A New Method of Phase Measuring based on Hilbert and its Comparison with Digital Correlation Method

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.