Detection of defects in bulging processes by means of dynamic laser speckle

Cezary Jasiński , Łukasz Morawiński , Andrzej Kocańda


The method described in this paper has been used to determine the moment when defects appear in the form of strain localization and grooves in the Marciniak bulging tests. In this method based on dynamic laser speckle, the sheet is illuminated by laser. Interference after reflection from the specimen surface creates a characteristic image of bright and dark spots. Specimen surface changes related with deformations and movements cause changes in the shape and size of spots, which are presented by authors in the form of speckle activity image. In order to identify the type of defect, the additional 3D microscopy measurements were performed. This paper presents analysis of the changes in the speckle activity image during the bulging process which enabled the defects identification during the bulging process.
Author Cezary Jasiński ( / / IoMP)
Cezary Jasiński,,
- The Institute of Manufacturing Processes
, Łukasz Morawiński ( / / IoMP)
Łukasz Morawiński,,
- The Institute of Manufacturing Processes
, Andrzej Kocańda (FPE / IoMP)
Andrzej Kocańda,,
- The Institute of Manufacturing Processes
Journal seriesComputer Methods in Materials Science, ISSN 1641-8581
Issue year2016
Publication size in sheets0.5
Keywords in Polishwybrzuszanie blachy, próba Marciniaka, system wizyjny, spekle laserowe, mikroskop cyfrowy 3D
Keywords in Englishsheet metal bulging, Marciniak test, vision system, laser speckle, 3D digital microscope
Abstract in PolishOpisano metodę znajdywania defektów w postaci lokalizacji odkształcenia i bruzdy w blasze wybrzuszanej metodą Marciniaka.W metodzie wykorzystuje się spekle laserowe,których aktywność na powierzchni odkształcanej blachy pozwala zidentyfikować te defekty. Skuteczność metody została zweryfikowana z wykorzystaniem pomiarów mikroskopowych 3D.
Languageen angielski
Score (nominal)12
ScoreMinisterial score = 12.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 12.0, 28-11-2017, ArticleFromJournal
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