Three-dimensional power receiver for in vivo robotic capsules

Area of Science:

• Robotics
• Biomedical Engineering
• Wireless Power Transfer

Background:

• In vivo robotic capsules require efficient and reliable power sources.
• Existing wireless power solutions face challenges with orientation and in vivo environments.

Purpose of the Study:

• To develop a three-dimensional wireless power receiver for in vivo robotic capsules.
• To achieve high power delivery (hundreds of milliwatts) independent of orientation.
• To validate the receiver's performance in an in vivo setting.

Main Methods:

• Design and optimization of a 3D antenna structure and rectification topology.
• Experimentation with various design parameters and rotational positions.
• Assembly of a test capsule with an LED load for in vivo testing.

Main Results:

• The wireless power receiver consistently delivers over 300 mW.
• Power reception remains effective regardless of the receiver's orientation relative to the transmitter's magnetic field.
• In vivo experiments demonstrated no degradation in power-receiving performance within the animal body.

Conclusions:

• The developed 3D wireless power receiver is suitable for in vivo robotic capsule applications.
• Orientation-independent power transfer is achieved, enhancing robotic capsule functionality.
• The system shows promise for powering miniature medical devices inside the body.