伏安法测电阻实验中量程转换对测量精度的影响  

Influence of Range Conversion on Measurement Accuracy in Measuring Resistance by Voltammetry

作　　者：梅诗雨 刘瑞琪 吴超浩 赵颖 MEI Shiyu;LIU Ruiqi;WU Chaohao;ZHAO Ying(Basic Experimental Center for Natural Science,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学自然科学基础实验中心,北京100083

出　　处：《大学物理实验》2022年第5期121-124,共4页Physical Experiment of College

基　　金：北京科技大学本科教育教学改革项目(JG2020M54);北京科技大学本科教育教学改革重点项目(JG2021Z07)。

摘　　要：在伏安法测电阻的实验中,测量电阻伏安特性曲线时需要多次测量。为了充分利用电流表的测量精度,需要转换电流表量程,但与此同时电流表的内阻也随之改变。如何考虑量程改变带来的误差是本实验的一个重要问题。文章通过引入分段修正函数对测量数据进行处理,从而自洽地考虑了量程转换时电流表内阻改变对数据处理的影响,使数据处理方法更加合理,所得结果更加精确。In the experiment of measuring resistance by voltammetry,it is usually to measure the voltammetric characteristic curve of resistance.In order to make full use of the measuring accuracy of the ammeter,it is usually necessary to change the ammeter range.However,the internal resistance of the ammeter also changes.How to consider the error caused by ammeter range change is an important problem in this experiment.A piecewise correction function is introduced to overcome this problem.Accordingly the influence of the change of ammeter resistance on the measurement accuracy is considered self-consistently,which makes the data processing method more reasonable.

关 键 词：伏安法测电阻 量程转换 分段修正函数 

分 类 号：O4-34[理学—物理]