A method and apparatus for inspecting large flat composite parts by using the Infrared LST technique

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Published Dec 21, 2022
DOI https://doi.org/10.3221/IGF-ESIS.63.11

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Vladimir Vavilov
National Research Tomsk Polytechnic University, Russia
Arsenii Chulkov
National Research Tomsk Polytechnic University, Russia
Denis Nesteruk
National Research Tomsk Polytechnic University, Russia
Douglas Burleigh
La Jolla Cove Consulting, USA
Alexey Moskovchenko
University of West Bohemia, Czech Republic

Abstract

The principle of Line Scan Thermography (LST) was used to develop a self-propelled infrared thermographic nondestructive testing device for the inspection of large, relatively flat composite aerospace parts, such as aircraft wings. The design of the unit allowed the suppression of noise from reflected radiation. The new equipment, using the LST method, provided defect detectability similar to that achieved with a classic, static, flash heating procedure, but with a higher rate of testing. Also, the line heating principle ensured more uniform thermal patterns, and the proper choice of scan speed and field of view allows the selection of optimal time delays and the creation of maps of defects at different depths. Defect characterization efficiency was improved by using a trained neural network.

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    Issue
    Vol. 17 No. 63 (2023): January 2023
    Section
    SI: Russian mechanics contributions for Structural Integrity

    How to Cite

    Vavilov, V. (2022) “A method and apparatus for inspecting large flat composite parts by using the Infrared LST technique”, Frattura ed Integrità Strutturale, 17(63), pp. 110–121. doi: 10.3221/IGF-ESIS.63.11.
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