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Active thermography methods for near-surface layers inspection

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F17%3A43950785" target="_blank" >RIV/49777513:23640/17:43950785 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Active thermography methods for near-surface layers inspection

  • Original language description

    Active thermography is a method for infrared non-destructive testing of materials. This method is based on an external excitation of a measured sample and a thermographic analysis of its thermal response. The method has a lot of configurations and is usable for a wide range of applications and materials. However, it is especially suited for thin samples and near-surface layers. Pulsed thermography with a flash-lamp excitation source and Lock-In thermography with a LED-lamp excitation source are introduced in this contribution. A usability of both methods is demonstrated on an inspection of a stainless steel surface affected by laser marking and solar cells non-contact testing. Inspection of a stainless steel surface affected by the laser marking shows that both methods can detect changes made by the laser in a very thin stainless steel surface layer. Solar cells non-contact testing example shows that LED Lock-In thermographic analysis is able to detect some types of damages connected with electrical properties of the cells. It is shown, that it is complicated to detect these defects by a flash-pulse thermographic analysis. However, it is shown that the flash-pulse analysis is able to detect some material inhomogeneities, which are not detectable by the LED Lock-In inspection. Differences between the methods and their advantages or disadvantages in connection with the described examples are discussed in the contribution.

  • Czech name

  • Czech description

Classification

  • Type

    O - Miscellaneous

  • CEP classification

  • OECD FORD branch

    20201 - Electrical and electronic engineering

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2017

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů