基于PLC的太陽(yáng)能熱水器自動(dòng)控制系統(tǒng)的設(shè)計(jì)


摘  要
本課題研究了可編程控制器（PLC）在太陽(yáng)能熱水器自動(dòng)控制系統(tǒng)中的應(yīng)用。重點(diǎn)研究了系統(tǒng)的硬件構(gòu)成及系統(tǒng)軟件的設(shè)計(jì)過(guò)程。指出了 PLC 設(shè)計(jì)的關(guān)鍵主要是能滿足基本控制功能, 并考慮維護(hù)的方便性、系統(tǒng)可擴(kuò)展性等。在本文中經(jīng)研究確定出了系統(tǒng)的各個(gè)工序，繪制了系統(tǒng)的工藝流程圖；進(jìn)行了系統(tǒng)的I/O分配和PLC的選型；根據(jù)系統(tǒng)設(shè)計(jì)要求設(shè)計(jì)繪制了系統(tǒng)的控制梯形圖；繪制出了控制系統(tǒng)電氣原理圖和接線圖等。
通過(guò)用PLC對(duì)太陽(yáng)能熱水器自動(dòng)控制系統(tǒng)的改造，大大減少了系統(tǒng)對(duì)其它元器件的使用，使系統(tǒng)接線簡(jiǎn)單、檢修維護(hù)方便快捷、可靠性提高，增進(jìn)了系統(tǒng)的先進(jìn)性。
關(guān)鍵詞: PLC；太陽(yáng)能；自動(dòng)控制系統(tǒng)；熱水器

Design of Solar Water Heater
Automatic Control System Based on PLC
Abstract 
Application of PLC in solar water heater automatic control system is researched in this paper. The content of this paper on the process of system hardware constitution and the system software design is emphasized . And the key of PLC design that is to satisfy the basic control function is pointed out , meanwhile maintenance convenience and system extension are also considerated. The content of this paper is divided into four parts. In the first part, the procedure of the system is established, and then the treatment flow chart is    drawed out; In the second part, The address of I/O is resigned .and the suitable PLC type is choosed. The third part, the control ladder diagram is designed according to the requirement; In the end, the electrical principle diagram and the interconnection diagram are drawn.
Through the design of the solar water heater automatic control system, the components that is used in the solar water heater automatic control system are decreased. The performance of the system is lifted, and it has the feature such as simply interconnection, rapid and easy fault detecting and maintenance, and high reliability. In a word, the system becomes more advanced because of my design.
Keywords: PLC; solar; automatic control system; water heater

 
目     錄
摘  要 I
Abstract II
第一章 緒 論 1
1.1 本課題研究的目的、意義 1
1.2國(guó)內(nèi)外研究現(xiàn)狀 1
1.2.1 國(guó)內(nèi)研究現(xiàn)狀 1
1.2.2 國(guó)外研究現(xiàn)狀 2
1.3 目前我國(guó)太陽(yáng)能熱水器的種類 2
1.3.1 平板式太陽(yáng)熱水器 2
1.3.2 全玻璃真空管式熱水器 3
1.3.3 熱管式太陽(yáng)能熱水器 4
1.3.4 熱管—真空管式太陽(yáng)能熱水器 4
1.4 研究的內(nèi)容 5
第二章 全玻璃真空管式太陽(yáng)能熱水器的綜述 6
2.1 太陽(yáng)能熱水器系統(tǒng)功能簡(jiǎn)介 6
2.1.1 太陽(yáng)能熱水器組成、原理和工作過(guò)程 7
2.1.2 太陽(yáng)能熱水器各單元介紹 8
2.1.3 系統(tǒng)的要求 10
2.2 可編程控制器（PLC）簡(jiǎn)介 10
2.2.1 PLC的發(fā)展歷史 11
2.2.2 可編程序控制器的工作原理 11
2.2.3 可編程控制器的的特點(diǎn) 12
2.2.4 PLC的分類 13
2.2.5 可編程控制器應(yīng)用領(lǐng)域 14
第三章 熱水器控制系統(tǒng)的設(shè)計(jì)方案 16
3.1 系統(tǒng)硬件的設(shè)計(jì)方案 16
3.1.1 PLC的選型 16
3.1.2 PLC硬件控制框圖 17
 
3.1.3 各單元功能作用介紹 17
3.1.4 PLC的端口分配 21
 
3.1.5 系統(tǒng)電路的設(shè)計(jì) 22
3.2 系統(tǒng)軟件設(shè)計(jì)方案 24
3.2.1 軟件組成 25
3.2.2 系統(tǒng)控制流程圖 25
3.2.3 設(shè)計(jì)PLC控制原理（梯形圖程序） 30
第四章 可編程控制器（PLC）的安裝、維護(hù)和檢修 31
4.1 PLC的安裝 31
4.2 PLC系統(tǒng)的電源接線 31
4.3 接地 32
4.4 輸入接線 32
4.5 輸出接線 32
4.6 PLC的維護(hù)和檢修 33
第五章 結(jié)  論 34
參考文獻(xiàn) 35
致    謝 36
附錄Ⅰ 梯形圖 37
附錄Ⅱ 指令表 40