基于单片机控制红外报警系统设计研究

s proposing a new requirement for theft prevention measures. This design is specifically aimed at meeting the demand for preventing robbery, theft, and other unexpected incidents in orchards. Currently, there are various types of alarm systems on the market, such as pressure-triggered alarms, switch electronic alarms, and pressure-shading triggered alarms. However, these commonly used alarms have some disadvantages. This system uses a pyroelectric infrared sensor, which is simple to manufacture, low cost, and easy to install. It has stable anti-theft performance, strong anti-interference ability, high sensitivity, and is safe and reliable. This type of alarm system is installed covertly and is not easily detected by thieves. Furthermore, the signal of the alarm system can be processed by a monolithic integrated circuit system and conveniently communicated with a PC, making it easy for multiple users to manage. This design mainly includes hardware and software design. The hardware part consists of a monolithic integrated circuit control circuit, an infrared sensor circuit, a driving and alarm circuit, and an LED control circuit, among others. The processor uses the 51 series monolithic integrated circuit AT89S51. The entire system operates under the control of system software. The software part can be divided into several modules, including data acquisition, keyboard control, alarm, and display sub-functions. Keywords: monolithic integrated circuit, infrared sensor, data acquisition, alarm circuit.