摘要
介绍了一种基于巨磁电阻材料(G ian t m agnetores istance,GM R)为传感器的电子指南针。由于GM R磁场灵敏度高、易集成、能耗低以及成本低,其潜力明显优于磁通门、磁感应和霍尔效应等其他传感器。本文以GM R为传感器,构筑了水平状态下的电子指南针,精度达到±1;°并在系统中采用加速度计,分析了非水平状态下所产生的误差。
A kind of electronic compasses based on giant magnetoresistiance （GMR） magnetic sensor is introduced. Due to its high sensitivity to the change of magnetic field, easily being integrated, low power and relatively low cost, GMR has obviously an advantage over fluxgate, magnetic induction and Hall effect components in compass use. This paper describes a basic magnetic direction measurement method for GMR using. A bias magnetic field is applied in GMR sensor. Finally two groups of GMR sensor are used to determine the exact magnetic direction. A GMR compass facility is completed and it obtains ±1° sensitivity. Inconvenience of level is eliminated by calibration with an accelerometer.
出处
《数据采集与处理》
CSCD
北大核心
2005年第3期342-345,共4页
Journal of Data Acquisition and Processing
关键词
巨磁电阻
电子指南针
加速度计
灵敏度
giant magnetoresistance （GMR）
electronic compass
accelerometer
sensitivity
