极低频电磁辐射检测仪的传感器选择分析

Sensor Selection and Analysis of Extremely-Low-Frequency Electromagnetic Radiation Detector

针对目前极低频电磁辐射检测仪主要采用霍尔元件或电感线圈作为检测电磁辐射的传感器,分析两种传感器的测量原理、频率响应和灵敏度等,并进一步比较相应检测仪的模拟信号处理部分,包括信号的采集、放大、滤波、积分处理等。通过在原理上对这两种测量方式进行比较,为两种传感器在极低频电磁辐射测量中的应用提供指导。

Along with the raising of electrical equipment voltage grade,extremely-low-frequency electromagnetic radiation represented by power frequency electromagnetic radiation has received more and more attention.At present,extremely-low-frequency electromagnetic radiation detector mainly uses Hall element or inductance coil as the sensor,of which each has advantages and disadvantages in the application.This paper analyzed the measurement principle,frequency response,sensitivity,and further analyzed the analog signal processing,including signal acquisition,amplification,filtering and integration processing,comparing the measurement means based on principle,consequently gave a guide to the application of the sensors in extremely-low-frequency electromagnetic radiation detection.