摘要：当今社会，轨道交通解决了人口运输问题，但是在铁路高速发展的同时，安全问题也成为我们最为关心的问题。火灾是威胁轨道交通最大的安全问题，因此火灾报警系统是列车最不可或缺的安全设施。选取51单片机,以ADC0809转换芯片、MQ-2烟雾传感器、DS18B20数字温度计和蜂鸣器等元器件形成一有机整体，利用传感技术完成报警。该系统采取的是对温度和烟雾信息的采集，放大这些样本，单片机按照预先写入的程序对这些样本进行处理，判断是否符合报警条件，可设置烟雾浓度和高温报警值，可手动报警，让蜂鸣器响。57934

本策划还研究了列车火灾特点，列车火灾报警系统的安装数量与位置。根据列车火灾的严重性我们意识到报警器的严重性。从而策划出这一列车火灾报警系统。

毕业论文：火灾报警；列车火灾；传感技术；单片机。

Train fire automatic alarm system

Abstract: in today's society, rail transit transportation solves the problem of population transportation, but with the high-speed rail transit development at the same time, the security problem has become a problem we most concerned about.

Fire is the biggest threat to the safety of rail transport, so the fire alarm system is the most important safety equipment train. Using 51 single chip, with ADC0809 conversion chip, MQ-2 smoke sensor, DS18B20 digital thermometer and buzzer and other components to form an organic whole, the use of sensing technology to complete the alarm. Adopted by the system is the acquisition of information on the temperature and smoke, to enlarge the sample, SCM according to the pre written procedures for these samples for processing, judge whether it meets the alarm condition, set the smoke concentration and high temperature alarm value, manual alarm, let the buzzer.

The design also studied the characteristics of the train fire, the number and location of the installation of the train fire alarm system. According to the severity of the train fire, we realize the severity of the alarm. 

Key words: fire alarm; train fire; sensing technology; single chip microcomputer

 目录

1绪论 1

1.1课题背景 1

1.2国内外研究现状及水平 2

  1.3本文主要工作与安排 3

2火灾报警的策划 3

2.1单片机 3

2.2数字传感器 5

  2.3烟雾检测AD采集电路 6

  2.4单片机最小系统 8

  2.5报警电路 9

  2.6按钮操纵电路 9

3报警软件策划 9

4列车火灾与报警器安装 11

4.1 列车火灾的特点 11

  4.3安装设备类型 12

  4.2 安装位置以及数量 12

4.4火灾探测器模块组成 13

  4.5 系统的构成之总策划方案 14

4.6 列车火灾逃生方案 16

5总结与展望 16

致谢 17

参考文献 18

附录 19

 1绪论