一种工频电场与工频磁场检测装置研究  

Development of a device for power frequency electric field and magnetic field detection

作　　者：牛红涛[1] 隋良红 郭乃理[1] 李龙[1] 邓鑫林 NIU Hongtao;SUI Lianghong;GUO Naili;LI Long;DENG Xinlin(National Institute of Measurement and Testing Technology,Chengdu 610021,China;NIMTT Measurement and Testing Technology Co.,Ltd.,Chengdu 610021,China;School of Manufacturing Science&Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]中国测试技术研究院,四川成都610021 [2]中测测试科技有限公司,四川成都610021 [3]四川大学制造科学与工程学院,四川成都610065

出　　处：《中国测试》2018年第7期73-77,共5页China Measurement & Test

基　　金：四川省科技计划项目(2016GZ0023;2015GZ0084;2017GFW0004;2017TJPT0059)

摘　　要：针对高压线路、变电站附近的工频电场与工频磁场检测问题,研究一种基于STM32F407 ARM控制处理器的电场与磁场测量装置。设计一种基于金属球形电容的电场传感器实现工频电场强度测量,该装置采用磁阻传感器探测工频磁场强度,利用高精度仪表放大器AD620和16位8通道同步数据采集A/D转换模块实现对电场和磁场弱信号的放大与同步采集。根据传感器的特性,系统采用高阶多项式数据拟合算法可有效抑制磁场传感器的非线性影响,减小测量误差。试验结果表明:该装置测量稳定,便携性好,能够同时测量空间环境的工频电场与磁场强度,对工频电磁环境的监测有一定的参考意义。For the power frequency electric field and power frequency magnetic field detection near high voltage line and substation,an electric field and magnetic field detection device based on STM32F407 ARM control processor was developed.A sensor based on metal spherical capacitor was designed to measure the power frequency electric field intensity.Magnetoresistive sensors were applied to detect the power frequency magnetic field intensity.The amplification and synchronous data acquisition of weak signals of electric field and magnetic field were implemented by applying high precision instrumentation amplifiers AD620 and a synchronous data acquisition and A/D conversion module with 16 bits and 8 channels.A high order polynomial data fitting algorithm,which can effectively suppress the nonlinear influence of the magnetoresistive sensors and reduce the measurement error,was applied based on the characteristics of the sensors.The experimental results showed that the device was stable and portable.It can be used to simultaneously measure the power frequency electric field and magnetic field intensity in the environment,and has certain significance to monitor the electromagnetic environment of power frequency.

关 键 词：高压线路 工频电场 工频磁场 同步采集 多项式数据拟合 非线性 

分 类 号：TM937[电气工程—电力电子与电力传动]