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基于s7-200系列plc的交通信號燈控制系統設計(于-wenkub

2022-11-28 21:47:35 本頁面
 

【正文】 ot be unstable the question which brings. This article in has analyzed in the traffic control domestic present situation foundation, explained the key job which present paper39。 課題設計的相關技術的現狀 ................................................................................... 1 本文的主要工作 ....................................................................................................... 2 2 十字路口信號燈控制的基本理論和方法 .......................................................................... 3 車輛的存在與通過的檢測 ....................................................................................... 3 感應線圈 ......................................................................................................... 3 傳感器的鋪設 ................................................................................................. 3 課題選用的 PLC 介紹 .............................................................................................. 4 硬件特點 ......................................................................................................... 5 編程軟件與接口電纜 ..................................................................................... 6 交通燈控制方式 ....................................................................................................... 7 控制系統的組成 ............................................................................................. 7 車流量的計量 ............................................................................................... 9 交通信號的控制方式 ................................................................................... 9 3 交通信號燈的模糊控制 .................................................................................................... 13 控制理論的發(fā)展與模糊控制理論的提出 ............................................................. 13 概念 ............................................................................................................... 13 變量選擇與論域分割 ..................................................... 錯誤 !未定義書簽。 模糊規(guī)則的設計 ............................................................. 錯誤 !未定義書簽。 交通信號燈控制策略 ............................................................................................. 20 5 結論與展望 ........................................................................................................................ 23 致 謝 ................................................................................................................................ 25 參考文獻 ................................................................................................................................ 27 附 錄 ................................................................................................................................ 29 聲明 CONTENTS VII CONTENTS 1 Preface ................................................................................................................................. 1 Topic background and significance ................................................................................. 1 Topic design correlation technique present situation ...................................................... 1 This article prime task ..................................................................................................... 2 2 The intersection signal light controls elementary theory and method................................. 3 Vehicles39。 fuzzy control.......................................................................... 13 Control theory development and fuzzy control theory statement ................................. 13 Concept................................................................................................................... 13 Variable choice and universe of discourse division................................................ 14 Fuzzy control rule................................................................................................... 14 Fuzzy method choice and determination ....................................................................... 15 Street intersection number of vehicles fuzzy.......................................................... 15 Fuzzy rule design.................................................................................................... 16 The fuzzy reasoning algorithm and the solution are fuzzy..................................... 16 4 Realizes based on the PLC fuzzy control system39。而城鎮(zhèn)道路建設和交通管理相對滯后, 人車爭路、 道路擁擠、阻塞現象、交通事故等時常發(fā)生。 課題設計的相關技術的現狀 城市交通控制系統是用于城市交通數據監(jiān)測、交通信號燈控制與交通疏導的計算機綜合管理系統。 通常是事先經過交通流量的調查,運用統計的方法將兩個方向紅綠燈的延時預先設置好。 智能控制交通系統是目前研究的方向,也已經取得不少成果,在少數幾個先進國家已采用智能方式來控制交通信號,其中主要運用 GPS 全球定位系統等。 采用 PLC 是基于以下四個原因: 1) PLC 具有很高的可靠性,通常的平均無故障時間都在 30 萬小時以上; 2)編程能力強,可以將模糊化、模糊決策和解模糊都方便地用軟件來實現;
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