | Input device for using geomagnetic sensor and a method thereof for generating input signal An input device using a geomagnetic sensor includes a geomagnetic sensor outputting a voltage corresponding to geomagnetism, and a control part calculating an azimuth using the voltage output from the geomagnetic sensor and calculating the rotation angle by comparin... | 03/04/2008 |
| 7325320 | Method for estimating the accuracy of azimuthal orientations and portable sighting device In a method according to the invention for estimating the accuracy of azimuthal orientations (a) of a measuring device (1) having an electronic magnetic compass (2), a plurality of determinations of an azimuthal orientation (a, a′, a″, a′″, aâ€... | 02/05/2008 |
| 7324906 | Compass sensor unit and portable electronic device In a compass sensor unit, an azimuth data computing method is carried out by the steps of: inputting a signal from a geomagnetic sensor to measure magnetic field; determining whether to store measurement data of the magnetic field based on a distance from the last s... | 01/29/2008 |
| 7310504 | IF frequency response characterization employing overlapping frequency bands A method and system characterizes an IF response of a receiver under test, such that an effect on the characterization by errors associated with uncertainties in knowledge of an RF stimulus signal used to perform the characterization is reduced. The method includes ... | 12/18/2007 |
| 7305315 | Method of compensating tilt using two-axis geomagnetic sensor, and acceleration sensor, and apparatus thereof The present general inventive concept relates to a method of compensating tilt using a two-axis geomagnetic sensor and an acceleration sensor and an apparatus. Using the principle where a geomagnetic field value measured in a state where one axis of the two-axis geo... | 12/04/2007 |
| 7295943 | Geomagnetic sensor for calibrating azimuth by compensating for an effect of tilting and method thereof A geomagnetic sensor capable of calibrating an accurate azimuth even if the geomagnetic sensor is in a tilting state. The geomagnetic sensor includes a geomagnetism measuring unit, having a drive pulse generating unit for generating a pulse signal and two-axis flux ... | 11/13/2007 |
| 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 |
| 7271586 | Single package design for 3-axis magnetic sensor A sensor package comprising an X-axis sensor circuit component, a Y-axis sensor circuit component, and a Z-axis sensor circuit component, each mounted to a top surface of a rigid substrate. To minimize the height of the package, a channel is cut out of the top surfa... | 09/18/2007 |
| 7266452 | Electronic compass system An electronic compass system includes a magnetic sensor circuit having at least two sensing elements for sensing perpendicular components of the Earth's magnetic field vector. A processing circuit is coupled to the sensor circuit to filter, process, and compute a he... | 09/04/2007 |
| 7266470 | Method for mitigating interference between nearby proximity sensors A method, that arbitrates when each of a plurality of sensors can perform an object detection procedure, assigns a different binary address to each sensor. Each bit in the binary address is sequentially selected. While a bit is selected, every sensor applies a signa... | 09/04/2007 |
| 7260896 | Electronic compass and method of calibration An electronic compass assembly includes a first collection portion and a second collection portion that each collect magnetic field data. The magnetic field data collected by the second collection portion partially overlaps the magnetic field data collected by the f... | 08/28/2007 |
| 7263453 | Shaft feedback sensor error detection Methods and apparatus for detecting a sensor angle error in a system in which a measured quantity is determined on the basis of a phase of a signal. A signal derived from the measurement of multiple sensors is ascribed to a vector in a two-dimensional space, and a n... | 08/28/2007 |
| 7262601 | Aircraft equipped for airborne vector magnetic exploration surveys An aircraft equipped for airborne vector magnetic exploration surveys comprising three magnetometers orthogonally mounted to measure the components of the earth's vector magnetic field; two rotation sensors mounted to measure the angular orientation of the aircraft;... | 08/28/2007 |
| 7254479 | Apparatus and method for determining geographical location relative to a designated geographical location with a mobile communication device The present invention apparatus and method that allows the geographical location of a user with respect to a designated geographical location to be determined in a manner that cost-efficient, the user given several options regarding the way in which his of her prese... | 08/07/2007 |
| 7251567 | Electronically calibrated beacon for a horizontal directional drilling machine A monitoring system for use with a horizontal directional drilling machine and adapted to determine the roll and/or pitch orientation of the downhole tool assembly by detecting signals from a sensor assembly supported by the downhole tool assembly. In a preferred em... | 07/31/2007 |
| 7248983 | Electronic compass and method of controlling an electronic compass using independent calibration and compass heading modules A method for controlling an electronic compass includes receiving raw magnetic field data into a calibration module and determining a calibration output based upon the raw magnetic field data. The raw magnetic field data is also received into a compass heading modul... | 07/24/2007 |
| 7237343 | Orientation data generation method, orientation sensor unit and portable electronic equipment Data are input from a geomagnetic sensor that detects magnetic fields in three axial directions, and magnetic field data are measured on the basis of the input data. The measured magnetic field data are sequentially stored, and a determination is made as to whether ... | 07/03/2007 |
| 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 |
| 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 |
