Design And Research Of Vehicle-ground Wireless Communication Relay System Based On Embedded

With the booming development of the high-speed rail industry,high-speed trains have become China’s business card to the world.Real-time and efficient transmission of train operating status monitoring data can ensure that the ground operation and maintenance personnel can fully grasp the train operating status throughout the process,and early detection of existing problems in operation can improve maintenance efficiency.Therefore,this thesis combines embedded technology,data communication technology,etc.to study the transmission process of the running status monitoring data after the train enters the station.First of all,this thesis introduces the domestic and foreign train running status detection systems,and analyzes the shortcomings of the existing train running status detection data transmission process to describe the research significance of the subject.In view of these shortcomings,on the basis of in-depth analysis of the vehicle-ground communication architecture and communication environment,an embedded vehicle-ground wireless communication relay system is proposed.Secondly,through the selection of vehicle monitoring information and the analysis of system functional requirements,the communication part with USR-WIFI232-B and E62-433T20 D wireless modules as the core and the control part with STM32F103C8T6 and STM32F103RCT6 as the core were determined.A channel for the transmission of train running status monitoring data between trains and grounds was established.Later,according to the attributes of vehicle monitoring information,the transmission data frame and vehicle-to-ground communication protocol were designed.For the channel conflicts and unstable factors that may occur during the transmission process,the data transmission process and information security mechanism were designed to ensure the real-time and reliability data.Finally by establishing the software and hardware platform of the vehicle-ground wireless communication relay system,the function of quickly forwarding the running state monitoring information after the train enters the station is realized.Analysis of the test results shows that the embedded vehicle-ground wireless communication relay system improves the real-time and reliability of data transmission,and can also effectively reduce the interference of the complex electromagnetic environment and obstacles in the communication process,can provide more reliable and effective train data for the ground detection center,improve the railway transportation efficiency,and ensure the safety of passenger travel.