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Indirect impact based piezoelectric energy harvester for low frequency vibration
- Indirect impact based piezoelectric energy harvester for low frequency vibration
- Ju S.; Ji C.-H.
- Ewha Authors
- SCOPUS Author ID
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- Journal Title
- 2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015
- Indirect impact; Macro fiber composite; Vibration energy harvesting
- Institute of Electrical and Electronics Engineers Inc.
- This paper presents an impact based piezoelectric vibration energy harvester using freely movable metal spheres as proof mass and an MFC (Macro Fiber Composite) beam as a piezoelectric cantilever. External vibration is transformed into free motion of metal spheres inside the channels and impact between the metal sphere and channel end induces a vibration of the MFC beam to generate electric power. A proof-of-concept device having the form-factor of a conventional wristwatch has been designed and tested to harvest energy from low frequency human-body-induced vibrations. Geometry at both ends of the cavities has been optimized to effectively transmit energy to piezoelectric cantilever and thus achieve a higher output power. For a device having an effective volume of 4.59cm3, maximum peak-to-peak open circuit voltage of 54V and RMS output power of 621μW have been achieved, when the fabricated energy harvester was mounted on a wristwatch and shaken manually. © 2015 IEEE.
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- 엘텍공과대학 > 전자공학과 > Journal papers
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