MICROCONTROLLER BASED LPG GAS DETECTOR USING GSM MODULE

Presented by:KIRTI PRAKASH(212102)MANISH PATEL(212124)

MICROCONTROLLER BASED LPG GAS DETECTOR USING GSM MODULE

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CONTENTS Introduction Block Diagram Description Working Flow ChartConnection Between Microcontroller & GSM Module AdvantagesApplicationConclusion

INTRODUCTIONThe presence of dangerous LPG leakage in the homes can be detected using the Ideal Gas Sensor.This unit can be easily integrated into a unit that can sound an alarm or make a call on your mobile.It can also turn off the power supply of our home. The sensor can also sense iso-butane, propane,LNG and cigarette smoke.

BLOCK DIAGRAM

BLOCK DIAGRAM DESCRIPTIONMQ-5 LPG SENSOR : It senses the leakage of LPG. The out put of this sensor is high at normal condition. The output goes low, when it senses the LPG.MICROCONTROLLER: It is the whole control of the project. It controls the Exhaust fan, LED and Buzzer when LPG leak occurs. The input/ output ports of the microcontroller is used for this. EXHAUST FAN : This is used to send out the LPG to space and then the concentration of LPG is reduced.

Buzzer : When buzzer is blowing, this indicates the leakage of LPG gas. It is 12 V DC operated buzzer. LED : When LED is glowing, this indicates the leakage of LPG gas. It is 1.2 V DC operated LED.

WORKINGThe output of the sensor goes LOW as soon as the LPG sensor senses any gas leakage from the storage. This is detected by the microcontroller and gives direction to make a call using GSM Module and to turn off the power supply using by power control unit. MQ-5 semiconductor sensor is Combustible Gas Sensitive. The MQ-5 gas sensor is made up of SnO2 which has lower conductivity in clean airA simple electro-circuit is used here which is used to convert the changing conductivity into corresponding output signal of gas concentration

Methane and Propane can be detected easily by MQ-5 sensor because it has high sensitivity towards Methane, Propane and Butane. It is a low cost sensor suitable for different application.

startPower OnMCU sendsAT toGSM ModuleGSM module replies OKIs sensors o/p value is greater than threshold value ?Turn on LED & buzzerStart Exaust fanSend message to stored mobile no.NoYesNoYesFLOW CHART

CONNECTION BETWEEN MICROCONTROLLER & GSM MODULEFor connection, connect Receiver Pin (Rx) of Microcontroller to Transmitter Pin (Tx) of GSM Module and Transmitter Pin (Tx) of Microcontroller to Receiver Pin (Rx) of GSM Module.

AVRGSMRxTxTx

RxVcc

Vcc

ADVANTAGES

Detection and prevention of any sort of gas leakage.Cost efficient.Less complex circuit.No environmental effect or no effect of physical conditions.

APPLICATIONDomestic gas leakage detectorHomesPortable gas detector factoriesIndustrial Combustible gas detectorLpg storageGas car

CONCLUSIONThe previous listed applications of this GSM based security system are based on the fact that this system is able to detect any sort of gas leakage.In case there is a gas leakage in a house,hotel or in a laboratory, this security system will simultaneously complete two tasks Firstly it will turn off the power supply, secondly it will connect a call to the predefined number listed in the program.Due to this simultaneous action accidents can be prevented.

THANKS FOR PATIENT LISTINING