基于单片机的红绿灯控制系统设计

湖南工业大学本料毕业设计〔论文)ABSTRACTWith the development of transportation,people began to change the timingduration of signal lights and gradually realized the importance of optimizing signaltiming.Traffic light control at crossroads also entered the era of optimal controldesign.The Green Wave system established in Salt Lake in the United States in 1989is arguably the first generation of an optimal intersection traffic signal control system.As the construction of China's highway network becomes more and more complete,the number of motor vehicles has gradually increased,and many urban traffic trunkroads have experienced phenomena such as traffic congestion and congestion,and theincidence of traffic accidents has increased year by year.Under such circumstances,itis necessary to step up efforts to study programs for solving urban traffic problemsand accelerate the development of intelligent transportation systems.In the intelligenttraffic system,the traffic signal light is the most important command system,and it isclosely related to the road intersection traffic conditions and people's travel safety.Therefore,it is of great practical significance to provide a reliable,safe,andconvenient traffic light control system.This design adopts AT99C51 one-chip computer as the central controller,adoptsthe light emitting diode to imitate the traffic light signal,and adopt the LED digitaltube countdown to display the traffic light time.The optoelectronic switch is used tomeasure the flow rate information at crossroads and transmitted to the SCM controlsystem through the communication module.The control system selects thetimekeeping scheme for the traffic light according to this,and then transmits thisinformation to the time display circuit and the signal lamp circuit,and at the sametime utilizes the buzzer.The realization of the voice broadcast function.The design ofthe traffic light control system with adjustable duration promotes the development ofintelligent traffic and improves the traffic effect at crossroads.Keywords:MCU;signal lamp;control system;2