文档介绍：摘要
近年来全国火灾事故频繁发生,造成人、财、物的巨大损失。以前,火灾的报警和控制都很落后,造成了巨大的损失。现在,用户对火灾报警以至自动消防系统的要求越来越高,对火灾预防的意识也越来越强烈。因此,对火灾的报警系统是很重要的。
在硬件设计方面,本论文选用MQ-2型半导体可燃气体敏感元件烟雾传感器实现烟雾的检测,DS18B20温度传感器实现温度检测,A/D转换器实现模拟信号转换成数字信号,外加声光报警电路。外围设备,结合单片机AD89C52芯片控制电路,实现报警提示。
软件方面,设计了烟雾检测以及温度检测的数据采集子程序,声光报警模块程序等。以AT89C52单片机和MQ-2型半导体电阻式烟雾传感器及数字式温度传感器为核心设计的火灾报警器可实现声光报障自诊断、报警限设置、延时报警及等功能。是一种结构简单、性能稳定、使用方便、价格低廉、智能化的烟雾报警器,具有一定的实用价值。
关键词: 报警器烟雾传感器温度传感器
Abstract
In recent years, the national fire accident occurred frequently caused by human, financial, material great loss. Previously, fire alarm and control is very backward, caused great loss. Now, the user to the fire alarm and automatic fire system requirements more and more high, to fire prevention awareness is increasingly strong. Therefore, the fire alarm system is very important.
In terms of hardware design, this paper selects MQ - type 2 bustible gas ponents smoke sensor realize smoke detection, DS1820 temperature sensor realize temperature detection, A/D converter simulating signal converted into digital signals, plus the acousto-optic alarm circuit. Peripherals, combined with single-chip puter AD89C52 chip control circuit, realize alarm prompt.
Software, design the smoke detection and temperature testing data acquisition subroutine, sound-light alarm module procedures, etc. By AT89C52 single puter and MQ - type 2 semiconductor resistive smoke sensor and digital temperature sensor as the core design can realize the smoke alarm sound the alarm limit BaoZhang since diagnosis, set, delay alarm and etc. Function. Is a kind of simple structure, stable performance, easy to use, inexpensive and intelligent smog announciator, has certain practical value.
Key words: Alarm smoke sensor temperature sensor
目录
第1章绪论 1
课题研究的目的和意义 1
国内外研究现状 2
本文的主要内容 3
第2章火灾报警器系统总体设计 4
系统组成 4
系统控制方案设计 4
系统总体方案设计 5
系统控制器的选择 5
检测元件的选择 7
输入通道方案选择 10
外围设备的选择 10
第3章系统硬件设计 14
控制单元电路设计 14
引脚特性 14
晶振电路设计 1