Document Detail


Analysis of photonic Doppler velocimetry data based on the continuous wavelet transform.
MedLine Citation:
PMID:  21361569     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The short time Fourier transform (STFT) cannot resolve rapid velocity changes in most photonic Doppler velocimetry (PDV) data. A practical analysis method based on the continuous wavelet transform (CWT) was presented to overcome this difficulty. The adaptability of the wavelet family predicates that the continuous wavelet transform uses an adaptive time window to estimate the instantaneous frequency of signals. The local frequencies of signal are accurately determined by finding the ridge in the spectrogram of the CWT and then are converted to target velocity according to the Doppler effects. A performance comparison between the CWT and STFT is demonstrated by a plate-impact experiment data. The results illustrate that the new method is automatic and adequate for analysis of PDV data.
Authors:
Shouxian Liu; Detian Wang; Tao Li; Guanghua Chen; Zeren Li; Qixian Peng
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Review of scientific instruments     Volume:  82     ISSN:  1089-7623     ISO Abbreviation:  Rev Sci Instrum     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-03-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0405571     Medline TA:  Rev Sci Instrum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  023103     Citation Subset:  IM    
Affiliation:
Institute of Fluid Physics, China Academy of Engineering Physics, P.O. Box 919-109, Mianyang, Sichuan 621900, People's Republic of China.
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