Intelligent ultrasonic detection of walking sticks for the blind
Yiqing Liu, Zhikai Gao, Zhang-Jian Shao, Gu-Yang Liu · 2017
The intelligent devices have taken us to a convenient and fashionable era, however while we use a pedometer to calculate the number of steps, the blind even do not have the ability to walk independently. There is no doubt that they are eager for convenience and freedom, based on this, this article proposes an intelligent system that assists the blind in walking. The system consists of a crutch and a bracelet. The crutch can detect the obstacles in front with ultrasonic sensors which working direction is controlled by stepper motors and angle sensor. The bracelet would vibrate when the obstacles are detected to prompt the user. Furthermore, the Sensors on the bracelet can detect a blind man's fall, if the blind can't stand up in time, the bracelet would automatically make a voice to passers-by for help. The bracelet is equipped with GPS and 4G terminals, so position and need of the blind can be both sent to his family. By testing, the system can recognize obstacles such as pedestrians, trees, bricks and so on. The proper environment to use are also identified.