基于LabVIEW的虚拟仿真实验——惠斯通电桥测电阻  

Virtual Simulation Experiment Based on LabVIEW——Use the Wheatstone Bridge to Measure Resistance

作　　者：何学敏[1] 邢家林 张丁源 顾起彰 毛巍威[1] HE Xuemin;XING Jialin;ZHANG Dingyuan;GU Qizhang;MAO Weiwei(School of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;School of Communications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学理学院,江苏南京210023 [2]南京邮电大学通信与信息工程学院,江苏南京210023

出　　处：《大学物理实验》2022年第5期92-95,共4页Physical Experiment of College

基　　金：南京邮电大学实验室工作研究课题(2020XSG12)。

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R x在1~1000Ω范围内显示出连续可调、明确的理论值,比率臂R_(1)/R_(2)在0.001~1000范围内连续可调,比较臂R_(0)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。For the experiment of measuring resistance with Wheatstone bridge,the virtual simulation is successfully realized by using the LabVIEW2020 software.Based on the basic physical principles,the program block diagram of the bridge circuit is constructed and the intuitive panel of the experiment is designed,to meet the needs of users to complete the whole measurement process through the virtual simulation interface.In the simulation experiment,the resistance R x shows a continuously adjustable and definite theoretical value in the range of 1~1000Ω,the ratio arm R_(1)/R_(2) is continuously adjustable in the range of 0.001~1000,and the comparison arm R_(0) is adjustable in the range of 0~9999.99Ωthrough a six-digit decimal resistance box.The results of several simulation experiments show that the relative errors of the resistance R x are all below 1.0%,showing a high accuracy.The simulation experiment can effectively measure the sensitivity of the bridge,and the design method is very successful,which can be extended to virtual simulation applications of other electrical experiments.

关 键 词：比率臂 比较臂 电桥平衡 电桥灵敏度 虚拟仿真 

分 类 号：O4-39[理学—物理]