A Novel Non-Destructive Evaluation (NDE) Technique Using Coplanar Capacitive Imaging Probes

    Volume 42, Issue 3 (May 2014)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 18 November 2013

    Page Count: 13


    Yin, Xiaokang
    Center for Offshore Engineering and Safety Technology, China Univ. of Petroleum, Qingdao,

    Li, Wei
    Center for Offshore Engineering and Safety Technology, China Univ. of Petroleum, Qingdao,

    (Received 21 December 2012; accepted 24 September 2013)

    Abstract

    A novel NDE technique, known as capacitive imaging (CI), is introduced in this work. The CI approach uses a coplanar probe with two or more electrodes in air to produce a quasi-static electric field distribution within the material. The capacitive coupling allows this technique to detect both surface and hidden defect in insulating materials, and provide indications of surface profile of conducting materials. Scanning the electrodes over the material can form an image according to the changes in the output voltage from the coplanar CI probe. In this work, a detailed description of the CI technique is presented, including the theory, modes of operation, instrumentation, and some preliminary experimental results.


    Paper ID: JTE20120360

    DOI: 10.1520/JTE20120360

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    Title A Novel Non-Destructive Evaluation (NDE) Technique Using Coplanar Capacitive Imaging Probes
    Symposium , 0000-00-00
    Committee D09