【摘要】：城市交叉路口是交通系統(tǒng)的關(guān)鍵組成部分,路口交通秩序主要由交通燈來(lái)指揮,交通燈安裝在各個(gè)路口,通過(guò)紅、黃、綠三種顏色燈變換實(shí)現(xiàn)交叉路口交通的指揮。近年來(lái),隨著城市車(chē)流量不斷增加,交通壓力持續(xù)加大,對(duì)于駕駛員觀察紅綠信號(hào)燈,會(huì)出現(xiàn)被前車(chē)遮擋,被路邊綠化、廣告牌等障礙物遮擋,以及暴風(fēng)雨、大雪、霧霾等惡劣天氣造成能見(jiàn)度降低,都會(huì)阻礙駕駛?cè)思皶r(shí)獲取交通信號(hào)燈狀態(tài),極易造成交通事故,存在安全隱患。為了使駕駛員及時(shí)獲取前方路口交通燈情況,減少安全隱患,更方便的駕駛車(chē)輛,結(jié)合近年來(lái)無(wú)線網(wǎng)絡(luò)技術(shù)和傳感器技術(shù)的發(fā)展,本文設(shè)計(jì)了一種基于無(wú)線網(wǎng)絡(luò)ZigBee的車(chē)載交通燈監(jiān)視系統(tǒng),整個(gè)系統(tǒng)包括交通燈信號(hào)的產(chǎn)生部分,發(fā)射部分,接收部分,顯示部分,完整地將路口信息及信號(hào)燈狀態(tài)實(shí)時(shí)傳輸?shù)杰?chē)載終端上,使駕駛員對(duì)路口情況一目了然,避免干擾。本設(shè)計(jì)利用ZigBee的自組網(wǎng)的技術(shù),路口建立ZigBee交通信號(hào)燈網(wǎng)絡(luò),攜帶車(chē)載終端的車(chē)輛進(jìn)入網(wǎng)絡(luò)覆蓋范圍內(nèi)自動(dòng)加入該網(wǎng)絡(luò)。由于十字路口東西和南北方向信號(hào)燈狀態(tài)相反,需結(jié)合指南針傳感器判別車(chē)輛前進(jìn)方向,實(shí)時(shí)獲取當(dāng)前行駛方向上的信號(hào)燈信息,在車(chē)載終端液晶屏上顯示并伴有語(yǔ)音播報(bào),幫助駕駛員及時(shí)獲取前方道路交通信號(hào)燈情況,提前控制汽車(chē)做出應(yīng)對(duì),起到輔助駕駛的作用。在硬件方面,交通燈信號(hào)產(chǎn)生部分使用STC89C52單片機(jī)控制,ZigBee的發(fā)射和接收使用CC2530芯片+功率放大芯片RFX2401C構(gòu)成的ZigBee模塊,終端顯示部分使用HMI智能串口屏,添加語(yǔ)音模塊實(shí)現(xiàn)語(yǔ)音播報(bào),使車(chē)載終端更加人性化。軟件方面主要是對(duì)ZigBee協(xié)議棧Z-stack的移植和修改,傳感器代碼的移植,對(duì)各個(gè)接口的設(shè)計(jì),以及人機(jī)交互界面的設(shè)計(jì)。最后對(duì)系統(tǒng)進(jìn)行實(shí)測(cè),該系統(tǒng)監(jiān)視準(zhǔn)確,能為駕駛員提供及時(shí)、準(zhǔn)確的信號(hào)燈信息。
[Abstract]:Urban intersection is a key component of traffic system. Traffic order is mainly directed by traffic lights. Traffic lights are installed in all intersections to realize traffic command at intersections by changing red, yellow and green color lights. In recent years, with the increasing traffic flow and traffic pressure in cities, for drivers observing red and green traffic lights, there will be obstructions in front cars, roadside greening, billboards and other obstacles, as well as storms and heavy snow. Poor visibility caused by bad weather such as haze will prevent drivers from getting traffic lights in time. It is easy to cause traffic accidents and there are hidden dangers in safety. In order to make the driver get the traffic lights in front of the road in time, reduce the hidden danger of safety, and drive the vehicle more conveniently, combined with the development of wireless network technology and sensor technology in recent years, A vehicle traffic light monitoring system based on wireless network ZigBee is designed in this paper. The whole system includes the generating part of traffic light signal, the transmitting part, the receiving part and the displaying part. The information and signal state of the intersection are transmitted to the vehicle terminal in real time, so that the driver can understand the situation of the intersection at a glance and avoid interference. Based on the technology of ZigBee's ad hoc network, the ZigBee traffic light network is set up at the intersection, and the vehicle carrying the vehicle terminal enters the network coverage area automatically to join the network. Because of the opposite state of the signal light between the east and the south direction at the crossroads, it is necessary to distinguish the direction of the vehicle with the compass sensor, to obtain the signal light information of the current driving direction in real time, and to display and accompany the voice broadcast on the LCD screen of the vehicle terminal. Help the driver to get the traffic lights in time, control the car in advance and assist in driving. In the aspect of hardware, the traffic signal generation part is controlled by STC89C52 singlechip, the ZigBee module composed of CC2530 chip power amplifier chip RFX2401C is used to transmit and receive ZigBee, and the terminal display part uses HMI intelligent serial port screen. Add voice module to achieve voice broadcast, so that the vehicle terminal more humanized. The software is mainly about the transplantation and modification of ZigBee protocol stack Z-stack, the transplantation of sensor code, the design of each interface, and the design of man-machine interface. Finally, the system is monitored accurately and can provide the driver with timely and accurate signal light information.
【學(xué)位授予單位】：北方民族大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN92;TP277;U463.6

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本文編號(hào)：2348418