| 张 坤,武科迪,苏宇锋.基于分段线性系统的宽频振动能量收集器[J].电子测量与仪器学报,2020,34(9):140-145 |
| 基于分段线性系统的宽频振动能量收集器 |
| Wideband vibration harvester based on piecewise linear system |
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| DOI： |
| 中文关键词: 分段线性系统 振动能量收集器 宽频 电磁感应 |
| 英文关键词:piecewise linear system vibration energy harvester wideband electromagnetic induction |
| 基金项目:分段线性系统;振动能量收集器;宽频;电磁感应 |
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| 中文摘要: |
| 研究了一种基于分段线性系统的宽频振动能量收集器,主要由抗磁稳定悬浮结构、弹性膜及感应线圈组成。 在静止状
态下,悬浮磁铁不需要任何外界能量稳定地悬浮在热解石墨板之间。 当振动能量采集器受到水平振动激励时,悬浮磁铁在两热
解石墨板之间摆动;当摆动幅度比较大时,悬浮磁铁将与弹性膜发生碰撞使系统刚度呈阶段性变化;随着悬浮磁铁运动,感应线
圈中的磁通量发生变化产生感应电动势,从而使外界振动能转化为电能。 当水平激励振幅为 5 mm 时,系统的工作带宽达到
3. 2 Hz,最大输出电压达到 78 mV,最大输出功率为 56. 3 μW;当水平振动激励的加速度为 3 m/ s
2 时,系统的工作带宽达到
2 Hz,最大输出电压为 44 mV,最大输出功率为 18 μW。 |
| 英文摘要: |
| A wideband vibration harvester based on piecewise linear system is proposed, which is mainly composed of the structure of
diamagnetically stabilized levitation, induced coils and elastic films. The floating magnet is freely levitated between two pyrolytic graphite
sheets without any external energy input. When a horizontal vibration excitation was applied to the vibration energy harvester, the floating
magnet would oscillate between two pyrolysis graphite sheets, the floating magnet impacted to the elastic film with the increase of
vibration intensity, which would cause the system stiffness to be segmented, the magnetic flux through the induced coils would change
during the movement of the floating magnet, and the external vibration was converted into electrical energy. When the horizontal
excitation amplitude is 5 mm, the operating bandwidth of the system reaches 3. 2 Hz, the maximum output voltage reaches 78 mV, and
the maximum output power is 56. 3 μW. Under an excitation acceleration of 3 m/ s
2
, a maximum output voltage of 44 mV with the
maximum power of 18 μW is obtained by the harvester, and the operating bandwidth of the system reaches 2 Hz. |
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