摘要
回顾了巨磁阻抗（GMI）效应发展的历史,介绍了巨磁阻抗（GMI）效应起源、理论方法,设计制作了一种基于巨磁阻抗（GMI）效应的电流传感器,并采用CoZrB等材料的非晶带制作成螺旋式结构探头。该传感器由科比茨振荡电路,前置放大器,整流电路和调零输出放大器构成;前置放大器输入端联接非晶带两端,前置放大器放大的信号由输出端接整流电路,整流电路将高频交流信号转化为二倍交流信号峰值的直流信号,再接调零输出,放大器输出接A/D转换及数字显示部分。采取非接触式方式,达到测量电流目的。
In this thesis,we mainly reviewed the history of GMI effect,introduced the origin of GMI,and the methods in researching GMI effect.We designed the current sensor based on GMI effect,the amorphous materials such as CoZrB are used to develop spiral structure probe.The sensor is consisting of colpitts oscillator,peramplifier,rectifier and Amplifier with zero-adjust.The input of per-amplifier connects to both ends of the amorphous materials.The amplified signal of per-amplifier connects to the rectifying circuit from the output.The rectifying circuit converts the high frequency AC signal into DC signal which of double AC signal peak,and then zero output.The amplifier output connects to A/D conversion and digital display.The non-contact method is used in measuring Current value.
出处
《电测与仪表》
北大核心
2010年第7期16-20,共5页
Electrical Measurement & Instrumentation
