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http://dx.doi.org/10.5302/J.ICROS.2004.10.1.066

Development of Inspection System for Crack on the Lining of Concrete Tunnel  

고봉수 (한양대학교 대학원)
손영갑 (한양대학교 대학원)
신동익 (㈜삼성테크윈)
김병화 (한국건설기술연구원)
한창수 (한양대학교 기계정보경영)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.10, no.1, 2004 , pp. 66-72 More about this Journal
Abstract
To assess tunnel safety, cracks in tunnel lining are measured by inspectors, who observe cracks with their naked eyes and record them. But manual inspection is slow, and measured crack data is subjective. Therefore, this study proposes inspection system fur measuring cracks in tunnel lining and providing objective crack data to be used in safety assessment. The system consists of On-vehicle system and Laboratory system. On-Vehicle system acquires image data with line CCD camera on scanning along the tunnel lining. Laboratory system extracts crack information from the acquired image using image processing. Measured crack information is crack thickness, length and orientation. To improve accuracy of crack recognition, the geometric properties and patterns of cracks in concrete structure were applied to image processing. The proposed system was verified with experiments in both laboratory environment and field environment such as subway tunnel.
Keywords
cracks in tunnel; image acquisition; image processing; inspection system; line CCD camera; manual inspection; tunnel assessment; tunnel lining; tunnel safety; crack measurement;
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