基于锁相放大原理的磁电传感信号放大器  

Magnetoelectric Sensing Signal Amplifier Based on Lock⁃in Amplifier

作　　者：宋思宇 于向前[1] 陈鸿飞[1] 余中辉 董蜀湘 SONG Si-yu;YU Xiang-qian;CHEN Hong-fei;YU Zhong-hui;DONG Shu-xiang(Institute of Space Physics and Applied Technology,School of Earth and Space Sciences,Peking University,Beijing 100871,China;Department of Materials Science and Engineering,College of Engineering,Peking University,Beijing 100871,China)

机构地区：[1]北京大学地球与空间科学学院空间物理与应用技术研究所,北京100871 [2]北京大学工学院材料科学与工程系,北京100871

出　　处：《仪表技术与传感器》2021年第12期38-44,50,共8页Instrument Technique and Sensor

基　　金：北京大学2020年教改项目(7100901182)。

摘　　要：基于纵向-横向(L-T)模式磁电复合材料制作的磁电传感器输出信号较为微弱,且存在噪声干扰。设计的磁电传感信号放大器(MSSA)利用锁相放大原理,可以将磁电传感器输出信号从噪声中提取并放大。MSSA可搭载在卫星上测量空间环境磁场。对MSSA的工作原理和电路结构进行了介绍,并对电路进行了仿真分析,最后用亥姆霍兹线圈对MSSA成品进行了磁场测量实验。实验结果表明,MSSA能够有效提取并放大磁电传感信号,其磁场量程、灵敏度和分辨率符合设计需求,可实现对空间环境磁场的测量。The output signal of the magnetoelectric sensor based on longitudinal⁃transverse(L-T)mode composites is weak and contains noise disruption.The magnetoelectric sensing signal amplifier(MSSA)was designed based on the principle of lockin amplifier.MSSA can amplify the output signal of the sensor and extract it from noise.MSSA can be boarded on the spacecraft to detect space magnetic field.This paper introduced the working principle and the circuit of MSSA,and gave simulation analysis of the circuit.Experiment of magnetic field measurement from Helmholtz coil was carried out on MSSA.The result shows that MSSA can extract and amplify the magnetoelectric signal effectively.The measurement range,sensitiveness and resolution of MSSA meet the requirement of detecting space magnetic field.

关 键 词：L-T模式磁电复合材料 磁电传感器 磁电传感信号放大器 锁相放大 亥姆霍兹线圈 磁场测量 

分 类 号：V11[航空宇航科学与技术—人机与环境工程]