A Calibration Method for Magnetic Sensors and Accelerometer in Tilt-compensated Digital Compass

摘要：

A calibration method for the outputs of magnetoresistive sensor and MEMS accelerometer in a tiltcompensated digital compass is introduced in this paper. Besides the magnetic deviation,the system errors of digital compass are generally affected by offsets,scale factors and misalignment errors of the sensors. The proposed method uses Poissons equations of magnetic deviation to describe the errors of the magneto-resistive sensor and MEMS accelerometer in a tilt-compensated compass,while using the Earths magnetic field and the acceleration of gravity to accomplish the calibration within 12 attitudes. The proposed method is applied to a digital compass module that consists of HMC1021/1022,ADXL202E,TLC2543andSTC12C5408. The maximum heading error is reduced from more than 23 degrees to 3 degrees after the calibration.

关键词： digital compass calibration method agneto-resistive sensor MEMS accelerometer.

作者: Zhi Li Xiang Li Yongjun Wang

作者单位: Department of Electronic Engineering,Guilin University of Electronic Technology 1st Jinji Road,541004,Guilin,P.R.China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 1945-1948

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）