Title :
Bandwidth widening strategies for piezoelectric based energy harvesting from ambient vibration sources
Author :
Swee-Leong Kok ; Ab Rahman, Mohd Fauzi ; Yap, D.F.W. ; Yih Hwa Ho
Author_Institution :
Fac. of Electron. & Comput. Eng., Univ. Teknikal Malaysia Melaka, Durian Tunggal, Malaysia
Abstract :
Due to the fact that the ambient vibration sources are random and unpredictable, therefore a vibration based energy harvesting device is desirable to be able to operate at wider bandwidth in an envelop of frequency range to generate maximum electrical output. In this paper, various ambient vibration from household appliances, machineries, vehicle and moving vehicle were measured and investigated. The second part of the paper will discuss the strategies to harvest these ambient vibration sources. An array of piezoelectric multi-cantilever is proposed to address the issue of single piezoelectric cantilever with high Q-factor. Two configurations of multi-cantilever were fabricated in a form that elevated from the substrate as free-standing structures. One with six cantilevers of constant width but different lengths and another with five cantilevers of constant length but different widths. The measurement and experimental results show a frequency band of 200 Hz to 300 Hz as a common bandwith between the vibration sources and the capability of miniature piezoelectric energy harvester in harvesting maximum electrical energy.
Keywords :
Q-factor; cantilevers; energy harvesting; piezoelectric transducers; vibrations; Q-factor; ambient vibration sources; bandwidth widening; free-standing structures; frequency 200 Hz to 300 Hz; household appliances; piezoelectric based energy harvesting; piezoelectric multicantilever; Acceleration; Arrays; Energy harvesting; Equations; Piezoelectric transducers; Resonant frequency; Vibrations; Energy Harvesting; Free-Standing Structure; Piezoelectric Micro-Power Generator; Random Vibration Sources; Thick-Film;
Conference_Titel :
Computer Applications and Industrial Electronics (ICCAIE), 2011 IEEE International Conference on
Conference_Location :
Penang
Print_ISBN :
978-1-4577-2058-1
DOI :
10.1109/ICCAIE.2011.6162185