| Project/Area Number |
22560482
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 |
OHGA Mitao 愛媛大学, 理工学研究科, 教授 (80116912)
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| Co-Investigator(Renkei-kenkyūsha) |
NAKAHATA Kazuyuki 愛媛大学, 理工学研究科, 准教授 (20380256)
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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 |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 無線ネットワーク / 構造ヘルスモニタリング / 3 次元可視化 / MEMS センサ / 振動計測 / 多点計測 / 振動モード同定 / 無線計測 / 構造モニタリング / 加速度 / 振動 / 可視化 / 振動モード / 3次元動態可視化 / MEMS加速度センサ / 3次元変形可視化 / MEMSセンサ |
|---|
| Research Abstract |
For the safety management of small and medium bridges, structural health diagnostics need to be carried out with efficiency and precision. In this study, a three-dimensional (3D) visualization system of a bridge’s condition was developedusing multi physical sensors located at multiple points on the bridge. Our system isportable and inexpensive because it involves the use of data connection by a Wi-Fi device and the microelectromechanical system (MEMS) technology. As an application, the 3D dynamic behavior of the bridge were visualized with the vibration data obtained from the acceleration MEMS sensor. The natural vibration modes, including the bending and torsional higher-order modes, can be identified by applying digital narrow-band filters to the visualization results of the bridge. A vibration experiment was performed on a pedestrian bridge in Japan. The vibration modes obtained from the experiment showed good agreement with the numerical results obtained by a finite element method.
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