Using Fast Fourier Transform (FFT) algorithm and relevant functional operation, and based on LabVIEW platform, 2 simulated programs are designed to measure the phase difference of periodic signals.

• 利用快速傅里叶变换(FFT)算法和相关函数算法,基于LabVIEW平台,设计了2个测量周期信号相位差的仿真程序。