A review on frequency tuning methods for piezoelectric energy harvesting systems

Abstract

Design and testing of piezoelectric energy harvester for powering wireless sensors of electric line monitoring system J. Appl. Phys. 111, 07E510 (2012); 10.1063/1.3677771 Broadband energy-harvesting using a two degree-of-freedom vibrating body Appl. Phys. Lett. 98, 214102 (2011); 10.1063/1.3595278 Piezoelectric energy harvesting using shear mode 0.71 Pb ( Mg 1 / 3 Nb 2 / 3 ) O 3 -0.29 PbTiO 3 single crystal cantilever Appl. Phys. Lett. 96, 083502 (2010); 10.1063/1.3327330Study on structure optimization of a piezoelectric cantilever with a proof mass for vibration-powered energy harvesting systemPiezoelectric energy harvesting technologies have received a great attention during the last decade to design self-powered microelectronic devices such as wireless sensor nodes. Piezoelectric energy harvester is a resonant system that produces maximum power output when its resonant frequency matches the ambient vibration frequency. The deviation from the resonance causes significant decrease in the power output. There are two possible solutions to compensate the effect of frequency deviation: widening the operating frequency bandwidth and tuning the resonant frequency. Tuning the resonant frequency is a more efficient technique for applications with single time varying dominant frequency. This paper presents a comprehensive review of frequency tuning methods for piezoelectric energy harvesting systems. Two categories generally investigated in the literature include manual and autonomous tuning methods. The recent developments of many tuning strategies are discussed and summarized. V C 2012 American Institute of Physics.

Energy Harvesting Research: The Road from Single Source to Multisource

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Bi-stable energy harvesting based on a simply supported piezoelectric buckled beam

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“…20,21 To maximize the energy harvesting efficiency from the ambient, two kinds of typical methods such as bandwidth widening and working frequency tuning have been developed in previous studies. [22][23][24] Blystad et al developed a wideband vibration-based energy harvester with a mechanical end stop on one side, an up-sweep bandwidth 9 Hz (114-123Hz) was measured at 0.24 g acceleration. 22 Ferrari designed a piezoelectric multifrequency energy converter using an array of multi-frequency bimorph cantilevers with different natural frequencies, three fundamental resonant frequencies 113 Hz, 183 Hz, and 281 Hz were measured.…”