数字补偿式巨磁阻抗传感器设计  

Design of digital compensation type giant magneto impedance sensor

作　　者：杨志成[1] 车振 

机构地区：[1]中国船舶重工集团公司第七一0研究所,湖北宜昌443003

出　　处：《传感器与微系统》2016年第2期100-102,共3页Transducer and Microsystem Technologies

摘　　要：地磁环境下弱磁信号的检测要求地磁传感器具有灵敏度高、工作范围宽的特点,非晶丝在高频交流激励下具有阻抗变化率高的特点,宜于用来作地磁传感器。但非晶丝线性工作区较短,不能完全覆盖地磁场范围,通过采用数字补偿技术可以补偿大部分地磁场,使传感器工作于非晶丝的线性区,提高了传感器的灵敏度,扩展了传感器的工作范围。通过测试,采用数字补偿技术的巨磁阻传感器灵敏度为71.133μV/n T,工作于-61 750.8~73 774.8 n T,与被测磁场的最大误差为2.45 n T。To detect weak magnetic signal under geomagnetic field,geomagnetic sensor that have characteristics of high sensitivity and wide operating range should be used,amorphous wire that has characteristic of high impedance variation rate in high frequency alternating current excitation is suitably used as magnetic sensor. But region of amorphous wire is too short to completely cover range of geomagnetic field,digital compensation technology can be used to compensate most of geomagnetic field,the sensor can work in the linear region of the amorphous wire,sensitivity of the sensor can be improved and working range can be extended. Through the test,the sensitivity of the sensor that using the digital compensation technology is 71. 33 μV / n T,the working range is- 61 750. 8 n T ~73 774. 8 n T and the maximum error of the detected magnetic field is 2. 45 n T.

关 键 词：数字补偿 巨磁阻抗 地磁传感器 非晶丝 灵敏度 模块 

分 类 号：TJ02[兵器科学与技术—兵器发射理论与技术]