the SCRATCHbot uses whiskers instead of cameras to see in the dark
bristol hope to deploy the poodle-size 'bot in search-and-rescue missions where vision is impaired. its 18 whiskers move back&forth five times persecond. when a whisker bends, a sensor on its shaft signals software to orient the 'bot toward the object. whiskers clous to an object move less, while those farther away make wide, sweeping motions to establish the object's exact adges
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