Ultrasonic Blind Stick With GPS Tracking
The generally available blind walking sticks are capable of finding obstacle that touch the stick physically. It is helpful to a blind person but we here propose an advanced blind stick system that allows blind person to sense objects before stick touches them. Check if there is water in front. Also it includes gps tracking feature to find lost person along with other useful features. The system uses a microcontroller based circuit to handle the entire system functioning. Our system uses ultrasonic sensor to sense objects within certain range of the person and sounds beeps of a particular type to signal obstacles. Also we use a shorting system to detect water in front of the person. As soon as the front wires of the system dip in water that system signals the blind person by a different beep pattern to signal water in front. Now this system also has a light sensing feature to give the blind person a sense of light. It signals the person if there is light or darkness so that he/she can know if it is night or has entered a very dark room/facility. If the person looses the stick the person can use an rf remote so the stick starts beeping and the person can find it. One more important feature of the system is that the system allows the blind person to send out a sms message with his/her gps location to the caretaker/relatives/loved ones of the person in case of trouble or being lost.