室内空气质量检测系统硬件的设计与实现 室内空气质量检测系统硬件的设计与实现 摘 要本次设计一款以 STC89C52 单片机为核心，运用 Proteus 和 Altium Designer 设计一款室内空气质量检测系统，该系统包含主芯片模块、气体检测模块、人机交互模块、报警模块、远距离传输模块，该系统具有同时检测室内的温湿度、CO 浓度、甲醛浓度、甲烷浓度、PM2.5 指数。并通过液晶显示屏实时显示出来，当室内空气中的检测气体浓度超过报警值时，检测装置通过亮指示灯和蜂鸣器报警的方式来提醒用户室内有害气体超标，还可以通过 GSM 模块短信方式将室内空气质量信息发送到移动端。本次设计使用了 AD 转换器，采用两个 AD 转换器，将 CO 浓度传感器、甲醛浓度传感器、甲烷浓度传感器、PM2.5 传感器这四种传感器检测到的气体浓度的测量信号转换为单片机所需的数字量信号，同时在测量气体浓度的基础上加以改进，添加了额外芯片，用来搭载 GSM 模块，使空气质量检测系统拥有实时远程报警的功能，让本系统报警速度更快。关键词：室内空气质量；实时监测；硬件设计；GSM 模块 北京理工大学珠海学院 2020 届本科生毕业设计 北京理工大学珠海学院 2020 届本科生毕业设计Design and Implementation of Hardware for Indoor Air Quality Detection SystemAbstractThis design takes STC89C52 as the core, and uses Proteus and Altium designer to design an indoor air quality detection system, which includes main chip module, gas detection module, human-computer interaction module, alarm module and long-distance transmission module. The system has the function of simultaneously detecting indoor temperature and humidity, CO concentration, formaldehyde concentration, methane concentration and PM2.5 index. And through the LCD real-time display, when the detection gas concentration in the indoor air exceeds the alarm value, the detection device will alert the user that the indoor harmful gas exceeds the standard by lighting the indicator light and buzzer alarm, and also can send the indoor air quality information to the mobile terminal through t...
