A New Micro-magnetism Sensor Based on Giant Magneto-impedance Effect and Multivibrator Bridge  

作　　者：孙骥 邓甲昊 蔡克荣 

机构地区：[1]National Key Laboratory of Mechatronic Engineering and Control,Beijing Institute of Technology

出　　处：《Defence Technology（防务技术）》2009年第3期175-180,共6页Defence Technology

基　　金：Sponsored by National Natural Science Foundation of China (60874100);China Aerospace Science and Technology Innovation Funds (CAST200834);Weapons Advanced Research Funds (9140A01010109BQ0116)

摘　　要：A novel sensor for micro-magnetic field detection is proposed based on the physical characteristics and giant magneto-impedance (GMI) effect of Fe-Co-Si-B amorphous wires. The sensor circuit ensures high sensitivity,high detection precision,fast response and small power consumption. The signal processing circuit taking complex programmable logic device (CPLD) as core chip not only improves the identification ability for pseudo ferromagnetic objects,but also ensures the real-rime response. It is the foundation for the proposed sensor to serve widely in military and civil. By using its high sensitivity for geomagnetism variation,as an application example,the sensor is used to compare and analyze different cars.A novel sensor for micro-magnetic field detection is proposed based on the physical characteristics and giant magnetco-impedance （GMI） effect of Fe-Co-Si-B amorphous wires. The sensor circuit ensures high sensitivity, high detection precision, fast response and small power consumption. The signal processing circuit taking complex pro- grammable logic device （CPLD） as core chip not only improves the identification ability for pseudo ferromagnetic objects, but also ensures the real-rime response. It is the foundation for the proposed sensor to serve widely in military and civil. By using its high sensitivity for geomagnetism variation, as an application example, the sensor is used to compare and analyze different cars.

关 键 词：巨磁阻抗效应 磁传感器 多谐振荡 可编程逻辑器件 信号处理电路 高灵敏度 传感器检测 传感器电路 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]