一种基于L形宽带压电能量采集器的自供电发动机健康监测系统。

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

作者信息

Shi Shuxin, Yue Qiuqin, Zhang Zuwei, Yuan Jun, Zhou Jielin, Zhang Xiaokun, Lu Shan, Luo Xin, Shi Chongyu, Yu Hua

机构信息

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.

Department of Electro-Mechanic Engineering, Chongqing College of Electronic Engineering, Chongqing 401331, China.

出版信息

Micromachines (Basel). 2018 Nov 28;9(12):629. doi: 10.3390/mi9120629.

DOI:10.3390/mi9120629

PMID:30487394

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6315351/

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.

摘要

发动机健康监测对于维持发动机寿命非常重要，而传感器节点的电源供应是一个需要解决的关键问题。压电振动能量采集器因其在结构、机电转换效率和输出功率方面的明显优势而备受关注。然而，其带宽较窄限制了它的实际应用。本文提出了一种自供电发动机健康监测系统，并设计并实现了一种L形宽带压电能量采集器。将L形梁质量结构和压电双晶片悬臂梁结构相结合，形成宽带压电能量采集器配置，在两个共振点都实现了有效输出。提出了宽带压电能量采集器的理论模型和有限元模拟分析，并在此基础上对参数进行了优化，以满足发动机振动频率的要求。实验结果表明，所提出的能量采集器可应用于汽车发动机健康监测系统。发动机信号分析结果也表明，所提出的系统可用于发动机健康监测。