为了帮助学生进行线上物理实验课程的学习，同时实现实验操作的上机考试，在 LabVIEW平台上设计开发了“十一线电位差计测量电动势”的虚拟仿真实验软件，它完全仿真实际仪器，虚拟实验仪器的操作步骤与实验精度与教学使用的实验仪器一致，同时虚拟仪器配有操作提示和说明，帮助学生在电脑上进行实验原理和实验过程的预习和复习. 软件可完全脱离编程平台，可以在不需要预装软件的情况下在其他计算机上使用. 本文详述了虚拟仪器的设计方法和参数的选择依据，并提供了系统的编程框图.

In order to help students to learn physics experiment courses online and realize the

online examina- tion of experimental operation，virtual simulation experiment of measuring

electromotive force with eleven-wire po- tentiometer is designed and developed on LabVIEW

platform，which can fully simulate all functions of the actual in- strument. The operating steps and

experimental precision of the virtual simulation experiment software are consistent with those of

the experimental instrument used in our school. Meanwhile，the virtual instrument is also

equipped with operational tips and instructions，which can help students preview and review the

experimental principles and process on the computer. The packaged software can be completely

detached from the programming platform and be used on other computers without the need for

pre-installed software. The experimental principle，the design method of the virtual instrument

and the selection basis of the parameters are described in detail，and the programming

block diagram of the system is provided.