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Effect of surface reflectivity on photonic Doppler velocimetry measurement
Wu XQ(吴先前); Xia WG(夏伟光); Wang X(王曦); Song HW(宋宏伟); Huang CG(黄晨光); Huang CG(黄晨光)
Source PublicationMeasurement Science and Technology
AbstractWhile photonic Doppler velocimetry (PDV) is becoming a common diagnostic for tracking velocity in shock physical experiments, its validity on measuring surfaces with different reflectivity is not studied. This paper investigates the effects of surface reflectivity on PDV measurement for tracking back free surface velocity in laser shock processing. Credible measurement results for coarse polished surfaces with low reflectivity are obtained, whereas fine polished surfaces with relatively high reflectivity lead to heterodyne fringes with high frequency and corresponding unreasonably fast velocities. This phenomenon reported in the paper is somewhat inconsistent with the general view that PDV has remarkable robustness to large changes in surface reflectivity. The reason might be ascribed to multiple reflections of light, which cause the generation of multiple Doppler shifts. The mixing of the reference light and those Doppler-shifted lights brings out high frequency heterodyne fringes resulting in high velocity. Low surface reflectivity is better suited for PDV measurements.
KeywordOnic Doppler Velocimetry Surface Reflectivity Back Free Surface Velocity Multiple Doppler Shifts
Indexed BySCI ; EI
WOS IDWOS:000334352000025
Funding OrganizationThis work is funded by the Instrument Project of Chinese Academy of Sciences (CAS) (grant no. YZ200930); additional funding is also provided by the National Natural Science Foundation of China (NNSFC) (grant no 11332011).
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorHuang CG(黄晨光)
Recommended Citation
GB/T 7714
Wu XQ,Xia WG,Wang X,et al. Effect of surface reflectivity on photonic Doppler velocimetry measurement[J]. Measurement Science and Technology,2014,25:055207.
APA Wu XQ,Xia WG,Wang X,Song HW,Huang CG,&黄晨光.(2014).Effect of surface reflectivity on photonic Doppler velocimetry measurement.Measurement Science and Technology,25,055207.
MLA Wu XQ,et al."Effect of surface reflectivity on photonic Doppler velocimetry measurement".Measurement Science and Technology 25(2014):055207.
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