| With the development of open community,the traffic noise impact on community residents is becoming more and more prominent.In order to solve the problem,an open community traffic signal control system is studied,which induces non-resident vehicle to avoid the community at night.Firstly,the development status of open community traffic management and traffic signal control system is discussed,the system functional requirements is proposed.Based on these,the overall scheme of open community traffic signal control system is designed,including the design of remote control center and community entrance field control system.The remote control center includes system data server and management PC;the community entrance field control system includes five equipment units: field controller,vehicle detector,license plate recognition camera,signal lamp module and information release screen.Secondly,the community entrance field control system is studied to realize the operation of normal mode and late-night mode of the system.Hardware circuits of field controller and signal lamp module are designed.Hardware circuits of field controller include power supply circuit,RS485 interface circuit and Ethernet interface circuit.According to the functional of the system,equipment selection of vehicle detector,license plate recognition camera and information release screen is carried out.And then,the working process of normal mode and late night mode are given,the strategy of late night mode are proposed.The communication protocols between the field controller and the server,the field controller and the signal module are designed.Thirdly,the data server of the system is designed,including the construction of thedatabase and the configuration of the system server.Using MySQL to build the database system,and using SQLyog to manage the database interface.According to the function of system data,the database can be divided into authority management data,intersection data and late-night mode data.Several data tables are established to realize the classified storage of these system data.Using ADO.NET to realize the function of adding,deleting and checking the database data of the system,and multiple program interface of server visits are designed based on WCF service.Using timer to realize the start and end of late-night mode,driving record and illegal record and other functional modules.Then,the upper computer management interface is designed.Analyze the functional requirements of the upper computer management interface,and realize management functions such as login authority,intersection information,forbidden time scheme,administrator authority,access authority,driving record and violation record.Finally,according to the late-night mode control strategy,the "system operation and test interface" is designed.Through the joint debugging of the system server,host computer management interface and MySQL database,the system software function is tested.The simulation results show that the system can identify the vehicle in time in the late-night mode,and induce the resident vehicles to enter the community and the non-resident vehicles to avoid the community. |
