Engineers have come up with an artificial fingertip that gives robots nearly humanlike touch.
Robots can be programmed to lift a car and even help perform some surgeries, but when it comes to picking up an object they have not touched before, such as an egg, they often fail miserably. Now, engineers have come up with an artificial fingertip that overcomes that limitation. The advance enables machines to sense the textures of these surfaces a lot like a human fingertip does.
So, when researchers at the University of Bristol began designing an artificial fingertip in 2009, they used human skin as a guide. Their first fingertip—assembled by hand—was about the size of a soda can. By 2018, they had switched to 3D printing. That made it possible to make the tip and all its components about the size of an adult’s big toe and more easily create a series of layers approximating the multilayered structure of human skin.
“A lot of our sense of touch is shaped by the mechanics [of the skin],” says Sliman Bensmaia, a neuroscientist at the University of Chicago who studies the neuronal basis of touch. “What this approach does is really tackle that head on.” The studies impress Levent Beker, a mechanical engineer at Koç University who works on wearable sensors. “A robotic hand can [now] sense pressure and texture information similar to a human finger,” he says.
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