对于肥胖患者的微型接收器的最佳频率和无线电源预算
Tom Van de Steene1, Emmeric Tanghe1, Luc Martens1
1Department of Information Technology, Ghent University/imec, B-9052 Ghent, Belgium.
Sensors (Basel, Switzerland)
|October 14, 2023
概括
这项研究优化了深层体内接收器的无线功率传输,在20厘米深处达到18微瓦. 13.56 MHz的频率使所有身体类型的胃肠道长期监测成为可能.
科学领域:
- 生物医学工程 生物医学工程
- 无线电力传输无线电力传输
- 可植入的设备可以植入设备.
背景情况:
- 深入体内无线电力传输 (WPT) 对于长期胃肠道监测至关重要.
- 由于组织深度更大,肥胖患者对WPT提出了独特的挑战.
- 当前的WPT系统经常在很深的水深处与效率和功率交付扎.
研究的目的:
- 为了确定最优的频率,功率预算,以及深入体内WPT系统的设计.
- 为了实现可靠的电力传输到小的,毫米大小的接收器,在机身内深达20厘米.
- 为了便于长期监测和感知胃肠道的各种类型的身体.
主要方法:
- 使用数值模拟来分析各种频率 (1kHz-10GHz) 的功率传输和损失.
- 一个肥胖的身体模型被用来优化发射器和接收器线圈设计在所选的频率.
- 进行了实验验证,以确认模拟结果和功率传输效率.
主要成果:
- 深入体内WPT的最佳频率被确定为13.56MHz,平衡铜和组织损失.
- 设计了一个带有12个绕的发射线圈和一个带有23个绕的接收线圈.
- 2.70×10-5W/W的效率导致18μW从0.68W输入接收功率,符合安全准则.
结论:
- 13.56 MHz的WPT非常适合深 (20厘米) 的体内应用,性能优于更高的频率.
- 拟议的系统提供了优势,如没有聚焦要求,可以容纳多个接收器和位置不确定性.
- 达到的接收功率支持胃肠道的长期感知和刺激.
相关概念视频
01:16Maximum Power Transfer
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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
By substituting the entire circuit with...
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01:15Receiver Operating Characteristic Plot
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A ROC (Receiver Operating Characteristic) plot is a graphical tool used to assess the performance of a binary classification model by illustrating the trade-off between sensitivity (true positive rate) and specificity (false positive rate). By plotting sensitivity against 1 - specificity across various threshold settings, the ROC curve shows how well the model distinguishes between classes, with a curve closer to the top-left corner indicating a more accurate model. The area under the ROC curve...
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01:24Characteristics of Series Resonant Circuit
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Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
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01:20The Maximum Power Transfer Theorem
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Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.
639