交流电压源毫伏级量值准确测量的技术研究  

Research on the Technology of AC Voltage Source at mV Level

作　　者：丁香 黄艳 张磊 潘仙林[2] 石照民 张江涛[2] 王嵘瑜 DING Xiang;HUANG Yan;ZHANG Lei;PAN Xian-lin;SHI Zhao-min;ZHANG Jiang-tao;WANG Rong-yu(Beijing Institute of Metrology,Beijing 100029,China;National Institute of Metrology,Beijing 100029,China;Guizhou Institute for Metrology&Calibration,Guiyang,Guizhou 550003,China)

机构地区：[1]北京市计量检测科学研究院,北京100029 [2]中国计量科学研究院,北京100029 [3]贵州省计量测试院,贵州贵阳550003

出　　处：《计量学报》2022年第7期940-943,共4页Acta Metrologica Sinica

摘　　要：基于电压比例和交直流转换技术,提出了一种对交流电压源的毫伏级量值进行准确测量的方法。采用自行研制的二进制级联结构电压比例装置和792A交直流转换标准,将被测交流电压源的毫伏级量值溯源至交流电压国家基准。实验采用替代测量法,通过选用不同电压比例和不同792A量程的组合,在55 Hz~5 kHz频率范围内,对1台5720A多功能校准源10~200 mV范围的交流电压进行准确测量。结果表明,各毫伏级交流电压示值相对误差的绝对值均不超过±40μV/V,测量结果扩展不确定度优于80μV/V,满足交流电压源毫伏级量值溯源需求。An accurate calibration method of millivolt AC voltage source based on voltage proportional and AC/DC transfer technology is proposed.The binary cascaded voltage proportional device and 792A AC/DC transfer standard are adopted to trace the millivolt AC voltage to a known AC voltage.By using a substitution measurement method,and choosing the combination of different voltage proportion and different range of 792A,the AC voltage in the range of 10~200 mV of a 5720A multifunctional calibration source is accurately measured in the frequency range of 55 Hz~5 kHz.Results show that the relative error of any measured millivolt AC voltage is within±40μV/V,and the expanded uncertainty is better than 80μV/V,which shows that the proposed method can meet the traceability requirements of millivolt AC voltage source.

关 键 词：计量学 交流电压 感应分压器 电压比例技术 量值溯源 

分 类 号：TB971[一般工业技术—计量学]