|Table of Contents|

Crack localization and tracking in concrete structures based on 3D point cloud reconstruction(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年05期
Page:
14-22
Research Field:
建筑结构
Publishing date:

Info

Title:
Crack localization and tracking in concrete structures based on 3D point cloud reconstruction
Author(s):
ZHOU Shukang1;  DING Wei1;  JIN Zhenfen2; 3;  YU Ke4;  ZHANG He1;  SHU Jiangpeng1; 2; 3
(1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China; 2. Center for Balance Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China; 3. The Architecture Design & Research Institution of Zhejiang University Co., Ltd, Hangzhou 310058, Zhejiang, China; 4. Civil and Environmental Engineering Department, Northwestern University, Evanston IL60208, Illinois, USA)
Keywords:
crack localization;  width quantization;  crack propagation tracking;  3D point cloud reconstruction;  viewpoint localization;  point cloud mapping
PACS:
TU37
DOI:
10.19815/j.jace.2022.10119
Abstract:
In order to realize automatic crack localization, width quantification, and extension tracking in concrete structure, a methodology for crack localization and tracking in concrete structures based on three-dimensional(3D)point cloud reconstruction was proposed. Firstly, the image set of the target building was obtained by an unmanned aerial vehicle(UAV)equipped with a high-resolution gimbal camera. Image acquisition and 3D reconstruction process were optimized to obtain an accurate point cloud model of the building structure and restore the camera space parameters. Secondly, the viewpoint localization algorithm was proposed to obtain the camera world coordinates of the cracks based on the restored camera space parameters. After binding the crack images to the world coordinates of cameras, the 3D coordinates of the crack were indexed based on the image to realize the automatic localization of the crack in the point cloud model. Finally, point cloud mapping and the registration algorithm for concrete structures was proposed to quantitatively track the propagation of crack width. The feasibility and accuracy of the large concrete building structure in service period were verified by experiments. The results show that the average scale error of 3D model reconstruction by the method is less than 3%, and the 3D coordinates of structure cracks can be automatically located. The average localization time of cracks is 38.09 μs, and by further registering the whole model with the updated crack point cloud set, the accurate tracking of crack propagation information(crack width)can be realized, and the test relative error is less than 8%.

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Last Update: 2024-09-30