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1.发明申请公开(公告)号：US20150100279A1
公开(公告)日：2015-04-09
申请号：US14510537
申请日：2014-10-09
Applicant: Optoplan AS
Inventor： Erlend RONNEKLEIV , Ole Henrik Waagaard
CPC classification number: G01B9/02075 , G01B9/02056 , G01B9/0207 , G01D5/35335 , G01D5/35387 , G01D5/3539 , G01H9/004 , G01V1/186
Abstract: A method of processing data from a distributed fibre-optic interferometric sensor system for measuring a measurand, the system comprising multiple interferometric sensors. The method comprises interrogating two or more of the multiple interferometric sensors to record a raw measurement time series for each of the sensors. The method further comprises calculating a common reference time series as a measure of central tendency of the raw measurement time series from two or more reference sensors, the reference sensors being selected from the multiple interferometric sensors. Finally, the method comprises compensating at least one raw measurement time series from a measurement sensor selected from the multiple interferometric sensors with the common reference time series to produce a compensated measurement time series, the measurement sensor being configured to be sensitive to the measurand. The invention further relates to a distributed fibre-optic interferometric sensor system.
Abstract translation: 一种从用于测量被测量的分布式光纤干涉测量传感器系统处理数据的方法，所述系统包括多个干涉测量传感器。 该方法包括询问多个干涉测量传感器中的两个或更多个以记录每个传感器的原始测量时间序列。 该方法还包括计算公共参考时间序列作为来自两个或更多个参考传感器的原始测量时间序列的集中趋势的度量，参考传感器从多个干涉测量传感器中选择。 最后，该方法包括从具有公共参考时间序列的多个干涉测量传感器中选择的测量传感器补偿至少一个原始测量时间序列，以产生经补偿的测量时间序列，测量传感器被配置为对被测量敏感。 本发明还涉及分布式光纤干涉测量传感器系统。
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公开(公告)号：US20180188077A1
公开(公告)日：2018-07-05
申请号：US15306832
申请日：2015-04-28
Applicant: OPTOPLAN AS
Inventor： Erlend Ronnekleiv , Ole Henrik Waagaard
CPC classification number: G01D5/266 , G01B9/02 , G01B2290/70 , G01D5/268
Abstract: The invention relates to a method of interrogating an interferometric optical fibre sensor system including a laser source configured to generate interrogation light and a sensor array with at least a first reflector and a second reflector. The method includes continuously and repeatedly frequency sweeping the interrogation light from the laser source within a sweep bandwidth (SWB) over a sweep duration (tsw) with a substantially constant sweep rate r=SBW/tsw to produce a swept interrogation light signal, launching the swept interrogation light signal is launched into the sensor array, detecting reflected signals being returned from the sensor array by each of the reflectors, respectively, wherein detection includes mixing a return light signal from the sensor array with a local oscillator signal onto an optical receiver to produce an electrical radio frequency signal, demultiplexing the electrical radio frequency signal into a first signal channel and a second signal channel, corresponding to the first and second reflector, respectively, demodulating each of the first and second signal channel into a first phase response from the first reflector and a second phase response from the second reflector, and subtracting the first phase response from the second phase response to obtain a sensor phase signal.
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公开(公告)号：US10247581B2
公开(公告)日：2019-04-02
申请号：US15306832
申请日：2015-04-28
Applicant: OPTOPLAN AS
Inventor： Erlend Ronnekleiv , Ole Henrik Waagaard
Abstract: The invention relates to a method of interrogating an interferometric optical fiber sensor system including a laser source configured to generate interrogation light and a sensor array with at least a first reflector and a second reflector. The method includes continuously and repeatedly frequency sweeping the interrogation light from the laser source within a sweep bandwidth (SWB) over a sweep duration (tsw) with a substantially constant sweep rate r=SBW/tsw to produce a swept interrogation light signal, launching the swept interrogation light signal into the sensor array, detecting reflected signals being returned from the sensor array by each of the reflectors, respectively, wherein detection includes mixing a return light signal from the sensor array with a local oscillator signal onto an optical receiver to produce an electrical radio frequency signal, demultiplexing the electrical radio frequency signal into a first signal channel and a second signal channel, corresponding to the first and second reflector, respectively, demodulating each of the first and second signal channel into a first phase response from the first reflector and a second phase response from the second reflector, and subtracting the first phase response from the second phase response to obtain a sensor phase signal.
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公开(公告)号：US10001362B2
公开(公告)日：2018-06-19
申请号：US14510537
申请日：2014-10-09
Applicant: Optoplan AS
Inventor： Erlend Ronnekleiv , Ole Henrik Waagaard
CPC classification number: G01B9/02075 , G01B9/02056 , G01B9/0207 , G01D5/35335 , G01D5/35387 , G01D5/3539 , G01H9/004 , G01V1/186
Abstract: A method of processing data from a distributed fibre-optic interferometric sensor system for measuring a measurand, the system comprising multiple interferometric sensors. The method comprises interrogating two or more of the multiple interferometric sensors to record a raw measurement time series for each of the sensors. The method further comprises calculating a common reference time series as a measure of central tendency of the raw measurement time series from two or more reference sensors, the reference sensors being selected from the multiple interferometric sensors. Finally, the method comprises compensating at least one raw measurement time series from a measurement sensor selected from the multiple interferometric sensors with the common reference time series to produce a compensated measurement time series, the measurement sensor being configured to be sensitive to the measurand. The invention further relates to a distributed fibre-optic interferometric sensor system.
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