A Registration Method of Aircraft C-Beam Based on Local Invariance

An aircraft and registration technology, which is applied in graphics and image conversion, image analysis, image enhancement, etc., to achieve the effects of ensuring registration accuracy and method reliability, solving technical problems, and high application value

Active Publication Date: 2020-12-15
南京耘瞳科技有限公司
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Problems solved by technology

Through the effective fusion of the three methods, the success rate and accuracy of the registration between the actual measurement data of the deformed aircraft C-beam and the standard digital-analog inspection have been greatly improved, and the detection of deformed C-beams in the field of aviation manufacturing has been solved. previous registration problem

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  • A Registration Method of Aircraft C-Beam Based on Local Invariance
  • A Registration Method of Aircraft C-Beam Based on Local Invariance
  • A Registration Method of Aircraft C-Beam Based on Local Invariance

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Embodiment Construction

[0049] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0050] combine figure 1 , the present invention proposes a local non-deformable aircraft C-beam registration method, which is especially suitable for deformed aircraft C-beam workpieces. The registration method includes:

[0051] S1, obtain the measured point cloud data of the aircraft C-beam.

[0052] S2, use the fast point feature histogram feature description method to perform rough registration on the C-beam digital model and the measured point cloud data.

[0053] S3, performing segmentation processing and plane extraction on the measured point cloud data after rough registration, dividing the C-beam into three planes, and determining the bottom surface of the C-beam from them.

[0054] S4, using the bottom surface of the C-beam as a constraint for registration with the digital model of the ...

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Abstract

The invention discloses an aircraft C-shaped beam registration method based on local invariance. The method comprises the following steps: acquiring actual measurement point cloud data of an aircraftC-shaped beam; carrying out coarse registration on the C-shaped beam digital-analog and actual measurement point cloud data by utilizing a rapid point feature histogram feature description method; carrying out segmentation processing and plane extraction on the roughly registered actual measurement point cloud data, segmenting the C-shaped beam into three planes, and judging the bottom surface ofthe C-shaped beam from the three planes; taking the bottom surface of the C-shaped beam as a constraint of C-shaped beam digital-analog registration, carrying out fine registration by adopting part ofpoint cloud data of the bottom surface of the C-shaped beam and the C-shaped beam digital-analog registration, and calculating to obtain a transformation matrix of actually measured point cloud dataof the bottom surface of the C-shaped beam and the C-shaped beam digital-analog registration; and performing position transformation on the roughly registered aircraft C-shaped beam actual measurementpoint cloud data by adopting the transformation matrix to obtain a final registration result. According to the method, the success rate and the accuracy of registration of the airplane C-shaped beamactual measurement data and the standard digital-analog before detection under the deformation condition are greatly improved.

Description

technical field [0001] The invention relates to the technical field of precision machining and detection of workpieces in the aviation manufacturing industry, in particular to an aircraft C-beam registration method based on local non-deformation. Background technique [0002] With the wide application of composite materials in the field of aircraft manufacturing, the material of some aircraft load-bearing components has changed from metal materials to composite materials. This development trend has become one of the important directions for the technological upgrading of the aviation manufacturing industry in the future. During the development of new aircraft in my country, composite C-beams have gradually become the preferred structure for design. Its molding and processing have gone through a series of complicated processes, and many uncontrollable or unpredictable changes have been encountered in these processes. In order to make it meet the requirements of service perfo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/33G06T7/11G06T5/40G06T3/60
CPCG06T3/60G06T5/40G06T2207/10028G06T7/11G06T7/33G06T7/344
Inventor 汪俊曹涛谢乾徐旭
Owner 南京耘瞳科技有限公司
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