【正文】 2021 級課程設計 鍋爐自動給水系統(tǒng) 1 前 言 本文主要設計了一種 基于單片機的 鍋爐 自動給水系統(tǒng) ， 本系統(tǒng)以 8位單片機 STC89C52RC作為系統(tǒng)控制處理器，采用液位上下限傳感器和 DS18B20采集信息，采用數(shù)碼管和 LCM作為顯示設備，采用 WT588D語音警示及報溫。系統(tǒng) 具有液位 和溫度自動 檢測 、 報警和控制 等 功能 。 本系統(tǒng)在設計中主要 由液 位檢測、溫度檢測、按鍵控制、 液 位控制、 溫度 控制、顯示部分、故障報警等幾部分組成來實現(xiàn) 液位和溫度 控制。用 液 位傳感器檢測 液 位，用 DS18B20溫度傳感器來檢測 液 溫，用 二 個控制按鍵來實現(xiàn)按健控制，用 四 位 7 段 LED 顯示器 和LCM128*64來完成顯示部分，用 繼電器 來控制 水 泵的 啟停 。本設計用單片機控制易于實現(xiàn)鍋爐液位、溫度 控制 而且有 成本 低、程序易于調試、一部分出現(xiàn)故障不會影響其他部分的工作、維修方便等優(yōu)點。 關鍵詞： STC89C52單片機 。 液位控制 。 溫度控制 。報警 2021 級課程設計 鍋爐自動給水系統(tǒng) 2 PREFACE In modern society, with the development of industry, the residents living area of the centralized heat supply demand is also growing, steam boiler capacity continues to increase, the operation process requirements more stringent, the boiler liquid level control of a direct impact on people and equipment safety. Low level may make the boiler phenomenon of dry bustion, liquid level is too high will make the boiler steam pressure is too high, danger, the traditional liquid level control cannot remote centralized control, low degree of automation, precision shortings, and by manual operation has been unable to adapt to, control system and the necessity of reform unceasingly along with the science and technology progress of controlled object, more and more plex, people on the requirements of control precision improvement. As a result of the controlled object and the process is nonlinear, timevarying, strong coupling between different parameters, random noise and other factors, makes an accurate mathematical model of object creation bees difficult. In front of these plex systems, the traditional control methods can not meet the control accuracy, and poor stability of the system. Better to boiler automatic control with singlechip microputer technology, at the same time, the rapid development of automatic control technology, SCM and its peripheral chip to realize boiler liquid level control is possible, but also bee a development trend, single chip not only has small volume, convenient installation, function relatively plete advantages, but also have the very high price ratio, thus wide application prospect, and contribute to the discovery of a possible failure, fire water supply system and realized by microputer automatic control and regulation, will ensure the normal supply of water supply boiler, to maintain the stability of system, guarantee the safe and economic operation. This paper is to use single chip is a pot which has high practical value and superiorit. KEYWORDS： Single chip puter。 peripheral chip。 the boiler level control。 automatic control and regulation to ensure the safe and economic operation 2021 級課程設計 鍋爐自動給水系統(tǒng) 3 目 錄 1 緒論 ........................................................................................................................ 4 研究背景和意義 ............................................................................................... 4 設計方案 ........................................................................................................... 4 2 系統(tǒng)硬件設計 .........................................................................................................5 液位傳感器的介紹 ........................................................................................... 5 溫度傳感器的選擇 ........................................................................................... 5 顯示電路的設計 .............................................................................................. 6 ........................................................................................................ 6 ............................................................................................................... 8 ....................................................................................................... 8 ...................................................................