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Effects of Proof Mass Geometry on Piezoelectric Vibration Energy Harvesters

Department of Electrical Engineering, École de Technologie Supérieure, Montréal, QC H3C 1K3, Canada
Author to whom correspondence should be addressed.
Sensors 2018, 18(5), 1584;
Received: 3 April 2018 / Revised: 12 May 2018 / Accepted: 14 May 2018 / Published: 16 May 2018
(This article belongs to the Special Issue Piezoelectric Micro- and Nano-Devices)
PDF [6159 KB, uploaded 16 May 2018]


Piezoelectric energy harvesters have proven to have the potential to be a power source in a wide range of applications. As the harvester dimensions scale down, the resonance frequencies of these devices increase drastically. Proof masses are essential in micro-scale devices in order to decrease the resonance frequency and increase the strain along the beam to increase the output power. In this work, the effects of proof mass geometry on piezoelectric energy harvesters are studied. Different geometrical dimension ratios have significant impact on the resonance frequency, e.g., beam to mass lengths, and beam to mass widths. A piezoelectric energy harvester has been fabricated and tested operating at a frequency of about 4 kHz within the audible range. The responses of various prototypes were studied, and an optimized T-shaped piezoelectric vibration energy harvester design is presented for improved performance. View Full-Text
Keywords: energy harvester; piezoelectric transducer; geometry; proof mass; resonant frequency energy harvester; piezoelectric transducer; geometry; proof mass; resonant frequency

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Alameh, A.H.; Gratuze, M.; Elsayed, M.Y.; Nabki, F. Effects of Proof Mass Geometry on Piezoelectric Vibration Energy Harvesters. Sensors 2018, 18, 1584.

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