About 46 results
https://drivepatents.com/patents/1002806 · 2 May 2012
A method and system are provided for performing a background calibration of a magnetometer. The method comprises obtaining a plurality of magnetometer readings; applying an active set of calibration parameters to the plurality of magnetometer readings to o...
https://drivepatents.com/patents/1002808 · 2 May 2012
A method and system are provided for calibrating a magnetometer. The method comprises determining a current quality level associated with magnetometer readings obtained using an active set of calibration parameters; and lowering a quality threshold for a b...
https://drivepatents.com/patents/1009615 · 7 Sep 2011
In a magnetic data processing device, an input part sequentially receives magnetic data q i output from a magnetic sensor. A storage part sequentially stores the magnetic data received through the input part. An offset derivation part derives an offset acc...
https://drivepatents.com/patents/1010514 · 3 Aug 2011
It is possible to rapidly or highly accurately estimate a highly reliable offset according to situations and improve further the reliability of the estimated offset even if a measurement data is not obtained in a space in which the magnitude of a vector ph...
https://drivepatents.com/patents/1014870 · 16 Mar 2011
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 syste...
https://drivepatents.com/patents/1069013 · 22 Mar 2006
A compass system comprises an electronic compass capable of providing a raw compass reading, at least one adjustment factor relating to a position of the electronic compass, and a compensation device selectively providing a compensated compass reading base...
https://drivepatents.com/patents/1075951 · 13 Jul 2005
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-...
https://drivepatents.com/patents/1076859 · 15 Jun 2005
Provided is a method and apparatus for using a magnetic field. The method includes: measuring and storing a series of magnetic field magnitude values measured in different directions by sensors rotating relative to the magnetic field; and checking whether ...
https://drivepatents.com/patents/1077407 · 1 Jun 2005
A mobile terminal apparatus 1 uses an acceleration sensor as a tilt angle sensor 24 and delivers a variety of applications based on a result of detection. A processing unit 10 counts the number of steps that a person takes, based on low-frequency accelerat...
https://drivepatents.com/patents/1077909 · 11 May 2005
A motion estimation method and system for a mobile body are provided. The method includes: obtaining magnetic field information from compass information of the mobile body; comparing the magnetic field of the mobile body with a predetermined value and dete...