A non-contact method to measure surface strain by means of laser speckles

被引：0
|
作者：
Kothbauer, R. [1 ]
Zagar, B. G. [1 ]
机构：
[1] Johannes Kepler Univ Linz, Inst Elekt Messtech, Osterreich Altenbergerstr 69, A-4040 Linz, Austria
来源：
ELEKTROTECHNIK UND INFORMATIONSTECHNIK | 2008年 / 125卷 / 03期
关键词：
Laser-speckles; non-contact strain measurement; geometrical deviations;
D O I：
10.1007/s00502-008-0511-6
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This article provides an overview of a certain non-contact method to measure surface strain. The theoretical background of this method is based on the cross-correlation of laser-speckle patterns, which are changing in an deterministic way due to loading the specimen. The method is usually used to determine thermal or mechanical material parameters. As an application the result of a Young's modulus measurement is shown. Furthermore, two different measurement set-ups are introduced, whose geometries display both simplicity and robustness.
引用
收藏
页码：92 / 97
页数：6
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