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Safe Sweater for Robots

Safe Sweater for Robots

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By Wisse Hettinga



Sweater-Wrapped Robots Can Feel and React to Human Touch

RobotSweater, developed by a research team from Carnegie Mellon University’s Robotics Institute, is a machine-knitted textile “skin” that can sense contact and pressure.

“We can use that to make the robot smarter during its interaction with humans,” said Changliu Liu, an assistant professor of robotics in the School of Computer Science.

Just as knitters can take any kind of yarn and turn it into a sock, hat or sweater of any size or shape, the knitted RobotSweater fabric can be customized to fit uneven three-dimensional surfaces.

“Knitting machines can pattern yarn into shapes that are non-flat, that can be curved or lumpy,” said James McCann, an SCS assistant professor whose research has focused on textile fabrication in recent years. “That made us think maybe we could make sensors that fit over curved or lumpy robots.”

Once knitted, the fabric can be used to help the robot “feel” when a human touches it, particularly in an industrial setting where safety is paramount. Current solutions for detecting human-robot interaction in industry look like shields and use very rigid materials that Liu notes can’t cover the robot’s entire body because some parts need to deform.

“With RobotSweater, the robot’s whole body can be covered, so it can detect any possible collisions,” said Liu, whose research focuses on industrial applications of robotics.

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