基于-单片机的烟雾报警器的设计分析实现

1、编号航空航天大学金城学院毕业设计题 目基于单片机的烟雾报警器的设计与实现学生指导教师二一五年五月航空航天大学金城学院本科毕业设计（论文）诚信承诺书本人重声明：所呈交的毕业设计（论文）（题目：基于单片机的烟雾报警器的设计与实现）是 本人在导师的指导下独立进行研究所取得的成果。尽本人所知，除了毕业设计（论文）中特 别加以标注引用的容外，本毕业设计（论文）不包含任何其他个人或集体已经发表或撰写的 成果作品。作者签名：2015年5月10日（学号）：基于单片机的烟雾报警器的设计与实现摘要人们的生活变得越加智能化，电器使用越加频繁，消防工作就越加重要。为了防止 和减少火灾带来的巨大损失，需开发一种结构简单

2、，经济适用的家用烟雾报警器并配合 完善的监控报警系统。本报警器由单片机最小系统、温度、烟雾传感器两部分构成，加上其他设备可实现 检测环境温度、烟雾等气体浓度并声光报警。本设计中选择STC89C52单片机作为控制元件，由于需要探测围广、高灵敏度和优秀的稳定性的特点，故选用了MQ-2烟雾传感器。报警器主要由烟雾信号采集，烟雾报警器模拟-数字转换电路，微处理器控制电路， 显示电路，声光报警电路和安全电路组成，设计合理，操作简单易懂，性价比高。烟雾报警器能够及时反映周围环境情况，发现温度烟雾异常和实时发出警报，从而 降低火灾的危险性和各类损失。关键词：烟雾报警器，单片机，传感器Desig n and

3、impleme ntati on of smoke alarmbased on microc on trollerAbstractWith the social and econo mic developme nt, peoples lives become in creas in glyin tellige nt use of electrical applia nces has become in creas in gly freque nt, so the fire service has become in creas in gly importa nt. To preve nt fi

4、res and reduce fire caused casualties and financial losses,so we need to develop a means simple, affordablehome smoke alarms and with a sound alarm and monitoring systems, in order to meet market dema nd. Smoke alarms for the home-based microc on troller should have the basic desig n and fun cti on,

5、 we desig n and expla in a smoke alarm.The alarm system is mai nly composed of MCU and temperature, smoke sen sorsin two parts, plus other equipment to achieve the implementationof the gasconcen trati on detecti on ambie nt temperature, smoke, etc. and only sound and light alarms. This desig n choic

6、e STC89C52 microc on troller as a control eleme nt, the n eed for a wide range of detect ion characteristics of high sen sitivity and excelle nt stabilityI chose MQ-2. Mai nly by the smoke alarm sig nal acquisiti on and pre-amplifier, thesmokealarmanalog- digitalconversion circuit, microprocessor co

7、ntrolcircuit,displaycircuit,soundand lightalarm circuit and safety circuit, reas on abledesig n,easy to un dersta nd, in expe nsive, its high cost. The main part of this paper for thealarm function of various components and systems for a detailed descriptionandin terpretati on software desig n and s

8、ystem an alysis and in terpretati on.I wish every family a home smoke alarm is in stalled, it can reflect theen vir onmen talcon diti ons around more sen sitivetha nthehuma nsen ses.Temperature ano malies found smoke, real alerts and phone alarm. Can help peopleran out of the dan ger zone in time, r

9、educe the risk of fire and types of lossesKey words :The smoke alarm; MCU; sen sor目录摘要iAbstract ii第一章绪论.-.1.1.1设计概述-.1.-.1.2烟雾报警器的现状及发展-.2.-1.3课题研究的目的和意义 -2-1.4毕业设计基本容-.3.-.第二章 系统的总体方案设计 -.4.-.2.1系统总体功能介绍-.4.-.2.2报警系统工作原理-.4.-.2.3烟雾传感器和单片机的选择 -.5.-2.3.1烟雾传感器介绍与选择 -.5.2.3.2 stc89c52 单片机简介-6-233单片机的引脚功能描述-.6.2.4 温度传感器选择 -.8.-.2.5本章小结第三章系统硬件电路.-.9.-.3.1单片机最小系统-.9.-.3.1.1复位电路-.9-.3.1.2 晶振电路-.10.3.1.3 电源选择-.1.1.-3.2烟雾检测AD采集电路.-.1.1.-3.4声光报警控制电路设计 -.1.3 -3.5按键控制电路 -.1.3.-3.6温度传感器（DS18B20 ）电路.-.1.4 -3.6.1DS18B20 简单介绍-.1.4 -3.6.2 DS18B20 的工作原理.-.14 -3.6.3 DS18B20 供电方式电路图 -.15 -第四章系统软件