Piezoelectric energy harvesting from our surrounding vibration has been studied for driving the wireless sensor node. To change the vibration energy into the electric-energy efficiently, the natural frequency of cantilever needs to be adjusted to that of a vibration source. When adding 6.80g mass on the end of the fabricated cantilever, a natural fi-equency shifts from 136 Hz into 49.5 Hz. In addition, electro-mechanical coupling factor increased from 10.20% to 11.90% and resulted in the 1.18 times increase of maximum output power.
|Number of pages||4|
|Journal||Korean Journal of Materials Research|
|Publication status||Published - 2007 Dec|
- Energy harvesting
- Frequency tuning
ASJC Scopus subject areas
- Materials Science(all)