Magnetic Detector Based on GMI Effect of Amorphous wire
The giant magneto-impedance (GMI) effect of amorphous wire and its affecting factors were analyzed.Magnetic impedance (MI) element was designed with a special structure.So the difficulties of complex negative feedback circuit and winding double circuits on amorphous wire were solved.High frequency current pulse generator,signal preprocessing circuit and digital signal processing module were designed.Thus a low magnetic field detector was realized.The sensor and the detector were tested in laboratory.The experiment results proved that the sensor had good linearity at the magnetic field range from-3Oe to +3Oe.The sensitivity reached 65 mv/Oe and the sensor had well temperature stability.The magnetic field resolution can reach 50 μOe and small magnetic target can be detected.
GMI effect Magneto Impedance element magnetic detector
Shuang Cheng Wei Jia Hao Deng Chao Han Yu Ying Yang Jing Cui
Science and Technology on Electromechanical Dynamic Control Laboratory,Beijing 100081,China;School of Mechatronic Engineering,Beijing Institute of Technology Beijing 100081,China
国际会议
广州
英文
1160-1163
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）