YANG Na, ZHANG Chong, LI Tian-hao. DESIGN OF CRACK MONITORING SYSTEM FOR CHINESE ANCIENT WOODEN BUILDINGS BASED ON UAV AND CV[J]. Engineering Mechanics, 2021, 38(3): 27-39. DOI: 10.6052/j.issn.1000-4750.2020.04.0263
Citation: YANG Na, ZHANG Chong, LI Tian-hao. DESIGN OF CRACK MONITORING SYSTEM FOR CHINESE ANCIENT WOODEN BUILDINGS BASED ON UAV AND CV[J]. Engineering Mechanics, 2021, 38(3): 27-39. DOI: 10.6052/j.issn.1000-4750.2020.04.0263

DESIGN OF CRACK MONITORING SYSTEM FOR CHINESE ANCIENT WOODEN BUILDINGS BASED ON UAV AND CV

  • There are many cracks in Chinese ancient wooden buildings, and the formation and development of these cracks are complicated. These cracks can easily cause component brittleness, which seriously threaten the condition of Chinese ancient wooden buildings. Based on an unmanned aerial vehicle (UAV) and computer vision (CV), it designs a crack monitoring systems for Chinese ancient wooden structures, including an UAV system, a camera system, and an image processing system. In the UAV system, a UAV suitable for crack monitoring is designed, and the feasibility of hovering photography of the UAV is analyzed. In the camera system, the camera distortion correction and pixel resolution calibration are done, and an improved SIFT + RANSAC method is proposed to improve the accuracy of crack image mosaic. In the image processing system, a set of preprocessing methods is adopted, and Hessian matrix is combined with adaptive threshold segmentation algorithm, extracting crack features effectively. Then the size of members and cracks are accurately identified by CV measurement method. Finally, the feasibility of the proposed crack monitoring system is verified based on the wooden pavilion model of Chinese ancient buildings.
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