PROCEEDINGS ARTICLE | March 26, 2012
Proc. SPIE. 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012
KEYWORDS: Ferroelectric materials, Magnesium, Sensors, Solar cells, Electroluminescence, Energy harvesting, Structural health monitoring, Bridges, Wireless communications, Smart sensors
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.
