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Efficient Distributed Wireless Power Transfer System for Multiple Wearable Sensors through Textile Coil Array.

Zuolin Li1, Junhyuck Lee1, Jaemyung Lim1

  • 1School of Electronic Engineering, Hanyang University, Seoul 04763, Republic of Korea.

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|March 11, 2023
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Summary
This summary is machine-generated.

This study introduces a novel wireless power supply system using clothing for long-term physiological signal monitoring. The optimized parallel circuit significantly boosts power transfer efficiency for multiple sensors.

Keywords:
WPTparallel resonant circuittextile coilwearable device

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Area of Science:

  • Wearable technology
  • Biomedical engineering
  • Electrical engineering

Background:

  • Physiological signal detection often requires reliable, long-term power sources.
  • Existing wireless power systems face limitations in efficiency and scalability for multiple sensors.

Purpose of the Study:

  • To develop a wireless power supply system using embroidered clothing for physiological monitoring.
  • To enhance power transfer efficiency for multiple sensors compared to existing methods.

Main Methods:

  • Integration of near-field effect patterns into clothing to create a power supply medium.
  • Implementation of an optimized parallel circuit for power transmission.
  • Testing the system with varying numbers of coupled textile coils (sensors).

Main Results:

  • Achieved over five times higher power transfer efficiency compared to series circuits.
  • Simultaneous powering of eight sensors reached 25.1% efficiency.
  • Single sensor operation achieved 13.21% efficiency, demonstrating robust performance across different loads.
  • System validated for sensor counts ranging from 2 to 12.

Conclusions:

  • The proposed textile-based wireless power system offers a viable solution for long-term physiological monitoring.
  • The optimized parallel circuit design significantly improves energy transfer efficiency and scalability for wearable sensor networks.