A Flexible Annular Sectorial Sensor for Detecting Contact Position Based on Constant Electric Field

Area of Science:

• Robotics
• Sensor Technology
• Materials Science

Background:

• Robots require tactile sensing for safe interaction with their environment.
• Irregular surfaces, like robot links, pose challenges for traditional sensors.
• Collision detection is crucial for preventing damage during robot operation.

Purpose of the Study:

• To develop a flexible sensor for tactile detection on irregular robot link surfaces.
• To enable accurate contact position identification for collision avoidance.
• To create a sensor adaptable to truncated cone-shaped robot components.

Main Methods:

• Proposed a five-layer flexible annular sectorial sensor design.
• Utilized a constant electric field between conductive layers to determine contact coordinates.
• Established a mathematical model correlating electric potential with contact position.
• Simulated sensor performance using COMSOL software and conducted experimental validation.

Main Results:

• Simulations and experiments confirmed the sensor's effective performance on a robot link.
• The sensor accurately detected contact positions on the irregular, wrapped surface.
• The mathematical model accurately predicted the relationship between electric potential and contact location.

Conclusions:

• The proposed flexible sensor is suitable for tactile detection on irregular robot surfaces.
• The sensor design and mathematical model provide a viable solution for robot collision detection.
• Experimental validation confirms the practical applicability of the sensor in robotic systems.