Fire Alarm System Essay

I. INTRODUCTION
A fire alarm system is number of devices working together to detect and warn people through visual and audio appliances when smoke, fire, carbon monoxide or other emergencies are present. These alarms may be activated from smoke detectors, and heat detectors. Alarms can be either motorized bells or wall mountable sounders or horns. They can also be speaker strobes which sound an alarm, followed by a voice evacuation message which warns people inside the building not to use the elevators. They may also be activated via manual fire alarm activation devices such as manual call points or pull stations. Fire alarm sounders can be set to certain frequencies and different tones including low, medium and high, depending on the country

The main units of this proposed system are:
1. Sensor: Heat sensor (H) and smoke sensor (S) senses the fire. Signal from sensor activates the ID sender unit
2. ID sender unit: ID sender gives the address of the room or block where fire is detected and passes that address to the data line.
a. Data line: That ID [in binary] of the room passes to display unit via data line [CAT5]. Data line also carries the signal to send fire alert message and to
ON the pump for water supply for extinguishing the fire.
b. Memory unit: This unit holds the address of the room/block until the total system made OFF again.
c. Display unit: Display unit displays the ID of the room which is on fire
d. SMS (Short Message Service) sender: A SMS will be sent to fire brigade and registered mobile numbers to activate the pump automatically.
e. Pump starter unit water supply will be given in this room through sprinkler system
ب. Power supply: AC 230 v or 12 v DC.

b.. CONCLUSIONS AND DISCUSSION
In this, paper we proposed an automatic fire alert and fire distinguishing system by sensing smoke and heat. We have experimented our proposed system in our