【正文】 機(jī)、交通燈顯示、LED 倒計(jì)時(shí)、車流量檢測(cè)及調(diào)整、違規(guī)檢測(cè)、緊急處理、時(shí)間模式手動(dòng)設(shè)置等模塊組成。關(guān)鍵詞：交通控制，傳感檢測(cè)，AT89S51，倒計(jì)時(shí)顯示 畢業(yè)設(shè)計(jì)（論文）IIAbstractTraffic control system is a modern society with logistics, travel etc of traffic development a unique set of public management system. To ensure the effective safety traffic, except for a series of traffic rules, still must through certain technological means to achieve. Based on analysis of traffic control, based on realtime detection sensor, adjust the implementation technology of intelligent control, realtime monitoring, sensor adjust vehicles time algorithm and singlechip microputer control function is proposed, which bines the traffic control system based on single chip design scheme.The 8051 microcontroller control system consists of the traffic lights display, 8051 monolithic integrated circuits, and LED the countdown, traffic violation detection, emergency adjustment, manual mode, time as modules. In addition to the basic traffic function outside, still have time to manually set, can pass the countdown, car that forced through traffic, inspection and adjustment, transportation and processing abnormal discriminant functions. Theory shows that the system can simple, economic and effective relieves traffic, improve the crossroads capacity.This design mainly do the following aspects: one is the work of the traffic control system design, including the crossroads, specific design and system should be restricted with each function, two is that the sensor, the hardware circuit design of the circuit and the basic function and requirement. Key Words: traffic control, sensing detection, displayand countdown ，AT89S51 畢業(yè)設(shè)計(jì)（論文）目錄摘 要 .........................................................................................................................................................IABSTRACT .................................................................................................................................................II1 緒 論 .................................................................................................................................................1 單片機(jī)交通控制系統(tǒng)的選題背景 .................................................................................................1 單片機(jī)交通控制系統(tǒng)選題的現(xiàn)實(shí)意義 .........................................................................................1 國(guó)內(nèi)外研究現(xiàn)狀及其發(fā)展 .............................................................................................................3 國(guó)內(nèi)外交通控制技術(shù) ..............................................................................................................3 交通控制存在的問題 ..............................................................................................................6 單片機(jī)交通控制系統(tǒng)主要研究的內(nèi)容 .........................................................................................72 單片機(jī)交通控制系統(tǒng)總體設(shè)計(jì) ............................................................................................................8 單片機(jī)交通控制系統(tǒng)的通行方案設(shè)計(jì) .........................................................................................8 單片機(jī)交通控制系統(tǒng)的功能要求 .................................................................................................9 單片機(jī)交通控制系統(tǒng)的基本構(gòu)成及原理 ...................................................................................113 系統(tǒng)硬件電路的設(shè)計(jì) ..........................................................................................................................12 系統(tǒng)硬件總電路構(gòu)成及原理 .......................................................................................................12 系統(tǒng)硬件電路構(gòu)成 ................................................................................................................12 系統(tǒng)工作原理 ........................................................................................................................13 AT89S51 單片機(jī)簡(jiǎn)介 ...................................................................................................................13 單片機(jī)的概述 ........................................................................................................................13 AT89S51 芯片內(nèi)部結(jié)構(gòu)簡(jiǎn)介 ................................................................................................14 主要引腳功能 .......................................................................................................................16 AT89S51 芯片最小系統(tǒng) ........................................................................................................18 其它硬件介紹及連接 ...................................................................................................................19 車流量檢測(cè)電路及模擬 ........................................................................................................19 違規(guī)檢測(cè)電路及模擬 ............................................................................................................22 八段 LED 數(shù)碼管 ..................................................................................................................23 其它器件 ................................................................................................................................254 系統(tǒng)軟件程序的設(shè)計(jì) .........................................................................................................................29 程序主體設(shè)計(jì)流程 .......................................................................................................................29 理論基礎(chǔ)知識(shí) ...............................................................................................................................31 定時(shí)器原理 ............................................................................................................................31 軟件延時(shí)原理 ........................................................................................................................31 中斷原理 ................................................................................................................