ACOUSTIC VELOCITY MEASUREMENTS IN THE AIR BY MEANS OF LASER DOPPLER VELOCIMETRY: DYNAMIC AND FREQUENCY RANGE LIMITATIONS AND SIGNAL PROCESSING IMPROVEMENTS

2000 ◽  
Vol 229 (3) ◽  
pp. 607-626 ◽  
Author(s):  
J.C. VALIÈRE ◽  
P. HERZOG ◽  
V. VALEAU ◽  
G. TOURNOIS
Keyword(s):  
Signal Processing ◽  
Laser Doppler Velocimetry ◽  
Acoustic Velocity ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Frequency Range ◽  
Velocity Measurements

Laser Doppler Velocimetry Signal Processing Based on Spectral Refinement and Correction

2011 ◽  
Vol 383-390 ◽  
pp. 6319-6323
Author(s):  
Nian Long Song ◽  
Da Zhang ◽  
Qi Li
Keyword(s):  
Signal Processing ◽  
Laser Doppler Velocimetry ◽  
Operation Time ◽  
Laser Doppler ◽  
Doppler Signal ◽  
Doppler Velocimetry ◽  
Basic Principles ◽  
Doppler Signals ◽  
Sinusoidal Signals ◽  
Ratio Correction

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.

Study on Multi-Point Velocity Measurements of Laser Doppler Velocimetry Based on Dual-Core Photonic Crystal Fiber

2015 ◽  
Vol 35 (11) ◽  
pp. 1112003
Author(s):  
黄雪峰 Huang Xuefeng ◽  
赵冠军 Zhao Guanjun ◽  
李盛姬 Li Shengji ◽  
郭枫 Guo Feng ◽  
郑光华 Zheng Guanghua ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Velocity Measurements ◽  
Crystal Fiber ◽  
Point Velocity ◽  
Dual Core
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