使用万向节结构的低频多向压电振动能量收集器

IF 2.4 3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Junwu Kan, Silei Wu, Yazhi Lin, Zhenli Kuang, Wenchao Wu, Zhenxin Cao, Zhonghua Zhang
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引用次数: 0

摘要

近十年来,利用压电机制采集振动能量为无线传感器供电已引起广泛关注。本文提出了一种使用万向节结构的低频多向压电振动能量收集器(LM-PVEH)。与传统的压电振动能量收集器不同,LM-PVEH 利用摆锤代替了典型压电横梁中的校准质量,并采用万向节间接拨动压电横梁,确保横梁只承受压应力。利用万向节的多向旋转特性,收割机可以有效地回收多向能量。为了验证原理的可行性,并研究结构参数对 LM-PVEH 发电性能的影响,研究人员进行了理论分析和实验测试。结果表明,LM-PVEH 在不同振动方向上表现出不同的发电特性。LM-PVEH 的共振频率可通过调整验证质量和质量距离进行有效调整,以适应低频环境。在 7.3 Hz 频率下,负载电阻为 300 kΩ 时,所提出的收割机可获得 4.99 mW 的最大功率。LM-PVEH 可为 100 个 LED、一个温度传感器和一个发射模块供电。此外,利用人体运动为计算器供电的成功演示凸显了所建议的采集器的实际应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A low-frequency multidirectional piezoelectric vibration energy harvester using a universal joint structure
Vibration energy harvesting using piezoelectric mechanism has attracted much attention for powering wireless sensors over the last decade. This paper proposes a low-frequency multidirectional piezoelectric vibration energy harvester (LM-PVEH) using a universal joint structure. Unlike conventional PVEHs, LM-PVEH utilized a pendulum instead of a proof mass in a typical piezoelectric beam and employed a universal joint to indirectly pluck the piezoelectric beam, ensuring the beam was only subjected to compressive stress. With the multidirectional rotation characteristic of the universal joint, the harvester efficiently scavenged multidirectional energy. To verify the feasibility of principle and investigate the effect of structural parameters on the power generation performance of LM-PVEH, theoretical analysis and experimental test were conducted. The results demonstrated that LM-PVEH exhibited different power-generating characteristics in various vibration directions. The resonant frequency of LM-PVEH could be efficiently tuned by adjusting proof mass and mass distance to accommodate low-frequency environments. The proposed harvester achieved a maximum power of 4.99 mW with the load resistance of 300 kΩ at 7.3 Hz. The LM-PVEH could power 100 LEDs, a temperature sensor, and a transmitting module. Additionally, the successful demonstration of powering a calculator from human motion highlights the practical application of the proposed harvester.
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来源期刊
Journal of Intelligent Material Systems and Structures
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.
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