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BAI, Y. MEGGS, C. BUTTON, T.
Original Title
Investigation of Using Free-Standing Thick-Film Piezoelectric Energy Harvesters to Develop Wideband Devices
Type
journal article in Web of Science
Language
English
Original Abstract
This paper is concerned with the wideband behavior of single-frequency and multi-frequency freestanding thick-film piezoelectric energy harvesters. The energy harvesting devices have been fabricated and brief fabrication information is provided. The individual harvesters have been combined with either symmetric or asymmetric tip masses, with some being connected together to form a harvester array. Testing has been undertaken using harmonic vibrations with a wide range of frequencies and accelerations, and also using a random machinery vibration, and data have been recorded in terms of un-rectified and rectified open-circuit voltage, output power with matched resistive loads, peak-to-peak tip displacement, and even charging rates of capacitors. As a general result, the individual harvesters with asymmetric tip masses have vibrated nonlinearly below and in the vicinity of the resonant frequencies. An individual harvester vibrating at the resonant frequency with 0.5 g acceleration has been able to charge a 1000 F capacitor to 1V within 12 min and to 1.5Vwithin 30 min. Also, the harvester array has exhibited a wideband response, where an open-circuit voltage of above 0.8V has been provided within a certain range of frequencies. Finally, the harvester array has successfully charged a capacitor on a vibrating test sieve shaker, proving the feasibility of the proposed device in real applications.
Keywords
Piezoelectric thick-film; array; wideband; nonlinear; charging capacitor; machinery vibration.
Authors
BAI, Y.; MEGGS, C.; BUTTON, T.
RIV year
2014
Released
2. 10. 2014
ISBN
0219-4554
Periodical
International Journal of Structural Stability and Dynamics
Year of study
14
Number
8
State
Republic of Singapore
Pages from
1440016-1
Pages to
1440016-12
Pages count
12