脉冲电场测试系统标定方法  

Calibration Method of Pulse Electric Field Test System

作　　者：张龙[1] 魏光辉[1] 潘晓东[1] 胡小锋[1] 张勇强 

机构地区：[1]军械工程学院电磁环境效应国家重点实验室,石家庄050003 [2]空军石家庄飞行学院,石家庄050081

出　　处：《高电压技术》2014年第3期930-936,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(6131380301);国家自然科学基金(61001050)~~

摘　　要：为保证脉冲传感器对脉冲电场测试结果的准确性,必须对其进行标定。针对实验室难以产生几十kV/m的电场环境,提出了基于弱场环境标定低灵敏度脉冲传感器的方法,即利用频谱仪窄带接收特性降低噪声获得传感器输出响应,同时由标准场强仪测得传感器所测环境电场强度(简称场强),通过传递标准法来标定传感器。另对标定环境进行分析得到:当测试频率>500 MHz时,宜采用开阔试验场远场区;测试频率<500 MHz时,宜采用GHz横电磁波传输室标定传感器。根据提出的标定方法标定了低灵敏度脉冲传感器,得到传感器输出电压值与被测场强的关系,即当传感器测试场强时,终端设备示波器每mV电压值对应约为200 V/m的电场强度。最后通过强场环境标定传感器,标定结果与弱场环境标定结果相差<1 dB,验证了弱场环境标定结果的准确性,表明基于弱场环境标定低灵敏度脉冲传感器的方法是合理的。It is necessary to calibrate the pulse sensor for accurately measuring pulse electric field. Since it is hard to generate electric fields of several kV/m in common laboratories, we put forward a new calibration method based on weak electric field for low-sensitivity pulse sensors. The method includes obtaining output response of a sensor through nar- row-band trait and noise-reducing of spectrometer, testing electric field strength with the sensor with standard field strength meter, and finally calibrating the sensor using transfer standard method. We also analyzed the environment for this calibration： far-field of open area test site was suggested for test frequency above 500 MHz, and gigahertz transverse electromagnetic cell for test frequency below 500 MHz. Using the proposed calibration method, we calibrated a low-sensitivity pulse sensor in weak electric field, and obtained the relation between the sensor＇s output and the electric field： in tests using the sensor, every millivolt of output shown in oscilloscope corresponds to approximately 200 V/m. The sensor was also calibrated in strong electric field environment, the difference between two calibration results were less than 1 dB, verifying the accuracy of the proposed sensor calibration method in weak electric field.

关 键 词：脉冲传感器 标定 幅频特性 开阔试验场 近场 远场 GHz横电磁波传输室 

分 类 号：TM937[电气工程—电力电子与电力传动]