2019 Fiscal Year Final Research Report
Development of super-resolution elastic wave camera using evanescent modes of guided wave
| Project/Area Number |
17H02052
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Social systems engineering/Safety system
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| Research Institution | Osaka University (2019)
Kyoto University (2017-2018) |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | x弾性波 / 非破壊検査 / 非接触 / レーザ |
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| Outline of Final Research Achievements |
This study is on the defect imaging technique using elastic waves in solid media generated by laser emission. For large structures such as concrete walls and steel pipes, low frequency range of audible sound can be used for the imaging. In the study for micro cracks in aluminum castings, delaminations in carbon fiber reinforced plastics and micro void in electrodes in electric circuits, the relationships between the ability of detection and resonance frequencies are revealed, which theoretically shows the feasibility for imaging micro voids.
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| Free Research Field |
x非破壊検査
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| Academic Significance and Societal Importance of the Research Achievements |
パルス状のレーザ光を薄板状材料に照射すると，弾性波が発生し，そのエネルギはレーザ照射位置の板の厚みや内在する損傷に依存する．この性質を利用すると，レーザの走査によって，コンクリート構造物の剥離やプラント内の鉄鋼構造物の内部損傷を遠隔より非接触で画像化ができる．本研究は，大型構造物の遠隔検査および小型部品の微細損傷の検出に関し，その適用可能性を示したものである．この非接触計測技術により，プラントの自動検査や製品の付加価値向上に大きく役立つ．
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