Aircraft skin seam detection method based on large-scale point cloud

Abstract

The invention discloses an aircraft skin seam detection method based on large-scale point clouds. The method comprises the following steps: 1, calculating the density of point clouds around each pointin aircraft skin point clouds; 2, according to the calculated point cloud density difference, segmenting a seam area, and extracting a seam area point cloud and a non-seam area point cloud; 3, selecting a point from the seam area point clouds, extracting a cross section at the point, respectively projecting the seam area point clouds and the non-seam area point clouds within a certain range awayfrom the cross section onto the cross section, and extracting cross section projection point clouds; and 4, constructing a step gap calculation model, and calculating the step and gap of the aircraftskin at the point according to the projection point cloud and the step gap calculation model. The invention aims to solve the problem of low automation degree of aircraft skin seam measurement, the measurement precision is high, and the measurement method is simple and convenient to implement.

Description

technical field [0001] The invention belongs to the technical field of aircraft skin seam step difference measurement, and in particular relates to an aircraft skin seam detection method based on a large-scale point cloud. Background technique [0002] With the rapid development of my country's aerospace industry, my country has made major breakthroughs in the field of aircraft research and development and manufacturing. As one of the key components of the aircraft, the skin is riveted to the internal frame of the aircraft through rivets. The assembly quality of the skin directly affects the reliability of the aerodynamic shape of the aircraft. Among them, the seam gap width and step difference at the joint of aircraft skin are one of the important indicators for evaluating the quality of skin assembly. [0003] The traditional method of domestic skin seam measurement is to use a feeler gauge to measure. This method requires high manual operation, and has large errors, low ...

AI Technical Summary

Problems solved by technology

[0003] The traditional method of domestic skin seam measurement is to use a feeler gauge for measurement. This method requires high manual operation, and has large errors, low efficiency, and low repeatability.

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