Automatic Path Tracking and Target Manipulation of a Magnetic Microrobot

Area of Science:

• Biomedical Engineering
• Robotics
• Microtechnology

Background:

• Wireless-controlled microrobots show significant potential in biomedicine.
• Electromagnetic microrobots offer agility and precision but often rely on manual control.
• Automated control methods promise enhanced accuracy and stability for microrobot operations.

Purpose of the Study:

• To develop and evaluate an electromagnetic manipulation system for automated microrobot control.
• To enable precise locomotion along various paths and manipulation of micro-objects.
• To improve upon manual control methods for microrobots in biomedical applications.

Main Methods:

• An electromagnetic manipulation system was designed for automated microrobot control.
• Visual feedback and an expert control algorithm were employed for path tracking.
• Positioning accuracy and velocity were quantified, and micromanipulation tasks were performed.

Main Results:

• The system achieved a positioning accuracy with errors ranging from 92 to 293 μm, below the microrobot's body size.
• Microrobot velocity was found to be proportional to applied current, reaching up to 5 mm/s.
• Automated manipulation of microspheres and microgears demonstrated high precision in dragging, placing, and driving.

Conclusions:

• The proposed system enables precise, automated locomotion and manipulation of microrobots.
• This technology holds promise for delicate micro-operations in challenging environments like blood vessels and microfluidics.
• The automated electromagnetic microrobot represents a significant advancement for micro-scale biomedical interventions.