几种常见的直流电桥误差计算分析  

Calculation and analysis of several common error of DC bridge

作　　者：范蓉蓉 张帆 Fan Rongrong;Zhang Fan(Nantong Institute of Metrology and Measurement,Nantong 226011,China)

机构地区：[1]南通市计量检定测试所,江苏南通226011

出　　处：《江苏科技信息》2021年第7期40-42,共3页Jiangsu Science and Technology Information

基　　金：南通市科技计划项目,项目名称:便携式绝缘耐压测试仪校准装置的研制,项目编号:MSZ18032。

摘　　要：文章介绍了检定过程中遇到的几种常见直流电桥,包括QJ23A型直流电阻电桥、QJ44型直流双臂电桥、QJ57型直流电阻电桥,并介绍了直流电桥检定规程中的允许基本误差公式。根据相对应的基准值、测量盘准确度等级、各量程的量限值或量程内的其他值,计算出相应的允许基本误差,以此判断所检定的直流电桥是否合格。This paper introduces several common DC bridges encountered in the process of verification,including QJ23A type DC resistor bridge,QJ44 type DC double-arm bridge and QJ57 type DC resistor bridge.The allowable basic error formula in the verification procedure of DC bridge is introduced.The allowable basic error is calculated according to the corresponding reference value,the accuracy level of the measuring panel,the limit value of each measuring range or other values within the measuring range,so as to judge whether the verified DC bridge is qualified.

关 键 词：直流电桥 基准值 准确度等级 允许基本误差 

分 类 号：TM131.3[电气工程—电工理论与新技术]