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.
CITATION STYLE
Kim, H. C., Song, H. C., Jeong, D. Y., Kim, H. J., Yoon, S. J., & Ju, B. K. (2007). Frequency tuning of unimorph cantilever for piezoelectric energy harvesting. Korean Journal of Materials Research, 17(12), 660–663. https://doi.org/10.3740/MRSK.2007.17.12.660
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