数字温度计设计.doc

目录
摘要 2
Abstract 2
绪论 3
第1章任务与要求 3
3
任务与要求 3
设计任务及指标 4
第2章智能温度传感器与单片机 9
智能温度传感器的产品分类 9
智能温度传感器典型产品的技术指标 9
单片机AT89C2051的简介 10
单片机AT89C2051的引脚图 11
第3章 DS18B20数字温度计 11
DS18B20温度传感器的性能特点 11
DS18B20温度传感器的内部结构框图及设置 11
DS18B20温度传感器与单片机的接口电路 14
第4章数字温度计的设计 15
总体设计方案 15
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第5章硬件 22
系统硬件主要构成 22
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总结 22
参考文献 23
附录 23
摘要
温度作为一个常用的物理量在我们的气场生活中起着十分重要的作用,所以对温度计的设计也十分必要。在此介绍一种智能数字温度计,这种温度计有许多优点,并且它的应用范围非常广泛。它的主要元件是:控制器—AT89C2051、温度传感器—DS18B20、数码管—LED,所以这种温度计不仅设计起来简单并且轻便、便宜,总体来说这种温度计的性价比是很高的。它的主要原理是利用DS18B20可以很好的转换温度值,并且直接显示温度值,它的性能优于传统的感温元件并且省去了A\D、和模拟开关的设计。此外AT89C2051体积小并且还可以直接驱动LED,这样大大化简了设计的难度并且降低了成本。
【关键词】智能数字温度计温度
Abstract
The temperature took monly used physical quantity is playing the extremely vital role in ours gas field life, therefore extremely is also essential to the thermometer this introduced one kind of intelligent numeral thermometer, this kind of thermometer has many merits, and its application scope is extremely key element is: Controller - AT89C2051, temperature sensor - DS18B20, nixietube - LED ,not only therefore this kind of thermometer designs simple and is facile, is cheap, generally speaking this kind of thermometer performance-to-price ratio is very main principle is uses DS18B20 to be possible the very good transformation temperature value, and demonstrates the temperature value directly, and its performance surpassed traditional the bulb to omit A \ D, and the analog switch in addition at89C2051 volume small also may direct drive LED, and simplified the design difficulty to reduce the cost like this greatly.
[Key word] Intelligence Numeral Thermometer Temperature
前言
单片机自问世以来,性能不断提高和完善