SENSOR STICK

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.

Video