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2013 Fiscal Year Final Research Report

Research on Development of the Rip Current Measuring System by using Acoustic Tomography

Research Project

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Project/Area Number 23560972
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Naval and maritime engineering
Research InstitutionOshima National College of Maritime Technology (2013)
Kobe University (2011-2012)

Principal Investigator

ISHIDA Hiroshi  大島商船高等専門学校, その他部局等, 校長 (60031473)

Co-Investigator(Kenkyū-buntansha) DEGUCHI Ichiro  大阪大学, 大学院工学研究科, 名誉教授 (00029323)
Research Collaborator NAKANO Iwao  海洋音響研究所, 所長
Project Period (FY) 2011 – 2013
Keywords音響トモグラフィー / 離岸流 / 計測装置 / 開発研究
Research Abstract

Every year, more than 300 swimming people lose their lives in beaches. These casualties are mainly caused by the rip current flowing to offshore. For the continuous observation of the rip current, The aim of this research is to develop the real-time monitoring system of the rip current by using the acoustic tomography.
The system consists of one dual-frequency acoustic fish-finder, two broad-band acoustic transducers, a set of sound reflectors and a data acquisition network. The modified dual-frequency acoustic fish-finder alternatively transmit and receive the sound signals of 50kHz at a few seconds interval. The observations were carried out in the Uradome Beach of Tottori Prefecture in September of 2012 and 2013. Based on these observational data, the current velocity fields were well reconstructed and weak offshore currents were detected. In conclusion, it was proved that the developed measurement system have a potential capability of monitoring the rip current.

  • Research Products

    (15 results)

All 2014 2013 2012 2011

All Journal Article (8 results) (of which Peer Reviewed: 4 results) Presentation (7 results)

  • [Journal Article] 反射波を用いた受動的双方向音波伝搬による流速測定2014

    • Author(s)
      中埜岩男, 石田廣史, 出口一郎
    • Journal Title

      海洋音響学会2014年度研究発表会講演論文集

      Pages: 47-48

  • [Journal Article] Realization of Acoustic Monitoring of Rip Current based on Passive Reciprocal Sound Transmissions2013

    • Author(s)
      Iwao Nakano and Hiroshi Ishida
    • Journal Title

      Proceedings of 2013 IEEE International Underwater Technology

      Volume: UT2013-1040 Pages: 4(various pages)

    • Peer Reviewed
  • [Journal Article] Measurement System for Acoustic Monitoring of Rip Current2013

    • Author(s)
      Iwao Nakano, Hiroshi Ishida and Ichiro Deguchi
    • Journal Title

      Proceedings of the 8th ACM International Conference on Underwater Networks & Systems

      Pages: 5(various pages)

    • Peer Reviewed
  • [Journal Article] 離岸流計測システムにおける音波伝搬特性2012

    • Author(s)
      中埜岩男, 石田廣史
    • Journal Title

      海洋音響学会2012年度研究発表会講演要旨集

      Pages: 95-96

  • [Journal Article] 音響反射体を用いた双方向音波伝搬システムによる離岸流観測2012

    • Author(s)
      中埜岩男, 石田廣史
    • Journal Title

      海洋調査技術学会第24回研究成果発表会講演要旨集

      Volume: 25

  • [Journal Article] An acoustic monitoring system of the rip current based on passive reciprocal transmissions2012

    • Author(s)
      Iwao Nakano and Hiroshi Ishida
    • Journal Title

      Proceedings of the OCEANS 2012 IEEE YEOSU Conference & xhibition

      Pages: 6(various pages)

    • Peer Reviewed
  • [Journal Article] 離岸流場周辺の波高と水位分布関する研究2011

    • Author(s)
      有田守, 出口一郎, 入江祐介, 松本卓郎, 杉森貴之
    • Journal Title

      土木学会論文集B2(海岸工学)

      Volume: Vol.67-No.2 Pages: 101-105

    • Peer Reviewed
  • [Journal Article] 離岸流の音響計測システム2011

    • Author(s)
      中埜岩男, 石田廣史
    • Journal Title

      2012年度春季海洋学会要旨集

      Volume: 159

  • [Presentation] 反射波を用いた受動的双方向音波伝搬による流速測定2014

    • Author(s)
      中埜岩男, 石田廣史, 出口一郎
    • Organizer
      海洋音響学会2014年度研究発表会
    • Place of Presentation
      東京
    • Year and Date
      2014-05-30
  • [Presentation] Measurement System for Acoustic Monitoring of Rip Current2013

    • Author(s)
      Iwao Nakano, Hiroshi Ishida and Ichiro Deguchi
    • Organizer
      the 8th ACM International Conference on Underwater Networks & Systems
    • Place of Presentation
      Kaohsiung, Taiwan
    • Year and Date
      2013-11-11
  • [Presentation] Realization of Acoustic Monitoring of Rip Current based on Passive Reciprocal Sound Transmissions2013

    • Author(s)
      Iwao Nakano and Hiroshi Ishida
    • Organizer
      2013 IEEE International Underwater Technology
    • Place of Presentation
      tokyo, Japan
    • Year and Date
      2013-03-08
  • [Presentation] 音響反射体を用いた双方向音波伝搬システムによる離岸流観測2012

    • Author(s)
      中埜岩男, 石田廣史
    • Organizer
      海洋調査技術学会第24回研究成果発表会
    • Place of Presentation
      東京
    • Year and Date
      2012-11-28
  • [Presentation] 離岸流計測システムにおける音波伝搬特性2012

    • Author(s)
      中埜岩男, 石田廣史
    • Organizer
      海洋音響学会
    • Place of Presentation
      東京
    • Year and Date
      2012-05-29
  • [Presentation] An acoustic monitoring system of the rip current based on passive reciprocal transmissions2012

    • Author(s)
      Iwao Nakano and Hiroshi Ishida
    • Organizer
      OCEANS 2012 IEEE YEOSU Conference & Exhibition
    • Place of Presentation
      Yeosu, Korea
    • Year and Date
      2012-05-22
  • [Presentation] 離岸流の音響計測システム2011

    • Author(s)
      中埜岩男, 石田廣史
    • Organizer
      2012年度春季海洋学会
    • Place of Presentation
      茨城
    • Year and Date
      2011-03-29

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Published: 2015-07-16  

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