声能量传递系统的机理与优化

Ariba Siddiqui, Amber Khan
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引用次数: 2

摘要

对生物植入设备的需求日益增加,然而这些设备的充电是一个主要问题。因此,最近开发了无线电力传输技术,以无线方式为这些植入物供电,并消除了对电池充电的需要。本文首先比较了各种功率传输技术,即感应功率传输、射频功率传输和声学功率传输。由于声功率传输方法优于感应功率传输和射频功率传输,因此本文主要关注声功率传输方法。讨论了声功率传输技术的原理和设计挑战。计算了不同频率下的声压。基于频率对换能器尺寸、组织衰减和瑞利距离等因素的影响;选择一个最佳频率来压缩装置的尺寸和增大压力波的振幅。在MATLAB和COMSOL软件中进行了仿真。选用PZT-5H换能器,质量因数高,机电耦合高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mechanism and Optimization of Acoustic Power Transfer Systems
The need for bio-implantable devices is increasing day by day, however the charging of these devices is a major issue. As a result, wireless techniques of power transfer are developed recently to power these implants wirelessly and to eliminate the need of charging the batteries. In this paper, various techniques of power transfer viz., inductive-power transfer, RF power-transfer and acoustic power-transfer are compared first. The main focus in this paper is done on the acoustic power transfer methodology due to its advantages over inductive and RF power transfer. The mechanism and design challenges of the acoustic power transfer techniques are discussed. The acoustic pressure is calculated at different frequencies. Based on the various factors like transducer size, tissue-attenuation and Rayleigh-distance which are affected by the frequency; a best optimum frequency is chosen to compress the size of the device and augment the amplitude of the pressure wave. The simulations were done in MATLAB and COMSOL softwares. PZT-5H transducer is selected due to its high quality factor and high electromechanical coupling.
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