Component Deformation Measurement Based on Point Cloud
Guangkun Zhai, Yue Fei Zhou · 2019
For the problem of fuel rod bending and distortion, we independently developed a point cloud processing system based on monocular laser. The monocular laser device is used to obtain an outer edge contour image of the fuel rod, and the cross-sectional outer edge point cloud is processed based on the outer edge point. The cloud is adapted to the cross section and the fuel rod deformation is calculated based on the cross section. This article focuses on the use of cross sections to calculate fuel rod deformation and bending deformation. The method described in this paper is to obtain the outer cross-point of the fuel rod after using the upper and lower sets of monocular laser systems, and then use the total least squares method to fit the upper cross section and the lower cross section. The lower part of the point cloud data fitting part is used as the reference plane, and then the centroid displacement and the normal vector offset of the other cross sections relative to the reference plane are calculated. Finally, the two parameters are used to indicate the bending and twisting of the fuel rod.