• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2026, Vol. 62 ›› Issue (11): 301-312.doi: 10.3901/JME.260596

Previous Articles    

Design and Evaluation of Piezoelectric-electromagnetic Hybrid Energy Harvester for Energy Harvesting of Micro-displacement Vibration in Train Tracks

SUN Wei1,2, WANG Bin1, CHAI Ruibo1, YANG Guang1, LI Haoyan1, LI Xiaokun1, QU Changrong1, ZHANG Bin1,2   

  1. 1. School of Airspace Science and Engineering, Shandong University, Weihai 264209;
    2. Preparation and Application of Aerospace High-Performance Composite Materials, Future Industry Laboratory of Higher Education Institutions in Shandong Province, Shandong University, Weihai 264209
  • Received:2024-10-10 Revised:2025-09-03 Published:2026-07-29

Abstract: The vibration energy generated when the railway passes through is abundant, which can be used as the energy source of the wireless sensor network for the monitoring of the railway infrastructure. However, the railway track vibration is small in amplitude and low in frequency, and the vibration energy is difficult to be harvested. Considering the characteristics of track vibration and its environment, a micro-displacement amplified piezoelectric-electromagnetic hybrid energy harvester (MDAP-EHEH) for energy harvesting of the railway track's small vibration is proposed. And the lever structure is designed to amplify the track's micro-displacement for a more efficient energy harvesting, and external fixed magnets are added in the energy harvesting system to introduce system nonlinearities. Energy output experiments are designed to test the output performance of the energy harvester, and the results show that the displacement amplification effect of MDAP-EHEH can realize a significant increase in the efficiency of vibration energy harvesting, and the introduction of nonlinearities makes the effective bandwidth of energy harvesting of the energy harvester increase by 133%. The experiments of building wireless sensing network for energy supply prove that the self-powered wireless sensing system can realize the effective monitoring of track vibration data. The study verifies the efficient output performance of MDAP-EHEH, which possesses great potential for powering wireless sensor networks for railway monitoring.

Key words: micro-displacement, hybrid energy harvesting, impedance matching, self-powered wireless sensor nodes

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