Patent ID: 11861793
Assignee: HUNAN UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for merging surface skin three-dimensional data, comprising:
step S100: constructing actually-measured three-dimensional data of a workpiece to be skinned and three-dimensional data of a design model of the workpiece;
step S200: calculating a normal vector, a neighborhood radius, and a position of a sphere center of each point in the design model three-dimensional data;
step S300: finding closest points to the design model three-dimensional data for all points in the actually-measured three-dimensional data;
step S400: calculating a static closest distance and a dynamic closest distance from each point in the actually-measured three-dimensional data to the corresponding closest point in the design model three-dimensional data, wherein each of the static closest distance and the dynamic closest distance comprises a Euclidean distance, a normal distance, and a surface adaptive distance calculated from the Euclidean distance and the normal distance;
step S500: constructing an objective function of the surface adaptive distance;
step S600 minimizing the objective function and calculating a differential motion screw ξ after the objective function is minimized; and
step S700: updating the actually-measured three-dimensional data based on the differential motion screw ξ and achieving the merging of the actually-measured three-dimensional data and the design model three-dimensional data.