光学技术, 2010, 36 (4): 525, 网络出版: 2011-02-21
基于数字图像相关的透明材料厚度测量
Thickness measurement of transparent material by digital image correlation method
摘要
提出了一种测定透明材料厚度的新方法。该方法是基于透明材料对光的折射特点, 利用光斑点面内位移与材料厚度的变化关系, 将厚度的测量转化为对面内位移的测量。将此方法与数字图像相关法相结合, 实现了单摄像机对厚度的测定。对轴向拉伸状态下的有机玻璃板的厚度变化进行了测定, 将实验结果与理论值进行了对比, 两者符合较好, 证明了该实验方法的有效性和可行性。
Abstract
A new method based on the principle of light refraction is presented, and a system based on a single CCD camera and digital image correlation method is developed. The relationship between the in-plane displacement of speckle and the thickness change of specimen is provided. The thickness of transparent plexiglass plate under axial tensile load is obtained by measuring the y-direction in-plane displacement. The experimental results are well consistent with the theoretical value. The results reveal that the new method is suitable for thickness measurement of transparent material.
代祥俊, 云海, 蒲琪. 基于数字图像相关的透明材料厚度测量[J]. 光学技术, 2010, 36(4): 525. DAI Xiang-jun, YUN Hai, Pu Qi. Thickness measurement of transparent material by digital image correlation method[J]. Optical Technique, 2010, 36(4): 525.