Full-field Measurement of Topography and Curvature by Coherent Gradient Sensing Method at High Temperature

被引：11
|
作者：
Dong, X. [1 ]
Zhang, C. [1 ]
Feng, X. [1 ]
Hwang, K. -C. [1 ]
机构：
[1] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China
来源：
EXPERIMENTAL MECHANICS | 2013年 / 53卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Coherent gradient sensing; High temperature; Full-field measurement; THIN FILM/SUBSTRATE SYSTEMS; DISTRIBUTIONS; FORMULA; FILMS;
D O I：
10.1007/s11340-013-9713-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Coherent gradient sensing (CGS) method, a real time, full-field optical technique, is insensitive to vibrations and able to provide slope and curvature maps and surface topographies, to investigate non-uniform deformations. In this paper, we analyze the thermal effects on the optical path in CGS due to air convection, and the influence of grating thickness and refractive index on the measurement accuracy. A modified governing equation is derived considering the grating thickness, which is demonstrated by testing a standard sample. Finally, we apply CGS method to measure the full-field deformation of a specimen at high temperature.
引用
收藏
页码：959 / 963
页数：5
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