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Energies 2016, 9(2), 98; doi:10.3390/en9020098

A Study on the Power Generation Capacity of Piezoelectric Energy Harvesters with Different Fixation Modes and Adjustment Methods

1,2,†
,
1,2,†,* , 1,2
and
1,2
1
School of Mechanical and Electrical Engineering, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China
2
Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 8 November 2015 / Accepted: 27 January 2016 / Published: 19 February 2016
(This article belongs to the Special Issue Waste Energy Harvesting)
View Full-Text   |   Download PDF [4446 KB, uploaded 19 February 2016]   |  

Abstract

The power generation capacity of piezoelectric energy harvesters (PEHs) is not only related to the properties of the piezoelectric material, the vibration magnitude and the subsequent conditioning circuit, but also to the fixation modes and adjustment methods. In this paper, a commercial piezoelectric ceramic plate (PCP) in simply supported beam fixation mode and cantilever beam fixation mode were analyzed through finite element simulations and experiments, and furthermore, two ways of adjusting the natural frequency of PCP are studied and compared. As a result, some guidelines are proposed for the application of PCPs according to the simulation and experimental results which showed that: (1) the simply supported beam fixation mode is suitable for environments in which the exciting frequency exceeds 50 Hz, while the cantilever beam fixation mode fits the circumstance where the exciting frequency is below 50 Hz; (2) the maximum generation power a PCP produces in simply supported beam fixation mode is larger than that in cantilever beam fixation mode; (3) adjusting the weight of the mass block affixed on the PCP can change the natural frequency of PCP more efficiently than length-width ratio does. View Full-Text
Keywords: wireless sensor node; piezoelectric energy harvester; fixation modes; adjusting methods; finite element simulation wireless sensor node; piezoelectric energy harvester; fixation modes; adjusting methods; finite element simulation
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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Li, Z.; Zhou, G.; Zhu, Z.; Li, W. A Study on the Power Generation Capacity of Piezoelectric Energy Harvesters with Different Fixation Modes and Adjustment Methods. Energies 2016, 9, 98.

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