Monitoring system of static strain by using fiber bragg gratings with optical frequency domain reflectometry (特集 快適社会を支える計測) Monitoring System of Static Strain by using Fiber Bragg Gratings with Optical Frequency Domain Reflectometry

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Structural health monitoring systems have recently been researched and developed to ascertain the scale, danger level and location of structural damage in order to protect the lives of people from disasters caused by damage to artificial structures such as bridges and from natural disasters such as bedrock collapse. We are involved in a project to construct a wide-area structural health monitoring system using a multi-point fiber Bragg grating (FBG) with optical frequency domain reflectometry (OFDR). This system incorporates multi-point FBGs with the same reflection wavelength, and multi-point FBGs with different reflection wavelengths. By using an optical micro-electro-mechanical systems (MEMS) switch to multiplex these FBGs together, we showed that the reflected wavelengths can be measured in real time. This system is capable of monitoring the reflected wavelength measurement status of the selected channel every 4 seconds (corresponding to the period of the optical frequency sweep). By sequentially switching the optical MEMS switch, it is possible to monitor the time-series variation of reflected wavelengths of all channels. By using this system to perform continuous measurements over a 24-hour period, we also demonstrated the feasibility of performing static strain distribution measurements over a long period.

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  • 電気学会論文誌. A, 基礎・材料・共通部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society  

    電気学会論文誌. A, 基礎・材料・共通部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society 131(4), 251-256, 2011-04-01 

    The Institute of Electrical Engineers of Japan

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各種コード

  • NII論文ID(NAID)
    10027979460
  • NII書誌ID(NCID)
    AN10136312
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    03854205
  • NDL 記事登録ID
    11065059
  • 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
    Z16-793
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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