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Energy harvesting power supply for wireless sensor networks: Investigation of piezo- and thermoelectric micro generators
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
2013 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Energiutvinnande kraftkälla för trådlösa sensornätverk : Undersökning av piezo- och termoelektriska mikrogeneratorer (Swedish)
Abstract [en]

Computers and their constituent electronics continue to shrink. The same amount of work can be done with increasingly smaller and cheaper components that need less power to function than before. In wireless sensor networks, the energy needed by one sensor node borders the amount that is already present in its immediate surroundings. Equipping the electronics with a micro generator or energy harvester gives the possibility that it can become self-sufficient in energy.

In this thesis two kinds of energy harvesters are investigated. One absorbs vibrations and converts them into electricity by means of piezo-electricity. The other converts heat flow through a semiconductor to electricity, utilizing a thermoelectric effect. Principles governing the performance, actual performance of off-the-shelf components and design considerations of the energy harvester have been treated. The thermoelectric micro generator has been measured to output power at 2.7 mW and 20°C with a load of 10 W. The piezoelectric micro generator has been measured to output power at 2.3 mW at 56.1 Hz, with a mechanical trim weight and a load of 565 W. In these conditions the power density of the generators lies between 2-3 W/m2.

Place, publisher, year, edition, pages
2013. , 60 p.
TVE, 13 058
Keyword [en]
energy harvesting piezo wireless sensor networks duty cycling UPWIS Seebeck Peltier piezoelectric thermoelectric
National Category
Embedded Systems Other Electrical Engineering, Electronic Engineering, Information Engineering Condensed Matter Physics
URN: urn:nbn:se:uu:diva-210429OAI: diva2:662618
External cooperation
Educational program
Master Programme in Engineering Physics
Available from: 2014-01-08 Created: 2013-11-07 Last updated: 2014-01-08Bibliographically approved

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Edvinsson, Nils
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Embedded SystemsOther Electrical Engineering, Electronic Engineering, Information EngineeringCondensed Matter Physics

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