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06-10-2016, 11:17 AM
Post: #1
GSM BASED GAS LEAKAGE DETECTION SYSTEM


.pptx  1457975535-GSMfinalppt2.pptx (Size: 555.47 KB / Downloads: 5)



INTRODUCTION

The aim of this project is to automatically detect the gas leakage in vulnerable premises.
Gas leakage detection is the process of identifying 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 is arranged on a bread board.


COMPONENTS USED IN THIS PROJECT

Gas sensor - To sense LPG.
Arduino- To read MQ-5 output and to detect gas leakage.
Relay circuit- To stop the power supply.
GSM module-To send SMS to mobile.
Buzzer-To produce alarm sound.


GAS SENSOR

A GAS SENSOR is an electronic device which Detects dangerous gas leaks in the industrial areas.
This unit detects 200 to 1000ppm .
High sensitivity to Propane, Butane and LPG.
Long life and low cost.



GSM MODULE

A GSM modem is a specialized type of modem which accepts a SIM card, and operates over a subscription to a mobile operator, just like a mobile phone
Advantage of using this modem will be that you can use its RS232 port to communicate and develop embedded applications. Applications like SMS Control, data transfer, remote control and logging can be developed easily.
AT commands are used to communicate with GSM.
GSM modems can be a quick and efficient way In most parts of the world, GSM modems are a cost effective solution for receiving SMS messages, because the sender is paying for the message delivery.

ARDUINO

Arduino is an open-source used for building electronics projects.
Arduino consists of both a physical programmable circuit board and software.
The Arduino does not need a separate hardware it uses a simplified version of C++.
14 digital I/O pins and 6 analog pins.
32 kb Flash memory and 1kb EEPROM.
It runs on Mac, Windows, and Linux.


OPERATION OF THE CIRCUIT

First we have to apply 9v dc to the Vcc pin of the microcontroller.
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 AT89S51 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 gas is detected by the sensor then the buzzer is starts buzzing and motors will stop until we press the reset button.


ADVANTAGES


Low power consumption and reliable.
The advantage this has over others is that it provides quick response rate and has faster diffusion of the critical situation than the manual methods.
All the reviewed works aimed at developing systems capable of detecting gas leakages and sending an SMS alert to the user. 
The system enables monitoring of gas leakages in remote locations and thereby leads to a faster response time in the events of a leakage condition.


CONCLUSION

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.
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