基于labview8.6的FFT法测量低信噪比条件下两路方波信号的相位差，经测试，幅值测量精度和相位测量精度都很高-Based labview8.6 FFT method to measure the phase difference between the two square wave signals in low signal-to-noise ratio conditions, test, amplitude measurement accuracy and phase measurem

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.

正弦函数的自相关函数是与初相位无关的余弦函数。余弦函数的周期与正弦函数的周期相同。周期信号的自相关函数仍然是同频率的周期信号，但不保留原信号的相位信息，并且在τ=0时的自相关函数为自相关函数最大值。-The autocorrelation function of the sine function is the cosine function of the initial phase. The cosine function is the same as the period of the si

基于labview的互相关法测量相位差计的设计，软件压缩包，可自行下载调试(LabVIEW correlation design method based on phase difference measurement)