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This crutch has been designed for people with limited sight. It uses sensors to detect the road condition, and then converts this information into esay braille symbols. In this way, the blind can easily decide which direction to choose and whether it is a proper time to go, especially in a noisy street when an audible blind crutches doesn't act.
Besides, it has a roll and a colour sensr on the bottom, so that the blind can push it along a coloured blind sidewalks (simply a coloured line), which makes them even safer。
Sheng Chen Fan Zhang Linkai Tao Huabiao Shan