Tactile Sensing Applied to the Universal Gripper Using Conductive Thermoplastic Elastomer

Area of Science:

• Robotics
• Materials Science
• Sensor Technology

Background:

• Soft materials offer advantages in robotics but pose sensing challenges due to their deformability and infinite degrees of freedom.
• Existing sensors can inhibit soft body mechanics and have limited resolution for large, deformable structures.

Purpose of the Study:

• To develop a novel sensing approach for large, deformable soft robotic structures.
• To create a theoretical framework and design principles for optimizing sensor implementation in soft robotics.
• To enhance a robot's ability to identify and manipulate objects using sensorized soft grippers.

Main Methods:

• Utilized a conductive thermoplastic elastomer for strain sensing in soft structures.
• Developed a theoretical framework to guide sensor design and characterization.
• Experimentally validated the approach using a universal gripper case study.

Main Results:

• The conductive elastomer approach successfully captured sensory strain information without disrupting system dynamics.
• The theoretical framework provided design principles for effective sensor implementation.
• The sensorized gripper demonstrated improved object identification capabilities for enhanced manipulation.

Conclusions:

• Conductive thermoplastic elastomers offer a viable solution for sensing large, deformable soft robotic systems.
• The developed framework aids in optimizing sensor design for maximum information retrieval (location, posture, shape).
• This sensing technology can significantly improve robotic grasping and manipulation performance.