7220056辽宁省交通高等专科学校学报JOURNALOFLIAONINGPROVINCIALCOLLEGEOFCOMMUNICATIONSVol.7No.2Jun.2005:1008-3812(2005)03-054-02任中民(110122)本文分析了现代交通控制与管理问题的现状,根据城市交通的实际情况,阐述了交通灯数字控制系统的工作原理,给出了一种简单实用的城市交通灯数字控制系统的电路设计方案交通灯数字控制时间发生器定时器触发器译码:TM764.2:A1,,,,,,,,,(),,,,,,12,,,,,,:2005-04-20()(1)320.253.1时间发生器电路74191,(2)555,4s(f=1/T=0.25HZ):T1=(2R2+R1)Cln2=0.7@5.7M8@1Lf,74191CP(CP)74191QAQBQCQD3#54#2:QAQBQCQD=0000,DDI0QAQBQCQD=10000,74191,LDQ1,ACVCC,BDQ,D5153.2控制器电路RC,(2)QAQBQCQD=0000,I0,Q1LD,741910000,I1,;,Q1=1Q2I1RCQ1:,,(I1=0,Q266s)T=RCln3=1.1@6M8@10,f=66s3.3光电检测电路(车辆检测电路),,CP850CP851CP853,15~25m3.4交通灯数字控制系统及驱动电路D,(3)D,,60s,,,,,(4)44,,EWB,,,1....19992....2003TheCircuitDesingonTrafficLights.DigitalControlSystemRenZhongminAbstractsThepaperanalyzedthepresentconditionaboutmoderntrafficcontrolandmanagement.Basedonthepracticalcon-ditionincitytransportation.Itillustratedtheworkingprinciplesoftrafficlights'digitalcontrolsystemandprovidedasimplebutpracticalcircuitdesigningplanforurbantrafficlights'digitalcontrolsystem.Keywordstrafficlightsdigitalcontroltimegeneratortimertriggerdecode#55#