基于MFC的压电振动能量采集器

doi:10.16180/j.cnki.issn1007-7820.2025.03.003

Abstract

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

CLC Number:

TN384

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.

Figures/Tables 13

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References 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

Research on MFC-Based Piezoelectric Vibration Energy Harvester

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