Design And Implementation Of Monitoring Software For Train Network TRDR Message Data Communication

With the continuous development of train network control technology,the traditional train communication network(TCN)is gradually unable to meet the increasingly diversified train network service demands due to its slow transmission rate.Since the International Electrotechnical Commission released the IEC61375 series of protocols,a new generation of train communication network consisting of the train real-time data communication protocol,the train Ethernet backbone network and the train Ethernet network has gradually become the mainstream of current train communication.TRDP provides two communication modes:real-time periodic process data and aperiodic message data."Fuxing" Chinese standard EMU has adopted TRDP process data communication to control the equipment in the vehicle network,but has not combined TRDP message Data communication applications are used on trains.Therefore,the application research of TRDP message data communication in train network is of great significance.On the basis of studying the development of train network communication,this subject further analyzes the composition and structure of train Ethernet network,and focuses on the train real-time data protocol and TRDP message data communication mechanism.Combined with the practical application of TRDP message data communication in train network,adopting the idea of object-oriented programming and using Qt Creator software to design a train network TRDP message data communication monitoring software.Firstly,according to the top-down design principle,a train network TRDP message data communication system with monitoring function is constructed.Based on the overall design of the system,through the analysis of hardware requirements,the selection of the monitoring host is completed.Through the analysis of software requirements,the software is structured into four parts: the underlying driver module,the TRDP message data communication module,the database module and the monitoring interface.Then design the functions of each module according to the overall architecture of the software,and complete the connection with the bottom layer of the TRDP protocol in the bottom driver module;In the TRDP message data communication module,the TRDP message data communication function with standard train equipment,ETBN and video equipment is completed;In the database module,the recording of user information and important parameters in the communication process is completed;In the monitoring interface,the function of displaying the communication process to the user as a window of human-computer interaction is completed.Finally,a train network control system experimental platform is built to test the developed software.The test results show that the software has realized the communication monitoring functions of no reply,request reply,and request reply confirmation mode between the software and the standard train equipment.ETBN interactively obtains and analyzes the information in the train and controls the train marshalling function,and performs video data transmission function with video equipment,which meets the design requirements.