大学物理 ›› 2024, Vol. 43 ›› Issue (7): 37-.doi: 10.16854/j.cnki.1000-0712.230264

• 物理实验 • 上一篇    下一篇

通过LabVIEW 虚拟仪器技术研究随机误差的正态分布

赵晓红,王世红   

  1. 北京邮电大学 理学院,北京100876
  • 收稿日期:2023-07-17 修回日期:2023-10-27 出版日期:2024-08-15 发布日期:2024-09-19
  • 作者简介:赵晓红(1964—),女,河北保定人,北京邮电学院理学院教授,博士,主要从事激光物理及物理实验教学方面的研究.
  • 基金资助:
    北京邮电大学教学改革项目(2023YB29)

Investigation of the normal distribution of random errors by labVIEW virtual instrument technique

ZHAO Xiao-hong, WANG Shi-hong   

  1. School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2023-07-17 Revised:2023-10-27 Online:2024-08-15 Published:2024-09-19

摘要: 本文以虚拟仪器技术LabVIEW为软件平台,结合NI-USB6009数据采集卡,对直流电压和信号发生器的正弦波信号分别进行测量和数据采集,对直流电压及正弦信号频率和幅值的测量结果进行统计研究,得到电压、正弦信号频率和幅值的统计结果为正态分布. 对周期信号增加单个周期的采样数,可以减小频率测量的标准差,提高频率测量的准确度. 该实验可以对学生开设为通过实际测量研究随机误差的正态分布规律的实验.

关键词: 正态分布, 虚拟仪器, LabVIEW开发平台, 数据处理

Abstract:  In this paper, the virtual instrument technology LabVIEW as a software platform, combined with NI-USB6009 data acquisition card is used to measure DC voltage and both the amplitude and the frequency of sine wave of the signal generator. The statistical result of the measurement shows the normal distribution. For the periodic signal, increasing of sampling quantity per period can reduce the standard deviation of the frequency, and can cause improving the accuracy of frequency measurement. This experiment can be designed for students to study the normal distribution law of random error through practical measurement.

Key words: normal distribution, virtual instrument, LabVIEW development platform, data processing