Aircraft skin opposite joint gap calculation method based on end face extraction

Abstract

The invention discloses an aircraft skin opposite joint gap calculation method based on end face extraction. The method specifically comprises the steps of acquiring aircraft skin actual measurement point cloud data; carrying out rasterization processing on the actual measurement point cloud data; calculating the planeness of the point cloud data in each grid through principal component analysis,extracting a plane grid in each grid, and fitting the point cloud data in the plane grids into a plane by adopting a weighted least square algorithm; extracting point cloud data of a skin plane area by adopting an area growth algorithm based on the fitted grid plane; and fitting a plane by adopting an iterative weighted least square algorithm, judging whether the fitted plane is an end face or not, and calculating a butt joint gap of the end face of the skin. According to the invention, the aircraft skin gap alignment gap can be accurately calculated, and the problem that the aircraft skin gapalignment gap is difficult to detect is solved.

Description

technical field [0001] The invention relates to the field of computer vision, in particular to a method for calculating the gap between seams of aircraft skins based on end face extraction. Background technique [0002] With the rapid development of three-dimensional measurement technology, the existing measurement equipment has been able to quickly measure large-scale scenes and complex parts, and the scanning speed can scan hundreds of thousands or even millions of points per second; the scanning accuracy has also been greatly improved. improvement. In recent years, with the gradual application of three-dimensional measurement technology in the aviation field, it is often used to detect the manufacturing errors of some key parts and the assembly errors of parts in the aircraft manufacturing process. The seam gap in the aircraft skin assembly state will directly affect the shape and aerodynamic performance of the aircraft. Therefore, effectively controlling the seam gap ge...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for calculating the seam gap of aircraft skin based on end surface extraction, which can accurately extract the seam gap of the skin under the aircraft assembly state, and effectively solve the problem of difficulty in extracting the seam gap of the skin in the aircraft assembly process

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