Check patentability & draft patents in minutes with Patsnap Eureka AI!

Grid patch retrieval method for curved surface part measurement points based on area method

A technology of curved surface parts and measurement points, which is applied in the precision field of curved surface parts, can solve problems such as the lack of direct methods for the retrieval operation of grid patches corresponding to measurement points

Pending Publication Date: 2021-09-10
GUANGDONG INST OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the direction information of the normal vector of the patch can be directly obtained according to the stored data of the STL file, but the retrieval operation of the grid patch corresponding to the measurement point lacks a direct method

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
  • Grid patch retrieval method for curved surface part measurement points based on area method
  • Grid patch retrieval method for curved surface part measurement points based on area method
  • Grid patch retrieval method for curved surface part measurement points based on area method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0118] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0119] In the prior art, the triangular mesh model is used to express the outline of complex curved surface parts, but the angular mesh model is composed of a series of connected triangular faces to approximately express the outline of the model, in the computer in the STL file format For storage, the data information of each grid surface is listed one by one in the file. However, the storage order of the mesh patches is random, and each mesh patch only records the normal vector of the mesh patch and the coordinate information of the three vertices.

[0120] The data information of each mesh patch in the STL file consists of 7 lines of code, as shown in the following example:

[0121] facet normal-5.7027666E-01-5.3120555E-02-8.1973332E-01

[0122] outer loop

[0123] vertex+8.1397248E+01+6.123844...

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 grid patch retrieval method for curved surface part measurement points based on an area method. The method comprises the following steps of: step A, acquiring patch data of each grid patch in an STL file one by one; step B, acquiring the surface patch area of the currently selected grid surface patch; step C, obtaining the areas of three triangles formed by the measuring points and any two vertexes of the currently selected grid patch; step D, comparing the area of the currently selected grid patch with the sum of the areas of the three triangles, judging whether the currently selected grid patch is the grid patch corresponding to the measurement point or not according to the comparison result, if yes, entering the step E, if not, re-selecting a new grid patch, and returning to the step B; and step E, obtaining the normal vector direction of the grid surface patch to drive the measuring head to move. According to the invention, direct data processing operation of the STL file corresponding to the triangular mesh model is realized, the outer normal vector direction of the model contour corresponding to the measurement point is rapidly obtained, and the measurement head for precision detection is effectively driven to move.

Description

technical field [0001] The invention relates to the precision technical field of curved surface parts, in particular to a grid patch retrieval method based on the area method for measuring points of curved surface parts. Background technique [0002] In the production process of complex curved surface parts, it is necessary to use corresponding detection technology to detect and control its machining accuracy. Among them, the detection technology based on the three-coordinate measuring machine (CMM) is often used for the shape and position accuracy detection of precision parts. At present, the 3D data of parts with complex curved surfaces is often stored as a parametric model in the computer, and any shape data information in it is accurately recorded through digital information such as shape features or parametric surfaces. By retrieving the recorded digital information, the normal vector direction of the part shape corresponding to the measurement point is directly obtain...

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
IPC IPC(8): G06F30/17G06F111/10
CPCG06F30/17G06F2111/10
Inventor 文豪高健张小明徐志伟彭朝阳万丽波
Owner GUANGDONG INST OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com