对直流电桥测量小电阻的分析

Analysis of the Use Direct Current Bridge to Measure Small Resistance

直流电桥是一种比较式仪表,在测量时根据被测量与已知量进行比较而得到测量结果。本文主要讨论用直流电桥测量阻值较小的电阻时,连接导线电阻或接线端的接触电阻对测量结果将产生的误差,以及减小误差的方法。

The direct current bridge is a kind of comparing instrument. The results can be measured by way of comparing an unknown quantity with a known quantity. In the article, the error resulting from resistance of connective wire or terminals and the method to reduce it during the detecting of comparatively small resistance value by way of direct current bridge are discussed.