Vibration Energy Harvesting Characterization of 1 cm2 Poly(vinylidene fluoride) Generators in Vacuum
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概要
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In this study, poly(vinylidene fluoride) (PVDF) was used as a piezoelectric element to fabricate small size (two-dimensional area ${<}1$ cm2) generators with low resonant frequency (about 100 Hz) for matching the frequency of vibration sources. To clarify the effect of the air damping on the vibration energy harvesting, PVDF generators were investigated in three measurement conditions: “unpackaged in air”, “packaged in air”, and “unpackaged in vacuum”. It was found that the output power of generators “unpackaged in vacuum” was almost twice that of generators “packaged in air” at $0.5g$ acceleration. With the increase in vibration acceleration, the output power of generators “unpackaged in vacuum” rapidly increased in a quadratic relationship with the acceleration at low acceleration level, and then the increasing ratio decreased at high acceleration. At $4.31g$ acceleration, the output power reached 100.833 μW.
- 2011-09-25
著者
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Kuwano Hiroki
Department Of Nano-mechanics Faculty Of Engineering Tohoku University
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Cao Ziping
Department of Materials Science and Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
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Cao Ziping
Department of Nanomechanics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
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Zhang Jinya
Department of Nanomechanics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
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