摘要
近零磁致伸缩系数的Co66.3Fe3.7Si12B18非晶薄带卷制成环形磁芯,在2 kA/m横向磁场作用下,用密度为25 A/mm2的脉冲电流退火30 s后作为敏感元件,提出了一种利用巨磁阻抗效应制作的新型非接触弱电流传感器。磁芯采用高频脉冲电流励磁,信号处理电路由峰值检波、低通滤波及差动电路构成。分析了传感器的工作原理,对传感器信号处理电路进行了参数设计计算,对测量结果进行了分析。通过对电路参数的优化,提高了传感器的分辨力、线性度及灵敏度。
A novel non-contact type weak current sensor using giant magneto-impedance effect in Co66. 3 Fe3.7 Si12 B18 amorphous toroidal core annealed with 25 A/mm^2 pulse current density under a transverse magnetic field of 2 kA/m for 30 s is presented. The toroidal core was excited by sharp pulse current. The sensor cir- cuit is composed of peak value detector,Butterworth low-pass filter and differential amplifier. The operation principle of the sensor is analyzed. The parameters of signal processing circuit are designed and the measurement results are preliminary analyzed. The linearity, sensitivity and resolution of the sensor are improved by optimizing design to the circuit parameters.
出处
《电子器件》
EI
CAS
2006年第4期1035-1038,共4页
Chinese Journal of Electron Devices
基金
江苏大学高级人才专项基金资助项目(03JDG-012)
安徽省自然科学基金资助项目(01042309)
关键词
钴基非晶薄带
环形磁芯
巨磁阻抗效应
非接触测量
弱电流传感器
Co-based amorphous ribbon
toroidal core
giant magneto-impedance
non-contact measurement
weak current sensor
