太陽(yáng)能熱水器中央控制器的設(shè)計(jì)與實(shí)現(xiàn)

電子機(jī)電論文編號(hào):JD938   論文字?jǐn)?shù):16974,頁(yè)數(shù):47

目  錄
摘要
Abstract
第1章 緒論………………………………………………………………1
  1.1 目前太陽(yáng)能熱水器的研發(fā)面臨的問(wèn)題……………………………1
第二章 系統(tǒng)總體設(shè)計(jì)方案………………………………………………2
  2.1 系統(tǒng)任務(wù)和功能……………………………………………………2
  2.2 AT89C51功能和特點(diǎn)………………………………………………3
  2.3 通用四運(yùn)算放大器 LM324…………………………………………5
     2.3.1 LM324作反相交流放大器……………………………………6
     2.3.2 LM324作測(cè)溫電路……………………………………………6
  2.4 DS18B20 數(shù)字式溫度傳感器………………………………………7
 2.4.1 DS18B20與單片機(jī)的典型接口設(shè)計(jì)…………………………8
  2.5 鎖存器 LM373……………………………………………………10
  2.6 I/O接口電路8255A……………………………………………11
第三章 太陽(yáng)能熱水器中央控制器的硬件設(shè)計(jì)…………………………14
  3.1 前端的模擬電路設(shè)計(jì)……………………………………………14
     3.1.1 溫度傳感器的選用…………………………………………16
     3.1.2 DS18B20與單片機(jī)的典型接口……………………………16
  3.2 8255A與單片機(jī)的典型接口設(shè)計(jì)………………………………17
     3.2.1 ADC0809與89C51單片機(jī)的接口設(shè)計(jì)……………………17
  3.3 鍵盤(pán)和顯示器接口設(shè)計(jì)…………………………………………18
     3.3.1 鍵盤(pán)工作原理………………………………………………18
     3.3.2 LED顯示器工作原理………………………………………20
     3.3.3 接口芯片的選擇及其原理…………………………………20
 3.4 單片機(jī)復(fù)位電路的設(shè)計(jì)…………………………………………22
 3.5 單片機(jī)時(shí)鐘電路的設(shè)計(jì)…………………………………………24
  3.6 系統(tǒng)原理綜述……………………………………………………25
第四章 太陽(yáng)能熱水器中央控制器的軟件設(shè)計(jì)…………………………27
  4.1 系統(tǒng)總體軟件設(shè)計(jì)………………………………………………27
  4.2 數(shù)據(jù)采集軟件設(shè)計(jì)………………………………………………27
     4.2.1 中斷服務(wù)子程序…………………………………………27
     4.2.2 水位檢測(cè)子程序…………………………………………29
  4.3 顯示和鍵盤(pán)軟件設(shè)計(jì)…………………………………………30
 4.3.1 動(dòng)態(tài)顯示子程序設(shè)計(jì)……………………………………30
 4.3.2 鍵盤(pán)子程序設(shè)計(jì)………………………………………32
第五章 抗干擾技術(shù)設(shè)計(jì)………………………………………………34
  5.1 主要抗干擾技術(shù)………………………………………………34
  5.2 提高系統(tǒng)抗干擾能力的主要方法……………………………34
第六章 結(jié)論……………………………………………………………37
參考文獻(xiàn)
附錄
致謝

摘 要
 當(dāng)今計(jì)算機(jī)技術(shù)在飛速發(fā)展，微機(jī)應(yīng)用日益普及深入，微機(jī)在通信自動(dòng)化、工業(yè)自動(dòng)控制、電子測(cè)量、信息管理和信息系統(tǒng)等方面得到廣泛的應(yīng)用。嵌入式計(jì)算機(jī)系統(tǒng)是以應(yīng)用為中心，以計(jì)算機(jī)技術(shù)為基礎(chǔ)，軟、硬件可裁剪，適應(yīng)應(yīng)用系統(tǒng)對(duì)功能，可靠性，成本，體積，功效等嚴(yán)格要求的專(zhuān)業(yè)計(jì)算機(jī)系統(tǒng)。其最初應(yīng)用是基于單片機(jī)的。單片機(jī)小巧靈活，成本低，易于產(chǎn)品化。它面向控制，能針對(duì)性的解決從簡(jiǎn)單到復(fù)雜的各種控制任務(wù)。
 目前，國(guó)內(nèi)的太陽(yáng)能熱水器還處于研發(fā)階段，這種控制器只具有溫度和水位的顯示功能，不具有溫度控制功能。由于加熱時(shí)間不能控制而導(dǎo)致過(guò)燒，從而浪費(fèi)大量電能。本設(shè)計(jì)是以89c51單片機(jī)為檢測(cè)控制中心，采用ds12887實(shí)時(shí)時(shí)鐘，實(shí)現(xiàn)了溫度，水位，時(shí)間三種參數(shù)的實(shí)時(shí)顯示功能。
 關(guān)鍵詞：?jiǎn)纹瑱C(jī)；太陽(yáng)能熱水器；智能控制；水位；溫度；時(shí)間；                                                       

Abstract
 Now the computer technology in the swift development, the microcomputer application day by day popularizes thoroughly, the microcomputer in aspects and so on correspondence automation, industry automatic control, electronic surveying, information management and information system obtains the widespread application. The embedded computer system is take the application as a center, take the computer technology as the foundation, the software and hardware may cut out, adaptation application system to function, reliability, cost, volume, effect and so on strict request specialized computer system. It application is at first based on the monolithic integrated circuit. Monolithic integrated circuit exquisite nimble, the cost is low, easy production. It faces the control, can the pointed solution from the simplicity to complex each kind of control duty. present, the domestic solar-powered water heater is also at the research and development stage, this kind of controller only has the temperature and the water level demonstration function, does not have the temperature control function. Because the heating-up time cannot control causes the overroasting, thus wastes the massive electrical energies. This design is take the 89c51 monolithic integrated circuit as the examination control center, uses the ds12887 real-time clock, has realized the temperature, the water level, the time three kind of parameter real time display functions.
 key word: Monolithic integrated circuit; Solar-powered water heater; Intelligent control; Water level; Temperature; Time;