Ultrasonic nondestructive evaluation (NDE) is widely used for detecting flaws in oil pipelines. The backscattering noise may attain peak values greater than the sought flaw pulse. For improving the signal-to-noise ratio (SNR) and extracting a flaw echo corrupted by noise, a resonance demodulation technique and a resonance filter are proposed. The impulse response of the resonance filter can be represented as a superposition of Gaussian echoes. The analysis results show that this approach is more effective in extracting the information of a small flaw during pipeline NDE. The amplitude envelope of the processed ultrasonic signal after envelope detection obtains a notable SNR enhancement.


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    Title :

    Ultrasonic flaw detection during NDE of oil pipelines via a resonance filter


    Additional title:

    Ultraschall-Fehlernachweis bei der ZfP von Ölpipelines mittels Resonanzfilter


    Contributors:
    Wei, L. (author) / Pei-Wen, Q. (author) / Guang, Y. (author)

    Published in:

    Publication date :

    2006


    Size :

    6 Seiten, 6 Bilder, 8 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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