Networked train broadcasting system and implementation method

Abstract

The invention discloses a networked train broadcasting system and an implementation method, and belongs to the technical field of urban rail transit vehicles and motor train units. A full Ethernet topology is adopted and is matched with a digital multimedia terminal. The POE power supply IEEE 802.3 af / at technology is adopted for the low-power-consumption terminal device. The switch adopts a dynamic host configuration protocol DHCP to automatically allocate the IP address of the terminal device. A VoIP technology is adopted to realize visual digital intercom. Based on a gigabit Ethernet communication technology, an embedded processor is used as a core, a full Ethernet topology, a digital multimedia terminal and an integrated control host are adopted, three subsystems are integrated with the Ethernet, and terminal device uses a POE power supply and DHCP technology.

Description

technical field [0001] The invention belongs to the technical field of urban rail transit vehicles and EMUs, and relates to a networked train broadcasting system and an implementation method. Background technique [0002] At present, the on-board broadcasting system of subway light rail or EMU generally adopts bus-type control technology and analog audio transmission technology; during the transmission process of carriages, the control signals and analog audio and video signals between the hosts of each carriage are easily affected by the environment and other system signals. Interference problem; the system needs to adopt the transmission mode of network topology. [0003] The broadcast failure rate of the existing technology is high: [0004] In the semi-automatic station reporting mode of the prior art, the broadcasting system performs station reporting logic operations through the level signal changes of the door, five kilometers and thirty kilometers. , jumping statio...

AI Technical Summary

Problems solved by technology

[0005] Software problem: there is a BUG (loophole) in the logic of radio station announcement; MP3 player board problem: poor contact of CF card, voice file cannot be played; abnormal input of door, five-kilometer and thirty-kilometer level signals;

[0011] The tail car redundancy function cannot be used when the main engine fails during single-driver driving; double main control failures are likely to occur when the network is interrupted; the operation information of the main engine and the backup machine cannot be fully synchronized; the switching of the redundant function is actually too slow, and it is better to "restart the main engine" in an emergency "Efficient and efficient

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