Bound Analysis of Signal Processing Method on Laser Doppler Velocity & Vibration Measurement

doi:10.16182/j.issn1004731x.joss.201805039

Abstract

Abstract: Laser Doppler measurement technology has attracted more and more attention and application in the field of high precision measurement. For different signal characteristics and processing methods, there are different constraints of the measurement, which would determine the measurement precision and accuracy. Based on the principle of laser Doppler velocity & vibration measurement and from the perspective of digital signal processing, the constrains related to the sampling rate, data length and time interval are analyzed. The time-interval homogenization processing method of the second sampling data, and the effect on the measurement range of aliasing about reference light frequency and signal sampling frequency with heterodyne measurement method are also respectively studied. Experimental results show that the algorithm can obtain accurate measurement results quickly and accurately in the inferred measurement range.

Key words: Doppler effect, measurement resolution, data interval homogenization, frequency aliasing

CLC Number:

Peng Xiang, Liu Bo. Bound Analysis of Signal Processing Method on Laser Doppler Velocity & Vibration Measurement[J]. Journal of System Simulation, 2018, 30(5): 1927-1934.

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