This article applies 3D LADAR scanning technology to ground flatness detection.A detailed introduction to the principle,detection method,detection speed,accuracy,and feasibility of this technology were provided.The results show that this technology can significantly improve detection efficiency,reduce labor costs,and increase enterprise profits;Compared to manual inspection,this method only requires one person to operate on-site,significantly reducing labor costs;The ground flatness detection based on 3D laser scanning can improve work efficiency by more than 50％and obtain all data of the tested surface;The data accuracy of 3D laser scanning is related to the distance between measuring stations,and a reasonable layout of stations can control the scanning error within±2mm.The research results and engineering experience can provide important references for the intelligent development of building structure detection.
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