The Design Of Fire Alarm System

In our country, as a disaster, the fire has many characteristics, such as: mediocrity, breakage and influence. In recent years, the economy and the construction develop quickly, increasing of modern building, underground architecture and large-scale construction, the occasion of fire is increasing, the quantity of fire and the losing it leads to raise gradually, the intention of fireproofing is avoiding loss. In the instruction of industry and civil, hotel, grogshop, library, the department of scientific research and trade, the fire alarm system has become the necessary installation. The fire alarm system has important functions to the modern buildings. The fire alarm system controller is its core. We introduce the research of fire alarm controller and narrate its hardware and software. The fire alarm system controller is designed by the C8051F020 MCU, it has a high rate of capability and price, at the same time, it has many functions such as: handlers manage, alarm information inquire, detector manage, preparative alarm, the process of fire alarm, communication and so on. In the controller, the LCD display shows all kinds of fire alarm information.The detector's control circuits is designed by P87LPC762 MCU, it can detect and transmit the fire information. We design a coder for improving the system's adaptability and reliability.The communication mode of controller and detector is wireless, the core of wireless communication circuit is KB8825 dual frequency synthesizer, it is strong anti-jamming and low power. It is reliability to complete the wireless communication function between the controller and detector.The fire alarm system can avoid and reduce the fire harm. It settles the problem that the wire fire alarm system can not fulfill.