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29 March 2010 Wireless energy transmission to supplement energy harvesters in sensor network applications
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In this paper we present a method for coupling wireless energy transmission with traditional energy harvesting techniques in order to power sensor nodes for structural health monitoring applications. The goal of this study is to develop a system that can be permanently embedded within civil structures without the need for on-board power sources. Wireless energy transmission is included to supplement energy harvesting techniques that rely on ambient or environmental, energy sources. This approach combines several transducer types that harvest ambient energy with wireless transmission sources, providing a robust solution that does not rely on a single energy source. Experimental results from laboratory and field experiments are presented to address duty cycle limitations of conventional energy harvesting techniques, and the advantages gained by incorporating a wireless energy transmission subsystem. Methods of increasing the efficiency, energy storage medium, target applications and the integrated use of energy harvesting sources with wireless energy transmission will be discussed.
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K. M. Farinholt, S. G. Taylor, G. Park, and C. R. Farrar "Wireless energy transmission to supplement energy harvesters in sensor network applications", Proc. SPIE 7645, Industrial and Commercial Applications of Smart Structures Technologies 2010, 764505 (29 March 2010);

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