UMA ABORDAGEM VIA CNC PARA GERAÇÃO DE PADRÕES DE PONTOS PARA ANÁLISES POR CDI
DOI:
https://doi.org/10.26512/ripe.v2i1.20729Keywords:
Digital image correlation. Speckle patterns. Computadorized numerical control marking.Abstract
Digital image correlation (DIC) is an optical metrology technique used to acquire deformational and displacement data of mechanically loaded surfaces based on digital images taken before and after the loading. To achieve this, this technique requires the studied surface to have a randomly distributed speckle pattern marked over it. This speckle pattern provides a reference for the image correlation procedure, allowing the DIC system to obtain the surface deformation based on the speckle pattern deformation. In this sense, as already stated in many recent studies, the quality of the used speckle pattern has direct influence on the quality of the DIC results. Although many numerical studies have already defined near optimum parameters for a speckle pattern, the lack of proper techniques to reproduce it on surfaces renders it impractical. In sight of this, this work presents a numerical methodology for the generation of speckle patterns and the development of a computadorized numerical control marking equipment capable of accurately reproducing it on real surfaces.
Downloads
References
Pan B, Qian Kemao, Xie H, Asundi A. On errors of digital image correlation due to speckle patterns. Proceedings of ICEM 2008: International Conference on Experimental Mechanics; 2008 Nov 8; Nanjing, China. SPIE; 2009.
Lecompte D, Sol H, Vantomme J. Analysis of speckle patterns for deformation measurements by digital image correlation. Proceedings of SPIE vol. 6341, Speckle06, From Grains to Flowers; 2006 Sep 13; Nimmes, France.
Lecompte D, Smits A, Bossuyt S, Sol H, Vantomme J, Van Hemelrijck D, Habraken AM. Quality assessment of speckle patterns for digital image correlation. Optics and Lasers in Engineering. 2006 Nov; 44(11): 1132-1145.
Lecompte D, Bossuyt S, Cooreman S, Sol H, Vantomme J. Study and generation of optimal speckle patterns for DIC. Proceedings of SEM Annual Conference & Exposition on Experimental and Applied Mechanics; 2007 Feb 19-22; Orlando, United States.
Crammond G, Boyd SW, Dulieu-Barton JM. Speckle pattern assessment for digital image correlation. Optics and Lasers in Engineering. 2013 Dec; 51(12): 1368-1378.
Ghorbani R, Matta F, Sutton MA. Full-field deformation measurement and crack mapping on confined masonry walls using digital image correlation. Experimental Mechanics. 2015 Jan; 55(1):227-243.
Mazzoleni P, Zappa E, Matta F, Sutton MA. Thermo-mechanical toner transfer for high quality digital image correlation speckle patterns. Optics and Lasers in Engineering. 2015 Dec; 75: 72-80.
McRoberts M. Arduino Básico. 2ª edição. São Paulo. Novatec; 2015.
Backes A. Linguagem C: Completa e descomplicada. Elsevier Brasil: 2012.
Downloads
Published
How to Cite
Issue
Section
License
Given the public access policy of the journal, the use of the published texts is free, with the obligation of recognizing the original authorship and the first publication in this journal. The authors of the published contributions are entirely and exclusively responsible for their contents.
1. The authors authorize the publication of the article in this journal.
2. The authors guarantee that the contribution is original, and take full responsibility for its content in case of impugnation by third parties.
3. The authors guarantee that the contribution is not under evaluation in another journal.
4. The authors keep the copyright and convey to the journal the right of first publication, the work being licensed under a Creative Commons Attribution License-BY.
5. The authors are allowed and stimulated to publicize and distribute their work on-line after the publication in the journal.
6. The authors of the approved works authorize the journal to distribute their content, after publication, for reproduction in content indexes, virtual libraries and similars.
7. The editors reserve the right to make adjustments to the text and to adequate the article to the editorial rules of the journal.