傅中君,王建宇,周根元,陈鉴富,欧云.基于初相和谐波理论的相位差测量方法[J].电测与仪表,2015,52(23):. FU Zhongjun,WANG Jianyu,ZHOU Genyuan,CHEN Jianfu,OU Yun.A Method for Phase Difference Measurement Based on Initial Phase and Harmonic Theory[J].Electrical Measurement & Instrumentation,2015,52(23):.
基于初相和谐波理论的相位差测量方法
A Method for Phase Difference Measurement Based on Initial Phase and Harmonic Theory
As we all know, the phase difference of two same frequency periodic signals equals to their initial-phase difference. For this reason, we give an initial-phase calculation method (IPCM) which is based on Harmonic Superposition Theory and the Newton Iteration Algorithm. The Non-integer Phase Difference Measurement (NI-PDM) method by initial-phase is as follows: (1) Synchronous sampling the waveform data of two periodic signals; (2) Getting high-precision amplitude and phase of each harmonic by using the non-integer harmonic analysis algorithm (NI-DFT); (3) Calculating initial-phase respectively by IPCM; (4) Calculating phase difference. Simulation results show that this method has a wide range of signal frequency drift and a high-precision, and can be used to measure the phase difference of waveform which meet the Diliheli conditions.
