Effect of surface reflectivity on photonic Doppler velocimetry measurement

IMECH-IR > 流固耦合系统力学重点实验室

	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)
发表期刊	Measurement Science and Technology
	2014
卷号	25 页码:055207
ISSN	0957-0233
摘要	While 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.
关键词	Onic Doppler Velocimetry Surface Reflectivity Back Free Surface Velocity Multiple Doppler Shifts
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收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000334352000025
项目资助者	This 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).
课题组名称	LMFS冲击与耦合效应(LHO)
论文分区	二类/Q2
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/48825
专题	流固耦合系统力学重点实验室
通讯作者	Huang CG(黄晨光)
推荐引用方式 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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