基于单片机热敏电阻测温设计论文.docx

摘 要 随着社会的进步和工业技术的发展，人们越来越重视温度对产品的影响，许多产品对温度范围要求严格，目前市场上普遍存在的问题有温度信息传递不及时、精度不够的缺点，不利于工业控制者根据温度变化及时做出决定。在这样的形式下，开发一种实时性高、精度高的温度采集系统就很有必要。 本课题用一种基于单片机的数据采集系统方案，该方案根据热敏电阻随温度变化而变化的特性，采用串联分压电路。单片机采集热敏电阻的电压，通过A/D转换将模拟量电压信号转换成数字量电压信号，经过查表转换得到温度值，控制数码管实时显示温度值。本系统中所用到的器件是STC12C5A60S2单片机、NTC热敏电阻和数码管。 关键词：温度控制器 SC12C5A60S2单片机 A/D转换  ABSTRACT With the social progress and development of industrial technology, more and more attention to the impact of temperature on the products, many products on the critical temperature range, temperature information transmission is not timely, not enough precision shortcomings of a common problem on the market today, do notconducive to industrial control based on temperature changes and make timely decisions. In this form, to develop a real-time, high precision temperature acquisition system is necessary. This topic with a microcontroller-based data acquisition system program, which according to the characteristics of the thermistor varies with temperature changes, the series voltage divider circuit. The microcontroller collection thermistor voltage, the analog voltage signal by the A / D converter to convert the voltage signal of the digital conversion temperature control digital tube temperature value is displayed in real time after the look-up table. The devices used in this system is STC12C5A60S2 microcontroller, NTC thermistor and digital tube. Keywords: Temperature controller; SC12C5A60S2 microcontroller; A / D converter;  TOC \o 1-3 \h \u  HYPERLINK \l _Toc10966 摘 要  PAGEREF _Toc10966 2  HYPERLINK \l _Toc22531 ABSTRACT  PAGEREF _Toc22531 3  HYPERLINK \l _Toc28850 1 绪论  PAGEREF _Toc28850 5  HYPERLINK \l _Toc9010 1.1 研究温度控制系统的背景、目的及意义  PAGEREF _Toc9010 5  HYPERLINK \l _Toc15988 1.2 设计的主要内容及技术指标  PAGEREF _Toc15988 5  HYPERLINK \l _Toc6937 1.3 数据采集系统简单介绍  PAGEREF _Toc6937 6  HYPERLINK \l _Toc26075 2 温度控制系统总体设计  PAGEREF _Toc26075 7  HYPERLINK \l _Toc24497