Intelligent Residential Security Fire Alarm System

With the rapid development of communication technique and great improvement of standard of people's living, the need of house has been changed from only the living space to multiform needs of quality, function, service, and so on. -A kind of intelligent alarm system for residential area is introduced. It includes the functions of theft-proof and fireproof, performing automatic detection and automatic dial. Pyroelectric infrared sensor and Microwave sensor combined are used for theft-proof so as to realize automatic detection. Temperature sensor Photoelectric smoke sensor and CO sensor are integrated to a compound detector for fireproof. Multi-sensors make the least false alarm and enhance the reliability of system. Automatic dial means that it can send help voice through public telephone switch network to the bureau. When the sensor of fireproofing or burglarproof detects any off normal signal, an interrupt request is sent to the MCU. Next the MCU control the interface module of telephone to accomplish off hook. According the kind of dangerous, the dialing module will automatically dial the right phone number such as the phone number of surveillant center.The system discerns the master by the secret code. Only imputed correct secret code, could system be closed. Each module is controlled by a microcomputer and they communicate each other by profibus-DP in order to achieve credible transmission. The computer in surveillant center will display the information as soon as it inquires the alarm signal. Definite functions such as alarm information query, user-info management and operator's info management can be realized. The system is designed by considering the anti-interference in the side of the hardware and software. It can work with high reliability.