基于虚拟仪器的相位测量算法研究

Research of the algorithm for phase difference measurement based on VI

将虚拟仪器技术用于信号的相位测量,介绍了两种基于虚拟仪器的相位测量算法:过零法和相关分析法。通过实验数据,分析了两种算法的误差。与传统的硬件电路相位测量方法相比,基于虚拟仪器的相位测量算法具有测量精度高,抗干扰能力强,电路组成简单等优点。

Virtual Instruments technology is applied in phase di ff erence measurement,in this paper two methods which are zero crossing and corre lation analysis are discussed.Using experiment data,we analyze the measuring error of two methods.Compared with traditional way,the algorithm for phase d ifference measurement based on VI has the ad-vantages of accuracte,speedy,a nti-jamming and brief circuit.