交流电桥测量精度和灵敏度的分析研究

Analysis of Measurement Accuracy and Sensitivity of Alternating Current Bridge

在大学普通物理实验中,利用交流电桥测量电容器的电容量和线圈的电感量。为使测量结果比较准确,要求电桥同时具有较高的测量精度和电桥灵敏度。本文以电容电桥为例,理论分析影响交流电桥灵敏度的因素,并通过实验探究如何在保证高测量精度的同时,提高电桥灵敏度。

In General Physics Experiment,the alternating current bridge is arranged to make students study and measure the capacitance of capacitor and the inductance of coil.In order to make the measurement results more accuracy,the bridge is required to have high measurement accuracy and sensitivity.We have theoretically analyzed the factors of influencing the sensitivity of the bridge by taking the capacity bridge as an example.Based on this,we have experimentally investigated how to achieve high measurement accuracy,meanwhile keeping the high sensitivity of bridge.