3 April 2012 Ultra low-power corrosion-enabled sensor node
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Abstract
Sensing systems play a lead role in the structural health monitoring (SHM) paradigm by performing actuation, data acquisition, and communication in order to enable the implementation of a health monitoring strategy. In many applications power provision is limited by the use of a battery as their power capacity often fails to exceed the intended long-term sensing requirements of the host structure. Energy harvesting has emerged as a potential powering solution to provide autonomous functionality to sensing systems. Galvanic corrosion as a form of energy harvesting has proved to be a viable source for operating simple low-power sensing and computing platforms for marine structures. The power characteristics of the energy harvester define a unique design problem for the sensor node power electronics, as the output voltage and current are extremely limited. This initiative considers the design of a sensor node that makes use of high-efficiency switching converters and low-power microprocessors to reduce the power demands on the energy harvester. In addition, the power electronics features a low duty-cycle control circuit to isolate the energy harvester from the sensing electronics for more efficient operation. A sensing proof-of-concept is conducted by means of temperature measurement.
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Scott A. Ouellette, Scott A. Ouellette, Michael D. Todd, Michael D. Todd, } "Ultra low-power corrosion-enabled sensor node", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 834523 (3 April 2012); doi: 10.1117/12.915290; https://doi.org/10.1117/12.915290
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