介绍了希尔伯特(Hilbert)变换测量相位差和数字相关法测量相位差的原理，进行了比较研究和试验分析，讨论了各自使用效果、优缺点及其适用的场合。结果表明，在动态检测方面，利用Hilbert变换法更能对两路同频信号的相位差进行有效的检测，是今后的研究方向。

The phase difference measuring principles of using Hilbert transform and digital correlation method are introduced, and the comparative research and experimental analysis are carried out based on their principles. Moreover, their respective application field and effectiveness, advantages and disadvantages are discussed. The results show utilizing Hilbert transform to measure the phase difference of two signals with the same frequency is more effective in dynamic testing, and is a research direction in the future.