J. Phys. IV France 128 (2005) 187-193
Energy harvesting from vibration using a piezoelectric membraneM. Ericka1, D. Vasic1, F. Costa1, G. Poulin2 and S. Tliba1
1 École Normale Supérieure de Cachan, Systémes et Applications des Technologies de l'Information et de l'Énergie (SATIE, UMR 8029), 61 avenue du Président Wilson, 94230 Cachan, France
2 LAG, Grenoble, France
In this paper we investigate the capability of harvesting the electric energy from mechanical vibrations in a dynamic environment through a unimorph piezoelectric membrane transducer. Due to the impedance matrices connecting the efforts and flows of the membrane, we have established the dynamic electric equivalent circuit of the transducer. In a first study and in order to validate theoretical results, we performed experiments with a vibrating machine moving a macroscopic 25 mm diameter piezoelectric membrane. A power of 1.8 mW was generated at the resonance frequency (2.58 kHz) across a 56 k optimal resistor and for a 2 g acceleration.
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