Researchers at Arizona State University have developed a technology that aims to reduce the cognitive burden on the prosthetic user by strengthening the ability of an artificial hand to perform automated behaviors reliably by detecting, processing, and utilizing rich, real-time information about finger-object interactions with an innovative multimodal tactile sensor skin. This is accomplished by the design of a new multi-modal tactile sensor. The tactile sensor developed is a flexible and stretchable sensor built on a polymeric organosilicon substrate called polydimethylsiloxane (PDMS). The PDMS provides a robust and durable substrate that is also flexible enough to conform to the curvature of finger tips. Instead of metal wires that are brittle and fatigue quickly, a metal conductive fluid called Galinstan is used. This conductive fluid allows the sensor to bend, twist, and stretch while maintaining connections and sensory properties. This invention will provide prosthetics and robotic application with the ability to sense more than just normal force, this sensor provides a multimodal solution to sense normal force, shear force, vibration, and slip detection.
- Space and Other Hazardous Environments
- Human-Robotic Interactions
Benefits and Advantages
- Robustness - durable construction
- Flexibility - greater sensor flexibility, no wire connection involving epoxy, no need for complicated evaporation processes, and less prone to fatigue.
- Multimodal - allows measurement of shear and normal forces, as well as local vibration and skin stretch
- Realism - a more ?realistic? tactile sensor e.g. for prostheses, human-robot interactions