Energy Harvesting From Heartbeat Using Piezoelectric Beams With Fan-Folded Configuration and Added Tip Mass

Q4 Environmental Science

Scopus: Journal of East African Ornithology Pub Date : 2015-09-21 DOI:10.1115/SMASIS2015-9071

M. Ansari, M. Karami

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引用次数: 8

Abstract

A fan-folded piezoelectric energy harvester is designed to generate electricity using heartbeat vibrations. This energy harvester consists of several bimorph beams stacked on top of each other making a fan-folded shape. Each beam has a brass substrate and two piezoelectric patches attached on both sides of it. These beams are connected to each other by rigid beams. One end of the device is clamped to the wall and the other end is free to vibrate. A tip mass is placed at the free end to enhance the output power of the device and reduce the natural frequency of the system.High natural frequency is one major concern about the microscaled energy harvesters. The size for this energy harvester is 1 cm by 1 cm by 1 cm, which makes the natural frequency very high. By utilizing the fan-folded geometry and adding tip mass and link mass to the configuration, this natural frequency is reduced to the desired range.The generated electricity can be used to power up a pacemaker. If enough electricity is generated, the pacemaker operates without having a battery and the patient does not need to have a surgery every seven to ten years to have the battery replaced. The power needed for a pacemaker to operate is about 1 microwatt. In this paper, the natural frequencies and mode shapes of fan-folded energy harvesters with added tip mass and link mass are analytically derived. The electro-mechanical coupling has been included in the model and the expression for the multi-mode power frequency response function is calculated.Copyright © 2015 by ASME

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利用扇形折叠结构和增加尖端质量的压电梁收集心跳能量

一种扇形折叠的压电能量收集器被设计用来利用心跳振动发电。这个能量收集器由几个双晶束堆叠在一起，形成一个扇形。每根梁都有一个黄铜基板和两个贴在其两侧的压电片。这些梁通过刚性梁相互连接。该装置的一端固定在墙上，另一端可以自由振动。在自由端放置一个尖端质量，以提高装置的输出功率，降低系统的固有频率。高固有频率是微型能量采集器的一个主要问题。这个能量收集器的尺寸是1cm × 1cm × 1cm，这使得它的固有频率非常高。通过利用扇形折叠的几何形状，并在配置中增加尖端质量和连杆质量，将固有频率降低到所需的范围。产生的电力可以用来为起搏器供电。如果产生足够的电力，心脏起搏器无需电池即可工作，患者也不需要每隔7到10年就进行一次更换电池的手术。起搏器工作所需的功率约为1微瓦。本文分析推导了增加尖端质量和连杆质量的扇形折叠能量采集器的固有频率和振型。模型中考虑了机电耦合，并计算了多模工频响应函数的表达式。ASME版权所有©2015

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来源期刊

Scopus: Journal of East African Ornithology Environmental Science-Ecology

CiteScore

0.60

自引率

0.00%

发文量

期刊介绍： Journal of East African Ornithology has been published since 1977 by the Bird Committee of the East Africa Natural History Society. Originally titled Scopus, the addition of Journal of East African Ornithology began with our January 2018 issue. The journal is published Open Access twice a year, typically in January and July. Authors retain copyright and their work is licensed under the Creative Commons Attribution 4.0 International License. Our copyright and licensing agreement only applies from January 2018 onwards, and does not apply to previously published issues. Users have the right to read, download, copy, distribute, print, search, or link to the full texts of these articles.