基于单片机的住宅智能安防系统设计

Design of Intelligent Security System Based on AT89C51MCU

基于公共电话网的自动防灾报警系统,当系统检测到非法入侵者及火灾、煤气泄漏等报警信号时,报警主机发出报警声,同时通过电话线将警情报告给数个指定电话,保障财产及生命安全;设计是以单片机AT89C51,双音多频解码集成电路MT8888、ISD1420芯片、AT24C02串行EEPROM为核心;红外探测器、门磁探测器、感烟探测器、燃气泄漏探测器等探测灾情;当有非法入侵时,单片机执行中断程序,播放的语音,震慑盗贼,使其停止盗窃行为并自动拨打设定好的手机号码,起到防盗的作用;当有火灾及有害气体泄漏等灾情发生时,通过拨打设定号码,保护财产安全。

This paper designs an auto alarm system based on the public switched telephone network. When the system examines illegal intruder or fire, gas leakage, the main engine sends out the warning sound sim- ultaneously, it report the police sentiment to several assigned telephone through telephone line, to safe- guard property and the safety. The design＇ cores are monolithic integrated circuit AT89C51, double sound multi-frequency decoding integrated circuit MT8888, the ISD1420 chip, AT24C02 serial EEPROM. Infra- red acquisition aid, gate magnetic probe, feeling smoke detector, fuel gas divulging and so on detectors detect disaster situations. When illegal intruder invades, the monolithic integrated circuit executes inter- ruption procedure, the broadcast pronunciation to frighten thieves. All these make thieves stop burglary be- havior and the automatically dials established number to play the security role. When disaster situations and fire or noxious gas divulging occurs, the system could dial hypothesis number to protect the property security.