Design, fabrication and characterization of a wind-isolated galloping energy harvester via an embedded piezoelectric transducer

IF 3.1 3区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Mechatronics Pub Date : 2024-02-20 DOI:10.1016/j.mechatronics.2024.103147

Junwu Kan , Shijie Lin , Jin Wang , Kai Wang , Yiqun Gu , Shuyun Wang , Fanxu Meng , Zhonghua Zhang

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引用次数: 0

Abstract

Harvesting energy from wind-induced vibration utilizing piezoelectric mechanism has attracted much attention for enabling energy-autonomous wireless sensor systems over the past decade. To offer a promising solution for low reliability, poor environmental adaptability and narrow operating bandwidth of existing piezoelectric wind energy harvesters, a wind-isolated galloping energy harvester with an embedded piezoelectric transducer (EPT-WGEH) is proposed in this paper. Unlike previous most directly-excited piezoelectric wind energy harvesters, the EPT-WGEH was characterized by an indirectly-excited shelter-structure, which isolates the embedded piezoelectric transducer (EPT) from the flow environment. Meanwhile, the horizontal swing of the hollow cylinder and the elastic pendulum beam is transformed into the vertical swing of the EPT mounted in the hollow cylinder under wind excitation. Therefore, this 2-DOF indirectly-excited EPT-WGEH could possess both high reliability and small volume. A CFD simulation model was established to analyze the influence of structural parameters on the vibration characteristics of EPT-WGEH. To verify the feasibility of the principle and design regarding the proposed EPT-WGEH, a prototype of the EPT-WGEH was fabricated and tested in terms of electrical output and operating bandwidth. The results showed that the length of elastic pendulum beam, proof mass, and wind speed brought significant effects on the electrical output, minimum working wind speed and operating bandwidth. The maximal output voltage increased with the decreasing length of elastic pendulum beam or the increasing proof mass. Meanwhile, there existed some optimal combinations of parameters to minimize the minimum working wind speed of EPT-WGEH. Besides, the optimal output power of EPT-WGEH could reach 2.4 mW at load resistance of 600 kΩ. The EPT-WGEH could light up 75 series-connection commercial blue LEDs simultaneously at the wind speed of 15 m/s and demonstrated its practical power supply capability by charging capacitors.

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通过嵌入式压电传感器设计、制造和表征风隔离奔腾能量收集器

在过去十年中，利用压电机制从风引起的振动中收集能量以实现能源自主型无线传感器系统已引起广泛关注。为了解决现有压电风能收集器可靠性低、环境适应性差和工作带宽窄等问题，本文提出了一种具有嵌入式压电传感器的风力隔离奔腾能量收集器（EPT-WGEH）。与以往大多数直接激励式压电风能收集器不同，EPT-WGEH 的特点是采用间接激励式遮蔽结构，将嵌入式压电换能器（EPT）与流动环境隔离开来。同时，在风力激励下，空心圆柱体和弹性摆梁的水平摆动转化为安装在空心圆柱体中的 EPT 的垂直摆动。因此，这种 2-DOF 间接激励式 EPT-WGEH 既具有高可靠性，又具有较小的体积。为了分析结构参数对 EPT-WGEH 振动特性的影响，建立了 CFD 仿真模型。为了验证所提出的 EPT-WGEH 原理和设计的可行性，制作了 EPT-WGEH 原型，并从电输出和工作带宽方面进行了测试。结果表明，弹性摆梁的长度、验证质量和风速对电输出、最小工作风速和工作带宽有显著影响。最大输出电压随弹性摆梁长度的减小或证明质量的增加而增加。同时，存在一些最优参数组合，可使 EPT-WGEH 的最小工作风速最小。此外，在负载电阻为 600 kΩ 时，EPT-WGEH 的最佳输出功率可达 2.4 mW。在风速为 15 m/s 时，EPT-WGEH 可同时点亮 75 颗串联商用蓝光 LED，并通过对电容器充电证明了其实际供电能力。

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

Mechatronics 工程技术-工程：电子与电气

CiteScore

5.90

自引率

9.10%

发文量

审稿时长

109 days

期刊介绍： Mechatronics is the synergistic combination of precision mechanical engineering, electronic control and systems thinking in the design of products and manufacturing processes. It relates to the design of systems, devices and products aimed at achieving an optimal balance between basic mechanical structure and its overall control. The purpose of this journal is to provide rapid publication of topical papers featuring practical developments in mechatronics. It will cover a wide range of application areas including consumer product design, instrumentation, manufacturing methods, computer integration and process and device control, and will attract a readership from across the industrial and academic research spectrum. Particular importance will be attached to aspects of innovation in mechatronics design philosophy which illustrate the benefits obtainable by an a priori integration of functionality with embedded microprocessor control. A major item will be the design of machines, devices and systems possessing a degree of computer based intelligence. The journal seeks to publish research progress in this field with an emphasis on the applied rather than the theoretical. It will also serve the dual role of bringing greater recognition to this important area of engineering.