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Étude des phénomènes physiques utilisables pour alimenter en énergie électrique des micro-systèmes communicants

Abstract : In a few years, many kinds of sensors will invade our every day life. We already meet many of them in the cars, computers or telephony vicinity. This broad scale extension can continue only if two requirements are met, on the one hand, they communicate in a wireless mode and, on the other hand, they are energetically autonomous. Regarding communication systems, tremendous progress and standards have appeared recently. Technology seems fine even if improvements in -electric consumption are still possible. The real problem is now the autonomy of such devices because batteries have short life expectancy and induce pollution problems. - The idea is thus to recover the energy (mechanical, thermal, chemical or radiant) which surrounds the sensors to power them on in order to make them autonomous over all their lifespan. After a thorough important bibliographical study, we directed our study towards the mechanical vibrations energy scavenging. Measuremants have been performed in different places to determine the amount of energy that can be taken from the environment in order to dimension a system that can convert this mechanical energy on a wide band of frequencies. Two prototypes have been realized; the first one at a macroscopic scale using tungsten to validate the concept; a second one, using microfabrication techniques with silicon to obtain a miniaturized size compatible with the dimensions of the sensors to be supplied. The first experiments with the tungsten system have shown that it is possible to extract 480 µW for an excitation of 50 Hz frequency and 80 µm magnitude.
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Submitted on : Friday, July 13, 2007 - 4:03:29 PM
Last modification on : Friday, December 11, 2020 - 8:28:04 AM
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  • HAL Id : tel-00162518, version 1




G. Despesse. Étude des phénomènes physiques utilisables pour alimenter en énergie électrique des micro-systèmes communicants. Micro et nanotechnologies/Microélectronique. Institut National Polytechnique de Grenoble - INPG, 2005. Français. ⟨tel-00162518⟩



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