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.
出处
《传感技术学报》
CAS
CSCD
北大核心
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)
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
giant magneto-impedance effect
amorphous soft magnetic alloy ribbon
pulse current annealing
weak magnetic sensor
