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

Large size speckle full-field strain measurement method

A technology of strain measurement and speckle, which is applied in the field of strain measurement, can solve the problems of difficult camera calibration and achieve the effect of wide application range, high measurement efficiency and simple system equipment

Active Publication Date: 2014-01-29
新拓三维技术(深圳)有限公司
View PDF5 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large-format deformation measurement, speckle preparation and camera calibration are more difficult, so there is still a lot of room for improvement

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
  • Large size speckle full-field strain measurement method
  • Large size speckle full-field strain measurement method
  • Large size speckle full-field strain measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] The present invention proposes a large-scale speckle full-field strain measurement method, the specific operation steps are as follows figure 1 shown. The hardware device used consists of figure 2 As shown, it is mainly composed of 2 CCD cameras, 1 high-frequency LED light source and 1 computer. In a particular embodiment, the large format workpiece is a thin steel plate with dimensions 800mm x 600mm x 2mm.

[0030] The first step, speckle preparation: use black and white two-color matte paint and a spray template to perform speckle printing on the measurement area on the surface of the large-scale workpiece to be measured, such as image 3 shown. Speckle preparation can also be done manually (such as Figure 4 shown). Preferably, speckle preparation requires: a) speckle features should be randomly distributed, and large black or white areas can...

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 large size speckle full-field strain measurement method. The method includes: firstly, preparing speckles; secondly, setting seed markers; thirdly, calibrating with a binocular camera; fourthly, acquiring sequence images; fifthly, selecting seed points; sixthly, calculating speckle strain. The method including the steps has the advantages that surface three-dimensional full-field strain under the action of large-sized structure load can be measured effectively, results are accurate and reliable, and measurement is performed without contact.

Description

technical field [0001] The invention relates to a strain measurement method, in particular to a large-format speckle full-field strain measurement method. Background technique [0002] With the continuous improvement of industrial manufacturing level, product parts are getting bigger and bigger, and the structure is becoming more and more complex, which makes the process parameter design and the precise control of the forming process very difficult. , performance, etc. often have certain deviations. Therefore, there is an urgent need to accurately measure the deformation during the forming process of large parts to help grasp the deformation characteristics of materials, analyze the deformation causes and laws of materials, predict the deformation trend of materials, etc., and then guide the mold structure in actual production. Improvement, process parameter optimization, etc. [0003] Traditional strain measurement methods such as strain gauges belong to contact measureme...

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): G01B11/16
Inventor 梁晋胡浩唐正宗
Owner 新拓三维技术(深圳)有限公司
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