A method for linking and unlinking train passenger information system

Abstract

A method for linking and unlinking a train passenger information system belongs to the field of embedded computers. The method is implemented by three threads, which are the MVB network linking and unlinking thread, the 8-network Ethernet linking and unlinking thread, and the 8-network segment IP maintenance thread. The MVB network linking and unlinking thread modifies the MVB linking address of the device to ensure that there will be no MVB address conflict between the two trains during linking. The 8-segment Ethernet linking and unlinking thread realizes that the network segment where the IP address of the 8-segment device is located changes with the change of the MVB linking address, ensuring that the two trains will not have an IP address conflict of the 8-segment device when connecting. The 8-segment IP maintenance thread checks the IP addresses of the 8-segment devices in a loop to ensure that the IP addresses of the 8-segment devices correspond to the connection status of the MVB network. The invention can be used as a method for satisfying the connection and decoupling of the train passenger information system after the physical recombination of trains in the subway field.

Description

Technical field [0001] The invention belongs to the field of embedded computers and relates to a method for coupling and unhooking of a train passenger information system. Background technique [0002] PIS (Passenger Information System) integrates the functions of passenger room broadcasting, intercom communication, information display and dynamic line map display, and is mainly used in the subway field. PIS takes the computer system as the core, and relies on MVB (Multifunction Vehicle Bus) technology, network technology and multimedia technology to realize system communication and provide passengers with information services. The PIS physical platform is mainly controlled by the broadcast control system unit ACSU (Announcement Control System Unit) located in the train driver's cabin, driver audio broadcast unit DACU (Driver Audio Communication Unit), touch display TLCD (Touch LCD) and the passenger room broadcast control in the train passenger compartment The unit PACU (Passen...

AI Technical Summary

Problems solved by technology

[0008] When the train is running normally, the number of passengers will increase significantly during the rush hour. At this time, the train cannot meet the needs of carrying all passengers, and some passengers will have to wait for the next train. There are a lot of people in the car, which affects the comfort of the car. At the same time, it will bring personal safety problems in a crowded environment and increase the risk of losing personal property. In view of the above situation, a good solution is to use the physical connection of the train. To connect the two trains, the PISs of the two trains should also be connected to form a new PIS

When the passenger flow decreases, if the operation is still carried out in a physically connected manner, it will cause waste of resources and increase operating costs. Therefore, at this time, the two trains should be physically disconnected, and the PIS should be disconnected at the same time to restore the two trains. Independent PIS

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