Bandwidth Widening Strategies for Piezoelectric Based Energy Harvesting from Ambient Vibration Sources
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 vibra...
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| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2011
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/4157/1/Bandwidth_Widening_Strategies_for_Piezoelectric.pdf http://eprints.utem.edu.my/id/eprint/4157/ |
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| Summary: | 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 freestanding 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. |
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