A Bistable Piezoelectric Harvester for Wideband Mechanical Frequency Excitation
N. Bencheikh1, A. Pagès1, T. Forissier1, T. Porchez1, A. Kras1, A. Badel2, F. Formosa2
1 CEDRAT TECHNOLOGIES, Meylan Cedex, France
2 Laboratoire SYMME, Université de Savoie – Polytech, Annecy le Vieux Cedex, France
The developments of autonomous systems such as for self health monitoring, embedded systems are increasingly used in industrial applications. The energy supply is a key point for the development of such systems. Solutions based on battery have limited life time and the power supplies through wires aren’t always appropriate and easy to install. Furthermore, the battery recycling is complex and an expensive process. The researches on power supply through harvesting systems are increasing in the same way the autonomous systems.
The paper focus on bistable harvester designed and invented by the laboratory SYMME using APA® technology and the industrial know how of Cedrat Technologies. Usually, bistable systems are based on magnetic interaction or buckled beams. The proposed solution is a buckled spring-mass (BSM) harvesting solution using amplified piezoelectric actuators (APA®). The description of the architecture and the concept are presented in the first part of this document. In the second part, the presentation of labs prototype based on standard APA120S® is given and described. The second prototype based on APA50 μXS® has been designed and modelled. The band-limited noise excitations are used to evaluate the proposed harvester’s performances. The
experimental results are given through a manufactured prototype test campaign. The comparison with the expected behaviour is also shown.
ACTUATOR 2014 Manuskript Poster 51
Publication date: 26/05/2015
Manuscript Poster 51 published in Conference Proceedings ACTUATOR 2014
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