Highway Tunnel Traffic Guidance And Control Strategies And Systems To Achieve

According to the actuality of freeway tunnel traffic inducement and controlling system, in the basis of the freeway tunnel impact and control development flat- form, the paper puts forward a new strategy and accomplishes the traffic inducement and controlling based on it by programmable logic controller (PLC).Through analyzing freeway tunnel operating circumstance, the paper sums up the general rule of tunnel traffic inducement and controlling, and provides a strategy of traffic inducement and controlling in the normal, crowded and accident conditions. Especially the program of conflict between up-river vehicles in object-traveled lane and blocked ones in the accident condition is solved successfully.By using CS1-series PLC of OMRON Corporation, locale controller network based on all-distribute field bus is constructed, and controlling locale equipments is accomplished. The paper settles the problems of Ethernet communication based on Fins format, Controller Link network communication and protocol macro communication between locale controller and serial device and develops the controlling network program with the help of CX-Programmer 4.0, a kind of PLC programmer software.By Visual Basic 6.0, monitor computer software of the system is completed, the program of system's self-diagnoses of controlling is worked out and the operation of traffic inducement and controlling under the three operations state of freeway tunnel is realized.