The Research And Design Of The Family Alarm System Based On Single-Chip Microcomputer

Intelligent security technology has been developed for 20 years. As an essential part of intelligent household, security wireless system has been used universally. Compared to the traditional security measures that are poor safe and expensive, the wireless alarm system that used wireless control and multi-sensor acquisition is developed in this paper.This system is consisted of alarm signal achieving and processing part and alarm response part. The working principle of alarm signal detection and treatment part is the signal by which is collected by infrared sensors, magnetic sensors, fire detectors and the combustible gas detector is controlled and transported to the host family smart alarm. The signal can trigger interrupt handling procedures to achieve the various functions of alarm. Family intelligence alarm response part is constituted by four sections. They are audio amplifier, voice circuits, DTMF transceiver circuit and automatic phone pick or hang control.The system uses MCU technology,wireless network technology and wireless data transmission without re-wiring particularly it has been applied to the decoration users and the place of inconvenient cabling. The system is based on telephone networks, but independent of telephone and it will not affect the normal use of the telephone through voice prompts, and it is convenient to use.