A clear current threshold for a track circuit is defined as a current above which a section of track is considered to be unoccupied. When a train moves along a track the current is shorted out by the train axles indicating the track is occupied. During periods of precipitation the current is reduced from a normal baseline even when the track is unoccupied which can lead to false alarms. The method includes receiving weather data for the vicinity of the track, possibly from a simple rain gauge or online data; and based on the weather data a clear current threshold is selected. Raw current data may be received over a period of time such as 10 days as shown in fig.9A and filtered to exclude those times that the track was occupied, as shown in fig.9B, to produce a clear current threshold. During periods of precipitation, fig.9C, the filtered threshold may fall below the level at which the track is considered occupied, even when it is not, so the threshold may be lowered, as shown at 901 and 903, to avoid false positives. The threshold may also be modified to take account of a drying track.


    Access

    Download


    Export, share and cite



    Title :

    Methods for selecting a clear current threshold for a railway track circuit


    Contributors:

    Publication date :

    2017-09-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC



    Methods for selecting a clear current threshold for a railway track circuit

    ANDREW PETER MYERS / CHRISTOPHER HARDING | European Patent Office | 2017

    Free access

    Selecting optimum railway track using GIS techniques

    Al-Hameedawi Amjed / Salih Mohammed / Mohammed Haidar et al. | DOAJ | 2018

    Free access

    RAILWAY TRACK CIRCUIT MONITOR

    FOX SIMON WILLIAM | European Patent Office | 2018

    Free access

    RAILWAY TRACK CIRCUIT SHUNT ENCLOSURE

    SAGE DEVIN STEVEN / IBARRA MARCO ANTONIO / PENA ANGEL GUSTAVO CERECERES | European Patent Office | 2023

    Free access