| Project/Area Number |
22360179
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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 |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Ehime University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
OKAZAKI Shin-ichiro 愛媛大学, 理工学研究科, 講師 (30510507)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2011: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2010: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
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| Keywords | 非破壊検査 / コンクリート / 電磁波 / 超音波 / 電磁界有限積分法(EMFIT) / 動弾性有限積分法(EFIT) / 欠陥再構成 / 全波形サンプリング処理(FSAP)方式 / 全波形サンプリング処理方式(FSAP) |
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| Research Abstract |
In this research, a novel nondestructive imaging method in concrete material was developed by means of both ultrasonic and electromagnetic waves. Here, we proposed a phased array imaging technique which makes use of scattered waves of ultrasonic and electromagnetic waves, measured by every two-element combination as a pulser and a receiver, to synthesize high amplitude beams for any points in an inspection area. To validate this full-waveforms sampling and processing (FSAP), the numerical simulation based on the finite integration technique (FIT) and experimental measurement of ultrasonic and electromagnetic waves were performed. Using the FSAP technique, we demonstrated shape reconstructions of internal voids and corrosion parts of reinforced steel bars in concrete specimens. Furthermore, a computation method with a graphics processing unit (GPU) was introduced to execute the FSAP at high speed. We integrated our imaging method into a platform, and showed a prototype of aportable nondestructive imaging system.
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