基于锁相环的相位差测量仪

Phase Difference Measuring Instrument based on Phase-locked Loop

相位差的测量是研究网络相频特性的一个重要方面。如何快速准确地测量出相位差也是生产科研中重要的研究课题。开发了一种基于锁相环的相位测量原理而设计的虚拟相位差测量仪,并给出了该系统对数据采集设备的主要要求。实验结果表明,采用这种方法后,其相位差测量准确度小于0.01°,完全可以满足目前工业现场对相位差测量的要求。

It＇s an important factor to measure phase difference for studying phase frequency characteristics of the network. How to measure phase difference quickly is a main research topic on scientific research in production, A virtual phase difference meter is developed based on the principle of phase difference measurement of phase-locked loop, and the main requirements for data acquisition device are given, The experimental results show that the phase difference accuracy is less than 0.01 degree. which can meet the requirement of industrial fields.