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Micromachines 2018, 9(12), 629; https://doi.org/10.3390/mi9120629

A Self-Powered Engine Health Monitoring System Based on L-Shaped Wideband Piezoelectric Energy Harvester

1
Key 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
2
Department of Electro-Mechanic Engineering, Chongqing College of Electronic Engineering, Chongqing 401331, China
3
Chongqing Acoustic-Optic-Electric Corporation, China Electronic Technology Group Corporation, Chongqing 400060, China
4
Science and Technology on Analog Integrated Circuit Laboratory, Chongqing 401332, China
*
Author to whom correspondence should be addressed.
Received: 29 October 2018 / Revised: 21 November 2018 / Accepted: 23 November 2018 / Published: 28 November 2018
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Abstract

Engine health monitoring is very important to maintain the life of engines, and the power supply to sensor nodes is a key issue that needs to be solved. The piezoelectric vibration energy harvester has attracted much attention due to its obvious advantages in configuration, electromechanical conversion efficiency, and output power. However, the narrow bandwidth has restricted its practical application. A self-powered engine health monitoring system was proposed in this paper, and an L-shaped wideband piezoelectric energy harvester was designed and implemented. The L-shaped beam-mass structure and the piezoelectric bimorph cantilever beam structure was combined to form the wideband piezoelectric energy harvester configuration, which realized effective output at both resonance points. The theoretical model and finite element simulation analysis of the wideband piezoelectric energy harvester were proposed and the parameters were optimized based on that to meet the requirement of the vibration frequency of the engine. The experimental results show that the proposed energy harvester can be applied into the automobile engine health monitoring system. Engine signal analysis results also demonstrate that the proposed system can be used for engine health monitoring. View Full-Text
Keywords: engine health monitoring; L-shaped wideband vibration energy harvester; power management; wireless sensors nodes engine health monitoring; L-shaped wideband vibration energy harvester; power management; wireless sensors nodes
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Shi, S.; Yue, Q.; Zhang, Z.; Yuan, J.; Zhou, J.; Zhang, X.; Lu, S.; Luo, X.; Shi, C.; Yu, H. A Self-Powered Engine Health Monitoring System Based on L-Shaped Wideband Piezoelectric Energy Harvester. Micromachines 2018, 9, 629.

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