Total electric field intensity of ultra-high voltage direct current power transmission line measurement mechanism and measuring method

The present invention relates to total electric field intensity of ultra-high voltage direct current power transmission line measurement mechanism and measuring method.The inventive system comprises microcontroller, field mill sensor, current signal voltage of transformation signal circuit, bandpass filtering, variable gain amplifier, A/D converter, motor-drive circuit, receiver, D/A converter, communication module and memory module.Microprocessor controls D/A converter exports analog voltage signal, a road analog voltage signal input motor-drive circuit, and control the rotating speed of direct current generator, DC motor Driver gear case operates, and gear case drives moving plate to rotate; Another road analog voltage signal input variable gain amplifier.Current signal voltage of transformation signal circuit converts the current signal on still in blade to voltage signal, then sends bandpass filtering to, then sends A/D converter to through variable gain amplifier, and A/D converter sampled voltage signal also sends microcontroller to.This device can on-line checkingi total electric field intensity of ultra-high voltage direct current power transmission line.