基于时间法的虚拟相位差计的设计

虚拟仪器技术就是利用高性能的模块化硬件，结合高效灵活的软件来完成各种测试、测量和自动化的应用。灵活高效的软件能够创建完全自定义的用户界面，模块化的硬件能方便地提供全方位的系统集成，标准的软硬件平台能满足对同步和定时应用的需求。介绍了基于时间法的虚拟相位差计的设计与实现。该虚拟相位差计是基于图形化编程语言LabVIEW开发的，运用了两种设计方案实现。具有执行数据采集、显示、周期和相位差的计算等功能。仿真结果证明虚拟相位差计可以准确的测量出不同信号的相位差。

Design of Virtual Phase Meter Based on the Time Method Measurement Principle

The virtual instrument technology is to achieve survey, measurement and automatic application by using the high performance, modularized hardware and the higheffective software The software can help to found a completely user-defined interface, the modularized hardware can provide system integration in all aspects conveniently, the standard software and hardware plat form can meet the need of synchronization and fixed time application. In this article the design and the realization of virtual phase meter based on the time method is introduced. This virtual phase meter is developed based on the graphic programming language LabVIEW, and is realized hy utilizing two kinds of design proposals It processes functions of data acquisition, display, computation of periodicity and phase difference, and so on. The simulation result show that the virtual phase meter can measure the phase difference of different signal accurately.