Modeling, validation and design analyses of a piezoelectric cymbal transducer for non-resonant energy harvesting
Modeling, validation and design analyses of a piezoelectric cymbal transducer for non-resonant energy harvesting
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DOI：
10.1109/greencom-ithings-cpscom.2013.303
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发表时间：
2013-08
期刊：
影响因子：
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通讯作者：
A. Daniels;Alessandro Giuliano;M. Zhu;A. Tiwari
中科院分区：
文献类型：
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作者：
A. Daniels;Alessandro Giuliano;M. Zhu;A. Tiwari
压电Cymbal换能器（PCT）的特性很难单独使用等效电路法和/或动态建模。本文使用经过验证的有限元模型（FEM），该模型涵盖了用于能量收集应用的PCT设计的机械和电气方面。PCT由夹在两个金属端盖之间的压电盘组成，金属端盖具有浅腔，浅腔用作机械力放大器以增加压电盘上的力。当PCT连接到负载电阻器并由类似于人类步态（2 Hz）的频率的力激励时，特别关注PCT收集的功率的计算。结果发现，电阻负载，压电盘和端盖的尺寸有显着的影响，从PCT的功率输出。具有0.33 mm端盖厚度的尺寸为1.30 x 4.6 mm的PCT能够在2 Hz下的50 N力下收获0.07 mW的功率（具有3 MO电阻负载）。
It is difficult to characterize the Piezoelectric Cymbal Transducer (PCT) using the equivalent circuit method and/or dynamic modeling alone. This paper uses a validated Finite Element Model (FEM) that encompasses both mechanical and electrical aspects of the PCT design for energy harvesting applications. The PCT consists of a piezoelectric disk sandwiched between two metal end caps with shallow cavities that act as mechanical force amplifiers to increase the force on the piezoelectric disk. A special focus has been given to the calculation of the power harvested by the PCT when this is connected to a load resistor and excited by a force of frequencies similar to human gait (2 Hz). It was found that the electrical resistive load, the dimensions of the piezoelectric disk and of the end caps had significant effects on the power output from the PCT. A PCT of dimensions Ø30x4.6 mm with an end cap thickness of 0.33 mm was able to harvest 0.07 mW of power under a 50 N force at 2 Hz (with 3 MO resistive load).