TY - JOUR
T1 - Lead-Free (K,Na)NbO3 Impact-Induced-Oscillation Microenergy Harvester
AU - Van Minh, Le
AU - Hara, Motoaki
AU - Kuwano, Hiroki
N1 - Funding Information:
This work was supported in part by the Project Research of a Nano-Energy System Creation through the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), under Grant 18GS0203; in part by the Center of Innovation Science and Technology-Based Radical Innovation and Entrepreneurship Program, Tohoku University, Sendai, Japan, through MEXT; and in part by the Tohoku University Research and Development Center of Excellence for Integrated Microsystems through MEXT. Subject Editor A. Zhang. The authors are grateful to Dr. Fumimasa Horikiri and Dr. Kenji Shibata at Hitachi Metals, Ltd., for their excellent advice and support. Part of this work was performed at the Micro/Nano-Machining Research and Education Center, Tohoku University, Japan.
Publisher Copyright:
© 1992-2012 IEEE.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - We developed microenergy harvesters using impact-induced oscillation to scavenge electrical power from low frequency (<200 Hz) and random environmental vibrations. The microharvesters comprised a (K,Na)NbO3/Si composite cantilever and a cylindrical cavity to guide a metal ball to perpendicularly strike the cantilever. Through ball impact, oscillation of the cantilever was induced, generating electrical power at ambient vibration frequencies from 20 to 150 Hz. The contact time of ball impact was identified as a key parameter for power enhancement and was effectively tuned by adjusting the impact position on the triangular cantilever. The experimental output power when the impact position was at the base of the cantilever was 34.6 nW. This value is tenfold higher than that from conventional devices in which the ball strikes the tip of the cantilever. [2015-0063].
AB - We developed microenergy harvesters using impact-induced oscillation to scavenge electrical power from low frequency (<200 Hz) and random environmental vibrations. The microharvesters comprised a (K,Na)NbO3/Si composite cantilever and a cylindrical cavity to guide a metal ball to perpendicularly strike the cantilever. Through ball impact, oscillation of the cantilever was induced, generating electrical power at ambient vibration frequencies from 20 to 150 Hz. The contact time of ball impact was identified as a key parameter for power enhancement and was effectively tuned by adjusting the impact position on the triangular cantilever. The experimental output power when the impact position was at the base of the cantilever was 34.6 nW. This value is tenfold higher than that from conventional devices in which the ball strikes the tip of the cantilever. [2015-0063].
KW - Energy harvesting
KW - MEMS
KW - lead-free piezoelectric
KW - piezoelectric devices
KW - piezoelectric energy harvester
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U2 - 10.1109/JMEMS.2015.2451141
DO - 10.1109/JMEMS.2015.2451141
M3 - Article
AN - SCOPUS:84959558252
SN - 1057-7157
VL - 24
SP - 1887
EP - 1895
JO - Journal of Microelectromechanical Systems
JF - Journal of Microelectromechanical Systems
IS - 6
M1 - 7163501
ER -