Experimental Testbed for Ultrasonic Wireless Power Transfer and Backscattering Based Localization for Future Implantable Devices
Experimental Testbed for Ultrasonic Wireless Power Transfer and Backscattering Based Localization for Future Implantable Devices
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DOI：
10.1109/iscas45731.2020.9180911
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
C. Kummer;J. Summers;Quinton Lum;Carl Sundsten;Chung-Ching Lin;Subhanshu Gupta;S. Seslar;W. Monsky
中科院分区：
文献类型：
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作者：
C. Kummer;J. Summers;Quinton Lum;Carl Sundsten;Chung-Ching Lin;Subhanshu Gupta;S. Seslar;W. Monsky
开发一种自主跟踪系统，可以准确定位并以具有成本效益的方式将更大量的功率无线传输到深层组织导管植入物，这将被证明在医学上非常有用。这项工作提出了一种基于后向散射的能量传输和跟踪系统，用于未来的深部组织植入物。为了传输功率，将顶部开放的超声换能器放置在皮肤附近，超声波可以为患者体内导管尖端上的电路供电。对于跟踪系统，换能器使用超声反向散射和到达时间来精确定位导管的尖端。为了表明这一概念将在未来的应用中发挥作用，该系统的两个主要组成部分进行了测试和验证，使用商用现成的设备与空气作为介质。我们能够显示单向0.34mm的定位分辨率，并以x轴上6.32mm的精度和y轴上4.27mm的精度在两个维度上跟踪对象。超声波无线功率传输（WPT）通过称为k-Wave的开源MATLAB工具箱使用线性矩形阵列近似进行建模。开发的阵列模型进行了实验验证，在距离从11毫米到310毫米，使用线性矩形阵列近似的商业可用的传感器通过空气的传输效率高达81.9%。
The development of an autonomous tracking system which could accurately locate and transfer higher quantities of power wirelessly to deep-tissue catheter implants in a cost-effective manner would prove very useful in medicine. This work presents a backscatter-based energy transfer and tracking system for future deep-tissue implants. To transfer power, an open-top ultrasonic transducer would be placed near the skin, the ultrasonic wave can power circuits on the tip of the catheter inside the patient. For the tracking system, transducers use ultrasonic backscattering and time-of-arrival to precisely locate the tip of the catheter. To show this concept will work in future applications, the two major components of the system were tested and validated using commercial off-the-shelf devices with air as medium. We were able to show a one-way 0.34mm localization resolution and track an object in two dimensions with 6.32mm accuracy on the x-axis and 4.27mm on the y-axis. Ultrasonic Wireless Power Transfer (WPT) was modeled using a linear rectangular array approximation via an open-source MATLAB Toolbox known as k-Wave. The developed array model was experimentally validated at distances from 11mm to 310mm using a linear rectangular array approximation of commercially available transducers for transfer efficiencies through air of up to 81.9 percent.