"基于51单片机红外迎宾系统研究与设计"

Infrared induction doorbells are widely used in shop entrances to welcome customers, responding differently based on the presence or absence of customers. This study focuses on the application of infrared induction technology in our daily lives, specifically in the form of doorbells. Through research, understanding of the principles of infrared proximity switches, circuit design and production processes, as well as the application of common components have been gained. The designed circuit achieves the desired functionality, with the speaker greeting immediately when a person enters and providing a different greeting when exiting. In addition to the basic functionality, a clock and DS18B20 temperature sensor have been integrated to display real-time time and temperature, and an alert is sent to the store manager through the SIM800C module when the store becomes overcrowded. Key components include the infrared proximity switch, WT588 voice module, and the infrared induction doorbell system.