摘要
介绍了三轴电子罗盘的测量原理。利用各向异性磁阻传感器和加速度传感器研制了带倾斜补偿功能的三轴电子罗盘,并论述了电子罗盘的硬件设计和软件流程。针对电子罗盘传感器的误差特点,采用十二位置标定法实现了罗盘的校正。在罗盘处于不同倾斜的情况下进行圆周测试,经误差校正和倾角补偿后的轨迹是大体重合的圆,有效降低了罗盘误差。在某些具备翻滚条件的应用场合,该校正方法还可有效补偿电子罗盘的罗差。
The measuring principle of three-axis electronic compass is introduced. A tilt-compensated three-axis electronic compass has been developed based on anisotropic magneto-resistive sensor and accelerometer. The hardware design and software flow chart are discussed. Aimed at the features of sensors＇ errors, a twelve-attitude calibration method has been used for the calibration of compass. According to experiment results of different tilt angle of circumference test, the trajectories are essentially coincident with circle after error calibration and tihcompensated, which effectively reduces the error. This calibration method is also effective for the compensation of magnetic deviation, in the case that rolling is possible.
出处
《传感器与微系统》
CSCD
北大核心
2010年第10期110-112,共3页
Transducer and Microsystem Technologies
基金
广西研究生科研创新计划资助项目(2009105950804M32)
关键词
电子罗盘
磁阻传感器
加速度传感器
误差校正
罗差
electronic compass
magneto-resistive sensor
acceterometer
error calibration
magnetic deviation
