直流标准电阻器功率变差的精密测量研究  

Research on accurate measurement of DC standard resistance power variation

作　　者：梁波[1] 邵海明[1] 王昊[1] 林飞鹏[1] 尹庭申 谢立[1] Liang Bo;Shao Haiming;Wang Hao;Lin Feipeng;Yin Tingshen;Xie Li(National Institute of Metrology, Beijing 100029, China)

机构地区：[1]中国计量科学研究院,北京100029

出　　处：《电测与仪表》2017年第22期54-58,共5页Electrical Measurement & Instrumentation

基　　金：国家质检总局量值传递与质量安全项目(ALC1506)

摘　　要：文中提出了一种精密测量直流标准电阻器功率变差(或电流依赖性)的方法。在直流电流比较仪电阻电桥被测电阻的电流部分增加另外一个1:1直流比较仪量程扩展器,实现被测电阻器测量电流的高准确度倍增;通过与按双电桥内臂串联的两只参考标准电阻的三次比较测量,可以测量倍增电流(功率四倍增加)引起的被测电阻的变化。循环倍增电流,实现对被测电阻功率变差或者电流依赖性的精密测量。实际测量了一只商用10Ω标准电阻的功率变差。结果表明电阻功率变差是二次曲线,与阻值温度曲线具有相似性。A method to accurately measure power variation(current dependence)of a resistance standard is presented in this paper.Using a direct current comparator(DCC)resistance bridge and a standard ratio device with ratio1:1,they can double the test current and four times the power accurately.After three measurements compared to two resistance standards,the change of resistance caused by power change is measured.An example of10Ωpower variation is given by this method and the result is analyzed.Results show that the variation of resistance power is two times curve,which has similarity with the resistance temperature curve.

关 键 词：计量学 直流标准电阻 直流电流比较仪(DCC) 功率变差 电流依赖性 

分 类 号：TM93[电气工程—电力电子与电力传动]