Design, analysis and testing of a piezoelectric flex transducer for harvesting bio-kinetic energy

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Daniels, A.^1 ; Zhu, M.^2 ; Tiwari, A.^1

Department of Manufacturing and Materials, Cranfield University, Bedfordshire, MK43 0AL, United Kingdom^1

College of Engineering, Mathematics and Physical Sciences, Exeter University, Exeter, EX4 4QF, United Kingdom^2

关键词: Analysis and testing;    Cymbal transducer;    Energy harvesting device;    Maximum power;    Piezoelectric elements;    Piezoelectric energy harvesting;    Substrate layers;    Wireless sensor;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012047/pdf
DOI  :  10.1088/1742-6596/476/1/012047

来源: IOP

【 摘 要 】

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 2MΩ load).