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22 April 2008 Development of smart sensor node for hybrid health monitoring on PSC girders
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In this study, a smart sensor node is developed for hybrid health monitoring of PSC girder bridges. Hybrid health monitoring of those structures is to alarm damage occurrence, to classify damage-types, and to identify damage locations and severities by measuring accelerations and impedance signals. In order to achieve the objective, the following approaches are implemented. Firstly, a smart sensor node with wireless sensing capacity and embedded monitoring algorithms is developed for measuring acceleration. Secondly, we design a hybrid damage monitoring scheme that combines acceleration-based and impedance-based methods for PSC girder bridges. Finally, the performance of the smart sensor node is evaluated using a laboratory-scale PSC girder bridge model for which acceleration and impedance signals were measured for prestress-loss and stiffness-loss cases.
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Jae-Hyung Park, Dong-Soo Hong, Jeong-Tae Kim, M. D. Todd, and D. Mascarenas "Development of smart sensor node for hybrid health monitoring on PSC girders", Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 693215 (22 April 2008);

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