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Proceedings Paper

Energy scavenging sensors for ultra-low power sensor networks
Author(s): Dominic C. O'Brien; Jing Jing Liu; Grahame E. Faulkner; Pithawat Vachiramon; Steve Collins; Steven J. Elston
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Paper Abstract

The 'internet of things' will require very low power wireless communications, preferably using sensors that scavenge power from their environment. Free space optics allows communications over long ranges, with simple transceivers at each end, offering the possibility of low energy consumption. In addition there can be sufficient energy in the communications beam to power simple terminals. In this paper we report experimental results from an architecture that achieves this. A base station that tracks sensors in its coverage area and communicates with them using low divergence optical beams is presented. Sensor nodes use modulated retro-reflectors to communicate with the base station, and the nodes are powered by the illuminating beam. The paper presents design and implementation details, as well as future directions for this work.

Paper Details

Date Published: 24 August 2010
PDF: 9 pages
Proc. SPIE 7814, Free-Space Laser Communications X, 78140A (24 August 2010); doi: 10.1117/12.861481
Show Author Affiliations
Dominic C. O'Brien, Univ. of Oxford (United Kingdom)
Jing Jing Liu, Univ. of Oxford (United Kingdom)
Grahame E. Faulkner, Univ. of Oxford (United Kingdom)
Pithawat Vachiramon, Univ. of Oxford (United Kingdom)
Steve Collins, Univ. of Oxford (United Kingdom)
Steven J. Elston, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 7814:
Free-Space Laser Communications X
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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