TY - JOUR AU - 성태현 DA - 2015/06 PY - 2015 UR - http://www.sciencedirect.com/science/article/pii/S1567173915000474 UR - http://hdl.handle.net/20.500.11754/25591 AB - 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. PB - ELSEVIER SCIENCE BV KW - Piezoelectric tile KW - Mechanical resonance KW - Frequency matching KW - Impedance matching TI - Designing and manufacturing a piezoelectric tile for harvesting energy from footsteps IS - 6 VL - 15 DO - 10.1016/j.cap.2015.02.009 T2 - CURRENT APPLIED PHYSICS ER -