基于钴基非晶带GMI效应的闭环磁场传感器设计  

Design of closed-loop magnetic field sensor based on GMI effect of Co-based amorphous ribbon

作　　者：蒋峰[1] 

机构地区：[1]江苏信息职业技术学院机电工程系,江苏无锡214153

出　　处：《磁性材料及器件》2015年第1期64-68,共5页Journal of Magnetic Materials and Devices

摘　　要：利用钴基非晶带作为敏感元件,研制出一种基于非晶带GMI效应的磁场传感器。分析了传感器的工作原理,设计了该传感器的信号处理以及负反馈电路。通过负反馈方法组成闭环系统,提高了传感器的测量范围、线性度等性能。对传感器性能进行了测试,实验结果表明:在-260^+260 A/m磁场范围内,传感器线性度为0.57%,灵敏度为3.23m V/A·m-1,满量程输出1.68V。本传感器可应用于地球磁场、环境磁场等微弱磁场检测领域。A magnetic field sensor based on GMI effect was developed by using Co-based amorphous ribbon, and its operation principle analyzed. The signal processing and negative feedback circuits were designed. The measurement range and linearity of the sensor are improved by designing negative feedback forming closed loop system. A sensor was developed with linearity of 0.57%, sensitivity of 3.23 m V/A·m-1, full-scale output of 1.68 V, and magnetic field test range from-260 to ＋260A/m. The sensor can be used for weak magnetic field measurement including earth and environmental magnetic field.

关 键 词：非晶带 巨磁阻抗效应 磁场传感器 闭环 设计 性能 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]