A train passenger information system coupling and decoupling method

Abstract

The invention discloses a train passenger information system coupling and decoupling method, and relates to the field of an embedded computer. The method is implemented by three threads which are respectively an MVB network coupling and decoupling thread, an 8 network segment Ethernet coupling and decoupling thread and an 8 network segment IP maintaining thread. The MVB network coupling and decoupling thread amends an MVB coupling address of the device, ensuring no occurrence of MVB address conflicting between two trains in coupling. The 8 network segment Ethernet coupling and decoupling thread implements changing a segment where the 8 network segment IP address locates over the change of the MVB coupling address, ensuring no occurrence of 8 network segment device IP address conflicting between two trains in coupling. The 8 network segment IP maintaining thread ensures IP address of the 8 network segment device IP address correspond to the MVB network coupling state by circle detection on 8 network segment device IP address. The invention may satisfy coupling and decoupling of train passenger information after the train is physically recombined in the field of subway.

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 composed of ACSU (Announcement Control System Unit) located in the train driver's cabin, driver audio broadcasting unit DACU (Driver Audio Communication Unit), touch display TLCD (Touch LCD) and passenger room broadcast in the train passenger compartment The control unit PACU (Passenger Announcement Control Unit) is bui...

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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