1. MINI PROJECTS-LPG GAS
DETECTION WITH LCD
The gas is colourless and has a faint smell owing to the addition of a
chemical compound "mercaptan."
In LPG (liquefied petroleum gas) cylinders, the gas regulator allows
pressurised LPG to flow in its gaseous form to the burner.
Highly inflammable
LPG is highly inflammable and can burn even at some distance from
the source of leakage.
Most fire accidents are caused either owing to a poor-quality rubber
tube or because the regulator is not turned off. Even when the stove
knob is turned off, the supply of gas from the regulator to the burner
is on. If the knob turns on by accident, the gas leaks.
The rubber tube, which connects the cylinder to the stove, must be in
good condition. Cockroaches or rodents are attracted to the food
residue on the tube and damage the rubber. Hot vessels or splashing
oil may also burn a hole in the tube.
Once there is a gas leakage, lighting a match or switching on a light
or a fan is enough to ignite the gas and cause the cylinder to explode.
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2. Electrical fires are another cause of accidents. They are caused when
too many types of equipment are connected to the domestic power
line. The overload causes the wire insulation to melt and a short
circuit occurs.
Old light fittings and switches also cause short circuits. Unattended
irons, heater coils and other heating elements also lead to fire
accidents.
Proposed Idea:
In our Project we have used a LPG gas sensor for sensing the
LPG Gas level and singals the human by alarming and further more,
as a preventive action, the control energises a Mechanical Model
which is used to turn off the Regulator Knob. This is done with the
help of a stepper motor. For Gas Detection, LPG Gas Leakage sensors
are used.
The proposed block diagram is given below:
Power Supply unit
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3. Signal
Conditioning
Unit
PIC 16F877
LCD Display Microcontroller
LPG GAS FOUND
Relay
Driver
Stepper Motor Driver
ALARM
Mechanical Model For
Regulator Control
89 RANGARAJAPURAM MAIN ROAD,KODAMBAKKAM,CHENNAI-24
PL VISIT www.maastechindia.com,mobile:098402 34766