THE PHOTONICAL, PURE GRID METHOD

被引：18

作者：

SEVENHUIJSEN, PJ

机构：

[1] National Aerospace Laboratory NLR, 1006 BM Amsterdam

来源：

OPTICS AND LASERS IN ENGINEERING | 1993年 / 18卷 / 03期

关键词：

Image analysis - Image processing - Image recording - Imaging techniques - Strain measurement;

D O I：

10.1016/0143-8166(93)90026-H

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The paper presents an introduction on the pure grid method for deformation measurements in experimental mechanics. The pure grid method involves that the grid images are processed separately, and subsequently the results of these separate processings are substrated from each other in order to obtain a quantified deformation indication. The recording and processing of the grid images are currently performed photonically by means of digital image measurement systems. The basic data processing relations and set-ups of four different applicabilities of the photonical, pure grid method are presented in this paper. The applicabilities are discussed. Strains can be measured with errors smaller than 200 micro strain and displacements with errors smaller than 1/5000 of the diameter of the object as visible in the grid image. These figures can be improved substantially by future application of high resolving-power CCD cameras. Two examples are shown. The paper also contains an extensive bibliography for further explorations.

引用

页码：173 / 194

页数：22