23-08-2012, 04:54 PM
MICROCONTROLLER BASED LPG GAS DETECTOR USING GSM MODULE
MICROCONTROLLER BASED LPG GAS DETECTOR USING GSM MODULE.pdf (Size: 973.38 KB / Downloads: 502)
ABSTRACT
Ideal gas sensor is used 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. The sensor can also sense iso-butane, propane, LNG and cigarette smoke.
If the LPG sensor senses any gas leakage from storage the output of this sensor goes low. This low signal is monitored by the microcontroller and it will identify the gas leakage. Now the microcontroller is turn on LED and Buzzer. After few milliseconds delay, it also turn on exhaust fan for throwing gas out and continue send messages as „GAS LEAKAGE‟ to a mobile no. , written in c-code.
INTRODUCTION
MQ-5 Semiconductor Sensor for Combustible Gas Sensitive material of MQ-5 gas sensor is SnO2, which with lower conductivity in clean air. When the target combustible gas exist, the sensors conductivity is higher along with the gas concentration rising. We use simple electro-circuit, convert change of conductivity to correspond output signal of gas concentration. MQ-5 gas sensor has high sensitivity to Methane, Propane and Butane and could be used to detect both Methane and Propane. The sensor could be used to detect different combustible gas especially Methane, it is with low cost and suitable for different application.
BLOCK DIAGRAM DESCRIPTION
MQ-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, Buzzer and 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.