摘要：随着我国经济的发展，人民生活水平的提高，人们对环境问题及健康问题日益重视，空气质量状况受到越来越多的关注。人的一生时时刻刻都要呼吸空气，因此在空气质量堪忧的环境下雾霾检测系统具有非常重要的作用。本文设计的雾霾检测系统是以空气中可吸入颗粒物（粉尘）的检测监控为背景，设计了超低功耗的雾霾检测仪，它以单片机STC89C52为控制核心，由ADC0832转换芯片采集GP2Y1010AU粉尘传感器的粉尘的浓度，通过单片机的数据转换处理后在液晶屏上显示空气中的质量。当实时检测到的粉尘浓度超过设定的报警值时，蜂鸣器和发光二极管就会发出声光报警。当然，粉尘的浓度报警值可以通过按键来进行设置。本文设计的基于单片机的雾霾检测仪体积小，功耗低，操作简单，适用于测量精度要求不高的场合，能够实时知道空气中粉尘浓度，做好预防措施。95096

毕业论文关键词：STC89C52，雾霾,传感器,检测

Abstract: With the development of our national economy and improvement of people’s living standard ,awareness of environmental issues and health problems increasing emphasis on air quality conditions have been paid more attention to 。People's life always have to breathe the air, so in the air quality of the environment under the haze detection system has a very important role。In this paper,haze detection system is based on the air of inhalable particulate matter (dust) inspection，the haze detector of ultra low power design, it takes STC89C52 as control core, collects dust concentration of gp2y1010au dust sensor by adc0832 conversion chip, and displays the quality of air on LCD after data conversion of MCU。When the dust concentration detected in real time exceeds the set alarm value , the buzzer and the light-emitting diode will emit an audible and audible alarm。 Of course, the dust concentration alarm value can be set by pressing the key。In this paper,the design of the MCU based fog detector small size,low power consumption,simple operation,suitable for the measurement accuracy is not high enough to be able to know in real time the concentration of dust in the air,do a good job of preventive measures。

Keywords: STC89C52, fog and haze, sensor, detection

目录

1 绪论 4

1。1 引言 4

1。2 选题背景 4

2 雾霾检测仪系统设计方案 5

2。1 系统的功能和技术指标 5

2。2 系统工作原理 5

2。3 程序框图设计 6

3 雾霾检测仪系统硬件设计 7

3。1 单片机部分 7

3。1。1 系统CPU 器件选择 7

3。1。2 单片机最小系统复位、晶振电路简介 9

3。2 粉尘传感器检测电路 10

3。2。1 传感器简介和粉尘采集原理 10

3。2。2 粉尘采集的A/D转换 12

3。3 液晶显示电路 13

3。4 声光报警提示电路 14

3。5 按键电路 15

4。 雾霾检测仪系统软件设计 16

4。1 主程序流程图 16

4。2 传感器数值处理程序流程图