Two-scale digital speckle technique for measurement of complicated strain field

Author

Guohua Zhao ; Qinglian Shu ; Min Shen ; Zhiyong Wang

Author_Institution

Sch. of Civil Eng., Univ. of Jinan, Jinan, China

Volume

6

fYear

2010

fDate

16-18 Oct. 2010

Firstpage

2880

Lastpage

2884

Abstract

This paper suggests a two-scale DSCM (digital speckle correlation method) for measurement of complicated strain field. The main idea of the method is to use CCD lenses with different magnifications to capture different scale speckle images: the large-scale images can be used to measure the full field of strain and find the strain concentration area (SCA), but the strain values of the SCA may be in bad precision. So the small-scale images are specified to measure the strain distribution in SCA and can obtain more precise result. The two-scale DSCM is a good solution to the measurement of complicated strain field.

Keywords

CCD image sensors; optical correlation; optical images; photographic lenses; speckle; strain measurement; CCD lenses; complicated strain field measurement; large-scale speckle images; small-scale images; strain concentration area; two-scale digital speckle correlation method; Correlation; Digital images; Finite element methods; Lenses; Speckle; Strain; Strain measurement; DSCM; complicated strain field; strain concentration; two-scale DSCM;

fLanguage

English

Publisher

ieee

Conference_Titel

Image and Signal Processing (CISP), 2010 3rd International Congress on

Conference_Location

Yantai

Print_ISBN

978-1-4244-6513-2

Type

conf

DOI

10.1109/CISP.2010.5646876

Filename

5646876