Frequency tuning of unimorph cantilever for piezoelectric energy harvesting

Hyung Chan Kim, Hyun Cheol Song, Dae Yong Jeong, Hyun J. Kim, Seok J. Yoon, Byeong Kwon Ju

Research output: Contribution to journalArticle

1 Citation (Scopus)


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.

Original languageEnglish
Pages (from-to)660-663
Number of pages4
JournalKorean Journal of Materials Research
Issue number12
Publication statusPublished - 2007 Dec 1


  • Energy harvesting
  • Frequency tuning
  • Piezoelectric

ASJC Scopus subject areas

  • Materials Science(all)

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