摘要：由于空气质量的恶化，阴霾天气现象出现增多，危害现象加重。中国不少地区把阴霾天气现象并入雾一起作为灾害性天气预警预报，统称为“雾霾天气”。由于“雾霾天气”有害于人体健康，因此，对该天气的预警预报就尤为重要，以便于人们采取防范措施，本设计就可以起到预警预报的作用。本设计采用STM32单片机作为控制中心，由GP2Y1010AU0F灰尘传感器测量PM2.5浓度，并采用DHT11温湿度传感器对周围环境进行温湿度的测量，通过LCD12864显示屏显示当前PM2.5浓度值、质量等级和温湿度值。当PM2.5浓度达到所设定限度启动声光报警。实践证明，该系统电路简单、工作稳定、集成度高，调试方便，测试精度高，具有一定的实用价值。36732
毕业论文关键词：PM2.5；STM32微控制器；灰尘传感器；DHT11温湿度传感器；LCD12864
Designof PM2.5 tester based on the STM32
Abstract: Because of the deterioration of air quality, haze weather phenomenon appears, and damage phenomenon appears. In many parts of China, haze weather phenomenon are brought into fog as a severe weather warning forecast, collectively known as "fog haze weather". Due to "haze weather" harmful to human body health, therefore, early warning and forecasting the weather becomes more and more important, in order to facilitate people to take preventive measures, this design can play the role of early warning forecast. This design uses STM32 microcontroller as the control core, PM2.5 concentrations measured by the GP2Y1010AU0F dust sensor, temperature and humidity of the surrounding environment measured by the DHT11 temperature and humidity sensor, and the LCD12864 display shows the current PM2.5 density, air quality levels and temperature and humidity values. When the concentration of PM2.5 to set limit to start audible and visual alarm.
KeyWords: PM2.5; STM32 microcontroller; dust sensor; DHT11 temperature and humidity sensor; LCD12864
目 录
前 言 3
1 基于STM32的PM2.5检查仪设计背景 4
2 基于STM32的PM2.5检查仪设计意义 5
2.1 基于STM32的PM2.5检查仪的研究对市场的意义 5
2.2 基于STM32的PM2.5检查仪的研究对求职的意义 6
2.3 基于STM32的PM2.5检查仪的研究对学习的意义 6
3 基于STM32的PM2.5检查仪系统描述 6
3.1 综述 6
3.2 系统框图 6
4 基于STM32的PM2.5检查仪硬件设计 7
4.1 硬件部分总述 7
4.2 STM32微控制器 8
4.3 温湿度采集电路 13
4.3.1 DHT11传感器介绍 13
4.3.2 DHT11传感器特性 13
4.3.3 DHT11传感器技术参数 14
4.3.4 DHT11传感器原理图 14
4.4 电源管理电路 14
4.4.1 AMS1117芯片介绍 15
4.4.2 AMS1117内部框图 15
4.4.3 AMS1117芯片特点 15
4.4.4 AMS1117电源稳压电路 15
4.5人机交换电路 16
4.5.1 12864液晶屏介绍 16
4.5.2 12864液晶屏特点 16
4.5.3 12864原理图 17
4.6 通讯电路 17
4.7 PM2.5检测电路 17
4.7.1 GP2Y1010AU0F 粉尘传感器介绍 17
4.7.2 GP2Y1010AU0F 粉尘传感器的性能特点 18
4.7.2 内部原理图 18
4.7.3 灰尘传感器原理图 19
4.8 报警电路 19
4.8.1 报警电路原理图 19 基于STM32的PM2.5检查仪设计+电路图+程序代码:http://www.youerw.com/zidonghua/lunwen_35296.html