Aspect Ratio-Dependent Dynamics of Piezoelectric Transducers in Wireless Acoustic Power Transfer
Aspect Ratio-Dependent Dynamics of Piezoelectric Transducers in Wireless Acoustic Power Transfer
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DOI：
10.1109/tuffc.2019.2962711
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
A. Allam;K. Sabra;A. Erturk
中科院分区：
文献类型：
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作者：
A. Allam;K. Sabra;A. Erturk
用于无线电子部件的声功率传输（APT）作为向远程定位的小型电子设备递送功率的可行方法已经受到越来越多的关注。高效的APT系统的设计需要精确的模型来描述其各个组件以及它们之间的相互作用。大多数分析模型可用于表示APT中使用的体压电换能器限于细杆或薄板换能器。然而，通常使用具有中等纵横比的换能器，特别是在接收器端。在这项工作中，除了审查标准的理论，模型的基础上瑞利和毕晓普棒理论的开发，以分析传感器[发射器（TX）或接收器（RX）]与各种纵横比。从这些模型的结果与实验数据和有限元分析进行比较，以确定它们是有效的长宽比的范围。此外，流体负载对所有模型的预测的影响进行了调查，并产生的压力场的传感器与不同的纵横比进行了比较。所得到的模型用于分析纵横比对换能器在APT设置中作为TX或RX操作时的性能的影响。
Acoustic power transfer (APT) for wireless electronic components has received growing attention as a viable approach to deliver power to remotely located small electronic devices. The design of an efficient APT system requires accurate models to describe its individual components as well as the interaction between them. Most of the analytical models available to represent the bulk piezoelectric transducers used in APT are limited to either thin rod or thin plate transducers. However, transducers with moderate aspect ratios are often used, especially at the receiver end. In this work, in addition to reviewing standard theories, models based on the Rayleigh and Bishop rod theories are developed to analyze transducers [transmitter (TX) or receiver (RX)] with various aspect ratios. Results from these models are compared with experimental data and finite-element analysis to determine the range of aspect ratios in which they are valid. In addition, fluid loading effects on the predictions of all models are investigated, and the generated pressure fields by the transducers with different aspect ratios are compared. The resulting models are used to analyze the effect of aspect ratio on the performance of the transducer when operated as a TX or an RX in an APT setting.