多功能自动拨号报警系统设计参考.doc

摘 要 随着当今社会经济的飞速发展和人民生活水平的大幅度提高，人们对工厂、机关和居家等场所的安全性提出了更高的要求，目前市场上出现了较多的家庭安防报警装置。、信号的自动检测该系统成本低、实用、功能灵活多样, 关键词：AT89S52；探测电路；自动拨号；语音报警 Abstract With the rapid development of our society and economy and the significant progress of peoples living standard, people have gradually set higher demand in the area of factory, household, workplace’s safety .Currently, numerous home security alarm devices has existed in the market. In certain extent, however, the traditional alarm systems has to come to face some inevitable deficiencies: low sensitivity of the detection circuit， high rate of mistakes, interference in normal use, the cumbersome usage, failure in recording the time of danger, and inconvenience to trace the reasons. This paper intends to device a reliable operation, call multi-functional and automatic dialing alarm system, which is convenient to operate. In this system, AT89S52 is used as the central control chip, the public communications network is used as a transmission medium, and the voice chip ISD1420 is used to voice alarm, the clock chip DS1302 is used to record the time which will be displayed on the LCD. The system has strong reliability on account of the hydroelectric infrared sensor，the temperature sensor DS18B20 and the smoke sensor MQ-2 are used as the detection devices in the system. After design, fabrication and commissioning, the following functions can be well achieved: firstly, automatically detecting the signals of theft and fire; secondly, timely giving an alarm of sound and light ( including automatic telephone dialing alarm, voice playback and light alarm) and recording, displaying the alarm time when dangers occur. This system is predicted to be low cost, high practicality and reliability, and will be widely used. Key words: AT89S52; Detection circuit; Automatic dialing; Voice alarm 目 录 1 绪论 1 1.1 引言 1 1.2 多功能自动拨号报警系统的发展现状 1 1.3 多功能自动拨号报警系统的发展趋势 2 2 系统总体方案设计与确定 3 2.1 自动拨号设计方案的比较与确定 3 2.1.1方案一 3 2.1.2方案二 3 2.1.3方案的确定 3 2.2 总体方案设计 3 2.