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    Classification of pulsed eddy current GMR data on aircraft structures

    Classification of pulsed eddy current GMR data on aircraft structures


    This paper presents a technique to automatically detect third-layer cracks at rivet sites in aircraft structures using the response signals collected by giant magneto-resistive (GMR) sensors. The inspection system uses pulsed waveform as the excitation source of a multi-line coil and captures the transient fields associated with the induced eddy currents via a GMR sensor, which was developed to detect cracking and corrosion in multi-layer aircraft structures. An automatic scan of the region around the rivet generates C-scan image data that can be processed to detect cracks under the rivet head. Using a 2-D image of each rivet head, feature extraction and classification schemes based on principal component analysis and the k-means algorithm have been successfully developed to detect cracks of varying size located in the third layers at a depth of up to 10 mm below the surface.

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    Titel :

    Classification of pulsed eddy current GMR data on aircraft structures

    Weitere Titelangaben:

    Klassifikation von Wirbelstromimpuls-GMR-Daten an Luftfahrtstrukturen

    Beteiligte:
    Kim, Jaejoon (Autor:in) / Yang, Guang (Autor:in) / Udpa, Lalita (Autor:in) / Udpa, Satish (Autor:in)
    Erschienen in:

    NDT&E International ; 43 , 2 ; 141-144

    Erscheinungsdatum :

    2010

    Format / Umfang :

    4 Seiten, 6 Bilder, 16 Quellen

    ISSN :

    0963-8695

    DOI :

    https://doi.org/10.1016/j.ndteint.2009.10.003

    Medientyp :

    Aufsatz (Zeitschrift)

    Format :

    Print

    Sprache :

    Englisch

    Schlagwörter :

    zerstörungsfreie Prüfung , Wirbelstromprüfung , Wirbelstromsensor , Riesenmagnetowiderstand , Flugzeug , Klassifikation , Signalauswertung

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