Design And Debugging Of The MVB Communication System For EMU Train On-Line Monitoring Device

With the rapid development of the high-speed train, the safety requirements of the train are also getting higher and higher. As the core operating mechanism of the motor car, once the failure of the transmission system will seriously affect the normal operation of the train. The working principle of the transmission system monitoring device is to monitor the key structure of the transmission system in real time, to identify and determine the fault location in time, and through the train communication network to the driver’s room to alarm, thereby avoiding or reducing the safety hazards of the train may occur.When the condition monitoring is carried out, the train monitoring system needs to transfer a large amount of relevant information such as operation status of equipment, train control and so on. Therefore, the technology of train communication network, which can guarantee the high-speed, real-time and large capacity information transmission, has emerged as the times require. This topic is based on the online monitoring and fault diagnosis device which is based on the transmission system of the motor car. The MVB communication system of the device is designed and debugged.This topic is based on the online monitoring and fault diagnosis device of CRH5 EMU train drive system, designing and debugging the MVB communication system of the device.Firstly, this paper introduces the significance of the on-line fault diagnosis of high speed train, the concept and development of the train communication network technology. In view of the fact that the fault of the transmission system is easy to occur, the importance of the design of the on-line fault monitoring device is put forward. Secondly, based on the MVB bus technology and MVB controller, the MVB communication system is designed combining with the control technology of ARM chip, RS485 bus and CAN bus communication technology. At the same time, the system’s self-checking circuit of boot and run is designed. And after deeply analyzing the structure of MVB protocol, the initialization and configuration of MVB communication system software is finished. Finally, the function of MVB communication system is debugged and tested, and the communication system is tested and verified by MVB conformance test according to the consistency test standard of train communication. It can be seen from the debugging and application results that the communication system is highly efficient and real-time, which is very suitable for the current EMU on-line fault monitoring system.