摘要
文中设计了三自由度机械能采集器,将人体随机运动时产生的机械能转换为电能,以便为各种便携式或穿戴式电子装置供电。该采集器由1个球状永磁体和1个外表上置有感应线圈的球状壳体组成。当人体运动时,球状永磁体在球状壳体中作无规则自由运动运动,引起壳体上线圈的磁通量变化,从而实现磁感应发电。系统研究了在不同人体运动状态下,线圈的匝数、厚度和放置位置,以及球状永磁体与球状壳体的直径比等因素对采集器发电特性的影响。实现了在正常行走状态下产生0.567 m W的发电量,可满足某些可穿戴电子式设备的用电需求。
A three-dimensional mechanical energy harvester was designed to convert mechanical energy of random body motions into electrical energy for powering portable and wearable electric equipment.This harvester was comprised of a spherical permanent magnet and a hollow ball with an induction coil on its surface.When human body motion happened ,the irregular roiling of the spherical magnet in the hollow ball caused magnetic flux variation and then induced current was generated in the coil.In this study, the effects of motion condition, number of turns, coil height and placement on energy harvesting were systemically investigated.Finally,0.567 mW electrical energy was acquired with the condition of normal walking,which resolved energy requirement of some wearable devices.
出处
《仪表技术与传感器》
CSCD
北大核心
2016年第11期46-49,共4页
Instrument Technique and Sensor
基金
教育部新世纪优秀人才支持计划(NCET-13-0871)
国家自然科学基金面上项目(61372044)
江苏省高校自然科学研究重大项目(14KJA510002)
关键词
能量采集
三自由度
随机运动
磁感应
机械能
energy harvesting
three dimensional
random motion
magnetic induction
mechanical energy
