Research On Wireless Transmission Technology Of High-speed Train Running State Monitoring Data

As a green and convenient means of transportation,high-speed trains have become one of the most important ways for people to travel.With the improvement of its speed and functions,it has become a hot issue in the current study of the railway industry to ensure safe in the running of High-speed train.Therefore,this article takes the High-speed train running stateas as the research object,combining with the data acquisition technology,data transmission technology and so on,the wireless transmission of train running status monitoring data is studied.First of all,this article describes the three-layer structure of wireless transmission in train running state:vehicle wireless monitoring network,vehicle-ground wireless transmission network and ground monitoring center,and carries on the detailed analysis to each part.Focus on the vehicle monitoring network and wireless transmission network.Secondly,this article designs a vehicle monitoring terminal with STM32F407 as the core processor.It synthetically uses a variety of sensors to collect the status information of the train internal equipment,such as voltage and current,combined with the LoRa wireless transmission module,such as 4G module,etc.The data collection and transmission of train running state monitoring are realized.Then,this article constructs a vehicle-mounted wireless monitoring network composed of collecting nodes,routing nodes and converging nodes.Combining with the star topology,the article aims at the possible inter-network conflicts and channel conflicts in the process of data transmission,designs vehicle monitoring network communication networking mode,data transmission process and command issuing mode.Next,this article designs the data transmission protocol of the vehicular wireless monitoring network and the protocol of the vehicle and ground communication.Through the IAR software development platform,the protocol transplantation of the wireless network nodes is realized,which makes the wireless nodes transmit data according to their respective transmission protocols,so as to ensure the reliability and effectiveness of the data transmission.Finally,the test platform is built,the hardware module and the data transmission performance are tested.The test results show that the hardware module has no abnormality,the data transmission reliability is high,the real-time performance is good,and the expected requirements are basically met.This article combines the software and hardware to realize the acquisition and transmission of the monitoring data of the train running state.It provides technical support for improving the train safe operation and the ability to predict the sudden accident.It provides a detailed and effective data decision support for the realization of the real "state repair",and maximizes the effect of the rail traffic.It can improve the efficiency of railway transportation and ensure the safe travel of trains and passengers.