"基于RS-485通信的温度检测仪软件设计与验证研究"

temperature is one of the most common parameters in industrial production and automatic control. The production process requires temperature detection and control. In order to meet the requirements of temperature acquisition and measurement, this system adopts an AT89S52-based 8-channel temperature detection system that can detect temperatures at multiple points and display numerical values with RS-485 communication functionality. The system includes modules for temperature acquisition, microcontroller control, AD conversion, temperature display, and RS-485 communication. It mainly uses the Pt100 thermistor temperature sensor for temperature detection, and converts the acquired values through AD conversion, then displays the temperature on the LCD screen, and sets upper and lower temperature thresholds for temperature alarm functionality. The thesis first briefly introduces the basic principles and overall structure of the system, then elaborates on the entire system in terms of hardware and software, with detailed description of the software part. Finally, the thesis discusses the system debugging and analysis, verifying the system's functions. Keywords: AT89S52, RS-485, AD conversion, PT100 temperature sensor.