An ultralight, tiny, flexible six-axis force/torque sensor enables dexterous fingertip manipulations

Area of Science:

• Robotics
• Materials Science
• Sensor Technology

Background:

• Dexterous manipulation requires omnidirectional force/torque sensing, crucial for both humans and robots.
• Existing six-axis force/torque sensors are often bulky, rigid, expensive, and complex.
• Current flexible force sensors lack sufficient perceptive dimensions and performance for practical use.

Purpose of the Study:

• To introduce a novel, ultralight, tiny, and flexible six-axis force/torque sensor.
• To achieve simple structure and low-cost fabrication for advanced sensing applications.
• To demonstrate the sensor's capability in real-world manipulation tasks.

Main Methods:

• Utilizing an elastic piezo-thermic material to capture the spatial strain field.
• Employing web-like scattered thin-film thermoreceptors for sensing.
• Integrating the sensor onto a robotic or human fingertip.

Main Results:

• The sensor is ultralight (0.30 g) and fingertip-sized, offering a flexible six-axis force/torque perception.
• Accurate detection of six-dimensional force/torque is achieved through spatial strain field analysis.
• Successful demonstration of dexterous object manipulation, gaming, and human-robot collaboration.

Conclusions:

• The proposed sensor offers a simple, low-cost solution for high-performance six-axis force/torque sensing.
• Its lightweight and flexible nature enables seamless integration for enhanced robotic and human capabilities.
• Potential applications include assistive technologies for the elderly and disabled, intelligent robotics, and virtual reality systems.