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Title |
Development of Remote Measurement Method for Reinforcement Information in Construction Field Using 360 Degrees Camera
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Authors |
이명훈(Myung-Hun Lee) ; 우욱용(Ukyong Woo) ; 최하진(Hajin Choi) ; 강수민(Su-min Kang) ; 최경규(Kyoung-Kyu Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.6.157 |
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Keywords |
원격구조감리; 철근 배근 간격; 3D 포인트 클라우드; 360°카메라 Remote construction supervision; Rebar spacing; 3D point cloud; 360°camera |
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Abstract |
Structural supervision on the construction site has been performed based on visual inspection, which is highly labor-intensive and subjective. In this study, the remote technique was developed to improve the efficiency of the measurements on rebar spacing using a 360° camera and reconstructed3D models. The proposed method was verified by measuring the spacings in reinforced concrete structure, where the twelve locations in the constructionsite (265 m2) were scanned within 20 seconds per location and a total of 15 minutes was taken. SLAM, consisting of SIFT, RANSAC, and Generalframework graph optimization algorithms, produces RGB-based 3D and 3D point cloud models, respectively. The minimum resolution of the 3Dpoint cloud was 0.1mm while that of the RGB-based 3D model was 10 mm. Based on the results from both 3D models, the measurement error wasfrom 10.8% to 0.3% in the 3D point cloud and from 28.4% to 3.1% in the RGB-based 3D model. The results demonstrate that the proposed methodhas great potential for remote structural supervision with respect to its accuracy and objectivity.
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