An energy harvesting floating slab track for self-powered monitoring sensors in urban rail transit systems

Yunfeng Liu, Yuan Wang, Yanyan Gao, Kai Zhang, Yiyan Zhang, Hao Li and Lingfei Qi

Energy, 2025, vol. 330, issue C

Abstract: Providing long-term uninterrupted power supply for structural health monitoring sensors embedded in floating plate tracks is still a challenging problem. Therefore, this study develops a novel energy harvesting device incorporating a double ratchet-pawl structure. The structure of the proposed system contains four units: motion transformation unit (MTU), speed amplification unit (SAU), energy transformation unit (ETU), and energy storage unit (ESU). The series-connected configuration of four units transforms floating slab kinetic energy into electricity, which is then capacitor-stored to energize sensing modules. The developed vibration energy harvester (VEH) achieves a peak damping force of 104.4 N in experimental validation. Under 3.5 mm and 2.5 Hz excitation, the system achieves 0.66 W peak power output at optimal loads. The DC steady-state voltage of the proposed system reaches several volts, while the output power is on the order of mW. It has sufficient potential to power structural health monitoring sensors embedded in floating plate tracks.

Keywords: Urban rail transit system; Floating slab track; Vibration energy harvesting; Internal ratchet pawl; Self-power (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:330:y:2025:i:c:s0360544225024375

DOI: 10.1016/j.energy.2025.136795

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