摘要：当今社会火灾已成为危害人生命的最可怕的灾难之一，即使在高级的大楼会所也会存在安全隐患，预防火灾发生时当务之急，那么火灾已经发却没有被及时发现，将会引发更严重的后果，带来巨大的财产损失，更严重的将危害人的性命。所以要将火灾扼杀在摇篮里。76336

本论文将说明如何运用以STC12C5410AD和MC101型半导体为核心，实现烟雾感知及起到警报的作用。系统由单片机、传感器、前置放大器电路、显示装置、键盘电路、声光报警电路、模式切换电路、电源电路的A/D转换模块和监视器模块，继电器控制电路组成。发生火灾时小信号放大电路，用于放大输出电压，显示烟雾浓度电路。键盘电路被用于调节报警极限和消音器。过载烟雾报警器用于切换测定其中的可燃烟模式切换电路。电源电路为系统提供一个稳定的电压。最终达到根据烟雾浓度显示并报警的作用。

将实现成本低，技术简单，灵敏度高，结构稳定等优势的烟雾报警系统装置，能应用到现实生活中去。

毕业论文关键词：烟雾，报警器，单片机，烟雾传感器 

Abstract: In today's society, the fire has become a hazard to human life the most terrible disaster in, even in advanced clubhouse building will be the existence of security risks, prevention of fire when urgent, so fire has been sent but are not found in time, will cause more serious consequences, bring huge property losses, more serious will harm people's life。 So it's going to kill the fire in the cradle。

This paper will explain how to use the STC12C5410AD and MC101 type semiconductor as the core, realize smoke sensing and play the role of alarm。 System consists of a single chip computer, sensor, preamplifier circuit, display device, a keyboard circuit, an acousto-optic alarm circuit, a mode switching circuit, power supply circuit, A/D conversion module and a monitor module, a relay control circuit。 But when a fire occurs in a small signal amplifying circuit, is used for amplifying the output voltage sensitive components; display circuit of smoke concentration; keyboard circuit is used to adjust the alarm limit and silencer; line overload smoke alarm alarm; switch is used for the determination of the combustible smoke mode switching circuit, power supply circuit for the system to provide a stable voltage。 Finally achieved according to the smoke concentration display and the role of the police。

Low cost, simple technology, high sensitivity, structural stability and other advantages of smoke alarm system device, can be applied to real life。

Key words: Smoke ,Smoke alarms, SCM, smoke sensor

目录

1绪论 3

1。1 概述 3

1。2 设计烟雾报警系统的意义和现状 3

1。3烟雾报警系统的发展趋势 4

2烟雾报警系统的设计方案 4

2。1。烟雾报警系统的设计思路 4

2。2烟雾报警系统的设计框图 4

2。3烟雾传感器的介绍 5

2。4烟雾传感器的选型 5

2。5 MC101型烟雾传感器的特点及应用 6

2。6 MC101型传感器的主要技术指标 7

2。7烟雾检测报警系统的结构 8

2。8烟雾检测报警系统的功能 8

3烟雾报警系统的硬件设计