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    • 4. 发明公开
    • VORRICHTUNG UND VERFAHREN ZUR QUASI-VERTEILTEN MESSUNG EINER MEßGRÖßE
    • DEVICE AND METHOD FOR准分布式测量测量的量
    • EP2564175A1
    • 2013-03-06
    • EP10759930.0
    • 2010-10-01
    • Bundesanstalt Für Materialforschung Und -Prüfung (BAM)
    • LIEHR, Sascha
    • G01L1/24G01M11/00G01D5/353G01N21/43
    • G01L1/242G01D5/35383G01M11/3172
    • The invention relates to a system for measuring at least one measured variable by means of a sensor fiber comprising a sensor fiber (110), which has one sensor (R1, R2) at each of n, n > 1, predetermined positions (z
      r ), said sensor being designed to detect at least one measured variable by means of a change of the light power reflected by the sensor, a device (120) connected to the sensor fiber (110) for carrying out an optical frequency domain reflectometry measurement, and an evaluating unit (130) connected to the device (120) for determining a measured value of the at least one measured variable, wherein the system is designed to carry out a method comprising the following steps: providing at least one sensor fiber, which has one sensor at each of n, n > 1, predetermined positions (z
      r ), wherein said sensor detects at least one measured variable by means of a change of the light power reflected by the sensor; providing a reference transfer function (H
      o , H
      r ) of the sensor fiber, wherein the reference transfer function (H
      o , H
      r ) was determined in a predetermined initial state of the sensor fiber; carrying out m > n optical frequency domain reflectometry measurements at m different measurement frequencies (f
      k ) in order to determine m measurement transfer functions (Mk); determining a change of the reflected light power at at least one sensor position using the reference transfer function (H
      o , H
      r ) and the measurement transfer functions (M
      k ); and determining at least one measured value of the measured variable at at least one sensor position using the determined change of the reflected light power at the sensor position.