Abstract
This paper mainly discusses the invasion of the signal for which sound and light alarm and the current environment temperature and humidity of real-time monitoring and display, for this design the passive infrared alarm monitor system, to STC89C52 microcontroller as the main computing and control components, use of pyroelectric infrared sensor for human invasion of information, when monitoring function open and someone invasion, driving a buzzer alarm, LED alarm light, realize the infrared alarm. Use DHT11 temperature and humidity sensor realize temperature and humidity measurement shows that the system through the DS1302 clock circuit get and display the current time, so as to achieve real-time environmental data collection, the store and display, simple, practical, and strong anti-interference ability, high sensitivity, safe, reliable, and has a high application value.
