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《Electronic Measurement Technology》 2007-02
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Research on railway signal real time analyzer based on virtual instrumentation

Liu Baosheng Zhao Huibing(State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044)  
Track circuit plays an important role in automatic train control system.It can be examined by testing the railway signal parameters according to certain testing requirements.In this paper,a new test method was put forward so as to acquire the FSK modulated railway signal parameters in real time.Railway signal samples were firstly transferred by FFT,then zoomed and corrected in frequency domain.Lastly,Signal parameters were obtained according to the symmetry of FSK modulated signal.During the system implementation and software realization,the virtual instrumentation techniques were adopted.Trial test shows that the analyzer is efficient and easy to use and all the requirements are satisfied.
【CateGory Index】: U284.28
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