A bistable energy harvester for self-powered sensing in rail transport condition monitoring
conference contributionposted on 11.10.2021, 08:57 by Hailing FuHailing Fu, Yuan Zhang, Mengzhou Liu, Yong Qin, Eric M. Yeatman
A bistable vibration energy harvester for rail transport is proposed and developed to harness low-frequency train vibrations for self-powered condition monitoring. The operational vibration data collected from a train is analyzed to identify the design requirements. A free-sliding magnet is placed in a tube with two fixed magnets and limit springs to provide two stable positions for the movable magnet. This bistable behavior enhances the energy harvesting performance and operational bandwidth. A prototype was fabricated and tested using conditions similar to the real train operational conditions. A broad operation bandwidth (20 - 40 Hz) was obtained due to bi-stability. A peak output power of 1.1 mW was measured at 30 Hz and 6g with a 600 \Omega resistive load.
International Exchanges programme (IEC\NSFC\181655) funded by the Royal Society, UK and the National Natural Science Foundation of China
- Mechanical, Electrical and Manufacturing Engineering