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Cars have detectors for reversing. Detectors will be sounded the alarm when obstacles are too close to the vehicle.This device uses this principle. 6 acoustic wave sensor are worn on the the blind’s hands, shoulders and feet. The detector can detect and warn the distance between the blind and the nearest obstacle. And host will remind the blind by the earphone. So this product will solve the problem that the blind man is not convenient to go for walk.
Wuhan University of Technology