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Title
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A CAD matching method for 3D thermography of complex objects
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Author
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Abstract
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| Quality control of complex components using thermographic cameras remains a challenging task in industry because it is difficult to quantify the defect size and locations. This research describes a new automated methodology with minimal user input which uses a 3D pose estimation technique to map infrared thermographic images directly on a CAD file of the component. This mapping allows direct inspection of the thermal measurements on the CAD file. The methodology is compared with state-of-the-art 3D thermography techniques which use additional hardware like range cameras and 3D scanners to obtain 3D data. In our use cases, the proposed methodology provides a better 3D mapping of the thermal images. Traditional techniques typically rely on multiple sensors with different fields of view. This difference results in a partial overlap of spatial data and thermal data, hence a part of the thermal data is discarded in the 3D mapping. This is in contrast to our methodology which only uses one camera and maps all image-points representing the object to a 3D location. |
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Language
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English
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Source (journal)
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Infrared physics and technology. - Oxford
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Publication
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Amsterdam
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Elsevier science bv
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2019
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ISSN
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1350-4495
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DOI
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10.1016/J.INFRARED.2019.04.014
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Volume/pages
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99
(2019)
, p. 152-157
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ISI
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000470940200018
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Full text (Publisher's DOI)
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Full text (open access)
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