自动测试系统中的虚拟示波器的研究与应用

Development & Application of Virtual Oscillosgraph in ATS

介绍了一种基于LabVIEW环境下开发的虚拟示波器的软件设计过程;重点介绍了示波器实时显示过程中的幅值和时基调整的方法,在保证实时性的前提下,对于大小时基显示分别提出了各自的处理算法;同时,简要介绍了波形的时频测量的基本思想:门槛电压法及其应用;并在此基础上,将其应用于现代电机闭环锁相调速系统,分析了参数测量在PID控制中的作用;实验结果表明,该虚拟示波器实时性能良好,对系统的闭环控制起到了很好的作用。

This paper introduces the design process of a virtual oscillograph based on LabVIEW. Mainly analyzes the amplitude value and time base adjusting methods during the real-time display. At the same time, it simply introduces the basic thought when measuring the period and frequency of the waveform-gate voltage method and its application. At the end of this paper, combining the parameter measurement and waveform display of the virtual oscillograph with the modern motor close- loop lock- phase speed control, it analyzes the parameter measurement＇ s effect in PID control.