Measuring thickness change of transparent plate by electronic speckle pattern interferometry and digital image correlation

2010 ◽  
Vol 283 (18) ◽  
pp. 3481-3486 ◽  
Author(s):  
Xiangjun Dai ◽  
Hai Yun ◽  
Qi Pu
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Speckle Pattern ◽  
Image Correlation ◽  
Electronic Speckle Pattern Interferometry ◽  
Thickness Change ◽  
Transparent Plate

The Knowledge Acquired by Using of Optical Methods by Strain Fields Investigation

2013 ◽  
Vol 486 ◽  
pp. 141-146
Author(s):  
Martin Hagara ◽  
František Šimčák ◽  
Matúš Kalina
Keyword(s):  
Experimental Investigation ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Speckle Pattern ◽  
Image Correlation ◽  
Optical Methods ◽  
Optical Systems ◽  
Electronic Speckle Pattern Interferometry ◽  
Strain Fields ◽  
Pros And Cons

These days are preferably used contactless optical methods for experimental investigation of strains and displacements, which give some information on whole investigated surface. In this contribution the optical systems working on electronic speckle pattern interferometry (ESPI) principle and digital image correlation (DIC) method are described. By using of ESPI and DIC methods the displacements and strains fields on chosen types of specimens are determined. Pros and cons of particular methods and influence of various factors on reached results accuracy are compared. There are also mentioned the possibilities of using of optical methods in application of devices on authors department.

scholarly journals Speckle pattern processing by digital image correlation

2016 ◽  
Vol 48 ◽  
pp. 04003 ◽  
Author(s):  
Fedor Gubarev ◽  
Lin Li ◽  
Miron Klenovskii ◽  
Anatoliy Glotov
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Speckle Pattern ◽  
Image Correlation ◽  
Pattern Processing

Development of the Auto Mesh Generation Program for a Digital Image Correlation Method

2011 ◽  
Vol 462-463 ◽  
pp. 112-117
Author(s):  
Koji Tomita ◽  
Kenji Machida ◽  
Zu Guang Zhang
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Mesh Generation ◽  
Speckle Pattern ◽  
Correlation Method ◽  
Image Correlation ◽  
The Finite Element Method ◽  
Matching Method ◽  
Digital Image Correlation Method ◽  
Complicated Configuration

Since the method of performing displacement measurement and stress assessment of material by non-contact comes to capture the spotlight, study of the digital image correlation method which adopted the pattern-matching method for asking for displacement by deformation of a surface speckle pattern has been advanced. When the configuration for an analysis was settled in the rectangle and the square region, the whole-field mesh generation was also possible, but when it became a complicated configuration, the background etc. entered and mesh generation was affected. In order to solve such a problem, even if the object for an analysis was a complicated configuration, it aimed at generating a mesh automatically and obtaining appropriate analysis output in the displacement analysis and stress analysis using the generated mesh. In addition, the validity of the result was verified by the comparison with the finite element method. By this study, the convenience and availability of the digital image correlation method was improved remarkably, and it became clear to become a leading tool in health monitoring.

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