毕业设计（论文）-基于单片机的温度控制系统设计.docVIP

摘 要 本系统以单片机为核心，采用热电偶和DS18B20分别对高温大范围、低温小范围进行温度的测量，通过控制晶闸管的通断进而控制加热丝的加热，另外，能使加热丝保持在所设定的温度，温度值大概是从0到1000℃。整个测温或者是加热过程中的温度值通过四个数码管实时显示。 单片机采用的是ATMEL公司的 AT89C51是一种高效微控制器T89C系列的单片机为很多嵌入式控制系统提供了一种灵活性高且价廉的方案。Abstract The core of the system is single-chip microcomputer, both thermocouple and DS18B20 can used to measur temperature ,but the former used in a wide range of high-temperature,the latter used in a small-scale of low-temperature,by controlling the thyristor to control the electric wire,and can keep it in a set temperature,which is prlbably the degrees from 0 to 1000℃. Throughout the temperature or the temperature of the heating value of the process through four real-time digital tube to display. Single-chip microcomputer is the AT89C51 which made by ATMEL Corporation, the AT89C51 is a highly efficient microcontroller,AT89C series of single-chip embedded control system provide for many flexible and inexpensive programs.the low-voltage single from thermocouple pass through amplification and special compensation circuitry,then it can be used to generate the analog signal, AD converter is used by TLC1543, this analog-to-digital converter chip has many features,such as 10-bit high-resolution,fastly and easily connect to MCU.and it used to transform analog signal into digital signal which is sent to microcontroller,after a single-chip analysis,comparison and processing,then output, one of which is shown in the digital tube,the other is to control the thyristor turn-off to determine whether the electric wire should be heated.At this point thermocouple used to measure temperature and finally the value of the temperture is sent to single-chip by means of digital signal,and then through a series of single-chip processing, the output control electric heating wire,in order to make electric wire achieve constant temperature. Keyword: Temperature Acquisition； Signal finishing；single chip； Single-chip Temperature control 目 录 第一章：引言 1 1.1温度控制系统的发展概况 1 1.2温度控制系统的意义 1 1.3本文要做的工作 2