A seam detection method for aircraft skin based on large-scale point cloud

Abstract

The invention discloses a large-scale point cloud-based aircraft skin seam detection method, comprising: step 1, calculating the point cloud density around each point in the aircraft skin point cloud; step 2, according to the calculated point cloud Density difference to segment the joint area, extract the point cloud of the joint area and the point cloud of the non-joint area; step 3, select a point in the point cloud of the joint area, extract the section at the point, and set the distance from the section to a certain range The point clouds of the joint area and the non-seam area in the inner area are respectively projected onto the section, and the cross-section projection point cloud is extracted; step 4, construct the calculation model of the step difference, and calculate the aircraft skin according to the projection point cloud and the calculation model of the step difference Steps and gaps at the points. The purpose of this application is to solve the problem of low automation in aircraft skin seam measurement, and the measurement accuracy of this application is high, and the measurement method is simple and easy 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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