Construction Quality Inspection Method of Substation Fabricated Structure Based on 3D Laser Scanning

Abstract

Abstract The substation construction project is highly professional and comprehensive, requiring multiple disciplines’ cooperation. It is greatly affected by geographical and environmental factors and has the characteristics of high management requirements and difficult quality control in the construction process. Based on the good initial position of the point cloud to be registered, if this requirement cannot be met, the registered point cloud data is prone to the optimal local solution. Thus, this paper introduces three-dimensional laser scanning to detect the construction quality of the substation assembly structure. On this basis, the data registration method realizes the accurate point cloud registration, and the data’s main feature vector is extracted through a linear transformation. Through the spatial transformation of the principal axis direction, the registration of the point cloud number is completed. The problem of the optimal local solution of registration is effectively solved. The point cloud data model is created by actual data acquisition, and the influencing factors of reverse construction of the geometric model are analyzed. The specific implementation scheme is put forward to ensure the accuracy of the geometric model construction. The test verified the reasonable and effective application of 3D laser scanning in the prefabricated building installation. Besides, the effective method of the high-precision point cloud model data output is determined.