30 March 2009 Passive sensors for infrastructure monitoring
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A class of low-cost, wireless sensor has been developed at the University of Texas at Austin to monitor the performance of reinforced and prestressed concrete members in civil infrastructure systems. The sensors are designed to be interrogated in a wireless manner as part of a routine inspection. The sensors do not require batteries or connections to external power supplies. As such, the sensors are intended to be maintenance free over the service life of the infrastructure system. Research efforts to date have focused on detecting the onset of corrosion. It is envisioned that the sensors would be attached to the reinforcement cages before placement of the concrete. The results of long-term exposure tests will be used in this presentation to demonstrate the potential and reliability of the resonant sensors.
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Sharon L. Wood, Sharon L. Wood, Dean P. Neikirk, Dean P. Neikirk, } "Passive sensors for infrastructure monitoring", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 729202 (30 March 2009); doi: 10.1117/12.821722; https://doi.org/10.1117/12.821722

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