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Binocular vision measurement and its application in full-field convex deformation of concrete-filled steel tubular columns

机译：双目视觉测量及其在混凝土钢管柱全场凸变形中的应用

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摘要

This paper presents a non-contact 3D deformation measurement method based on binocular vision. The proposed method was tested in the determination of the deformation and strain of concrete-filled steel tubes. Based on the proposed image-processing algorithm and the principle of 3D deformation measurement, the least-square-based circle-fitting algorithm was presented in this article and was applied to binocular vision systems for the static and dynamic collection of full-field 3D deformation data in concrete-filled steel tubular columns. Three-dimensional reconstruction was performed, and the results obtained were compared with those of a contact measuring tool. The test results showed that the mean relative errors of the maximum convex diameter in the visual static and dynamic measurements were 0.19% and 0.33%, respectively, and the mean relative error in the full-field strain in the visual measurement was between 0.20% and 0.49%, which shows that the proposed visual method comprehensively reflects the deformation process and full-field strain values of the components under engineering ISO Tolerance (IT7) accuracy requirements. This method can be used as a reasonable alternative to traditional contact measuring methods. (C) 2018 Elsevier Ltd. All rights reserved.
机译：本文介绍了基于双目视觉的非接触式3D变形测量方法。在确定混凝土钢管的变形和菌株的测定中进行了所提出的方法。基于所提出的图像处理算法和3D变形测量的原理，本文提出了基于最小二乘的圆形拟合算法，并应用于静态和动态集合的双目视觉系统的静态和动态集合混凝土钢管柱中的数据。进行三维重建，并将获得的结果与接触测量工具的结果进行比较。测试结果表明，视觉静态和动态测量中最大凸直径的平均相对误差分别为0.19％和0.33％，视觉测量中全场应变中的平均相对误差在0.20％之间介于0.20％之间。 0.49％，表明所提出的视觉方法全面地反映了工程ISO公差（IT7）精度要求下的组件的变形过程和全场应变值。该方法可用作传统接触测量方法的合理替代品。 （c）2018年elestvier有限公司保留所有权利。

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  • 来源
    《Measurement》 |2018年第2018期|共12页
  • 作者

    Tang Yun-Chao; Li Li-Juan; Feng Wen-Xian; Liu Feng; Zou Xiang-Jun; Chen Min-You;

  • 作者单位

    Guangdong Univ Technol Sch Civil &

    Transportat Engn Guangzhou Guangdong Peoples R China;

    Guangdong Univ Technol Sch Civil &

    Transportat Engn Guangzhou Guangdong Peoples R China;

    Guangdong Univ Technol Sch Civil &

    Transportat Engn Guangzhou Guangdong Peoples R China;

    Guangdong Univ Technol Sch Civil &

    Transportat Engn Guangzhou Guangdong Peoples R China;

    South China Agr Univ Key Lab Key Technol Agr Machine &

    Equipment Minist Educ Guangzhou Guangdong Peoples R China;

    South China Agr Univ Key Lab Key Technol Agr Machine &

    Equipment Minist Educ Guangzhou Guangdong Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;
  • 关键词

    Non-contact measuring; Image processing; 3D reconstruction; Full-field strain; Convex curved deformation;

    机译：非接触式测量;图像处理;三维重建;全场菌株;凸弯曲变形;

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