DocumentCode :
657326
Title :
A comparison of techniques for extracting transverse speed from photon Doppler velocimetry signal content
Author :
Moro, Erik A. ; Briggs, Matthew E. ; Hull, L.M.
Author_Institution :
WX-Div., Los Alamos Nat. Lab., Los Alamos, NM, USA
fYear :
2013
fDate :
3-6 Nov. 2013
Firstpage :
1
Lastpage :
4
Abstract :
We recently demonstrated that a single optical probe is capable of simultaneously measuring a surface´s velocity along the beam axis and its speed transverse to the beam axis. Doppler shifts in the measured data are related to axial motion, while intensity fluctuations, induced by speckle dynamics, are related to transverse motion. While it is readily apparent that speckle dynamics manifest themselves in the measured data, the ability to extract transverse speed from a particular (speckle-induced) signal feature is feature-dependent. In this paper, we relate a signal´s coherence, variance, and frequency content to surface dynamics, in an effort to determine the suitability of each of these features for calculating transverse motion (classification release number: LA-UR 13-26315).
Keywords :
Doppler measurement; spatial variables measurement; Doppler shifts; LA-UR 13-26315; beam axis; classification release number; frequency content; intensity fluctuations; photon Doppler velocimetry signal content; signal coherence; signal variance; single optical probe; speckle dynamics; surface dynamics; surface velocity; transverse motion; transverse speed; Coherence; Correlation; Laser beams; Measurement by laser beam; Probes; Speckle; Velocity measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
SENSORS, 2013 IEEE
Conference_Location :
Baltimore, MD
ISSN :
1930-0395
Type :
conf
DOI :
10.1109/ICSENS.2013.6688616
Filename :
6688616
Link To Document :
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