Piezoelectric Vibration Energy Harvester Using Indirect Impact of Springless Proof Mass
Piezoelectric Vibration Energy Harvester Using Indirect Impact of Springless Proof Mass
复制标题
利用无弹簧检验质量的间接冲击的压电振动能量采集器
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
C. Ji
中科院分区：
文献类型：
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作者：
S. Ju;C. Ji
本文提出了一种基于冲击的压电振动能量采集器，采用可自由移动的球形检测质量块和MFC（宏纤维复合材料）梁作为压电悬臂梁。当施加外部振动时，一个金属球沿着通道自由运动，与腔体两端碰撞，诱发并联MFC的振动，产生电能。已经设计并测试了具有手表的形状因子的概念验证设备。此外，由不同材料制成的球形验证质量已经被测试，以分析输出功率，长期可靠性和工作过程中的可听噪声水平之间的关系。在3g、17Hz的振动下，MFC梁并联的器件获得了最大峰峰值开路电压41.2V和平均功率908.7 μW。
This paper presents an impact-based piezoelectric vibration energy harvester using freely movable spherical proof mass and MFC (Macro Fiber Composite) beams as piezoelectric cantilevers. When external vibration is applied, a metal sphere moves freely along the channel and collides with both ends of the cavity, which induces the vibration of parallel- connected MFCs and generates electric power. A proof-of-concept device having the form- factor of a wristwatch has been designed and tested. Moreover, spherical proof mass made of different materials has been tested to analyze the relationship between output power, long-term reliability, and audible noise level during operation. Maximum peak-to-peak open circuit voltage of 41.2V and average power of 908.7 μW have been obtained in response to a 3g vibration at 17Hz for device with parallel-connected MFC beams.