音波を用いたパイプの不連続部検出 Discontinuity Detection of Pipe with Acoustic Wave

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There are many kinds of life infrastructure such as gas and water pipes, communication and power cables, are buried in the floor or wall of buildings. The layout information of these structures is very important in maintenance and repairing constructions. It is expected that by launching an acoustic wave directly into a pipe, the position of the discontinuities of the pipe can be estimated from the reflective waves precisely. In this paper, detection of the discontinuities of gas pipe is studied experimentally with an acoustic chirp signal. In order to distinguish L-junction and T-branch, the propagations of an acoustic wave are computed and studied by FDTD analysis. A differential method is proposed to reduce the directive wave. The experimental results show that the method improved distinctness of the reflective signals. It is also confirmed experimentally that the sidelobes of the compressed pulse are decreased by multiplying a Hamming window function to the output chirp signal. The proposed system is able to detect the discontinuities in 36m long gas pipe, and distinguish the L-junction and T-branch according to their reflection characteristics.

収録刊行物

  • 電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society  

    電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society 126(11), 1344-1350, 2006-11-01 

    The Institute of Electrical Engineers of Japan

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各種コード

  • NII論文ID(NAID)
    10018318366
  • NII書誌ID(NCID)
    AN10065950
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03854221
  • NDL 記事登録ID
    8560360
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-795
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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