可调谐谐振频率振动能量采集器与驻极体嵌入可变电容器

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IET Nanodielectrics Pub Date : 2021-03-10 DOI:10.1049/nde2.12007
Xingchen Ma, Xiaoya Yang, Heinz von Seggern, Ying Dai, Pengfei He, Gerhard M. Sessler, Xiaoqing Zhang
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引用次数: 7

摘要

设计了一种谐振频率可调、体积小、重量轻、输出功率大的驻极体静电能量采集器,并对其性能进行了有限元预测和实验验证。该装置由一个弹性的氟化聚乙烯丙烯(FEP)驻极体膜组成,该膜的一侧被金属化,中心附着一个小的地震质量,以及一个弧形的对电极。原理上,该能量采集器机械上为质量弹簧系统,电气上为自偏压可变电容,通过机电耦合将振动能转换为电能。对于尺寸为30 × 10 × 9 mm的能量收集器样品,其最后一个尺寸表示收集器中心的初始深度,通过拉伸加载给定地震质量0.06 g的FEP膜的长度,可以将共振频率从17 Hz调谐到70 Hz。当地震质量为0.1 g时,采集器以17 Hz的谐振频率向匹配电阻产生797 μW的功率,加速度为1×g (g为地球重力)。这种能量收集器有望用于自供电电子设备和无线传感器网络节点。
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Tuneable resonance frequency vibrational energy harvester with electret-embedded variable capacitor

An electret-based electrostatic energy harvester featuring tuneable resonance frequency, small size, light weight, and high output power was designed and its performance predicted by the finite element method and verified by experiment. The device consists of a resilient fluorinated polyethylene propylene (FEP) electret film that is metallised on one side with a small seismic mass attached to its centre and an arc-shaped counter electrode. In principle, such an energy harvester is mechanically a mass-spring system and electrically a self-bias voltage variable capacitor and converts vibrational energy into electrical energy by electromechanical coupling. For an energy harvester sample with dimensions of 30 × 10 × 9 mm for which the last dimension denotes the initial depth of the centre of the harvester, the resonance frequency can be tuned from 17 to 70 Hz by stretching the length of the FEP film loaded with a given seismic mass of 0.06 g. For a seismic mass of 0.1 g, the harvester generated a power up to 797 μW to a matching resistor at its resonance frequency of 17 Hz at an acceleration of 1×g, where g is the gravity of the earth. Such energy harvesters are promising candidates for use in self-powered electronic devices and wireless sensor network nodes.

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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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