Obstacle detector robot

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A Presentation On MICROCONTROLLER BASED OBSTACLE DETECTOR ROBOT Guide: Prof. SAJID NAEEM Department of Electronic Science AKI’s Poona College of Arts, Science & Commerce Camp, Pune- 411001 Completed By Yusuf Inamdar Irfan Ahmad M.Sc-II (Electronics)

Transcript of Obstacle detector robot

Page 1: Obstacle detector robot

A Presentation On

MICROCONTROLLER BASED OBSTACLE DETECTOR ROBOT

Guide:

Prof. SAJID NAEEM

Department of Electronic Science

AKI’s Poona College of Arts, Science & Commerce

Camp, Pune- 411001

Completed By

Yusuf Inamdar

Irfan Ahmad

M.Sc-II (Electronics)

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An Overview of Presentation Introduction Design & Development of Obstacle

detector Robot Study of Obstacle sensors Working of microcontroller & Motors Advantages, Disadvantages & Applications Acknowledgement & References

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INTRODUCTIONRobot is a computer-controlled machine that is

programmed to move manipulate objects, and accomplish work while interacting with appropriate sensors and actuators mounted on it for carrying out the desired operations.

In this robots Infra red pairs are used for sensing the obstacles and IR leads are used for transmitting and receiving infra red rays. Using infrared rays robots will find out the obstacles present in front of them and move right or left from their current position and move forward.

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 Obstacle detection robots are nothing but self thinking robots which can take decisions itself using programmed brain without any guidance from human beings. 

There are two types of robots in one type robots perform action as we give signals remotely where as second type of robots are self thinking robots which can detect obstacle and move forward. This project is of second robots.

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Design and Development of

Obstacle Detector Robot

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Graphical Block diagram: Obstacle Detector Robot

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Block diagram: Obstacle Detector Robot

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Interfacing circuit of Robot

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Interfacing circuit of Robot

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OBSTACLE SENSORS

The obstacle senor is used to avoid the robot from the clash to any external devices (or) that is like walls, any obstacle which comes in its way. Here we are using the IR communications .the transmitter and the receiver parts. The transmitter produces the IR rays and they are received by the receiver section.

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Architecture of 8051 Microcontroller

Features RAM 128bytes ROM 4K I/O 4 ports Timer 2 Interrupt 6

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Pin diagram of IC AT89C51

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Atmel

Dallas Semiconductor

Intel

Microchip

National Semiconductor

Texas Instruments

MANUFACTURE S OF MICROCONTROLLER

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The name "H-Bridge" is derived from the actual shape of the switching circuit which controls the motion of the motor. It is also known as "Full Bridge". Basically there are four switching elements in the H-Bridge as shown in the figure below.

H-BRIDGE MOTOR DRIVER

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Truth Table

High Left High Right Low Left Low Right Description

On Off Off On Motor runs clockwise

Off On On Off Motor runs anti-clockwise

On On Off Off Motor stops or decelerates

Off Off On On Motor stops or decelerates

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Direction P0.0 P0.1 P0.2 P0.3

Forward 1 0 1 0

Backward 0 1 0 1

Right 1 0 0 1

Left 0 1 1 0

Logic Table of the Circuit

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An actuator which converts electrical signal into rotation”.

Electrical motor

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Why only DC motor?

We all know that AC motors are normally constant speed motors. Variable speed ac drives uses very complex circuitry because the ac motor speed is varied by the frequency variation and is not quite easy.

Stepper motor gives calculated angle of rotation they take number of steps in one revolution they cannot be stopped in between the step. Also they are not constant running motors their use is limited to the area where you want calculated steps to be taken such as printers, plotters, and other similar applications.

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Dc motors are widely used in industry where wide range of variable speed is required.

High starting torque & easy speed variations are some of the other characteristics of DC motors.

Advantages of DC motor:-

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Step1: Initialization of I/O ports. Step2: Set Direction as Forward/ Backward/ Left/

Right. Step3: check if any obstacle is detected according to

that change the motion of Robot. If no then Robot will goes in forward direction.

Step4: Wait for some time. Step5: go to step 3 to repeat the process. Step7: Wait for some time. Step 8: End

ALGORITHM

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FLOW CHART

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Advantages : Whenever robot senses any obstacle automatically diverts its position to

left or right and follows the path without human guidance. The programming of the microcontroller is easy. It is a low cost circuit.

Disadvantages : It is time consuming project. It is use for short distance only. It is not recommended to keep the range very long because this would

cause the ROBOT to keep moving forward and backward as it senses any obstacle, even far away from it.

It is not in human control

Advantages & Disadvantages

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ApplicationsObstacle sensing robot can be applied at the

toys where small children will play.It can used for the army application.We can apply number pairs of IR pairs for the

safe direction control of the robot. In Mines.

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FUTURE ASPECTS:We can extend this project with wireless

technology by IR (or) RF.This robot can be used for pick and place the

required object by giving directions to the robot but IR pair should be replaced depending upon the application.

By doing extra things, it can be use in Army application.

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Photographs:

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ReferencesBOOKS:

1.The 8051 microcontroller & Embedded System

( Mazidi , Pearson Education ,III edition)2.Mechatronics Principle and Applications

(Godfrey Onwobolu, Pearson Education)3.Embedded System ( Rajkamal, Pearson Education, II edition)4. .Introduction to Robotics

(Vikram Kapila, Pearson Education,IV Edition)

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Website:http://mechatronics.poly.eduhttp://www.roboticswikipedia.comhttp://www.mecatronicswikipedia.comhttp://www.datasheets.comhttp://www.J2RScientific.comhttp://www.expresspcb.comhttp://www.kiel51.comhttp://www.8051microcontroller.com

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The power of imagination makes us infinite.

Presented by : YUSUF INAMDAR and

IRFAN AHMAD