隧道磁电阻效应磁场测量方法研究  

Study on magnetic field measurement method of tunneling magnetoresistance effect

作　　者：杨文荣[1] 郭兵 杨晓锐 赵琳 

机构地区：[1]河北工业大学电气工程学院,天津300130

出　　处：《实验技术与管理》2017年第12期31-35,共5页Experimental Technology and Management

基　　金：河北省自然科学基金项目(E2015202241);2017年河北省级研究生创新资助项目(220056)

摘　　要：提出了一种采用三轴隧道磁电阻传感器作为测量探头,双轴定向、单轴独立测量的三维磁场测量方法。测量时转动测量探头,使两定向轴输出电压均为零,此时独立测量轴与磁场方向一致,实现独立轴直接测量总磁场。利用曲线拟合,获得了测量探头的输出电压与磁感应强度在一定范围内的线性函数关系。通电螺线管中心轴线上磁感应强度测量实验结果表明,采用该方法的测量系统,测量±0.3T范围内的磁场,最大相对误差为-4.3%,精确度高于0.3%。A 3 D magnetic field measurement method with the double-axle orientation and single-axle independent measurement is proposed by using the tribal-axle tunnel magnetoresistance sensor as the measuring probe.During the measurement,the measuring probe is rotated so that the output voltage of the double directional axle is zero,and the independent measuring axle is in accordance with the direction of the magnetic field to realize the direct measurement of the total magnetic field by the independent axle.The linear relationship between the output voltage of the probe and the magnetic induction intensity in a certain range is obtained by using the curve fitting.The experimental results of the magnetic induction intensity measurement on the central axle of the electric solenoid show that by using this method to measure the magnetic field in the range of±0.3 Ts,the maximum relative error is-4.3%,and the accuracy is higher than 0.3%.

关 键 词：隧道磁电阻传感器 三维磁场测量 曲线拟合 螺线管 

分 类 号：O4-33[理学—物理]