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Books > Science & Mathematics > Physics > Optics (light)
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Powering Autonomous Sensors - An Integral Approach with Focus on Solar and RF Energy Harvesting (Paperback, 2011 ed.)
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Powering Autonomous Sensors - An Integral Approach with Focus on Solar and RF Energy Harvesting (Paperback, 2011 ed.)
Expected to ship within 10 - 15 working days
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Autonomous sensors transmit data and power their electronics
without using cables. They can be found in e.g. wireless sensor
networks (WSNs) or remote acquisition systems. Although primary
batteries provide a simple design for powering autonomous sensors,
they present several limitations such as limited capacity and power
density, and difficulty in predicting their condition and state of
charge. An alternative is to extract energy from the ambient
(energy harvesting). However, the reduced dimensions of most
autonomous sensors lead to a low level of available power from the
energy transducer. Thus, efficient methods and circuits to manage
and gather the energy are a must. An integral approach for powering
autonomous sensors by considering both primary batteries and energy
harvesters is presented. Two rather different forms of energy
harvesting are also dealt with: optical (or solar) and
radiofrequency (RF). Optical energy provides high energy density,
especially outdoors, whereas RF remote powering is possibly the
most feasible option for autonomous sensors embedded into the soil
or within structures. Throughout different chapters, devices such
as primary and secondary batteries, supercapacitors, and energy
transducers are extensively reviewed. Then, circuits and methods
found in the literature used to efficiently extract and gather the
energy are presented. Finally, new proposals based on the authors'
own research are analyzed and tested. Every chapter is written to
be rather independent, with each incorporating the relevant
literature references. Powering Autonomous Sensors is intended for
a wide audience working on or interested in the powering of
autonomous sensors. Researchers and engineers can find a broad
introduction to basic topics in this interesting and emerging area
as well as further insights on the topics of solar and RF
harvesting and of circuits and methods to maximize the power
extracted from energy transducers.
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