摘要温度试验箱作为工农业生产的常用加热设备仪器，其温度偏差的大小对于精度要求严格的场合是至关重要的。针对传统温度试验箱不能较快上升到设定的温度值，且最终实际温度值与原始设定温度之间的偏差值较大，设计了由热电偶温度检测电路、信号处理电路、温度信号采集电路、转换电路以及PC端控制算法程序构成的温度实验箱智能控制系统。PC端控制是由组态王PID控制算法与模糊PID控制算法实现的，该算法能够实现对信号测试系统的准确控制，大幅减小超调，在控制精度以及响应速度方面性能优越。基于热电偶的测温方法易于信号传输与变换，且测温范围宽。实验表明，本温度控制系统能够准确稳定运行、设计合理、精度达到要求。 42355

毕业论文关键词  热电偶  PID算法  模糊PID算法  组态王    

毕业设计说明书外文摘要

Title    Design of Intelligent System for Temperature Test Chamber                     

Abstract

Temperature test chamber is used as a common heating equipment for industrial 

and agricultural production. The size of the temperature deviation is vital important for precise requirements of the occasion. In view of the traditional temperature test chamber cannot quickly rise to the set temperature value, and the deviation between the value of the final actual temperature value and original set temperature is large, then we design the intelligent control system of temperature experiment chamber consist of thermocouple temperature detection circuit, signal processing circuit, temperature signal acquisition circuit, change-over circuit and PC side control algorithm. The PC terminal is achieved by kingview PID control algorithm and fuzzy PID control algorithm. These algorithms can realize accurate control of signal test system and significantly reduce the overshoot in control precision and the speed of response. Based on thermocouple temperature measurement method is easy to transmit and transform the signal, besides, the measuring rage is wider. Experimental results show that the temperature control system can accurately and stably run, the design is reasonable, the accuracy can attain the requirements.

Keywords  thermocouple  PID algorithm  fuzzy PID algorithm  Kingview  

目   次

1  引言 1

1.1  课题研究背景及意义 1

1.2  设计内容 1

2  硬件电路设计 4

2.1  单片机最小系统 5

2.2  热电偶测温电路 7

2.3  数据采集电路 8

2.4  串口转换电路 9

2.5  控制电路 10

2.6  显示模块电路 12

3  软件设计与调试 14

3.1  主程序流程图 14

3.2  单片机程序设计 14

3.2.1  单片机程序模块 14

3.2.2  通信模块 15

3.3  程序算法介绍 17

3.3.1  PID算法介绍 17

3.3.2  模糊控制算法介绍 19

3.4   PID算法设计