惠斯登电桥的灵敏度及换臂测量的数据处理

The Sensitivity of Wheatstone-Bridge and the Data Processing while Exchanging the Bridge Arm Resistance

对电桥灵敏度及自组惠斯登电桥换臂测量的数据处理进行了探讨。指出换臂前后电桥的灵敏度发生了变化,换臂前后两个测量结果的可置信度不同,两次测量结果应被认定为非等精度测量值,其合成方法应遵循非等精度测量值合成法则。

The conception of electric bridge sensitivity and the data processing method in the Wheatstone-Bridge experiment are introduced in this paper.It is pointed that the electric bridge sensitivity changes when exchanging the bridge arm resistance.The two measure results from exchang-ing the arm resistance have different confidence,and they should be identified with the unequal precision measurement values.The synthesizing method should follow the unequal precision measurement values principle.