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Development of monitoring system for large structures by non-contact defect imaging technique

Research Project

Project/Area Number 26282094
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Social systems engineering/Safety system
Research InstitutionKyoto University

Principal Investigator

Hayashi Takahiro  京都大学, 工学(系)研究科(研究院), 准教授 (30324479)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Keywords非破壊検査 / 非接触 / レーザ超音波 / ガイド波 / 画像化 / 非破壊評価 / レーザ / ラム波
Outline of Final Research Achievements

This study investigated defect imaging in plate-like structures using scanning laser source (SLS) technique, in which laser pulse for generating elastic wave is rastered over a plate and the elastic wave is detected at a fixed point on it. In this study, irradiating laser pulses at high repetition rate by fiber laser and modulating them enabled to generate narrowband burst elastic waves and improved signal level in frequency range. Moreover, it was theoretically and experimentally confirmed that averaging images at multiple frequencies provides clearer defect images. Using the experimental system with these functions, images of an inner wall-thinning were obtained for such a complex plate-like structures as a branched pipe by the measurements from 6 meters away.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report

Research Products

(17 results)

All 2017 2016 2015 2014

All Journal Article (5 results) (of which Peer Reviewed: 4 results,  Acknowledgement Compliant: 5 results) Presentation (12 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] Generation of narrowband elastic waves with a fiber laser and its application to the imaging of defects in a plate2017

    • Author(s)
      T. Hayashi, K. Ishihara
    • Journal Title

      Ultasonics

      Volume: 77 Pages: 47-53

    • DOI

      10.1016/j.ultras.2017.01.016

    • NAID

      120005973375

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Vibration energy analysis of a plate for defect imaging with a scanning laser source technique2016

    • Author(s)
      T. Hayashi, M. Fukuyama
    • Journal Title

      Journal of the Acoustical Society of America

      Volume: 140 Pages: 2427-2436

    • DOI

      10.1121/1.4964275

    • NAID

      120007149437

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] High-speed non-contact defect imaging for a plate-like structure2016

    • Author(s)
      T. Hayashi
    • Journal Title

      NDT and E International

      Volume: 85 Pages: 49-58

    • DOI

      10.1016/j.ndteint.2016.10.009

    • NAID

      120005973374

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Guided wave propagation in metallic and resin plates loaded with water on single surface2016

    • Author(s)
      Takahiro Hayashi, Daisuke Inoue
    • Journal Title

      42st Annual Review of Progress in Quantitative Nondestructive Evaluation AIP Conf. Proc.

      Volume: 695 Pages: 030003-030003

    • DOI

      10.1063/1.4940475

    • NAID

      120006654036

    • Related Report
      2015 Annual Research Report
    • Acknowledgement Compliant
  • [Journal Article] Imaging defects in a plate with complex geometries2016

    • Author(s)
      Takahiro Hayashi
    • Journal Title

      Applied Physics Letters

      Volume: 108 Pages: 081901-081901

    • DOI

      10.1063/1.4942599

    • NAID

      120006394739

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Fast Non-Contact Defect Imaging with Scanning Laser Source Technique2016

    • Author(s)
      T. Hayashi, M. Fukuyama, K. Ishihara
    • Organizer
      19th World Conference on Non-Destructive Testing
    • Place of Presentation
      Munich, Germany
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Remote imaging of plate-like structures with E-camera2016

    • Author(s)
      T. Hayashi
    • Organizer
      8th International Conference on Acoustic Emission
    • Place of Presentation
      Kyoto, Japan
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 薄板構造の非接触高速損傷画像化2016

    • Author(s)
      林高弘,福山美咲
    • Organizer
      日本機械学会 年次講演大会
    • Place of Presentation
      福岡
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 薄板状材料に対する高速遠隔損傷画像化技術2016

    • Author(s)
      林高弘
    • Organizer
      平成28年度 第1回「超音波による非接触材料評価研究会」
    • Place of Presentation
      京都
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 薄板構造の遠隔損傷画像化2016

    • Author(s)
      林高弘
    • Organizer
      非破壊検査協会 秋季講演大会
    • Place of Presentation
      仙台
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 薄板構造の非接触損傷画像化診断2016

    • Author(s)
      林高弘
    • Organizer
      日本機械学会 第15回評価・診断に関するシンポジウム
    • Place of Presentation
      京都
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Generation of narrow band elastic wave with a fiber laser and its application to the scanning laser source technique2015

    • Author(s)
      Takahiro Hayashi, Ken Ishihara
    • Organizer
      International Conference on Advanced Technology in Experimental Mechanics
    • Place of Presentation
      Toyahashi, Japan
    • Year and Date
      2015-10-06
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 半解析的有限要素法による漏洩ラム波の過渡応答解析2015

    • Author(s)
      林 高弘, 井上大輔
    • Organizer
      日本機械学会 2015年度年次大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2015-09-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] レーザ弾性波源走査法による遠隔からの損傷画像化2015

    • Author(s)
      林 高弘,福山美咲,石原剣
    • Organizer
      平成27年度 第2回 超音波による非接触非破壊計測・先進評価技術研究会
    • Place of Presentation
      日本非破壊検査協会亀戸センター
    • Year and Date
      2015-09-11
    • Related Report
      2015 Annual Research Report
  • [Presentation] Guided wave propagation in metallic and resin plates loaded with water on a single surface2015

    • Author(s)
      Takahiro Hayashi, Daisuke Inoue
    • Organizer
      Review of Progress inQuantitative Nondestructive Evaluation
    • Place of Presentation
      Minneapolis, US
    • Year and Date
      2015-07-27
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Simulation of leaky Lamb wave propagation witha semi-analytical finite element method2014

    • Author(s)
      Daisuke Inoue, Takahiro Hayashi
    • Organizer
      The 35th symposium on Ultrasonic electronics
    • Place of Presentation
      東京
    • Year and Date
      2014-12-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] Numerical analysis of leaky Lamb wave propagation using a semi-analytical finite element method2014

    • Author(s)
      Takahiro Hayasi, Daisuke Inoue
    • Organizer
      Review of Progress inQuantitative Nondestructive Evaluation
    • Place of Presentation
      Boise, Idaho, US
    • Year and Date
      2014-07-23
    • Related Report
      2014 Annual Research Report

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Published: 2014-04-04   Modified: 2018-03-22  

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