用基于种子点的三维图像相关法测量连续大变形

肖振中; 徐爱珠; 安顺泰; 唐正宗

doi:10.3788/OPE.20111909.2277

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用基于种子点的三维图像相关法测量连续大变形

光学精密工程暨纳米科技国际研讨会论文 | 更新时间：2020-08-12

- 用基于种子点的三维图像相关法测量连续大变形
- Measurement of large deformation by digital image correlation method based on seed points
- 光学精密工程 2011年19卷第9期页码：2277-2283
- 作者机构：
  
  1. 西安交通大学机械工程学院,陕西西安,710049
  2. 义安理工学院光学与激光研究中心新加坡,599489
  3. 南洋理工大学机械与宇航工程学院新加坡,639798
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China (Grant No.50975219)()
- DOI：10.3788/OPE.20111909.2277
  中图分类号： TP391.4
- 收稿日期：2011-03-08，
  
  修回日期：2011-04-30，
  
  网络出版日期：2011-09-26，
  
  纸质出版日期：2011-09-26
- 稿件说明：
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肖振中, 徐爱珠, 安顺泰, 唐正宗. 用基于种子点的三维图像相关法测量连续大变形[J]. 光学精密工程, 2011,19(9): 2277-2283

XIAO Zhen-zhong, Oichoo Chee, Anand Asundi, TANG Zheng-zong. Measurement of large deformation by digital image correlation method based on seed points[J]. Editorial Office of Optics and Precision Engineering, 2011,19(9): 2277-2283
肖振中, 徐爱珠, 安顺泰, 唐正宗. 用基于种子点的三维图像相关法测量连续大变形[J]. 光学精密工程, 2011,19(9): 2277-2283 DOI： 10.3788/OPE.20111909.2277.

XIAO Zhen-zhong, Oichoo Chee, Anand Asundi, TANG Zheng-zong. Measurement of large deformation by digital image correlation method based on seed points[J]. Editorial Office of Optics and Precision Engineering, 2011,19(9): 2277-2283 DOI： 10.3788/OPE.20111909.2277.

摘要

针对使用图像相关法测量物体发生的较大刚体旋转或变形容易失效的问题

提出了一种连续大变形的图像匹配方法。该方法首先利用相邻状态变形的连续性对种子点进行匹配

然后利用同一状态相邻点的变形连续性

通过种子点为其他点提供初值

并最终完成对所有点的匹配

从而在无需人工交互的情况下实现对大变形过程的高效测量。刚体旋转实验以及单向拉伸实验表明

对于 40的刚体旋转位移场以及高达113%的变形

测量结果良好

证明了本文方法的有效性。

Abstract

To solve the problem of a large deformation measurement by using the Digital Image Correlation (DIC) method

a DIC method based on seed points is presented. After dividing subsets in the reference image

one point is chosen as the seed point and is matched firstly. According to the deformation continuity of adjacent stages of the image

an improved integer pixel search method is proposed to guarantee that the seed point can be matched successfully even in a large deformation situation. Once the seed point is matched

it can be used to calculate the initial correlation parameters of its four neighbor points according to the deformation continuity of neighbor points in one stage. The above progress repeats until all the points are matched. A rigid rotation experiment and a tensile test are carried out to verify the proposed method. Measurement results for 40 rotation and large deformation up to 113% confirm the validity of the method.

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references

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