摘要
介绍了基于磁阻传感器和MEMS加速度计的电子罗盘的倾斜补偿原理.分析了电子罗盘工作过程中可能存在的误差及其来源,对A/D采样的数据进行有效的算法预处理;对测量精度影响最大的罗差构造数学模型并做相应的算法处理.分析实验数据可知:最大误差达35.5°的电子罗盘原型样机系统经过补偿后,误差降至3°以内.对罗盘系统精度没有达到1°以内的原因做了说明,并提出了相应的补偿方案,实验证明,该系统可用于普通导航领域.
A 3-axes electronic compass and tilt compensated principle are introduced, which is based on magneto resistive sensor and MEMS accelerometer. The possible error and its source are analyzed. A/D sampling data is pretreat using effective arithmetic; Constructing math model and making relevant arithmetic is in order to compensate the environment error which has most effect on the precision. The experiment data shows that the maximum error is drop from 35. 5°to 30° even better, when the compass system is compensated. The reason which the precision didn＇t achieve 1° or better was also explained, and the experiment shows that the compass system can be used in common navigation field.
出处
《传感技术学报》
CAS
CSCD
北大核心
2007年第6期1335-1337,共3页
Chinese Journal of Sensors and Actuators
基金
西北工业大学研究生创新基金资助(05060)
关键词
电子罗盘
误差分析
罗差补偿
算法
electronic compass
error analysis
environment error compensation
Arithmetic
