Journal
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
Volume 25, Issue 14, Pages 1658-1663Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X14533437
Keywords
Energy extraction circuit; mechanical switch; mechanical stopper; piezoelectric; wideband
Categories
Funding
- French National Research Agency (ANR) [ANR-11-JS09-002-01]
- ARC Energies from the Rhone-Alpes Region
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Nonlinear energy extraction techniques for piezoelectric vibration energy harvesting usually require synchronized electronic switches in their electronic interface circuits. But the difficulty to self-power their complex switching control strategies limits their performances, especially in the presence of wideband ambient excitations. This technical note presents a nonlinear energy extraction interface achieved by synchronous mechanical switches. The complex switching control strategy is dodged by taking advantage of mechanical stoppers and the moving part of the piezoelectric oscillator, which is driven by the vibration itself. As a result, the added mechanical stoppers and the self-synchronized nonlinear energy extraction circuit also make the energy harvesting device system be particularly suited to wideband ambient vibrations.
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