Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Analysis of the Failure Position in the Unimorph Cantilever for Energy Harvesting

에너지 하베스팅용 압전 캔틸레버의 위치에 따른 파단점 분석

  • Kim, Hyung-Chan (Thin Film Materials Research Center, Korea Institute of Science & Technology) ;
  • Jeong, Dae-Yong (Thin Film Materials Research Center, Korea Institute of Science & Technology) ;
  • Yoon, Seok-Jin (Thin Film Materials Research Center, Korea Institute of Science & Technology) ;
  • Kim, Hyun-Jai (Thin Film Materials Research Center, Korea Institute of Science & Technology)
  • 김형찬 (한국과학기술연구원 박막재료연구센타) ;
  • 정대용 (한국과학기술연구원 박막재료연구센타) ;
  • 윤석진 (한국과학기술연구원 박막재료연구센타) ;
  • 김현재 (한국과학기술연구원 박막재료연구센타)
  • Published : 2007.02.27
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Abstract

Energy harvesting from the vibration through the piezoelectric effect has been studied for powering the wireless sensor node. As piezoelectric unimorph cantilever structure can transfer low vibration to large displacement, this structure was commonly deployed to harvest electric energy from vibrations. Piezoelectric unimorph structure was composed of small stiff piezoelectric ceramic on the large flexible substrate. As there is the large Young's modulus difference between the flexible substrate and stiff piezoelectric ceramic, flexible substrate could not homogeneously transfer the vibration to stiff piezoelectric ceramic. As a result, most piezoelectric ceramics had been broken at the certain point. We measured and analyzed the stress distribution on the piezoelectric ceramic on the cantilever.

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References

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  1. Multilayer piezoelectric energy scavenger for large current generation vol.23, pp.2-4, 2009, https://doi.org/10.1007/s10832-008-9439-9