Design And Implementation Of Interface Protocol In Integrated Supervisory Simulation System

The railway signaling system is the core equipment for commanding and controlling the train operation.Therefore,the key to improving the efficiency of railway transport and ensuring the safe operation of train is ersuring that the operation of the railway signaling system is safe and stable.At present,railway transportation mainly uses the signaling system monitoring to supervise the operation status of other railway signal systems.The signaling system monitoring collects the information about running state of each railway signal system through the interface communication,analyzes critical data synthetically,completes the prediction and diagnosis of the fault,and reports the abnormal situation promptly.The processing of the interface data protocol is the core of data process in the railway signaling system monitoring.However,the data communication protocols are diverse and complicated due to the diversity of the monitored objects and the different lines.In the case of the railway signaling system monitoring is applied on different lines and communicating with different signal systems which have various protocls,the dedicated processing procedures need to be wirtten.As a result,the process becomes complicted,and is not conducive to the expansion and maintenance of the system.So it is very necessary to design a reasonable protocol processing strategy.Based on the framework of the integrated supervisory simulation system,an extensible and easy-to-maintain protocol processing is designed in this paper,and displaying the prased data in concentration is also added.Firstly,the researching status of signal monitoring system and the method of praseing protocol are briefly summarized.Secondly,the signal systems that interface with the simulation system and the contents of the data communication protocol are introuduced.Then,we analyze the objectives of the design and the requirement of the function;besides it is devided into protocol pocesin moudle and the prased data displaying moudle.And by using the factory method design pattern and the XML configuration file which is used to describe the protocols and lines,the protocol processing is designed;a device staus dictionary XML configuration file which is used to display the prased data is designed as well.Finally,the protocol processing module and the prased data displaying module are realized by using Python and wxPython library;In addition,the original data is used to verify the software,the results show that it worked as we expected.