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本科畢業(yè)設(shè)計 基于AT89C51設(shè)計交通信號燈
單片機|智能交通燈|AT89C51|實時控制|控制單元|信號燈
文件格式:word+PPT
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論文正文共28頁。共12946字符數(shù)(不計空格)。整套壓縮包大。2.37MB。
中英文翻譯 BASED ON MCU INTERSECTION TRAFFIC LIGHTS THE CONTROLLER DESIGN(基于單片機的十字路口交通燈控制器的設(shè)計)
摘要
隨著經(jīng)濟的增長和人口的增加,人們生活方式不斷變化,人們對交通的需求不斷增加。城市中交通擁擠、堵塞現(xiàn)象日趨嚴重,由此造成巨大的經(jīng)濟與時間損失。資料顯示,對日本東京268個主要交叉路口的調(diào)查估計表明:每年在交叉路口的時間延誤,折成經(jīng)濟報失為20億美元;而在我國北京市,當早晚交通高峰時,交叉路口處的排隊長度竟達1000多米,有的阻車車隊從一個交叉路口延伸到另一個交叉路口,這時一輛車為通過一交叉路口,往往需要半個小時以上,時間損失相當可觀。
十字路口車輛穿梭,行人熙攘,車行車道,人行人道,有條不紊,這一切要歸功于城市交通控制系統(tǒng)中的交通燈控制系統(tǒng)。交通燈控制系統(tǒng)對于疏導(dǎo)交通流量、提高道路通行能力,減少交通事故有明顯效果,使城市交通得以有效管理。
本文所介紹的智能交通燈是采用單片機控制方法,以AT89C51芯片為控制單元。利用單片機實現(xiàn)對交通信號燈的實時控制,只要采用一塊單片機,加上簡單的接口與驅(qū)動放大電路,即可實現(xiàn)。本系統(tǒng)能根據(jù)實際車流量通過人工加減設(shè)置紅、綠燈點亮?xí)r間的功能;紅綠燈循環(huán)點亮,倒計時剩5秒時黃燈閃爍警示(交通燈信號通過P1口輸出,顯示時間通過P0口輸出至雙位數(shù)碼管)。本系統(tǒng)設(shè)計周期短、可靠性高、實用性強、操作簡單、維護方便、擴展功能強。
關(guān)鍵詞:單片機,智能交通燈,AT89C51,實時控制,控制單元
Design of traffic light based on AT89C51
Abstract
Along with the economic growth and the increase of population, people’s lifestyle changes ceaselessly, people on the traffic demand increases ceaselessly. City traffic congestion, congestion is serious, which causes great economic loss and time. Data shows, Japan Tokyo on 268 major intersection survey estimates that each year: at the intersection of time delays, folded into the economic loss of $2000000000; while in China Beijing City, when the morning and evening rush hour, intersection queue length up to 1000 meters, some resistance from a car team intersection extending to another intersection, then a car through an intersection, often need more than half an hour, time lost considerable.
Crossroads shuttle vehicles, pedestrians bustling, car dealership traffic lane, people walkways, everything in good order and well arranged, all this thanks to city traffic control system in traffic light control system. Control system of traffic lights to ease traffic flow, increase road capacity, the effect of significantly reducing traffic accidents, the city traffic can be effective management.
This paper introduces the intelligent traffic lights are controlled by single method, using AT89C51 chip as control unit. Chip microcomputer to realize the real-time control of traffic signal lamp, as long as the use of a single chip computer, coupled with a simple interface and drive circuit, can be realized. This system can act according to the actual traffic flow through the artificial addition and subtraction set of red, green light time function; traffic lights lit cycle, countdown 5 seconds left when the yellow light flashing warning ( traffic light signal through the output port P1, display time through the output port P0 to two digital tube ). The system design of short cycle, high reliability, strong practicability, simple operation, convenient maintenance, strong expanding function.
Keyword: Single chip microcomputer, intelligent traffic lights, AT89C51, real-time control, control unit
目錄
摘 要 II
Abstract III
第一章 引 言 - 1 -
1.1選題的目的及意義 - 1 -
1.2設(shè)計要求 - 1 -
1.2.1 工作流程 - 1 -
1.2.2 正常模式: - 1 -
1.2.3 意外模式: - 2 -
1.3研究目標、工作特色及工作進度 - 2 -
第二章 硬件設(shè)計 - 3 -
2.1 AT89C51單片機簡介 - 3 -
2.2 AT89C51單片機的主要性能參數(shù)和主要引腳 - 3 -
2.2.1 主要性能參數(shù) - 3 -
2.2.2 AT89C51芯片內(nèi)部結(jié)構(gòu)簡介 - 3 -
2.2.3 主要引腳功能 - 4 -
2.2.4 AT89C51單片機的時鐘電路 - 7 -
2.2.5 LED循環(huán)說明 - 7 -
2.2.6 硬件仿真圖 - 8 -
3.1 主程序流程圖 - 11 -
3.2 運行流程圖 - 12 -
3.3 LED顯示程序 - 13 -
3.4 程序代碼 - 14 -
參考文獻................- 23 -
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