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A Self-Powered Engine Health Monitoring System Based on L-Shaped Wideband Piezoelectric Energy Harvester
Shuxin Shi1, Qiuqin Yue2, Zuwei Zhang3
1Key Laboratory for Optoelectronic Technology & Systems, Ministry of Education of China, Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, China. 20160802007t@cqu.edu.cn.
Micromachines
|November 30, 2018
Summary
A novel L-shaped piezoelectric vibration energy harvester powers engine health monitoring systems. This wideband device effectively captures vibrational energy, enabling self-powered sensor nodes for improved engine diagnostics and longevity.
Area of Science:
- Mechanical Engineering
- Materials Science
- Electrical Engineering
Background:
- Engine health monitoring (EHM) is crucial for engine longevity.
- Powering sensor nodes in EHM systems presents a significant challenge.
- Piezoelectric vibration energy harvesters (PVEHs) offer advantages but suffer from narrow bandwidth limitations.
Purpose of the Study:
- To propose a self-powered EHM system using a wideband PVEH.
- To design and implement an L-shaped wideband PVEH for engine vibrations.
- To address the narrow bandwidth issue of conventional PVEHs.
Main Methods:
- Combined L-shaped beam-mass and piezoelectric bimorph cantilever structures.
- Theoretical modeling and finite element simulation for parameter optimization.
- Experimental validation of the wideband PVEH for engine applications.
Main Results:
- The L-shaped PVEH demonstrated effective energy harvesting at multiple resonance frequencies.
- Optimized parameters aligned the harvester's frequency response with typical engine vibrations.
- Experimental results confirmed the harvester's suitability for automobile EHM.
Conclusions:
- The developed wideband PVEH enables self-powered EHM systems.
- The L-shaped configuration overcomes bandwidth limitations of traditional harvesters.
- The system is validated for practical application in automobile engine health monitoring.
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