In this paper, a new method for the investigation of the degradation of ballast railway track beds is proposed. An array of antennas is used for simultaneous acquisition of reflected radar impulses, which have been transmitted from different sending positions. This array setup allows an automated CMP-measurement, which enables a direct calibration of the ballast thickness. These multiple offset measurements using the array setup are well suited for fast railway inspections. The method offers the possibility to visualize the state of degradation of the ballast in a velocity spectrum. In the ongoing project it will be investigated, if a decrease of propagation velocity caused by fouling of the ballast will lead to a significant shift of the high amplitudes in the velocity spectrum towards lower velocities on the left side of the spectrum.


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    Title :

    Railway ballast fouling inspection by monitoring the GPR propagation velocity with a multi-offset antenna array


    Additional title:

    Prüfung des Bewuchses von Gleismaterial durch Beobachtung der Bodenradargeschwindigkeit mit einem aufgesetzten Antennenarray


    Contributors:
    Kind, T. (author) / Maierhofer, C. (author)


    Publication date :

    2006


    Size :

    4 Seiten, 6 Bilder, 15 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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