Three-dimensional point cloud-based aero-engine pipeline full-range gap measurement method and application
An aero-engine, three-dimensional point cloud technology, applied in computer parts, image data processing, instruments, etc., to achieve wide applicability and complete coverage of pipeline lengths
Pending Publication Date: 2022-04-29
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY +1
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Problems solved by technology
Most of the existing pipeline analysis methods based on 3D point cloud focus on the extraction and modeling of the pipeline, and the research on the full range clearance measurement is still a blank
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[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0041] The overall realization flowchart of a specific embodiment of the present invention, as figure 1 Specifically, the following steps are included:
[0042] Step S1: 3D instance segmentation of aero-engine piping: For a 3D point cloud of an aero-engine to be inspected, define pipeline points as foreground points and other points as scene points; use the large scene 3D point cloud deep feature learning model to perform point cloud features Cod...
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The invention discloses a three-dimensional point cloud-based aero-engine pipeline full-range gap measurement method and application. The method comprises the steps of minimum gap measurement of a pipeline section in a full scene range and minimum gap measurement of each section of the pipeline in a full range along an axis. Segmenting a pipeline instance on the three-dimensional point cloud of the aero-engine to be detected, and regarding each pipeline as a sequence of cylindrical sections; an initial cylindrical section is collected and fitted on each pipeline, a point set of a normal section where the axis of the cylindrical section is located is collected, a pipeline section external point closest to the axis is searched, and the distance serves as the minimum gap of the section pipeline in the whole scene; and respectively detecting and fitting the pipeline sections along the two axial ends of the initial cylindrical section, and measuring the minimum clearance of each pipeline section to realize the clearance measurement of each pipeline in a full-range along the axis in a full-engine scene. The method can accurately and efficiently measure the gap of an aero-engine or other multiple freely-bent long pipelines in complex distribution, and has the advantages of being resistant to disordered scene interference, resistant to point cloud noise and comprehensive in gap measurement range.
Description
technical field [0001] The invention relates to a three-dimensional point cloud-based method for measuring the full-range gap of an aeroengine pipeline and its application, belonging to the field of industrial vision, in particular to the field of three-dimensional vision. Background technique [0002] With the rapid development of industrial manufacturing and assembly, countries are paying more and more attention to the improvement of industrial level, especially in the aviation field. As a core aviation component, aeroengines have extremely strict requirements from design, processing to assembly. In order to ensure the stability and safety during operation, a series of rigorous overall inspections are required after the assembly of the aero-engine is completed. As the most widely distributed part outside the engine, the pipeline is the main carrier of the engine's fuel system, lubricating oil system, air system, anti-icing system and test system transmission medium, betwee...
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IPC IPC(8): G06T7/00G06T7/62G06T7/68G06V10/26G06V10/762G06V10/82G06K9/62
CPCG06T7/0004G06T7/62G06T7/68G06T2207/10028G06T2207/20081G06T2207/20084G06T2207/30172G06F18/2321
Inventor 张洁孙军华周子泰
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY