Introduction
This device
is mainly designed for the visually impaired people to navigate the surroundings.
It is capable
of detecting and alerting the user with a ‘beep… beep’ noise if there are any
objects ahead, thus helping the visually impaired people to track their path
carefully without getting collided with any obstacles.
It is mainly
made using the parts specified below, where the ultrasonic
sensor senses the path ahead for any objects and then passes the information’s
to the micro controller, which
sends a pulse to the buzzer if required, thus alerting the user.
Parts
required
- Micro controller-Arduino Uno
- Ultrasonic sensor
- Buzzer
- Caster wheel
- Connecting wires
- Batteries
Description of the robot
The ultrasonic sensor
emits ultrasonic rays. These rays are reflected and received by the sensor if there
are any objects in front. The time difference between the emitted and the
reflected pulse is sent to the micro controller, which uses this information to
calculate the distance between the device & the object.
The micro controller has
the program code. It receives continuous information from the sensor and
compares these data with the preset values. If there are any objects 30cm ahead
the user, a pulse is sent to the buzzer, which activates on.
The caster
wheel allows the user to smoothly navigate and also helps them feel the ground.
Improvements to be done
- Fixing a vibrator as a measure of extra security(incase the user did not hear the noise of the buzzer he can feel the vibrations).
- Fix a system of lights on the device that will switch on, when the surrounding becomes dark. This will alert others to notify the user, when he has entered a dark surrounding.
