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Flow Driven Vibration Energy Harvester

[+] Author Affiliations
Enrico Bischur, Markus Menacher, Norbert Schwesinger

Technische Universitaet Muenchen, Munich, Germany

Sebastian Pobering

CiS Forschungsinstitut für Mikrosensorik und Photovoltaik GmbH, Erfurt, Germany

Paper No. SMASIS2010-3736, pp. 523-528; 6 pages
doi:10.1115/SMASIS2010-3736
From:
  • ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1
  • Philadelphia, Pennsylvania, USA, September 28–October 1, 2010
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4415-1 | eISBN: 978-0-7918-3886-0
  • Copyright © 2010 by ASME

abstract

This paper describes an energy harvester working with the repeated deflection of a piezoelectric cantilever. The harvester works in flowing media like wind or water. The bending of the cantilever is driven by vortices traveling across it. The presented device is an easy solution for vibration energy harvesting without the need of external mechanical vibration. The working principle was determined with macroscopic models in wind and water channels. The harvester does not need in general a mechanical adaption to the external vibration frequency, because it oscillates always with its resonance frequency at different flow velocities. Furthermore a self synchronization of cantilevers arranged beside each other could be observed in water. A second system was able to supply a load of approximatly 2 mW in a wind channel at a flow velocity of 8 m/s.

Copyright © 2010 by ASME

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