Harvesting vibration energy through a cantilever beam with enhanced harvesting capability

IF 2.4 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Intelligent Material Systems and Structures Pub Date : 2024-02-27 DOI:10.1177/1045389x241233354

Jishuo Wang, Di Yuan, Qin Ying, Bao Li, Weifeng Yuan

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引用次数: 0

Abstract

Piezoelectric energy harvester (PEH) is being world widely studied by many researchers due to their excellent advantages over batteries. Therefore, how to improve the capability of energy harvesting has become a hot research topic. In this study, based on the theory that the electromechanical coupling coefficient is proportional to the difference of mode shape slopes at the two ends of a piezoelectric sheet made of macro fiber composite, a modified cantilever structure consisting of two segments is proposed. The piezoelectric sheet is affixed on the segment close to the fixed end, while the segment containing the free end is rotated by 90° along its axial direction. The mode shape of the cantilever structure is calculated based on the Euler-Bernoulli beam theory. Prototypes of the conventional and modified PEHs are fabricated and tested. Compared to the conventional one, the experimental result of the modified PEH demonstrates that the electromechanical coupling coefficient is enhanced by 600%, and the output power is increased by more than 300%. The proposed PEH is simple, highly efficient, and easy-realized.

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通过悬臂梁采集振动能量，增强采集能力

压电能量收集器（Piezoelectric energy harvester，PEH）因其优于电池的出色性能而受到世界各国研究人员的广泛关注。因此，如何提高能量收集能力已成为一个热门研究课题。本研究基于机电耦合系数与宏纤维复合材料压电片两端模态斜率之差成正比的理论，提出了一种由两段组成的改进型悬臂结构。压电片固定在靠近固定端的部分上，而包含自由端的部分则沿其轴向旋转 90°。悬臂结构的模态形状是根据欧拉-伯努利梁理论计算得出的。制作并测试了传统和改进型 PEH 的原型。与传统 PEH 相比，改进型 PEH 的实验结果表明机电耦合系数提高了 600%，输出功率提高了 300% 以上。所提出的 PEH 简单、高效、易于实现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Intelligent Material Systems and Structures 工程技术-材料科学：综合

CiteScore

5.40

自引率

11.10%

发文量

126

审稿时长

4.7 months

期刊介绍： The Journal of Intelligent Materials Systems and Structures is an international peer-reviewed journal that publishes the highest quality original research reporting the results of experimental or theoretical work on any aspect of intelligent materials systems and/or structures research also called smart structure, smart materials, active materials, adaptive structures and adaptive materials.