Fig. 1. Establishment of grid component point cloud model

Fig. 2. Schematic diagram of algorithm

Fig. 3. 3D point cloud scanning detection system

Fig. 4. Edge extraction of grid hole. (a) Before edge extraction; (b) after edge extraction

Fig. 5. Comparison between RANSAC and the proposed algorithm. (a) Scattered edge points based on RANSAC algorithm; (b) scattered edge points based on proposed algorithm; (c) circular fitting effect based on RANSAC algorithm; (d) circular fitting effect based on proposed algorithm; (e) display of the circle center extracted based on RANSAC algorithm in two-dimensional space; (f) display of the circle center extracted based on proposed algorithm in two-dimensional space; (g) display of circle center extracted based on RANSAC algorithm in three-dimensional space; (h) display of circle center extracted based on RANSAC algorithm in three-dimensional space

Table 1. Line laser fixing parameters

Table 2. Parameters of mobile slide