Design, analysis and testing of a piezoelectric flex transducer for harvesting bio-kinetic energy
Journal of Physics: Conference Series
Open access article. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence: http://creativecommons.org/licenses/by/3.0/. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd.
The increasing prevalence of low power consuming electronics brings greater potential to mobile energy harvesting devices as a possible power source. A new piezoelectric energy harvesting device, called the piezoelectric flex transducer (PFT), is presented and developed. A Finite Element Model (FEM) was developed to design and analyse the PFT. The PFT consists of a piezoelectric element sandwiched between substrate layers and metal endcaps that are able to amplify the axial force on the piezoelectric element. Based on the concept of the Cymbal transducer, the PFT can withstand higher forces, was retrofitted into a shoe and used to power a wireless sensor module whilst the subject with a body weight of 760N was wearing the shoe and ran at 3.1mph (1.4HZ on shoe), the PFT produced an average maximum power of 2.5mW (over 2M? load).
The authors gratefully acknowledge support from SmartWater: “Smart Sensor Network with energy harvesting for real time monitoring in urban water infrastructure” (FP7-People-2-12-IRSES project, EC318985) and to Wojczech Suder at the Welding Institute (Cranfield University) for welding the PFT.
This is the final version of the article. Available from IOP Publishing via the DOI in this record.
Vol. 476, conference 1, article 012047