2013 Fiscal Year Final Research Report
Development of the mat type crack detection equipment for bridges
| Project/Area Number |
23560296
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Intelligent mechanics/Mechanical systems
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| Research Institution | Osaka City University |
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Principal Investigator |
KAWAI tadao 大阪市立大学, 工学(系)研究科(研究院), 教授 (20177637)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 診断 |
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| Research Abstract |
In this research, new monitoring system which can detect a crack on U rib in a bridge was proposed. In this system, shock wave being caused by impulse on a road was measured using acceleration sensors on a roed side. Our simulation showed that locations of sensor were very important to detect shock wave. Shock wave was reflected by a crack and arrived at sensors. Our simulation revealed how a shock wave caused by a impulse propagated from asphalt through steel to sensors. Sensor signals were processed by Wavelet analysis and estimated its RMS value. After checking its distribution patter, we could detect a location of a crack.
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