基于磁电阻效应的高精度电子罗盘设计  

Design of high precision electronic compass based on magnetoresistance effect

作　　者：陈敏[1] 唐晓莉[1] CHEN Min;TANG Xiao-li(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都610054

出　　处：《磁性材料及器件》2020年第2期20-23,69,共5页Journal of Magnetic Materials and Devices

摘　　要：为解决磁通门传感器式电子罗盘不便携带和霍尔效应传感器式电子罗盘精度易受影响的问题,采用基于磁电阻传感器和三轴加速度计的LSD303DLH芯片作为数据采集模块,以STM32F7作为微控制单元,设计利用电子罗盘测定方位角的系统,由样机进行测试与实验验证。实验结果证明测量稳定,且在附加10倍地磁场大小的外加磁场下仍能稳定测量,且测量误差均在1°范围内,实现了系统便携化、输出信号精度高的目标。In order to solve the problem that the fluxgate sensor-based electronic compass is difficult to travel conveniently and the Hall effect sensor-based electronic compass is vulnerable to impact on its accuracy,the system uses LSD303DLH chip based on magnetoresistive sensor and three-axis accelerometer as data acquisition module,STM32F7 as micro-control unit,a system for measuring azimuth angle by electronic compass was designed,which is tested and experimented by prototype.The experimental results show that the system is stable,and can be measured stably in an external magnetic field of 10 times that of the geomagnetic field.The measurement errors are all within 1°range,thus realizing the goal of portable system and high accuracy of output signal.

关 键 词：电子罗盘 磁电阻传感器 误差补偿 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]