虚拟仪器测量周期信号相位的程序设计

Programmes for Measuring Period Signal Phases on Virtual Instrument

为找寻一种精确的相位检测方法 ,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的程序 .仿真测量数据相对误差约为 0 .0 2 % ,精确程度较高 .

To work out a method of phase measuring, fast fourier transform(FFT) algorithm and correlation algorithm are used to design,two programmes measuring period signal phases which are based on LabVIEV.Experimental results show that the accuracy is raised and the relative errors of the measurment numbers are within 0.02%.