Application of Phase-shifting Method using Fourier Transform to Measurement of In-plane Displacement by Speckle Interferometry

被引：0
|
作者：
Kim, Myung Soo [1 ]
Baek, Tae Hyun [2 ]
Morimoto, Yoshiharu [3 ]
Fujigaki, Motoharu [3 ]
机构：
[1] Kunsan Natl Univ, Sch Elect & Informat Engn, Gunsan, South Korea
[2] Kunsan Natl Univ, Sch Mech Engn, Gunsan City 573701, Jeonbuk, South Korea
[3] Wakayama Univ, Fac Syst Engn, Dept Optomechatron, Wakayama 640, Japan
来源：
JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING | 2005年 / 25卷 / 03期
关键词：
speckle interferometry; phase shifts; Fourier transform; fringe analysis;
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Phase-shifting method using Fourier transform (PSM/FT) has been applied to measurement of in-plane displacement of a specimen. Thirty-two interference fringe patterns each of which has different phase of pi/16 radian have been gathered from a specimen with in-plane displacement. Low-pass filtering by 2-D Fourier transform is used to suppress spatial noise of the fringe patterns. alpha-directional Fourier transform for PSM/FT is performed by use of the low-pass filtered 32 fringe patterns. Two kinds of specimens are used for experiment. One is a rectangular steel plate and the other one is a rectangular steel plate containing a circular hole at the center. In-plane displacement of each specimen is measured by PSM/FT, and calculated by finite element method (ANSYS) for comparison. The results are quite comparable, so that PSM/FT can be applied to measurement of in-plane displacement.
引用
收藏
页码：171 / 177
页数：7
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