基于MFC的压电振动能量采集器

doi:10.16180/j.cnki.issn1007-7820.2025.03.003

电子科技 ›› 2025, Vol. 38 ›› Issue (3): 16-21.doi: 10.16180/j.cnki.issn1007-7820.2025.03.003

基于MFC的压电振动能量采集器

何悦, 袁天辰(), 杨俭, 宋瑞刚

上海工程技术大学城市轨道交通学院,上海 201620

收稿日期:2023-08-08 修回日期:2023-09-12 出版日期:2025-03-15 发布日期:2025-03-11
通讯作者: 袁天辰(1988-),男, E-mail: ytcshanghai@126.com,博士,副教授。研究方向:机械振动、非线性振动、环境振动能量采集与利用、超材料结构的设计和振动分析。
作者简介:何悦(1999-),女,硕士研究生。研究方向:压电能量俘获。
杨俭(1962-),男,博士,教授。研究方向:高速铁路铁路结构的智能监测、机电装备可再生能量回收技术。
基金资助:
国家自然科学基金(11802170)

Research on MFC-Based Piezoelectric Vibration Energy Harvester

HE Yue, YUAN Tianchen(), YANG Jian, SONG Ruigang

School of Urban Rail Transit,Shanghai University of Engineering Science,Shanghai 201620,China

Received:2023-08-08 Revised:2023-09-12 Online:2025-03-15 Published:2025-03-11
Supported by:
National Natural Science Foundation of China(11802170)

摘要/Abstract

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0.3g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。

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

Abstract:

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 0.3g excitation, which is basically in line with the simulation and experimental results.

Key words: energy harvesting, MFC, frequency domain response, finite element analysis, piezoelectric effect, low frequency resonance, COMSOL, piezoelectric materials

中图分类号:

TN384

何悦, 袁天辰, 杨俭, 宋瑞刚. 基于MFC的压电振动能量采集器[J]. 电子科技, 2025, 38(3): 16-21.

HE Yue, YUAN Tianchen, YANG Jian, SONG Ruigang. Research on MFC-Based Piezoelectric Vibration Energy Harvester[J]. Electronic Science and Technology, 2025, 38(3): 16-21.

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参考文献 19

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名称	几何尺寸/mm
压电片	28.0×7.0×0.3
底座	84×84×10
圆环	R=79
中心质量块	R=30,h=30

电极尺寸		压电纤维尺寸		环氧树脂尺寸
宽度/mm	间距/mm	宽度/mm	高度/mm	宽/mm	高/mm
0.1	0.5	0.4	0.3	0.2	0.3

材质	密度ρ/kg·m^-3	杨氏模量E/Pa	泊松比
金属铜	8 960	1.2×10¹¹	0.34
环氧树脂	1 960	4×10⁹	0.38
树脂	1 250	1.03×10⁵	0.30
金属钢	7 850	2×10¹³	0.30

粘贴位置分布	角度θ/(°)
位置1	17
位置2	33
位置3	49
位置4	65
位置5	81
位置6	97
位置7	113
位置8	129
位置9	145

MFC位置	输出电压/V
MFC位置	仿真结果/V	实验结果/V
位置1(17°)	3.40	2.92
位置2(33°)	1.00	2.64
位置3(49°)	1.76	3.52
位置4(65°)	2.43	3.56
位置5(81°)	4.79	4.56
位置6(97°)	6.70	6.60
位置7(113°)	5.69	4.10
位置8(129°)	2.41	1.88
位置9(145°)	3.15	3.64

基于MFC的压电振动能量采集器

Research on MFC-Based Piezoelectric Vibration Energy Harvester

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