A fibre sensing apparatus (100) comprises an interrogation unit (104) to interrogate a sensing fibre with optical radiation, and to detect an optical signal returned from the fibre, and processing circuitry (114). A portion of the fibre may be excited with a test signal. The processing circuitry comprises an assessment module (115) to analyse the optical signal returned from the excited portion of fibre, and to determine at least one operational characteristic of the apparatus based on the detected optical signal.


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    Title :

    OPTICAL FIBRE SENSING


    Additional title:

    GLASFASERSENSORIK
    DÉTECTION À FIBRE OPTIQUE


    Contributors:

    Publication date :

    2017-12-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen / B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / G01V Geophysik , GEOPHYSICS



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