基于ＬａｂＶＩＥＷ的虚拟仿真实验———惠斯通电桥测电阻

doi:10.14139/j.cnki.cn22-1228.2022.05.020

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摘要

用ＬａｂＶＩＥＷ２０２０软件成功实现了《惠斯通电桥测电阻》实验的虚拟仿真。从基本物理原理出发，构建了电桥电路的程序框图，设计出简明的仿真实验前面板，满足了用户通过虚拟仿真界面完成整个测量过程的需求。在仿真实验中，待测电阻Ｒｘ在１～１０００Ω 范围内显示出连续可调、明确的理论值，比率臂Ｒ１／Ｒ２在０．００１～１０００范围内连续可调，比较臂Ｒ０在０～９９９９．９９Ω 范围内通过六位十进制电阻箱可调。多次仿真实验数据发现，所测电阻的相对误差均在１．０％以下，表现出较高的精确度。该仿真实验能对电桥灵敏度进行有效的测量，设计方法是非常成功的，可推广到其他电学实验的虚拟仿真应用中。

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关键词: 比率臂比较臂电桥平衡电桥灵敏度虚拟仿真

Abstract:

For the experiment of measuring resistance with Wheatstone bridge, the virtual simulation jssuccessfully realized by using the LabVIEW2020 software.Based on the basic physical principles ,the programblock diagram of the bridge circuit is constructed and the intuitive panel of the experiment is designed ,to meetthe needs of users to complete the whole measurement process through the virtual simulation interface.In thesimulation experiment,the resistance R. shows a continuously adjustable and definite theoretical value in therange of l~1 000 2,the ratio arm R,/R, is continuously adjustable in the range of 0.001 1 000.and thecomparison arm R, is adjustable in the range of 0~9 999.99 through a six-digit decimal resistance box.Theresults of several simulation experiments show that the relative errors of the resistance R. are all below 1.0%showing a high accuracy.The simulation experiment can effectively measure the sensitivity of the bridge,andthe design method is very successful, which can be extended to virtual simulation applications of other electricalexperiments.

Key words: ratio arm comparison arm bridge balance bridge sensitivity virtual simulation

出版日期: 2022-10-25 发布日期: 2022-10-25 整期出版日期: 2022-10-25

ZTFLH:

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引用本文:

何学敏 , 邢家林 , 张丁源 , 顾起彰 , 毛巍威 . 基于ＬａｂＶＩＥＷ的虚拟仿真实验———惠斯通电桥测电阻 [J]. 大学物理实验, 2022, 35(5): 92-95.
HE Xuemin'XING Jialin’ZHANG Dingyuan’, GU Qizhang, MAO Weiwei. Virtual Simulation Experiment Based on LabVIEW-Use the Wheatstone Bridge to Measure Resistance . Physical Experiment of College, 2022, 35(5): 92-95.

链接本文:

http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2022.05.020 或 http://dawushiyan.jlict.edu.cn/CN/Y2022/V35/I5/92

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