TY - GEN
T1 - Analysis of inhomogeneous stress distribution in the piezoelectric ceramics of unimorph cantilever for energy harvesting
AU - Jeong, Dae Yong
AU - Song, Hyun Cheol
AU - Kim, Hyeong Chan
AU - Kang, Chong Yun
AU - Kim, Hyun Jai
AU - Yoon, Seok Jin
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
N2 - Energy harvesting from the vibration through the piezoelectric effect has been studied for powering the wireless sensor node. As piezoelectric unimorph transducer 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 the stiff piezoelectric ceramic. As a result, most piezoelectric ceramics had been broken at the certain point. Even though the same stress was applied to unimorph cantilever at the end of the unimorph cantilever, there was the difference in output voltages depending on the potion of ceramics. The ratio of the lowest and highest voltage was around 2.4, which reveals the inhomogeneous stress distribution in ceramics.
AB - Energy harvesting from the vibration through the piezoelectric effect has been studied for powering the wireless sensor node. As piezoelectric unimorph transducer 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 the stiff piezoelectric ceramic. As a result, most piezoelectric ceramics had been broken at the certain point. Even though the same stress was applied to unimorph cantilever at the end of the unimorph cantilever, there was the difference in output voltages depending on the potion of ceramics. The ratio of the lowest and highest voltage was around 2.4, which reveals the inhomogeneous stress distribution in ceramics.
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U2 - 10.1109/ISAF.2007.4393403
DO - 10.1109/ISAF.2007.4393403
M3 - Conference contribution
AN - SCOPUS:51349131530
SN - 1424413338
SN - 9781424413331
T3 - IEEE International Symposium on Applications of Ferroelectrics
SP - 790
EP - 791
BT - 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
T2 - 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
Y2 - 27 May 2007 through 31 May 2007
ER -