学术
摘 要:
介绍了一种基于巨磁电阻材料（Giant magnetoresistance,GMR）为传感器的电子指南针.由于GMR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GMR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.[著者文摘]
文章出处:
《数据采集与处理》-2005年20卷3期 -342-345页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1004-9037（2005）03-0342-04
Electronic Compass Based on Giant Magnetoresistance
Shang YuLin;Li JunWen;Di GuangJie
Abstract:
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.
Key words:
giant magnetoresistance （GMR）; electronic compass; accelerometer; sensitivity
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