摘要
介绍了三维磁场精密测量系统的研制,利用差动方式连接的6个霍尔元件构成三维磁场传感器,通过压频变换器完成数据采集,并采用电压比测量法来补偿温度变化对霍尔元件输入电阻的影响.对系统进行了高精度的标定,消除了温度变化对霍尔元件灵敏度系数的影响.标定后的系统达到了0.5%的精度,并利用这一系统对高速磁悬浮列车的气隙磁场进行了测量.
The design of a 3-D precision magnetic field measurement system is introduced in this paper. The 3-D magnetic field sensor is made of six Hall Effect device connected through differential mode. The data acquisition is achieved by voltage-to-frequency device. The influence of the surround temperature on the Hall Effect device＇s input resistance is compensated by using voltage proportional method. The high precision calibration is made for this system to eliminate the temperature＇s influence on sensing coefficient of the Hall Effect device. The calibrated system＇s precision reaches 0. 5% and this system is used to measure the air-gap magnetic field of a high speed magnetic levitation vehicle.
出处
《测试技术学报》
EI
2005年第3期279-282,共4页
Journal of Test and Measurement Technology
基金
国家863计划'高速磁浮交通技术'重大专项资助(2001AA505000-109)
关键词
三维磁场测量
霍尔效应
电压比测量法
计算线圈法
温度补偿
3-D magnetic field measurement
Hall Effect
voltage proportional method
computing coil method
temperature compensation
