Theinabilityofblindpeopletoseealsocausesdifficultieswhenmovingon the road, so it is easy to collide with objects. Walking sticks are the most frequently used mobility aids for blind people to move independently and safely. This study introduces a walking stick for the blind with smart, simple, affordable, and friendly criteria. We have deployed it to improve the mobility of both blind and visually impaired people. The main component of this system is an ultrasonic sensor that scans obstacles through reflected waves. The reflected signals from the barrier objects are input to the microcontroller. The microcontroller is then used to determine the direction and distance of objects around the blind. After that, it can notify people how many meters ahead the obstacle is in front by voice, accompanied by vibration. In addition, the system integrates a subscriber identity module card (SIM800L), GPS, and MPU 6050 acceleration sensor. When a blind is in danger, he or she can press the emergency call button. In addition, if he or she falls after 5 s without self-control, the 800L sim can receive a phone call about a pre-installed relative with a message that their GPS location is in danger in the form of a Google map link. At the same time, it warns of danger when the blind move into an area with high gas concentration or large fire around.
Tạp chí khoa học Trường Đại học Cần Thơ
Lầu 4, Nhà Điều Hành, Khu II, đường 3/2, P. Xuân Khánh, Q. Ninh Kiều, TP. Cần Thơ
Điện thoại: (0292) 3 872 157; Email: tapchidhct@ctu.edu.vn
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