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摘 要
隨著社會(huì)的發(fā)展和進(jìn)步以及人民生活水平的提高，上路的車(chē)輛越來(lái)越多，但相應(yīng)的公路設(shè)施卻沒(méi)有相應(yīng)的改善，這就導(dǎo)致了城市交通擁堵問(wèn)題突出，而且擁堵的地方多是十字路口等車(chē)輛匯集處。如何改善交通燈控制系統(tǒng)，以適應(yīng)現(xiàn)在的交通狀況，成為競(jìng)相研究的課題，本文對(duì)該問(wèn)題給予了深刻地研究。本文十字路口交通燈控制系統(tǒng)主要用于處理十字路口車(chē)輛及行人通過(guò)的問(wèn)題，使其減少相互干擾，提高了十字路口的通行能力。
本文總結(jié)了交通燈控制技術(shù)的發(fā)展，討論了基于PLC的十字路口交通信號(hào)燈控制系統(tǒng)的設(shè)計(jì)可行性。根據(jù)PLC的工作原理并結(jié)合城市交通的實(shí)際狀況，本文提出了以三菱公司生產(chǎn)的FX2N-128MT-001型PLC作為基本控制核心，安排了四個(gè)方向的直行、左轉(zhuǎn)紅黃綠燈，人行道紅綠燈以及倒計(jì)時(shí)數(shù)碼管的具體配置；設(shè)計(jì)完成了PLC的I/O端口分配和控制程序；探索了基于紅外遙控的十字路口交通信號(hào)燈的無(wú)線(xiàn)強(qiáng)通控制方案并設(shè)計(jì)了具體的硬件電路及軟件控制程序。
關(guān)鍵詞：十字路口；信號(hào)燈；PLC；三菱；無(wú)線(xiàn)控制器
ABSTRACT
As the development of society and the advance in people’s living standard, More and more vehicles drive on road, meanwhile, road facilities corresponding haven’t got improved, which leads to the prominent of traffic jam. What’s more, traffic jams appear mainly at the gathering area of vehicles such as crossroad. How to improve the current traffic system becomes a hot point to research, and the paper revealed it deeply. Traffic light control system is mainly used to process passing of vehicles and pedestrians, reducing interference between vehicles and to promote the traffic capacity.
The paper summarized the development of traffic light control technology and discussed the feasibility of crossroad traffic signal light control system based on PLC. According to the PLC work principle and practical situation of crossroad, the paper presents FX2N-128MT-001 of Mitsubishi Corporation as control core, making arrangements of red, yellow, green light for straight going and for left-face; red， green light on sidewalk and figure manifestation of count down. Completed I/O port-settings and control procedure of PLC. The paper also searched the project of crossroad traffic signal light based on infrared remote control and designed the specific hardware circuit and software control programs.
Keywords: crossroad; traffic light; PLC; Mitsubishi Corporation; remote controller
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