目录1任务与要求..............................................................................31.1课题概述...........................................................................31.1.1本课题研究的现状............................................................31.1.2本课题研究的内容............................................................31.1.3本课题研究方案..............................................................41.2参数要求...........................................................................42PM2.5报警器测试仪设计与分析............................................................52.1设计背景...........................................................................52.2设计目的与意义...................................................................52.3需求分析一一设计要求.............................................................62.3.1功能指标要求...............................................................62.3.2工艺要求....................................................................62.4产品设计实施计划..................................................................63方案设计与论证..........................................................................73.1设计要求...........................................................................73.1.1系统概述....................................................................73.1.2系统框图...................................................................73.3.1主控模块...................................................................83.3.2显示模块...................................................................93.3.3键盘模块...................................................................93.3.4电源模块....................................................................93.3.5A/D转换器.................................................................103.3.6灰尘感应模块...............................................................103.4成本预算..........................................................................114.1硬件设计..........................................................................124.1