基于PLC的智能交通燈監(jiān)控系統(tǒng)設(shè)計(jì)

電氣自動(dòng)化論文編號(hào):ZD081  字?jǐn)?shù):19555.頁(yè)數(shù):61,S7-200系列PLC

目 錄
第1章 緒論  1
1.1 交通燈發(fā)展現(xiàn)狀   1
1.2 交通燈監(jiān)控系統(tǒng)的設(shè)計(jì)意義   1
1.3 PLC控制設(shè)計(jì)內(nèi)容及任務(wù)   2
第2章交通燈系統(tǒng)總體方案論證   3
2.1 單片機(jī)系統(tǒng)控制   3
2.2 可編程序控制器控制   3
2.3 繼電器接觸控制   4
2.4 控制方案的確定   4
第3章系統(tǒng)硬件設(shè)計(jì)   7
3.1 系統(tǒng)的組成框圖   7
3.2 交通燈的控制過(guò)程   7
3.3 PLC的選型  9
3.4 擴(kuò)展模塊的選擇   11
3.5 監(jiān)控系統(tǒng)   15
3.6 通信系統(tǒng)   19
第4章系統(tǒng)軟件設(shè)計(jì)   21
4.1 系統(tǒng)控制過(guò)程   21
4.2 流程圖   21
4.3 交通燈工作時(shí)序圖   24
4.4 梯形圖   25
4.5 監(jiān)控界面設(shè)計(jì)   31
4.5.1 系統(tǒng)構(gòu)成  32
4.5.2 操作流程及通訊原理   32
4.5.3 VB中的MSComm控件選擇   35
4.5.4 方案的具體實(shí)現(xiàn)  36
4.5.5 結(jié)論  38
第5章設(shè)計(jì)總結(jié)  39
參考文獻(xiàn)   40
致謝   41
附錄1   42
附錄2   52

摘 要
目前，我國(guó)許多大中城市的交通壓力都非常大。部分交通路口的信號(hào)燈工作時(shí)間不合理，交通違章或肇事記錄不確切。所以，改善與提高現(xiàn)有的交通系統(tǒng)的工作效率，加強(qiáng)交通路口的信號(hào)燈控制和安全狀況的監(jiān)控是非常重要的。
本設(shè)計(jì)主要設(shè)計(jì)利用PLC來(lái)實(shí)現(xiàn)十字路口交通燈的控制與監(jiān)控。通過(guò)交通中心的主機(jī)根據(jù)具體城市各路口的需要控制各個(gè)十字路口的PLC，從而控制十字路口交通燈的變化，以及對(duì)各個(gè)路口的安全狀況進(jìn)行監(jiān)控，監(jiān)控機(jī)動(dòng)車(chē)是否違章、是否肇事，并把記錄的結(jié)果存儲(chǔ)、上傳和處理。
本設(shè)計(jì)的上位機(jī)采用PC機(jī)，使用VB高級(jí)語(yǔ)言做監(jiān)控界面。通過(guò)安裝在十字路口的監(jiān)控設(shè)備以及移動(dòng)電子監(jiān)控設(shè)備，對(duì)各個(gè)十字路口的安全狀況進(jìn)行監(jiān)控。下位機(jī)采用德國(guó)西門(mén)子的S7-200系列的CPU226做主機(jī)，配以擴(kuò)展模塊EM222。設(shè)計(jì)中采用S7-200編程軟件STEP 7 - Micro/WIN3.2進(jìn)行編程。采用順序功能圖與梯形圖相結(jié)合的方法設(shè)計(jì)程序。實(shí)現(xiàn)對(duì)城市十字路口的合理控制與監(jiān)控。
關(guān)鍵詞：PLC控制系統(tǒng)；梯形圖；交通燈

Abstract
At present, traffic pressure in many large and medium-sized cities in China is very great. Some traffic lights’s working hours is unreasonable, violation and records of the incident is inaccurate too. Therefore, to improve and enhance the existing transport system's efficiency and strengthen the control of traffic lights and monitoring the security situation is very important.
The main idea of design is to achieve the control of traffic lights at crossroads and monitoring by PLC. Through the host at control centre to control the various crossroads PLC according to the specific needs of the junction of the city,to control the change of traffic lights at the crossroads,and to monitor the security situation at crossroads, whether the vehicle violate regulations,whether cause incident， and to record The results. then, storage, upload and processing.
This design's superior machine uses PC, uses the VB higher order language to make the monitoring contact surface. Through installs in the intersection monitoring equipment as well as the mobile electron monitoring equipment, carries on the monitoring to each intersection's safe condition. The lower position machine uses German Simens's S7-200 series CPU226 to make the main engine, matches expands module EM222. In the design uses S7-200 programming software STEP 7 - Micro/WIN3.2 to carry on the programming. Uses methods design procedure which the smooth functional diagram and the trapezoidal chart unify. Realizes to the city intersection reasonable control and the monitoring.
Key words：PLC controlling system；Trapezoidal diagram；Traffic Light