In order to develop self-powered wireless sensor nodes, many energy harvesting devices that are able to convert available ambient energy into electrical energy have been proposed in the literature. A promising technique, in terms of simplicity and high conversion efficiency, is the harvesting of ambient kinetic energy through piezoelectric materials. The aim of this work is to design and investigate the modal response and power output of a fractal-inspired, multi-frequency, piezoelectric energy converter. The converter is a square, thin sheet structure, characterized by a fractal geometry obtained through a pattern of cuts in the plate. There are two steps involved. First, a computational analysis of the converter is performed. Second, a physical prototype of the converter is built and its eigenfrequencies and power generation under different resistive loads are experimentally examined in the range from 0 to 120 Hz. The converter exhibits three eigenfrequencies and a good power output, particularly at the first eigenfrequency.

A wideband fractal-inspired piezoelectric energy converter: design, simulation and experimental characterization / Castagnetti, Davide. - In: SMART MATERIALS AND STRUCTURES. - ISSN 0964-1726. - STAMPA. - 22:(2013), pp. 1-11. [10.1088/0964-1726/22/9/094024]

A wideband fractal-inspired piezoelectric energy converter: design, simulation and experimental characterization

CASTAGNETTI, Davide
2013

Abstract

In order to develop self-powered wireless sensor nodes, many energy harvesting devices that are able to convert available ambient energy into electrical energy have been proposed in the literature. A promising technique, in terms of simplicity and high conversion efficiency, is the harvesting of ambient kinetic energy through piezoelectric materials. The aim of this work is to design and investigate the modal response and power output of a fractal-inspired, multi-frequency, piezoelectric energy converter. The converter is a square, thin sheet structure, characterized by a fractal geometry obtained through a pattern of cuts in the plate. There are two steps involved. First, a computational analysis of the converter is performed. Second, a physical prototype of the converter is built and its eigenfrequencies and power generation under different resistive loads are experimentally examined in the range from 0 to 120 Hz. The converter exhibits three eigenfrequencies and a good power output, particularly at the first eigenfrequency.
2013
22
1
11
A wideband fractal-inspired piezoelectric energy converter: design, simulation and experimental characterization / Castagnetti, Davide. - In: SMART MATERIALS AND STRUCTURES. - ISSN 0964-1726. - STAMPA. - 22:(2013), pp. 1-11. [10.1088/0964-1726/22/9/094024]
Castagnetti, Davide
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/970294
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