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Achieving high electric outputs from low-frequency motions through a double-string-spun rotor

机译：通过双弦纺转子从低频运动实现高电输出

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摘要

The pervasive low-frequency mechanical energy is important for realizing self-powered electronics, but its efficient exploitation is still a highly challenging task due to the mismatch between the motion frequencies and the working frequencies of already reported energy harvesters. To tackle this issue, we propose in this paper a new motion-conversion mechanism (which we name 'double-string-spun rotor') to transform low-frequency motions (mechanical vibrations and irregular human body motions) to unidirectional and high-speed rotation. Consisting of a rotatable shaft and a ratchet, the rotor structure first converts low-frequency motions to bi-directional rotation of the shaft through two strings and then drives the ratchet to do uni-directional rotation via curved plectra. The promising application of the rotor in capturing low-frequency mechanical energy is examined through an electromagnetic generator (harvester) constructed with the rotor, which generates 46 mW power when actuated by a crank-slider mechanism at 7 Hz. The generator has also been utilized to scavenge irregular human body motions and low-frequency vibrations engendered by daily jogging, and the collected energy allows the continuous work of various commercial electronics. This study provides a new strategy for efficiently exploiting ambient low-frequency motions and exhibits the high probability of realizing self-sustained electronics with the captured low-frequency mechanical energy.
机译：普遍的低频机械能对于实现自动电子产品很重要，但由于在已经报告的能量收割机的运动频率与工作频率之间不匹配，其有效的开发仍然是一个高度挑战的任务。为了解决这个问题，我们提出了一种新的动作转换机制（我们命名为“双弦纺转子”），以将低频运动（机械振动和不规则人体运动）转换为单向和高速回转。由可旋转轴和棘轮组成，转子结构首先将低频运动转换为轴通过两个弦的双向旋转，然后驱动棘轮以通过弯曲的拨块进行单向旋转。通过用与转子构造的电磁发生器（Harvester）检查在捕获低频机械能中，转子在捕获低频机械能中的承诺施加，该电磁发生器（Harvester）在由7Hz的曲柄滑块机构致动时产生46 MW功率。发电机也被用来清除不规则的人体运动和通过每日慢跑发出的低频振动，并且收集的能量允许各种商业电子的连续工作。该研究提供了一种用于有效利用环境低频运动的新策略，并且具有利用捕获的低频机械能实现自我持续电子设备的高可能性。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第6期|107648.1-107648.18|共18页
  • 作者

    Kangqi Fan; Pengwei Xia; Yiwei Zhang; Hengheng Qu; Geng Liang; Fei Wang; Lei Zuo;

  • 作者单位

    School of Mechano-Electronic Engineering Xidian University Xi'an 710071 China;

    School of Mechano-Electronic Engineering Xidian University Xi'an 710071 China;

    School of Mechano-Electronic Engineering Xidian University Xi'an 710071 China;

    School of Mechano-Electronic Engineering Xidian University Xi'an 710071 China;

    School of Mechano-Electronic Engineering Xidian University Xi'an 710071 China;

    School of Microelectronics Southern University of Science and Technology Shenzhen 518055 China;

    Department of Mechanical Engineering Virginia Tech Blacksburg VA 24061 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Low frequency; Generator; Mechanical vibration; Human motion;

    机译：低频;发电机;机械振动;人类运动;

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