[1]Mohammed Mokhtar Eisa,邵新星,钱帅宇,等.基于自标定数字图像相关技术的榫卯构件大面积全场变形测量[J].东南大学学报(自然科学版),2018,48(2):337-341.[doi:10.3969/j.issn.1001-0505.2018.02.023]
　Mohammed Mokhtar Eisa,Shao Xinxing,Qian Shuaiyu Wang Wenbo,et al.Large-area full-field deformation measurement of mortise-tenon structures based on self-calibration digital image correlation technology[J].Journal of Southeast University (Natural Science Edition),2018,48(2):337-341.[doi:10.3969/j.issn.1001-0505.2018.02.023]
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基于自标定数字图像相关技术的榫卯构件大面积全场变形测量()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第2期
页码:
337-341
栏目:
信息与通信工程
出版日期:
2018-03-20

文章信息/Info

Title:
Large-area full-field deformation measurement of mortise-tenon structures based on self-calibration digital image correlation technology
作者:
Mohammed Mokhtar Eisa1; 邵新星1; 钱帅宇1; 王文波2; 邱洪兴2; 何小元1
1东南大学土木工程学院, 南京 210096; 2东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096
Author(s):
Mohammed Mokhtar Eisa1 ;  Shao Xinxing1 ;  Qian Shuaiyu1 Wang Wenbo2;  Qiu Hongxing2 ;  He Xiaoyuan1
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
测量;  数字图像相关;  自标定;  榫卯构件
Keywords:
measurement;  digital image correlation;  self-calibration;  mortise-tenon structures
分类号:
TN911.74
DOI:
10.3969/j.issn.1001-0505.2018.02.023
摘要:
为了实现榫卯构件大面积全场变形测量,采用散斑自标定方法对三维数字图像相关测量系统进行标定.该方法直接利用被测表面的散斑信息标定得到三维数字图像相关系统中2个相机的相对姿态,无需使用特制的平面标定板.对比测量实验结果表明,普通三维数字图像相关系统与自标定三维数字图像相关系统的面内位移测量相对误差分别为0.2%和0.3%,离面位移测量相对误差分别为0.5%和0.6%,两者精度基本一致.采用散斑自标定方法可使大视场、远距离条件下双目系统标定更加灵活可行.将所提方法应用于木结构榫卯构件的大面积变形测量,可以更加方便可靠地获得构件的变形分布、掌握构件破坏过程中的变形情况.
Abstract:
To realize large-area full-field deformation measurement of mortise-tenon structures, a speckle-based self-calibration method was used to calibrate the three-dimensional(3D)digital image correlation(DIC)system. The speckle patterns on the surfaces of specimens were directly used to calibrate the relative posture of two cameras in the 3D-DIC system without the planar calibration board. The contrastive measurement experimental results show that the in-plane displacement measurement relative errors of the traditional 3D-DIC system and the speckle-based self-calibration 3D-DIC system are 0.2% and 0.3%, respectively, and the out-of-plane displacement measurement relative errors of the traditional 3D-DIC system and the speckle-based self-calibration 3D-DIC system are 0.5% and 0.6%, respectively. The accuracy of these two 3D-DIC systems are almost the same. The speckle-based self-calibration method can make the stereo calibration of binocular systems more flexible under the conditions of large field of view and long working distance situations. The application of the proposed method on the large-area full-field deformation measurement of wooden mortise-tenon structures can conveniently and reliablely obtain the deformation distribution of the members and understand the deformation in the process of component failure.

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备注/Memo

备注/Memo:
收稿日期: 2017-09-06.
作者简介: Mohammed Mokhtar Eisa(1981—),男,博士生;何小元(联系人),男,博士,教授,博士生导师,mmhxy@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(11327201, 11532005).
引用本文: Mohammed Mokhtar Eisa, 邵新星, 钱帅宇,等.基于自标定数字图像相关技术的榫卯构件大面积全场变形测量337-341. DOI:10.3969/j.issn.1001-0505.2018.02.023.
更新日期/Last Update: 2018-03-20