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  4. An overview of clutter mitigation methods for tomographic material inspection
 
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2021
Journal Article
Titel

An overview of clutter mitigation methods for tomographic material inspection

Abstract
Millimeter wave-based material inspection methods are capable of providing 3-D-tomographic images of composite materials with a sufficient resolution to detect, localize, and classify critical defects. The nondestructive and noncontact-based measurement methods' potential can only be utilized with a complete understanding of the signals propagation behavior. Such that the relevant signal processing is tailored to the respective application. A core challenge of these systems remains clutter mitigation. Due to the composite materials' structure, a significant component of the received signal is corrupted by internal reflections, manifesting as clutter. For this purpose, a variety of different clutter mitigation methods, which include: normalization, moving average and moving median filter, entropy-based filtering, time gating, spatial filtering, and singular value decomposition, are investigated. These methods are applied to tomographic data of glass fiber reinforced plastic components, acquired via a W-band imaging system.
Author(s)
Baumann, Benjamin
Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Gashi, Bersant
Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Kühn, Jutta
Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Link, Torsten
Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Meier, Dominik
Composite Material Supply GmbH
Reindl, Leonhard M.
Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Rösch, Markus
Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Schlechtweg, Michael
Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Zech, Christian orcid-logo
IMTEK, Senior Member IEEE
Zeitschrift
IEEE transactions on microwave theory and techniques
Project(s)
InFaRo
Funder
Bundesministerium für Wirtschaft und Energie BMWi (Deutschland)
Thumbnail Image
DOI
10.1109/TMTT.2020.3034364
Language
English
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Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Tags
  • clutter mitigation

  • composite materials

  • millimeter-wave radar...

  • nondestructive testin...

  • radar-clutter

  • radar imaging

  • singular value decomp...

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