The Security Information Transmission System Between Optical Communication Station Of Semi-automatic Block

As an important branch of China's railway,the security signal control technology of single track railway has became a hot topic of domestic scholars.The traditional inter-station signal is transmitted through the cable channel,but with the development of computer and optical communication technology,the drawbacks of cable transmission are gradually emerging,so more and more research tends to use optical communication and wireless transmission technology for railway semi-occlusion Interval signal transmission.This subject is based on the research of the security Information transmission system between the optical communication station of Semi-automatic Block.This system is used for64 D single-line semi-automatic block interval signal transmission,its role is to add two optical channels and the two optical channels work with the original cable channel together to form a redundant transmission channel backup,and implement real-time monitoring of transmission channel.When one channel fails,the system can automatically switch to the alternate channel to complete automatic switching of the optical cable and the cable.In the event of a failure,the system can also send an alarm and automatically initiate the backup device to ensure proper operation of the system.In addition,the system can also remind the staff to deal with failure in a timely manner.After the fault is completely removed,the system will return to the original working state.This semi-automatic block interval signal transmission system makes the railway communication more intelligent,reducing the manual operation,greatly improving the security and reliability of railway signal transmission.This thesis analyzes the research background,domestic and foreign development status of this topic and current use of the blocking mode firstly,and then introduces the block process of 64 D semi-automatic block interval signal transmission system,the composition of block equipment and other relevant basic theories briefly.This paper also designs an improved security Information transmission system between the optical communication station of Semi-automatic Block.This system uses optical cable instead of the original transmission cable e.g.wire and electric cable,forming the redundancy channel and real-time monitoring of channels.This paper focuses on the analysis of the hardware circuit design and softwareprogram design of the security transmission system MCU between the semi blocking optical communication station.The security transmission system MCU is based on the STM32103 VC chip of ARM company.Finally,the system is tested in the laboratory and also evaluate in the actual situation,the test and evalution results show that the system has basically achieved the design requirements,and the operation is stable and reliable,so the system can be put into the actual railway.