Research On Reliability Of Railway Vehicle Borne Broadcast System

Railway traffic vehicle broadcast system is an important component of vehicle Passenger Information System.It can provide passengers with voice broadcasting,emergency broadcast,emergency call and other functions,and also provide voice and intercom channels for drivers and flight attendants.Because of the rapid development of network technology,the design of the industry generally adopts the full digital scheme.After the voice is processed digitally,the process of picking,transmitting and seeding audio is carried out through the network transmission.But network systems are prone to malfunction,which can cause the entire broadcast system to fail.This thesis proposes three broadcast system transmission structures,Including the "dual redundancy network structure",new UIC568 analog bus architecture and digital analog redundant structure.Besides,the reliability of these three transmission structures is analyzed.Through the comparative study of reliability,the design of broadcast system is optimized,and good results are achieved.It is important to enhance the reliability of vehicular broadcast system...