基于单片机的PWM控制方法的精密温度控制-毕业设计

毕 业 论 文（设 计） 中文题目：基于单片机的 PWM 控制方法的精密温度控制 系统设计 英文题目：Design of P recise T emperature C ontrol S ystem B ased on PWM C ontrol M ethod of M icroprocessor 姓 名: 姚佑鹏 学 号: 090701224 专业班级: 09 电气工程及其自动化 2 班 指导老师: 李卫平 提交日期: 2025-05-15 惠州学院 HUIZHOU UNIVERSITY教务处制 摘 要本文设计了一种以单片机 STC89C52 为核心的精密温度控制系统。它使用一线制数字温度传感器 DS18B20 采集温度，并通过四位数码管显示实时温度。通过设置按键，设定恒温运行时的温度值，并显示在数码管上。单片机采纳 PID 控制算法对测量值和设定值进行处理，计算输出 PWM 波控制继电器调节发热电路的发热功率，最终控制被控对象温度。通过原理分析，软硬件设计及实验调试，温度能够实时检测和自动控制，系统的温度控制精度可达到±0.5℃，表明该温度系统比较稳定并且精确，能够实现对温度的精密控制。关键词：温度控制 MCS-52 DS18B20 PID PWM Abstract A precise temperature control system with the core of microprocessor STC89C52 is designed in this paper. In this system, one-wire digital thermometer DS18B20 is used to transform analog temperature signal to digital signal,through four real-time digital of a digital thermometer temperature.by setting the button,set the thermostat temperature at the time of operation, and digital display of the temperature.Single-chip Microcomputer used PID control algorithm to process the data measurement and data settings,and calculate the PWM signal, is outputted and magnified to drive a solid state relay so that the power of heat circuit is adjusted.Thus the temperature of the object can be control. Through many of theory, design and experiments, the temperature of real-time detection and automatic control test is reached,and the error of this system is ±0.2. It show that the℃ system is precise and steady, and control precise temperature.Keywor...