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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Jong Jae (Department of Civil & Environmental Engineering, Korea Advanced Institute of Science and Technology) Fukuda, Yoshio (Department of Civil & Environmental Engineering, University of California Irvine) Shinozuka, Masanobu (Department of Civil & Environmental Engineering, University of California Irvine) Cho, Soojin (Department of Civil & Environmental Engineering, Korea Advanced Institute of Science and Technology) Yun, Chung-Bang (Department of Civil & Environmental Engineering, Korea Advanced Institute of Science and Technology)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제3권 제3호
발행연도
2007.1
수록면
373 - 384 (12page)

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For structural health monitoring (SHM) of civil infrastructures, displacement is a good descriptor of the structural behavior under all the potential disturbances. However, it is not easy to measure displacement of civil infrastructures, since the conventional sensors need a reference point, and inaccessibility to the reference point is sometimes caused by the geographic conditions, such as a highway or river under a bridge, which makes installation of measuring devices time-consuming and costly, if not impossible. To resolve this issue, a visionbased real-time displacement measurement system using digital image processing techniques is developed. The effectiveness of the proposed system was verified by comparing the load carrying capacities of a steel-plate girder bridge obtained from the conventional sensor and the present system. Further, to simultaneously measure multiple points, a synchronized vision-based system is developed using master/slave system with wireless data communication. For the purpose of verification, the measured displacement by a synchronized vision-based system was compared with the data measured by conventional contact-type sensors, linear variable differential transformers (LVDT) from a laboratory test.

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