基于MFC的压电振动能量采集器  

Research on MFC-Based Piezoelectric Vibration Energy Harvester

作　　者：何悦 袁天辰[1] 杨俭[1] 宋瑞刚[1] HE Yue;YUAN Tianchen;YANG Jian;SONG Ruigang(School of Urban Rail Transit,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学城市轨道交通学院,上海201620

出　　处：《电子科技》2025年第3期16-21,共6页Electronic Science and Technology

基　　金：国家自然科学基金(11802170)。

摘　　要：机械振动是环境中常见的运动形式,对其进行能量采集可以满足无线传感节点等低功耗器件的用电需求。压电式发电具有良好的应用前景,针对压电式发电因压电材料的不足而受到限制问题,文中设计了一种基于MFC(Macro Fiber Composite)的压电振动能量采集器,利用圆环型结构的大变形振动和MFC良好的柔韧性实现了低频振动能量采集。文中研究了MFC压电片在圆环不同位置的输出性能,结果显示当MFC压电片与导柱夹角为97°时,采集器的输出电压达到峰值。通过有限元仿真和实验对比验证发现采集器的共振频率为3.8 Hz,在0.3 g激励下,共振时实验样机的输出电压为6.60 V,功率达到0.17 mW,仿真和实验结果基本一致。Mechanical vibration is a common form of motion in the environment,and energy harvesting of it can satisfy the power needs of low-power devices such as wireless sensor nodes.Piezoelectric power generation has a good application prospect.In view of the problem that piezoelectric power generation is limited by the lack of piezoelectric materials,this study designs a piezoelectric vibration energy harvester based on MFC(Macro Fiber Composite),which utilizes the large deformation vibration of the circular structure and the good flexibility of MFC to realize the low-frequency vibration energy harvesting.The output performance of the MFC piezoelectric sheet at different positions of the circular ring is investigated,and the results show that the output voltage of the collector reaches the peak value when the angle between the MFC piezoelectric sheet and the guide post is 97°.Through finite element simulation and experimental comparison verification,it is found that the resonance frequency of the collector is 3.8 Hz,and the output voltage of the experimental prototype at resonance is 6.60 V and the power reaches 0.17 mW at 0.3 g excitation,which is basically in line with the simulation and experimental results.

关 键 词：能量采集 MFC 频域响应 有限元分析 压电效应 低频谐振 COMSOL 压电材料 

分 类 号：TN384[电子电信—物理电子学]