Study on in-plane displacement measurement under impact loading using digital speckle pattern interferometry

被引：16
|
作者：
Tong, JW
Zhang, DS
Li, HQ
Li, LN
机构：
[1] Tianjin University, Department of Mechanics
[2] Mechanics Department, Tianjin University
[3] Dept. of Astronautical Technology, Natl. Univ. of Defence Technology
来源：
OPTICAL ENGINEERING | 1996年 / 35卷 / 04期
关键词：
digital speckle pattern interferometry; impact loading; instantaneous digital image capturing system; ruby laser;
D O I：
10.1117/1.600787
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A technique for measuring in-plane displacement under impact loading using digital speckle pattern interferometry (DSPI) is presented. To capture the speckle field produced by a ruby laser, an instantaneous digital image capturing system is proposed. Thus the dynamic speckle images can be recorded and stored in a digital frame store and the quality of speckle fringe patterns is improved using digital subtraction. As an example, the displacement field of a semi-infinite model under impact loading is measured. The results show agreement with those of the finite element method. (C) 1996 Society of Photo-Optical Instrumentation Engineers.
引用
收藏
页码：1080 / 1083
页数：4
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