A portable wireless power transmission system for video capsule endoscopes

Area of Science:

• Biomedical Engineering
• Medical Devices
• Wireless Power Transfer

Background:

• Button batteries limit the clinical application of video capsule endoscopes (VCEs) due to energy constraints.
• Existing wireless power transmission (WPT) systems for VCEs often rely on fixed platforms, restricting their portability and widespread use.

Purpose of the Study:

• To develop and evaluate a portable wireless power transmission (WPT) system for video capsule endoscopes (VCEs).
• To optimize the WPT system for power transfer efficiency, stability, and portability for enhanced clinical application.

Main Methods:

• The portable WPT system design focused on the transmitting coil structure, portable control box, operating frequency, and magnetic core and winding of the receiving coil.
• Correlation parameters were measured, compared, and chosen based on optimization principles.
• System feasibility was tested and evaluated through experiments in a small pig's gastrointestinal tract.

Main Results:

• The portable WPT system successfully supplied sufficient energy to the VCE in vivo.
• The energy conversion efficiency of the system was measured at 2.8%.
• Clear video data was acquired with a resolution of 320x240 pixels and a frame rate of 30 frames per second.

Conclusions:

• The developed portable WPT system is feasible for powering VCEs, overcoming previous limitations.
• The system demonstrates potential for improved clinical application of VCEs by providing stable and portable power.
• Further improvements to the WPT system are discussed for future development.