| Project/Area Number |
26630340
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural/Functional materials
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
山中 一司 東北大学, 未来科学技術共同研究センター, 教授 (00292227)
辻 俊宏 東北大学, 工学研究科, 助教 (70374965)
三原 毅 東北大学, 工学研究科, 教授 (20174112)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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| Keywords | 非破壊検査 / 非線形超音波 / コンクリート / き裂 / フェーズドアレイ / 欠陥検出 / 閉じたき裂 |
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| Outline of Final Research Achievements |
Aging infrastructure has been inspected to ensure the safety and reliability, where most infrastructure has been made of concrete. However, it is difficult to inspect such concrete structures by ultrasonics with MHz because it is generally highly attenuative and heterogeneous. In this study, we developed the fundamental techniques to realize low-frequency nonlinear ultrasonic imaging method for the inspection of aging concrete structures. First, we constructed an imaging system that uses contact-type transmitter with a wedge and the laser scanning receiving array. It was demonstrated in the metal and concrete specimens. Furthermore, we fabricated a high-output low-frequency transducers and made a user-friendly imaging program.
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