Design And Application Of Signal Interface Unit In The Earthquake Monitoring And Early Warning System Of High-speed Railway

At present,high-speed railway operating mileage of China has more than 2 million kilometers,ranking first in the world,this had formed a "four vertical and four horizontal" railway network which covering the major population concentrated areas of China.At the same time,China is one of the countries in the world which have the most intense seismic activity and earthquake disasters.Earthquakes often cause different degrees of impact on the railway subgrade,track and bridge,affecting the normal operation of the train,endangering the safety of life and properties of passengers.The 5 major earthquake zones in China are coincident with the dense high-speed railway network,which leads to the serious potential risk in the operation of the high-speed railway.Therefore,the high-speed railway in China is highly needed to construct a complete set of earthquake monitoring and warning system,which can quickly realize the earthquake emergency disposal of the train before the earthquake damage occurs.Through the research of the development history and application status of the home and abroad railway earthquake monitoring and warning system and absorbing advanced technology of high-speed railway earthquake emergency disposal,this dissertation proposes a complete earthquake monitoring and early-warning signal interface unit design solution,which conforms to the present situation of our country's high-speed railway.The main contents of this paper are as follows:1.According to?The provisional technical requirements of high-speed railway earthquake monitoring and early-warning system?,this paper completes the functional design,the interface design to the related systems and RAMS design which makes the detailed reliability analysis and comparison to determine signal interface unit use the hot standby parallel model.2.Through the comparison of the advantages and disadvantages of industrial PC and embedded development architecture,the signal interface unit hardware design adopts the easy extension and flexible configuration of IPC design and the function module mainly includes network interface module,processing module,input and output interface module,the logic control module,power module and relays and protection unit.3.The software design of the signal interface unit adopts Java language with the characteristic of cross platform and hierarchical design model to complete the UI design and communication interface design with the earthquake monitoring stations,railway administration center system and signal system.4.Through the analysis of earthquake early warning relay characteristics and the optimization of the relay circuit,this paper reduce the earthquake early warning relay action time from the original 200 ms to 100 ms.As a result,to get more reaction time for the high-speed railway in the earthquake zone by shorting the signal interface unit processing time and improving the efficiency of the emergency disposal of earthquake monitoring and early-warning system of high-speed railway.By constructing the test environment of earthquake monitoring and early-warning system in the Datong-Xian high-speed railway,including the construction of signal interface unit and earthquake monitoring unit,railway administration center system and signal system communication interface,and the test of signal interface unit transmission disposal commands in real time by simulation of earthquake early warning information transmission.The test shows that the function and performance of the signal interface unit in this paper can meet the requirements of the?The provisional technical requirements of high-speed railway earthquake monitoring and early-warning system?.