13 April 2011 Hybrid wireless smart sensor network for full-scale structural health monitoring of a cable-stayed bridge
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Abstract
Rapid advancement of sensor technology has been changing the paradigm of Structural Health Monitoring (SHM) toward a wireless smart sensor network (WSSN). While smart sensors have the potential to be a breakthrough to current SHM research and practice, the smart sensors also have several important issues to be resolved that may include robust power supply, stable communication, sensing capability, and in-network data processing algorithms. This study is a hybrid WSSN that addresses those issues to realize a full-scale SHM system for civil infrastructure monitoring. The developed hybrid WSSN is deployed on the Jindo Bridge, a cable-stayed bridge located in South Korea as a continued effort from the previous year's deployment. Unique features of the new deployment encompass: (1) the world's largest WSSN for SHM to date, (2) power harvesting enabled for all sensor nodes, (3) an improved sensing application that provides reliable data acquisition with optimized power consumption, (4) decentralized data aggregation that makes the WSSN scalable to a large, densely deployed sensor network, (5) decentralized cable tension monitoring specially designed for cable-stayed bridges, (6) environmental monitoring. The WSSN implementing all these features are experimentally verified through a long-term monitoring of the Jindo Bridge.
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Hongki Jo, Sung-Han Sim, Kirill A. Mechitov, Robin Kim, Jian Li, Parya Moinzadeh, B. F. Spencer, Jong Woong Park, Soojin Cho, Hyung-Jo Jung, Chung-Bang Yun, Jennifer A. Rice, Tomonori Nagayama, "Hybrid wireless smart sensor network for full-scale structural health monitoring of a cable-stayed bridge", Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 798105 (13 April 2011); doi: 10.1117/12.880513; https://doi.org/10.1117/12.880513
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