《单片机智能空气品质监测仪设计与实现》

With the rapid development of China's economy and the improvement of people's living standards, environmental and health issues have become increasingly important. Indoor air quality (IAQ) has attracted more and more attention as people spend two-thirds of their lives indoors. The portable intelligent air quality monitor designed in this paper is based on the monitoring and control of toxic and harmful gases in indoor air. It uses the STC90C51, an 8-bit ultra-low power single-chip microcontroller from STC company, as the control core to achieve real-time collection, processing, display, and alarm functions for indoor temperature, humidity, and VOC gas. The device is powered by a lithium battery, which makes it portable and versatile. It uses a LCD1602 dot matrix LCD screen to display menus and has a user-friendly interface. A sound and light alarm system is also designed to provide timely alerts when the parameters exceed the standard. The intelligent air quality monitor is small in size, low in power consumption, easy to operate, and suitable for applications in home and community healthcare, allowing users to know the quality of indoor air in real time. Keywords: STC90C51, indoor air quality, LCD display, temperature and humidity, VOC gas.