Laser Doppler Velocimetry Signal Processing Based on Spectral Refinement and Correction

Abstract:

In order to improve the accuracy of signal processing in Laser Doppler Velocimetry, a method based on the association of spectral refinement and correction is presented. Zoom-FFT and ratio correction are adopted to realize this method. Basic principles of zoom-FFT and ratio correction are expounded. FFT and the method are adopted to process sinusoidal signals and simulated laser Doppler signals with different frequencies separately in circumstance of MATLAB 7.0. Comparisons between the results of FFT and the method are carried out. The comparisons show that this method has the capability to improve the accuracy of laser Doppler signal processing significantly and the operation time is acceptable for LDV system.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 6319-6323
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.6319
• Online since: November 2011
• Authors: Nian Long Song, Da Zhang, Qi Li
• Keywords: Laser Doppler Velocimetry, Ratio Correction, Zoom-FFT

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