GAS DETECTION ROBOT

BYJAGADEESH.B

09RM1A0414(ECE)

Gas leak detection is the process of identifying potentially hazardous gas leaks by means of various sensors.

These sensors usually employ an audible alarm to alert people when a dangerous gas has been detected.

The total circuit units are arranged on a movable board. This board moves by the two dc stepper motors.

INTRODUCTION

BLOCK DIAGRAM

CIRCUIT DIAGRAM

AT89S52 microcontrollerGas sensorULN2003 driverBuzzerDc motorsPower supply Kiel software

COMPONENTS USED IN THIS PROJECT

The AT89S52 is a low-power, high-performance CMOS 8-bit micro controller with 8Kbytes of in-system programmable Flash memory.

The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 micro controller.

By combining a versatile 8-bit CPU with in-system programmable flash one monolithic chip; the Atmel AT89S52 is a powerful micro controller, which provides a highly flexible and cost-effective solution to many embedded control applications.

AT89S52 Microcontroller

A NATURAL GAS DETECTOR is an electronic device which Detect dangerous gas leaks in the kitchen or near the gas heater. This unit detects 300 to 5000ppm of Natural Gas.

Types of Gas Detectors Electrochemical Detectors Infrared Point Detectors Infrared Imaging Detectors Semiconductor Detectors Ultrasonic Detectors Holographic Detectors

GASA DETECTORS

The UTC ( unisonic technologies co. ltd) ULN 2003 is high-voltage, high-current Darlington driver comprised of seven NPN Darlington pairs.

Ideally suited for interfacing between low-level logic circuitry and multiple peripheral power loads, the series ULN20xxA/L high-voltage, high-current Darlington array feature continuous load current ratings to 500mA for each of the seven drivers.

ULN2003 DRIVER

ULN2003 WITH DC MOTOR

A buzzer or beeper is a signaling device, usually electronic, typically used in automobiles, household appliances such as a microwave oven, or game shows .

BUZZER

KIEL SOFTWARE

It is a cross compiler A cross compiler is similar to the compilers but we write a program for the target processor (like 8051 and its derivatives) on the host processors (like computer of x86) Keil Software provides you with software development tools for the 8051 family of microcontrollers. 8051 project development cycle: - These are the steps to develop 8051 project using keil.

Create source files in C or assembly.Compile or assemble source files.Correct errors in source files.Link object files from compiler and assembler.Test linked application.now let us start how to work with keil.

First we have to apply 9v dc to the Vcc pin of the microcontroller through regulators.

The reset pin is used to clear all the values of temporary register of microcontroller.

Crystal oscillator is connected between the 18,19 pins of the microcontroller here the crystal frequency is 11.0529mhz.

The ULN2003 driver is used as h-bridge and also as a current amplifying ic to increase the power to drive the motor.

Here we use two side shaft dc motor to wheels with 300rps and the power to the motors is from the ULN2003.

The microcontroller AT89S52 is used to control the total system by its internal program code.

When we press the reset button the dc motors starts and travel its predefined area and when Co gas is detected by the sensor then the buzzer is starts buzzing and motors will stop until we press the reset button.

OPARATION OF THE CIRCUIT

It is used in gas industries. It is used in mining of coal and

other materials. It is used in municipal gas

distribution It is used in nuclear power stations

APPLICATIONS

In future, more detecting systems like any gas detection systems can be implemented.

Additional features includes more secure systems like a call will be gone to a telephone number if a gas leakage and fire in a n/w area like LAN and internet used to world wide 

FUTER SCOPE

This project is microcontroller based project. A Gas sensor is used to detect dangerous gas leaks in the kitchen or near the gas heater. Ideal to detect dangerous gas leaks in the kitchen. The sensor can also sense LPG and Coal Gas as well as Ideal sensor for use to detect the presence of a dangerous LPG leak in your car or in a service station, storage tank environment. This unit can be easily incorporated into an alarm unit, to sound an alarm or give a visual indication of the LPG concentration. The sensor has excellent sensitivity combined with a quick response time.

CONCLUSION

SOME GAS LEAKAGE SITUATIONS