【正文】 畢業(yè)設(shè)計(jì)（論文）報(bào)告紙 I┊┊┊┊┊┊┊┊┊┊┊┊┊裝┊┊┊┊┊訂┊┊┊┊┊線┊┊┊┊┊┊┊┊┊┊┊┊┊畢 業(yè) 論 文課 題 名 稱(chēng) 十字路口交通信號(hào)燈控制分 院/專(zhuān) 業(yè) 班 級(jí)學(xué) 號(hào)學(xué) 生 姓 名指導(dǎo)教師： 2022 年 5 月 31 日畢業(yè)設(shè)計(jì)（論文）報(bào)告紙 II┊┊┊┊┊┊┊┊┊┊┊┊┊裝┊┊┊┊┊訂┊┊┊┊┊線┊┊┊┊┊┊┊┊┊┊┊┊┊摘 要自從交通燈誕生以來(lái)，其內(nèi)部的電路控制系統(tǒng)就不斷的被改進(jìn)。設(shè)計(jì)方法也開(kāi)始多種多樣，從而使交通燈顯得更加智能化。作為交通控制的重要組成部份的交通信號(hào)燈也應(yīng)適合社會(huì)實(shí)際情況。這是選擇制作十字路口交通燈的目的。可編程控制器(PLC)以微處理器為核心，普遍采用依據(jù)繼電接觸器控制系統(tǒng)電氣原理圖編制的梯形圖語(yǔ)言進(jìn)行程序設(shè)計(jì)，編程容易，功能擴(kuò)展方便，修改靈活,而且結(jié)構(gòu)簡(jiǎn)單，抗干擾能力強(qiáng)。西門(mén)子可編程控制器指令豐富，可以接各種輸出、輸入擴(kuò)充設(shè)備，有豐富的特殊擴(kuò)展設(shè)備，其中的模擬輸入設(shè)備和通信設(shè)備更是符合交通燈控制系統(tǒng)的要求與特點(diǎn)，能夠方便地聯(lián)網(wǎng)通信。本文選擇西門(mén)子可編程控制器 S7200 為核心部件，著重進(jìn)行硬件接口設(shè)計(jì)，利用梯形圖和語(yǔ)句表進(jìn)行編程，實(shí)現(xiàn)了十字路口交通燈控制系統(tǒng)的自動(dòng)化。每個(gè)路口采用 LED 數(shù)碼管，倒計(jì)時(shí)顯示，使得計(jì)時(shí)功能更加直觀。關(guān)鍵詞：西門(mén)子；PLC；交通信號(hào)燈；控制；LED；倒計(jì)時(shí)畢業(yè)設(shè)計(jì)（論文）報(bào)告紙 III┊┊┊┊┊┊┊┊┊┊┊┊┊裝┊┊┊┊┊訂┊┊┊┊┊線┊┊┊┊┊┊┊┊┊┊┊┊┊ ABSTRACTSince the inception of traffic lights, its internal control system on the circuit to be continuously improved. Design began to diversity, so that even more intelligent traffic lights. Traffic control as an integral part of the traffic signals should also be suitable for the actual social situation. This is the choice making crossroads, traffic lights.Programmable Logic Controller (PLC) microprocessor core, based on monly used electrical relay contactor control system ladder diagram piled programming language, programming is easy, convenient features extend, modify and flexible, and simple, anti interference ability. Siemens PLC instruction rich, you can take a variety of output, input expansion device with rich special expansion devices, including analog input devices and munications equipment is according to the traffic light control system requirements and features, the ability to easily work munication.This choice of Siemens S7200 programmable controller as the core ponents, hardware interface design focuses on the use of ladder and statements table programming, a crossroads of traffic light control system intersection with LED digital tube, countdown display, making timing more intuitive functionality.【Key Word】: siemens。 PLC。 traffic lights。 control。 LED。 countdown畢業(yè)設(shè)計(jì)（論文）報(bào)告紙 IV┊┊┊┊┊┊┊┊┊┊┊┊┊裝┊┊┊┊┊訂┊┊┊┊┊線┊┊┊┊┊┊┊┊┊┊┊┊┊目 錄摘 要 ........................................................................................................................................................IIABSTRACT..............................................................................................................................................III第一章 緒論 ...............................................................................................................................................1 引言 .............................................................................................................................................1 課題研究目的及意義 ...................................................................................................................1 課題主要研究工作 .......................................................................................................................2 本課題的主要內(nèi)容 .......................................................................................................................2第二章 PLC 的基礎(chǔ) ..................................................................................................................................3 PLC 的基礎(chǔ)和特點(diǎn) .......................................................................................................................3 PLC 的結(jié)構(gòu)和工作原理 ...............................................................................................................4 PLC 的基本結(jié)構(gòu) ...............................................................................................................4 PLC 的工作原理 ...............................................................................................................6第三章 西門(mén)子 S7200 系列 PLC 的硬件單元 ........................................................................................7 主機(jī) ...............................................................................................................................................7 CPU 的主要特點(diǎn) ...............................................................................................................7 存儲(chǔ)系統(tǒng) ...........................................................................................................................8 擴(kuò)展單元 .......................................................................................................................................8 特殊功能模塊 ...............................................................................................................................9 內(nèi)部軟元件 .................................................................................................................................10 基本指令 .....................................................................................................................................11第四章 控制方案設(shè)計(jì) ...........................................................................................................................13 技術(shù)控制要求 .............................................................................................................................13 總體方案確定 .............................................................................................................................14 方案的原理 .....................................................................................................................14 方案的特點(diǎn) .....................................................................................................................15 方案的選擇依據(jù) .............................................................................................................15第五章 I/O 分配及元器件選型