Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Thin-walled cylinder size precision analysis and AR visualization method based on point cloud

A thin-walled cylinder and dimensional accuracy technology, which is applied in image analysis, geometric CAD, image data processing, etc., can solve the problem of unintuitive display of error information, achieve the effect of solving unintuitive display, improving processing efficiency, and improving accuracy

Active Publication Date: 2022-04-29
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can realize the automatic analysis of the dimensional error of the thin-walled cylinder, can eliminate the influence of the out-of-tolerance part in the data ratio, improve the accuracy of the dimensional error analysis, and can directly superimpose and display the analysis results on the surface of the thin-walled cylindrical part, solving the problem that the display of the error information is not intuitive

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thin-walled cylinder size precision analysis and AR visualization method based on point cloud
  • Thin-walled cylinder size precision analysis and AR visualization method based on point cloud
  • Thin-walled cylinder size precision analysis and AR visualization method based on point cloud

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0042] This embodiment takes the solid rocket motor housing as an example to illustrate the method in this paper, and its structural schematic diagram is as attached figure 2 , attached image 3 .

[0043] First, the cylindrical fitting method based on random sampling consistency is used to extract and segment the solid rocket motor shell point cloud, and the solid rocket motor shell point cloud can be divided into thin-walled cylinder (cylindrical) point cloud and other part of the point cloud , and get the cylinder axis equation. In order to facilitate subsequent point cloud analysis and processing, the point cloud is rotated so that the axis of the cylinder is parallel to the X axis of the space coordinate system. Then the thin-walled cylinder point cloud and other part point clouds are processed separately.

[0044] (1) Thin-walled cylinder point cloud processing:

[0045]① Differentially slice the point cloud of the thin-walled cylinder along the X-axis direction. Th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a thin-walled cylinder size precision analysis and AR visualization method based on a point cloud, and the method comprises the steps: carrying out the differential division of a thin-walled cylinder point cloud into slices, carrying out the fitting of an axis through the central point of each slice, calculating an out-of-tolerance part, removing the out-of-tolerance part and a neighborhood point cloud, continuing the differential-slicing-fitting-point removal, and carrying out the iterative circulation, therefore, the size out-of-tolerance part of the thin-walled cylinder is accurately calculated, the mark point cloud is segmented, the mark pose is solved and used for virtual-real fusion registration of the point cloud, and the size precision analysis result is superposed on the entity of the thin-walled cylinder and used for guiding shape correction. According to the method, automatic analysis of the thin-walled cylinder size error can be realized, the influence of an out-of-tolerance part can be eliminated in a data ratio, the size error analysis precision is improved, an analysis result can be directly overlapped and displayed on the surface of a thin-walled cylinder part, and the problem that error information display is not visual is solved.

Description

technical field [0001] The invention belongs to the technical field of component detection, and in particular relates to a method for dimensional accuracy analysis and AR visualization of a thin-walled cylinder. Background technique [0002] Thin-walled cylindrical parts are widely used in the aerospace industry because of their high specific strength, which can greatly reduce the structural weight. However, in terms of processing technology, thin-walled cylindrical parts have poor rigidity, are prone to deformation during processing, and the quality of one-time processing is not high. Most of the existing thin-walled cylindrical parts are processed using the processing process of processing-measurement-modification-measurement. The measurement and modification process is repeated, and the measurement process has a great impact on the processing efficiency of the parts. [0003] At present, the measurement of thin-walled cylindrical parts in domestic factories is still main...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06T19/00G06T7/11G06T7/60
CPCG06F30/17G06T19/006G06T7/11G06T7/60G06T2207/10028G06T2207/30164Y02P90/30
Inventor 王淑侠张啸天侯正航刘岱松何卫平
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com