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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 597546, 9 pages
http://dx.doi.org/10.1155/2012/597546
Research Article

Field Implementation of Wireless Vibration Sensing System for Monitoring of Harbor Caisson Breakwaters

1Research Center for Ocean Industry and Development, Pukyong National University, 599-1, Daeyeon 3-dong, Nam-gu, Busan 608-737, Republic of Korea
2Department of Ocean Engineering, Pukyong National University, 599-1, Daeyeon 3-dong, Namgu, Busan 608-737, Republic of Korea
3Coastal Development & Ocean Engineering Research Division, Korea Institute of Ocean Science and Technology, Sa 2-dong, Sangrok-gu, Ansan 426-744, Republic of Korea

Received 25 September 2012; Accepted 7 November 2012

Academic Editor: Ting-Hua Yi

Copyright © 2012 Han-Sam Yoon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A wireless sensing system for structural health monitoring (SHM) of harbor caisson structures is presented. To achieve the objective, the following approaches were implemented. First, a wave-induced vibration sensing system was designed for global structural health monitoring. Second, global SHM methods which are suitable for damage monitoring of caisson structures were selected to alarm the occurrence of unwanted behaviors. Third, an SHM scheme was designed for the target structure by implementing the selected SHM methods. Operation logics of the SHM methods were programmed based on the concept of the wireless sensor network. Finally, the performance of the proposed system was globally evaluated for a field harbor caisson structure for which a series of tasks were experimentally performed by the wireless sensing system.