PID温度控制(论文最终).doc

哈尔滨工业大学华德应用技术学院毕业设计（论文） PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT 1 摘 要 本文主要从硬件和软件两方面介绍了MCS-51单片机温度控制系统的设计思路，简单说明如何实现对温度的控制，并对硬件原理图和程序框图作了简洁的描述。还介绍了在单片机温度控制系统的软硬件设计中的一些主要技术关键环节,该系统主要以51系列单片机为核心,由温度检测电路,模/数转换电路, 电桥转换电路, 报警与指示电路, 功率放大电路等构成。 但用51系列单片机设计的温度检测电路是本次设计的主要内容，是整个单片机温度控制系统设计中不可缺少的一部分，该系统对温度进行了实时采集与检测。本设计介绍的单片机温度自动控制系统的主要内容包括：系统方案、元器件选择、系统理论分析、硬件设计、软件设计、系统调试及主要技术性能参数。 关键词：单片机；温度传感器；温度检测；温度控制；PID算法 Abstract The design of single-chip’s temperature control system is introduced from hardware and software, and simply explains how to actualize the temperature control. The hardware principle and software case fig are described. Some important techniques in a design scheme of the hardware and the software of the temperature control by single-chip microcomputer are introduced. The system mostly takes 8031 single-chip microcomputer as core, it is structured by temperature testing circuit, A/D switch circuit, zero passage testing circuit, warning and indication circuit, optical-electrical isolation and power amplifier circuit and so on. The main content of this design is temperature testing circuit that uses AT89C51 single-chip microcomputer .It is a part of the whole design that cannot be lacked. The system is used to collect and control temperature in real time. The temperature automatic control system based on single-chip microcomputer is described in the article including system scheme，parts of an apparatus choice, theoretical analysis，the design of hardware and software, system testing，and the main technical performance parameters． Key Words：Single—Chip Microcomputer；Temperature sensor；Temperature collecting；Temperature controlling；PID algorithm. 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc31549 摘 要 PAGEREF _Toc31549 I HYPERLINK \l _Toc25131 Abstract PAGEREF _Toc25131 II HYPERLINK \l _Toc1850 第1章 绪论 PAGEREF _Toc1850 1 HYPERLINK \l _Toc19253 1．1 课题的背景与意义 PAGEREF _Toc19253 1 HYPERLINK \l _Toc25537 1．3 课题举例简介 P