The paper presents a novel three-stage algorithm for online compression of magnetic flux leakage (MFL) signals that are acquired in inspection of oil and gas pipelines. In the first stage, blocks of MFL signal are screened for useful information using a semi-robust statistical measure, Mean Absolute Deviation (micro AD). The study presents guidelines for selecting a block size to deliver robust screening and efficient compression ratios. In the second stage, a multivariate approach is used to compress the data across sensors using Principal Component Analysis (PCA). The second stage is invoked only when an anomaly is detected by sufficiently large number of sensors. In the third stage, the signal is further compressed within each sensor (univariate approach) using Discrete Wavelet Transform (DWT). Implementation on real-time MFL signals demonstrates the algorithm's ability to achieve high compression ratios with low Normalized Mean Square Error (NMSE) while being fairly robust to baseline shifts.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Online data compression of MFL signals for pipeline inspection


    Weitere Titelangaben:

    Online Datenkompression von magnetischen Streuflusssignalen zur Pipelineprüfung


    Beteiligte:
    Kathirmani, S. (Autor:in) / Tangirala, A.K. (Autor:in) / Saha, S. (Autor:in) / Mukhopadhyay, S. (Autor:in)

    Erschienen in:

    NDT&E International ; 50 , 1 ; 1-9


    Erscheinungsdatum :

    2012


    Format / Umfang :

    9 Seiten, 8 Bilder, 6 Tabellen, 27 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Pipeline inspection-tool speed alters MFL signals

    Atherton, D.L. / Jagadish, C. / Laursen, P. et al. | Tema Archiv | 1990


    PIPELINE INSPECTION ROBOT

    CICHOSZ RAFAL / WHITE JOHN / PRICE TOM et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    PIPELINE INSPECTION ROBOT

    CICHOSZ RAFAL / WHITE JOHN / PRICE TOM et al. | Europäisches Patentamt | 2017

    Freier Zugriff

    Pipeline inspection pig

    Yoshida, M. / Suzuki, N. / Hagio, A. et al. | Tema Archiv | 1989


    PIPELINE INSPECTION ROBOT

    CICHOSZ RAFAL / WHITE JOHN / PRICE TOM et al. | Europäisches Patentamt | 2018

    Freier Zugriff