基于非晶带巨磁阻抗效应的新型弱磁场传感器  

Novel Weak Magnetic Sensor Based on Giant Magneto-Impedance Effect in Amorphous Ribbon

作　　者：鲍丙豪[1] 蒋峰[1] 赵湛[1] 宋雪丰[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《传感技术学报》2006年第6期2380-2383,共4页Chinese Journal of Sensors and Actuators

基　　金：安徽省自然科学基金资助项目(01042309);江苏大学高级人才基金资助项目(JDG-120)

摘　　要：利用短时矩形脉冲电流对近零磁致伸缩系数钴基非晶态合金带进行退火处理,得到约114%的巨磁阻抗变化率.同时利用CMOS多谐振荡电路产生窄脉冲电流序列对前面处理过的非晶带进行激励,制作成灵敏度高、稳定性好、功耗低的弱磁场传感器.对传感器的工作原理进行了分析,并设计了信号处理电路.该传感器可应用于对弱磁场的检测.The GMI ratio of about 114 % is obtained in near zero-magnetostrictive Co-based amorphous alloy ribbon annealed by short time rectangular pulse current. A sensitive, stable and low power consumption magnetic sensor is constructed using a CMOS multivibrator circuit, in which a sharp pulse train current is applied to the treated amorphous ribbon. Its operating principle is analyzed. The signal processing circuit of magnetic sensor is designed, too. The sensor can be applied to measure the weak magnetic field.

关 键 词：巨磁阻抗效应 非晶态软磁合金带 脉冲电流退火 弱磁场传感器 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]