OBSTACLE AVOIDING ROBOT

ABHISHEK ANAND ADITYA KUMAR ADITYA ROSHAN ADARSH M.A.

ABSTRACTAn obstacle avoiding robot can sense obstacle and

dodge it.The ultrasonic sensors works as eyes for the robot

detecting the obstacles.The microcontroller takes data from sensor and

provides a route to avoid the obstacle.The robot moves with help of two motors, which

drives the two wheels,a wheel is provided which is free to move in every direction to provide the needed maneuverability.

BLOCK DIAGRAM

SENSOR MICROCONTROLLER H-BRIDGE WHEELS

COMPONENTS REQUIRED

NAME QUANTITY APPROX. PRICE/ITEMARDUINO UNO 1 ₹ 500-600

CHASSIS WITH 2 WHEELS 1 ₹ 250

SENSOR(HC-SR04) 1 ₹ 80-160

GEAR MOTORS 2-REGULAR ₹ 200

MOTOR DRIVER(L239D) 1 ₹ 150

MISCELLANEOUS - ₹ 200

ARDUINO UNO

HC-SR04

SERVO MOTORS

CIRCUIT DIAGRAM

WORKINGSensor : HC-SR04 is an ultrasonic sensor which

can detect distance of the object using sonar technology

It’s a high accuracy sensor with range from 2cm-400cm, measuring angle of 30deg

Its not affected by sunlight and can also detect black objects unlike the optical sensors.

It continuously transmits ultrasonic sound waves which is reflected back by the obstacles

It is received by the sensor which in turn calculates the distance and sends to the microcontroller to take the necessary decision.

MICROCONTROLLER: Arduino uno is used which is based on the ATmega328P µC.

Its work is to take data from the sensor and make decision according to the routing algorithm and give to the motor driver(L239D).

FLOW CHART

APPLICATION AN FUTURE SCOPE

Obstacle detection in mining vehicles.Automation system for cars.Autonomous cleaning robot.Lawn cleaning robot.In military as surveillance robot.