毕业论文火灾报警系统(完整版).doc

摘 要 随着智能现代化的高档住宅小区的建成，人们的生活习惯也逐渐的由过去的燃气罐转换成现在方便快捷的燃气管道。然而在这给人民带来快捷方便的生活背后，也使得生活中的安全隐患再逐步加大，一旦发生火灾，将对人的生命财产造成极大的危害，因而火灾报警控制器肩负着安全防范的重任，在现代化的建筑中起着极为重要的安全保障作用。 本文设计了一款基于CAN总线的可燃气报警控制器，用来检测家庭，整栋楼，甚至整个小区的燃气安全状态。该可燃气体报警控制器能够显示现场可燃气体的浓度，能够通过软件设置可燃气体的报警阈值，当可燃气体浓度超限时，控制器发出声光指示，并能同时启动报警输出设备。该报警控制器主要是由电源，主控制器AT89S52单片机，CAN通信模块单元，LED显示模块单元，键盘模块单元，时钟模块单元，故障输出模块单元，报警输出模块单元等几部分组成。其中CAN控制芯片SJA1000和CAN接口芯片组成CAN总线的收发模块，负责向主控制器发送采集到的现场信息。 本论文共分六部分介绍。第一部分是绪论，介绍了国内外火灾报警系统发展的历史、现状、趋势以及火灾自动报警系统的分类，简要说明了研究火灾报警系统的意义；第二部分是火灾自动报警控制器的总体设计；第三部分是硬件组成及原理，分别介绍了主控制器AT89S52单片机、总线控制器SJA1000的工作原理及特点, PAC82C250,高速光电藕合器6N137,LED显示，扩展芯片8155等；第四部分是火灾自动报警控系统的软件，包括初始化，报文的发送与接收，CAN的检测及显示;第五部分是总结。 关键词：AT89S52单片机, CAN总线，可燃性气体，控制器 Abstract With the modern high-grade construction of residential quarters, peoples living habits have gradually converted from the past gas tank to the convenient and efficient gas pipeline. However, it brings convenient to people’s living, but makes life of the security risks to gradually increase the event of a fire, peoples lives and property would suffer a lot.Thus shouldering a fire alarm control security ,it plays an extremely important role in the safety and security. In this paper,we designed a gas alarm controller Based on CAN which can be used to detect the gas safety of families, entire building, or even the whole area of the state. The combustible gas alarm controller can show the concentration of combustible gas at the scene, the software can be set up through the combustible gas alarm threshold, when the concentration of combustible gas gauge, sound and light controllers sent instructions, and can also activate alarm output device. The report is mainly consitituted from the power, the main controller AT89S52 MCS, CAN communication modules, LED display modules, keyboard modules, the clock modules, fault output modules, alarm output modules, etc. One CAN controller chips and SJA1000 CAN CAN Bus interface chip components of the transceiver module is responsible for sen