Most robots achieve grasping and tactile sensing through motorized means, which can be excessively bulky and rigid. Scientists have now devised a way for a soft robot to feel its surroundings internally, in much the same way humans do. Stretchable optical waveguides act as curvature, elongation and force sensors in a soft robotic hand.
https://www.sciencedaily.com/releases/2016/12/161212134605.htm
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