Piezoelectric Vibration Energy Harvester Using Indirect Impact of Springless Proof Mass
- 등재 SCOPUS
- 발행기관 Institute of Physics Publishing
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000125514
- 본문언어 영어
- Published As http://dx.doi.org/10.1088/1742-6596/660/1/012122
초록/요약
This paper presents an impact-based piezoelectric vibration energy harvester using freely movable spherical proof mass and MFC (Macro Fiber Composite) beams as piezoelectric cantilevers. When external vibration is applied, a metal sphere moves freely along the channel and collides with both ends of the cavity, which induces the vibration of parallel- connected MFCs and generates electric power. A proof-of-concept device having the form- factor of a wristwatch has been designed and tested. Moreover, spherical proof mass made of different materials has been tested to analyze the relationship between output power, long-term reliability, and audible noise level during operation. Maximum peak-to-peak open circuit voltage of 41.2V and average power of 908.7 μW have been obtained in response to a 3g vibration at 17Hz for device with parallel-connected MFC beams. © Published under licence by IOP Publishing Ltd.
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