室内有害气体监测系统的设计目录1绪论.............................................................................................................................31.1研究背景与意义..................................................................................................31.2国内外研究现状..................................................................................................31.2.1国外研究现状...............................................................................................31.2.2国内研究现状...............................................................................................42总体方案设计.............................................................................................................52.1系统设计思想......................................................................................................52.2单片机的论证与选型..........................................................................................52.3显示模块设计与论证..........................................................................................62.4传感器选型..........................................................................................................62.4.1CO传感器....................................................................................................62.4.2PM2.5传感器设计.......................................................................................72.4.3甲醛传感器设计...........................................................................................83硬件系统设计.............................................................................................................93.1系统总体设计......................................................................................................93.2控制模块设计....................................................................................................113.2.1单片机引脚介绍.........................................................................................113.2.2单片机最小系统的设计.............................................................................133.3气体采集电路设计............................................................................................143.3.1A/D转换电路.............................................................................................143.3.2传感器接口硬件电路设计.........................................................................143.4电源模块设计....................................................................................................163.5显示模块设计....................................................................................................173.6按键模块设计....................................................................................................183.7声光报警模块设计............................................................................................193.8总体电路图........................................................................................................204软件系统设计...........................................................................................................204.1软件编译环境....................................................................................................204.2系统流程设计.............................................................
