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26 March 2012 Wireless structural health monitoring of cable-stayed bridge using Imote2-platformed smart sensors
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In this study, wireless structural health monitoring (SHM) system of cable-stayed bridge is developed using Imote2- platformed smart sensors. In order to achieve the objective, the following approaches are proposed. Firstly, vibrationand impedance-based SHM methods suitable for the pylon-cable-deck system in cable-stayed bridge are briefly described. Secondly, the multi-scale vibration-impedance sensor node on Imote2-platform is presented on the design of hardware components and embedded software for vibration- and impedance-based SHM. In this approach, a solarpowered energy harvesting is implemented for autonomous operation of the smart sensor node. Finally, the feasibility and practicality of the multi-scale sensor system is experimentally evaluated on a real cable-stayed bridge, Hwamyung Bridge in Korea. Successful level of wireless communication and solar-power supply for smart sensor nodes are verified. Also, vibration and impedance responses measured from the target bridge which experiences various weather conditions are examined for the robust long-term monitoring capability of the smart sensor system.
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Duc-Duy Ho, Khac-Duy Nguyen, Po-Young Lee, Dong-Soo Hong, So-Young Lee, Jeong-Tae Kim, Sung-Woo Shin, Chung-Bang Yun, and Masanobu Shinozuka "Wireless structural health monitoring of cable-stayed bridge using Imote2-platformed smart sensors", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83450T (26 March 2012);

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