06-12-2012, 06:11 PM
MICROCONTROLLER BASED SECURITY ACCESS SYSTEM IN HOME AUTOMATION
MICROCONTROLLER BASED SECURITY ACCESS SYSTEM IN HOME AUTOMATION.docx (Size: 25.05 KB / Downloads: 28)
ABSTRACT
LPG gas is supplied in pressurized steel cylinders. As this gas is heavier than air, when it leaks from a cylinder it flows along floor and tends to settle in low spots such as a basement. This can cause fire or suffocation if not dealt with. Here is a circuit that detects the leakage of LPG gas and immediately on cooling fan by the same time automatically lock cylinder knob.
This LPG Gas Sensor (MQ6), ideal sensor for use to detect the presence of a dangerous Liquefied petroleum gas (LPG) and it has high sensitivity to propane, butane, isobutene, natural gas. The sensor can also be used to detect combustible gases, especially methane. This circuit can detect leakages in your Home, car or in a service station, storage tank environment. This unit can be easily implemented to industrial level by upgrading its ranges.
This project is designed to detect the LPG from 200parts per million (PPM) to 10,000 PPM. Whenever there is LPG concentration of 1000 ppm (parts per million) in the area, the OUT pin of the sensor module goes high. This signal drives Relay so colling fan automatically goes to on stage.
GAS SENSOR(MQ-6):
The SEN-1327 gas sensor module from Rhydo LABZ, kochi is used in this circuit. This LPG Gas Sensor (MQ6), ideal sensor for use to detect the presence of a dangerous Liquefied petroleum gas (LPG) and it has high sensitivity to propane, butane, isobutene, natural gas. The sensor can also be used to detect combustible gases, especially methane. This sensor has a high sensitivity and fast response time
FEATURES:
• Uses the MQ-6 LPG Gas Sensor
• Easy SIP interface
• Compatible with most microcontrollers we can upgrade this to provide SMS alerts also
• Onboard Status and Power LED
• Onboard Pot for threshold setting
• On board microcontroller
• This sensor has a fast response time
• Good sensitivity to Combustible gas in wide range
• Long life and low cost
• Simple drive circuit
• High sensitivity to Propane, Butane and LPG