A Calibration Technique for a Two-Axis Magnetic Compass in Telematics Devices

Seong Yun Cho, Chan Gook Park
2005 ETRI Journal  
This paper presents an efficient algorithm for using the two-axis magnetic compass in portable devices. The general magnetic compass module consists of a three-axis magnetic compass and a two-axis inclinometer to calculate tilt-compensated azimuth information. In this paper, the tilt error is compensated using just a two-axis magnetic compass and two-axis accelerometer. The third-axis data of the magnetic compass is estimated using coordinate information that includes the extended dip angle and
more » ... tilt information. The extended dip angle is estimated during the normalization process. This algorithm can be used to provide the tilt-compensated heading information to small portable devices such as navigation systems, PDAs, cell phones, and so on.
doi:10.4218/etrij.05.0104.0192 fatcat:hgfdr254gvaeddz52eshs66ad4