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

A technology for aircraft skins and detection methods, which is applied in measurement devices, 3D modeling, computer parts, etc., can solve the problems of low repeatability, high manual operation requirements, and large errors, and achieves high measurement accuracy and automation. high effect

Active Publication Date: 2021-11-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment Construction

[0063] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0064] In order to solve the problem that it is difficult to automatically measure aircraft skin step difference and gap in the prior art, the present invention provides a large-scale point cloud based aircraft skin seam detection method, figure 1 shows an alternative model structure for aircraft skinning, figure 2 An alternative flowchart showing the algorithm, as in figure 2 As shown, the method includes:

[0065] Step 1, calculate the point cloud density around each point in the aircraft skin point cloud;

[0066] Step 2. Segment the joint area according to the calculated point cloud density difference, and extract the point cloud of the joint area and the point cloud of the non-joint area;

[0067] Step 3: Select a point in the point cloud of the joint area, extract the cross section at the point, project the point clouds of the joint ...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/12G06T7/13G06K9/62
CPCG06T7/0002G06T7/12G06T7/13G06T2207/10028G06T2207/30168G06F18/23213G01B11/14G06V20/00G06T17/00G06T2207/30252
Inventor 汪俊隆昆谢乾鲁德宁
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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