ARTIFICIALLY INTELLIGENT OBSTACLE AVOIDING ROBOT

USING 8051

SACHIN NARANG UE-6858SHIKHAR MISRA UE-6878

Obstacle avoidance robot is capable of detecting an obstacle in its path.

It can avoid the obstacle on its own by changing its direction.

Principle: Proximity of obstacle is detected using IR sensors and path is adjusted suitably.

Its major application is in Automation of vehicles.

INTRODUCTION

Philips 89V51RD2 Microcontroller with 64kB flash memory working at 11.0592MHz.

Regulated power supply: 7-15V Power indicator LED. Dual full H bridge Motor Driver . DC Motors. ON/OFF switch for power and motor drivers. Infrared sensors.

MAJOR COMPONENTS(HARDWARE)

TRIC : windows based IDE combining editor,

project manager and compiler. iBoard compatible. includes SDCC compiler (an open source

software).

SOFTWARES USED

FLASH MAGIC : windows software from embedded

systems academy. Its features includes :Erasing ,

Programming and Modifying Flash memory.

SOFTWARES USED

P89V51RD2(Philips) Features

64 KB flash memory 1 KB RAM 32 I/O lines Three 16-bit Timer/Counter

8051 Features

Features:  Modulated IR transmitter Ambient light protected IR receiver 3 pin interface connectors Indicator LED

IR SENSORS

MOTOR DRIVER IC L293D

1.Microcontroller provides us only digital logic (1 or a 0).2. We cant provide polarity from microcontroller.3. We cant connect motors to Controller as mostly motors runs on voltage higher that +5V, and motors demands high current (depends).Now the solution to above limitations is use of a “H Bridge”.

BLOCK DIAGRAM

8051µC

PC

Memory

ML

MRMR

Clock

LS

FS

RS

Serial Interface RS 232

LS: Left SensorFS: Front SensorRS: Right SensorML: Motor LeftMR: Motor Right

Left Sensor Front Sensor

Right Sensor

Action

1 0 0 45o turn right

0 0 1 45o turn left

1 1 0 90o turn right

0 1 1 90o turn left

1 0 1 135o turn left

0 0 0 Move forward

0 1 0 45o turn left

LOGIC

Path of robot

THANK YOU!