MVB physical layer waveform monitoring and early warning method

Abstract

The invention discloses an MVB (Multi-function Vehicle Bus) physical layer waveform monitoring and early warning method, which comprises an MVB data receiving unit, a data display unit and a monitoring and early warning unit. Firstly, the physical signals on an MVB are converted into two groups of data link signals, the two groups of data link signals are compared to judge whether the two groups of data link signals are the same or not, then, one group of data link signals is converted into network layer signals, the group of network layer signals are compared with a protocol standard pre-stored in a cloud database to judge whether the network layer signals are in a normal state; secondly, the two groups of data link signals of the obtained result are electrically connected with the data display unit; thirdly, the data display unit is connected with the monitoring and early warning unit, the monitoring and early warning unit compares the obtained data signals with a pre-stored data waveform to judge whether the data signals are in a normal state or not, and the accuracy of judging a data source is improved; and finally, the data signals are compared with a pre-stored oscillogram in the monitoring and early warning unit, so that the data of each branch line can be quickly analyzed, and the use state can be judged.

Description

technical field [0001] The invention relates to the field of train monitoring and early warning methods, in particular to a method for monitoring and early warning of MVB bus physical layer waveforms. Background technique [0002] Multifunctional Vehicle Bus (MVB) is a serial data communication bus mainly used (but not exclusively) for interconnected devices requiring interoperability and interchangeability. MVB bus is currently the most advanced The in-vehicle device bus adopts redundant bus connection technology and Manchester coding method, and can provide different data supports according to actual application requirements, and can provide communication interfaces and communication services for each device on the bus. At present, MVB related products have been used in a certain number of domestic EMU trains. [0003] In the Chinese patent CN201720633066.3, a MVB bus safety monitoring and analysis system is introduced, in which the embedded software on the ARM processor ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the early warning and monitoring of the prior art cannot achieve the function of active intervention and have an impact on daily use, the present invention provides a method for monitoring and early warning of the physical layer waveform of the MVB bus. The received data signals are first compared with each other to find out whether they have the same structure, and then a group of network layer signals are compared with the cloud database. The double-layer comparison method improves the accuracy of judging the source of the data, and finally through Compared with the pre-stored waveform diagram in the monitoring and early warning unit, it is judged that it is in normal use state, so that the data of each branch line can be analyzed more quickly, and the use state can be judged. Through the set waveform detection and early warning structure, the user can directly observe and collect Compare and judge with the waveforms on each branch line, and realize mobile processing through the communication module at one end, receive MVB bus data feedback in real time, improve the efficiency of monitoring, and the communication module can also respond to abnormal data obtained , and synchronized to the cloud database to improve the automatic judgment and learning ability of judgment

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