A vibration powered wireless mote on the Forth Road Bridge

15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Jia, Yu^1,2 ; Yan, Jize^2 ; Feng, Tao^2 ; Du, Sijun^2 ; Fidler, Paul^2 ; Soga, Kenichi^2 ; Middleton, Campbell^2 ; Seshia, Ashwin A.^2

Faculty of Science and Engineering, University of Chester, Thornton Science Park, Chester

CH2 4NU, United Kingdom^1

Department of Engineering, University of Cambridge, Trumpington Street, Cambridge

CB2 1PZ, United Kingdom^2

关键词: Ambient vibrations;    Electromagnetic harvesters;    Parametric resonance;    Traffic induced vibrations;    Vibration energy harvesters;    Vibration profiles;    Wireless structural health monitoring systems;    Wireless transmissions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/660/1/012094/pdf
DOI  :  10.1088/1742-6596/660/1/012094

来源: IOP

【 摘 要 】

The conventional resonant-approaches to scavenge kinetic energy are typically confined to narrow and single-band frequencies. The vibration energy harvester device reported here combines both direct resonance and parametric resonance in order to enhance the power responsiveness towards more efficient harnessing of real-world ambient vibration. A packaged electromagnetic harvester designed to operate in both of these resonant regimes was tested in situ on the Forth Road Bridge. In the field-site, the harvester, with an operational volume of ∼126 cm3, was capable of recovering in excess of 1 mW average raw AC power from the traffic-induced vibrations in the lateral bracing structures underneath the bridge deck. The harvester was integrated off-board with a power conditioning circuit and a wireless mote. Duty- cycled wireless transmissions from the vibration-powered mote was successfully sustained by the recovered ambient energy. This limited duration field test provides the initial validation for realising vibration-powered wireless structural health monitoring systems in real world infrastructure, where the vibration profile is both broadband and intermittent.