基于谱分析法的相位差计，仪器内集成周期测量仪（基本原理是计数法）-Based on spectral analysis of the phase difference meter, instrument integration cycle measuring instrument (the basic principle is counting method)

基于LabVIEW设计了相位差的检测程序，采用相关法、过零法、FFT法、频谱分析法四种方法，适合毕业设计。-LabVIEW design phase of the testing procedures, the use of correlation, zero-crossing method, FFT method, spectral analysis of four methods for graduation design.