刘宇飞, 樊健生, 孔思宇, 魏晓晨. 多视角几何三维重建法识别工程结构缺损与变形[J]. 工程力学, 2020, 37(9): 103-111. DOI: 10.6052/j.issn.1000-4750.2019.10.0598
引用本文: 刘宇飞, 樊健生, 孔思宇, 魏晓晨. 多视角几何三维重建法识别工程结构缺损与变形[J]. 工程力学, 2020, 37(9): 103-111. DOI: 10.6052/j.issn.1000-4750.2019.10.0598
LIU Yu-fei, FAN Jian-sheng, KONG Si-yu, WEI Xiao-chen. DETECTION OF STRUCTURAL DEFECT AND DEFORMATION BASED ON MULTI-VIEW GEOMETRIC THREE-DIMENSIONAL RECONSTRUCTION METHOD[J]. Engineering Mechanics, 2020, 37(9): 103-111. DOI: 10.6052/j.issn.1000-4750.2019.10.0598
Citation: LIU Yu-fei, FAN Jian-sheng, KONG Si-yu, WEI Xiao-chen. DETECTION OF STRUCTURAL DEFECT AND DEFORMATION BASED ON MULTI-VIEW GEOMETRIC THREE-DIMENSIONAL RECONSTRUCTION METHOD[J]. Engineering Mechanics, 2020, 37(9): 103-111. DOI: 10.6052/j.issn.1000-4750.2019.10.0598

多视角几何三维重建法识别工程结构缺损与变形

DETECTION OF STRUCTURAL DEFECT AND DEFORMATION BASED ON MULTI-VIEW GEOMETRIC THREE-DIMENSIONAL RECONSTRUCTION METHOD

  • 摘要: 裂缝等工程结构表面缺损与弯曲等构件变形是既有工程结构安全性检测鉴定与监测的重要指标,采用数字图像法可有效改善当前人工检查技术的缺点,但在工程实践中显现出定量检测中图像几何变形修正困难、局部损伤难以在整体结构中定位、无法测量钢结构空间变形等问题。结合多视角几何三维重建法的研究与应用可有效解决上述问题。该文对多视角几何三维重建的方法原理与算法实现进行讨论,列举方法实践的经典算法与高效算法;围绕数字图像法检测在工程实践中存在的问题,提出表面投影法解决成像几何变形与损伤定位、逆向工程建模与特征提取识别几何变形损伤;通过结构表面裂缝识别、大型构筑物表面损伤定位、钢结构构件变形识别等3个应用研究,阐述多视角几何三维重建法在结构表面损伤与变形识别中的具体操作方法与比较优势。多视角几何三维重建法具有设备要求低、操作方便快捷、模型色彩丰富、点云精度较高等特点,与数字图像法结合后在工程结构检测监测领域的研究与应用潜力巨大。

     

    Abstract: Surface damage and deformation are important indicators for testing, appraisal and monitoring of structural safety. The adoption of digital image method can effectively overcome the shortcomings of current manual inspection methods. However in engineering practice, challenges are encountered such as the difficulty in correcting the geometric deformation of the image during quantitative detection, the difficulty of damage localization of images in the overall structure, and the inability to measure the spatial deformation of the steel structure. By combining the research and application of multi-view geometric 3D reconstruction method, the above problems can be effectively solved. This paper discusses the principle and algorithm for the implementation of multi-view geometric 3D reconstruction, and introduces the classic and efficient algorithms for practice. Aiming at the problem of the digital image detection method in engineering practice, a surface projection method for the correction of imaging geometric deformation and damage localization, and a reverse engineering modeling and feature extraction method for the geometric deformation damage detection are proposed. Through three application studies including structural surface crack identification, large structure surface damage localization and steel structure component deformation identification, the specific operation methods and comparative advantages of multi-view geometric 3D reconstruction method for structural surface damage and deformation identification are discussed. The multi-view geometry three-dimensional reconstruction method has the benefits of low equipment requirements, convenient operation, rich model color and relatively high point cloud precision, After combined with the digital image method, it shows great research and application potential in the field of engineering structure inspection and monitoring.

     

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