电压法和电流法惠斯通电桥灵敏阈的比较实验  

A Comparative Experiment on Sensitivity Threshold of Wheatstone Bridge Based on Voltage Balance and Current Balance

作　　者：王庆艳[1] 刘建龙[1] 赵海发[1] 乌大琨[1] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《大学物理实验》2015年第4期75-77,共3页Physical Experiment of College

摘　　要：针对惠斯通电桥实验分别采用电压平衡法和电流平衡法测量电阻并计算电桥灵敏度和灵敏阈。与传统的电流平衡法相比,利用电压测量法判断电桥是否平衡,同时选择合适的比例臂阻值,可以获得更小的灵敏阈。Moderate resistances are measured, as well as sensitivity and sensitivity threshold calculated, by u- sing voltage balance method and current balance method in Wheatstone Bridge Experiment. Compared with the traditional current method, smaller sensitivity threshold can be achieved by voltage method based on appropri- ate ratio arm resistance.

关 键 词：惠斯通电桥 电压平衡法 电流平衡法 灵敏阈 

分 类 号：TM13[电气工程—电工理论与新技术]