影响惠斯通电桥灵敏度的几个因素  

Several Factors Affecting Sensitivity of Wheatstone Bridge

作　　者：郑冕[1] 李亮[1] 

机构地区：[1]辽宁工业大学理学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2018年第1期68-70,共3页Journal of Liaoning University of Technology(Natural Science Edition)

摘　　要：通过求解基尔霍夫方程组得出惠斯通电桥灵敏度与电桥相关参量之间的理论关系,并用实验方法研究这种电桥灵敏度随相关参量的变化关系。理论和实验结果都表明,电桥灵敏度随电源电压线性增加,随检流计量程增大而增大,随比率臂上电阻阻值增加而减小,理论结果和实验结果符合较好。此外检流计内阻和电桥比率也对灵敏度有较大影响。Via solving the Kirchhoff＇s equation set,a theoretical formula is obtained which could be used to analyze the relation between the sensitivity of Wheatstone bridge and the corresponding parameters of the bridge.Furthermore,the corresponding experimental value of the bridge sensitivity is obtained by experiments,which is found consistent with the theoretical result.And both the theoretical and the experimental results indicate that the bridge sensitivity is proportional to the power supply and increases with the measure range of galvanometer.In addition,the internal resistance of galvanometer,the ratio and the resistance of the bridge ratio arms all have a significant impact on the sensitivity of the Wheatstone bridge.

关 键 词：惠斯通电桥 灵敏度 电阻 基尔霍夫方程组 

分 类 号：O4-33[理学—物理]