Research On Offline Analyzing System About Railway Signalling

There always be some malfunction or interference in railway signalling, which makes the cab-signal system fail to demodulate signal. And the process of demodulation of cab-signal require real-time and high speed, once there is a mistake, we can hardly get sufficient time to fix it. In order to improve this situation, it is necessary to research on the static analyzing system to find out the disadvantages that cause the problem.The paper presents the design and realization of Offline analyzing system about railway signalling, introducing the spectrum analysis and Instantaneous Frequency Measurement used in the system. It analyses railway signalling demodulation technology and scheme including pattern recognition, signal classification strategy, the relationship between signal parameters and malfunction, the technique of anti-jamming and so on. The software is completed with the method of Object-Orientd Programming .The paper introduces the flow of program of the demodulation arithmetic and the realization of program module. At last it analyses the results of system's test.By using this system, it can implement the signal demodulation flexibly in a wide frequency range, remove and check the signal malfunction, detect the signal interference, and provide a definite maintenance scheme for the surfaceman. Meanwhile, it has important meaning and practical value for improving the maintenance skill of railroad site and ensuring the success of demodulation of the cab-signal.