Paper
22 December 2015 Development of the magnetic force-induced dual vibration energy harvester using a unimorph cantilever
M. Umaba, E. Nakamachi, Y. Morita
Author Affiliations +
Proceedings Volume 9668, Micro+Nano Materials, Devices, and Systems; 96684U (2015) https://doi.org/10.1117/12.2202337
Event: SPIE Micro+Nano Materials, Devices, and Applications, 2015, Sydney, New South Wales, Australia
Abstract
In this study, a high frequency piezoelectric energy harvester converted from the human low vibrated motion energy was newly developed. This hybrid energy harvester consists of the unimorph piezoelectric cantilever, the pendulum and a pair of permanent magnets. One magnet was attached at the edge of cantilever, and the counterpart magnet at the edge of pendulum. The mechanical energy provided through the human walking motion, which is a typical ubiquitous existence of vibration, is converted to the electric energy via the piezoelectric unimorph cantilever vibration. At first, we studied the energy convert mechanism and analyze the performance of novel energy harvester, where the resonance free vibration of unimorph piezoelectric cantilever generated a high electric power. Next, we equipped the counterpart permanent magnet at the edge of pendulum, which vibrates with a very low frequency caused by the human walking. Then the counterpart magnet was set at the edge of unimorph piezoelectric cantilever, which vibrated with a high frequency. This low-to-high frequency convert “dual vibration system” can be characterized as an enhanced energy harvester. We examined and obtained average values of voltage and power in this system, as 8.31 mV and 0.33 μW. Those results show the possibility to apply for the energy harvester in the portable and implantable Bio-MEMS devices.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Umaba, E. Nakamachi, and Y. Morita "Development of the magnetic force-induced dual vibration energy harvester using a unimorph cantilever", Proc. SPIE 9668, Micro+Nano Materials, Devices, and Systems, 96684U (22 December 2015); https://doi.org/10.1117/12.2202337
Lens.org Logo
CITATIONS
Cited by 1 scholarly publication.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Magnetism

Capacitance

Resistance

Power supplies

Capacitors

Electrodes

Motion analysis

Back to Top