非晶丝MI效应磁场方位角测量系统

摘要

A measurement system of magnetic azimuth is developed based on biaxial MI effect. Magneto-impedance effect driven by sharp pulse current is analyzed. A sensitive,stable and low power consumption magnetic sensor is constructed using a CMOS multivibrator circuit,in which a sharp pulse current is applied to the amorphous wire. It can realize calculation of magnetic azimuth and digital output through LabVIEW software. Experiments show that the system has good interface,easy operation,high precision and can store,analyze measurement data easily.%利用双轴MI效应设计并制作了一种磁场方位角测量系统。分析了尖脉冲电流激励下MI效应，并设计CMOS多谐振荡电路产生尖脉冲电流对非晶丝激励，制作成灵敏度高、稳定性好、功耗低的磁场传感器。利用LabVIEW软件，实现磁场方位角的计算以及数字化显示。结果表明，该测量系统界面良好，易于操作，测量准确，同时便于对测量数据进行保存与分析。