Designing and manufacturing a piezoelectric tile for harvesting energy from footsteps

Title
Designing and manufacturing a piezoelectric tile for harvesting energy from footsteps
Authors
성태현
Keywords
Piezoelectric tile; Mechanical resonance; Frequency matching; Impedance matching
Issue Date
2015-06
Publisher
ELSEVIER SCIENCE BV
Citation
CURRENT APPLIED PHYSICS, v. 15, NO 6, Page. 669-674
Abstract
The objective of this research is to design a piezoelectric tile for harvesting energy from footsteps and to optimize the system for harvesting maximum energy. Because piezoelectric modules easily break when directly subjected to energy generated by human movements, we designed a tile that employs indirect energy transmission using springs and a tip mass. We aimed at matching the mechanical resonance frequency of the tile with that of the piezoelectric modules. The resonance frequency of a piezoelectric module with a 10-g tip mass was almost similar to the vibration frequency of the tile at 22.5 Hz when we dropped an 80-g steel ball from a 1-m height. We performed impedance matching and realized a matching value of 15 kU. Under these optimal mechanical and electrical conditions, we harvested 770-mu W RMS and 55-mW peak output power. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S1567173915000474http://hdl.handle.net/20.500.11754/25591
ISSN
1567-1739; 1878-1675
DOI
http://dx.doi.org/10.1016/j.cap.2015.02.009
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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