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1.发明公开AN OVERLAPPED CHIRPED FIBER BRAGG GRATING SENSING FIBER AND METHODS AND APPARATUS FOR PARAMETER MEASUREMENT USING SAME 审中-公开重叠的纤维和方法及装置，以便测量参数布拉格格子捕获纤维
公开(公告)号：EP3008425A4
公开(公告)日：2017-02-01
申请号：EP14810406
申请日：2014-06-10
发明人： FROGGATT MARK E , KLEIN JUSTIN W
CPC分类号： G01B9/02002 , G01B9/02004 , G01B9/02044 , G01B11/161 , G01B11/18 , G01D5/35316 , G01M11/3172 , G02B6/02042 , G02B6/02085 , G02B6/02114 , G02B6/02123 , G02B2006/02157
摘要： An optical sensor includes an optical fiber inscribed with a repeated refraction pattern such that light scattered from a location on the optical fiber is scattered at multiple frequencies in a range of frequencies. The inscribed patterns overlap at every measurement point along at least a portion of the length of the sensor. An optical sensing system including control circuitry coupled to the optical fiber detects measurement scatter data from the optical fiber over the range of frequencies, determines a change in the detected measurement scatter data over the range of frequencies, and extracts a parameter describing a state of the optical fiber from the determined change in the detected measurement scatter data. The sensor may be made by inscribing a first light refracting pattern on the optical fiber at every measurement point along at least a portion of the length of the sensor and inscribing a second light refracting pattern on the optical fiber that overlaps the first inscribed light refracting pattern at every measurement point along at least that portion of the length of the sensor.
摘要翻译： 一种光学传感器包括在光纤与重复图案折射寻求的是从轻微在光纤上的位置散射的在一定频率范围内的散射在多个频率处刻。 内切图案在沿着传感器的长度的至少一部分上的每个测量点重叠。 光学传感系统，其包括耦合到所述光纤控制电路从光纤上的频率范围检测测量散射数据，bestimmt在超过频率范围内所检测到的测量散射数据的变化，并且提取的参数描述的一个状态 光纤从所检测到的测量数据分散确定性开采变化。 传感器可以通过在每一个测量点沿着传感器的长度的至少一部分上刻印上该光纤的第一光折射图案和在光纤内接的第二光折射图案那样进行重叠第一内切光折射图案 在沿每个测量点的至少做了传感器的长度的部分。
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2.发明公开INTERFEROMETRIC MEASUREMENT WITH CROSSTALK SUPPRESSION 审中-公开INTERFEROMETRISCHE MESSUNG MITÜBERSPRECHUNGS-UNTERDRÜCKUNG
公开(公告)号：EP2577221A4
公开(公告)日：2017-07-05
申请号：EP11790200
申请日：2011-05-23
发明人： FROGGATT MARK E , KLEIN JUSTIN W
CPC分类号： G01B9/02027 , G01B9/02004 , G01B9/02056 , G01B11/161 , G01B11/18 , G01B2290/45 , G01D5/35309 , G01D5/3538
摘要： An interferometric measurement system suppresses cross talk between optical waveguides used to measure one or more parameters. A first interferometric measurement channel coupled to a first waveguide, and a second interferometric measurement channel coupled to a second waveguide. At least one of the channels includes a reference light path in addition to the first and second waveguides. A reference path optical delay is associated with the reference light path, a first optical delay is associated with the input portion of at least one of the first and second interferometric measurement channels, and a second optical delay is associated with an output portion of the one interferometric measurement channel. A value of the first optical delay and a value the second optical delay are chosen to suppress crosstalk associated with the other of the first and second interferometric measurement channels in the one interferometric measurement channel over a predetermined length of the first waveguide. Signals corresponding to the reference light path and the first and second interferometric measurement channels are processed to measure one or more parameters.
摘要翻译： 干涉测量系统抑制用于测量一个或多个参数的光波导之间的串扰。 耦合到第一波导的第一干涉测量信道以及耦合到第二波导的第二干涉测量信道。 除了第一和第二波导之外，至少一个通道还包括参考光路。 参考路径光学延迟与参考光路相关联，第一光学延迟与第一和第二干涉测量信道中的至少一个的输入部分相关联，并且第二光学延迟与一个光学延迟的输出部分相关联 干涉测量通道。 选择第一光学延迟的值和第二光学延迟的值以在第一波导的预定长度上抑制与一个干涉测量信道中的第一和第二干涉测量信道中的另一个干涉测量信道相关联的串扰。 处理对应于参考光路和第一和第二干涉测量通道的信号以测量一个或多个参数。
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3.发明公开REGISTRATION OF AN EXTENDED REFERENCE FOR PARAMETER MEASUREMENT IN AN OPTICAL SENSING SYSTEM 审中-公开注册EINER ERWEITERTEN REFERENZ ZUR PARAMETERMESSUNG在EINEM OPTISCHEN ERFASSUNGSSYSTEM
公开(公告)号：EP2577222A4
公开(公告)日：2017-06-28
申请号：EP11790271
申请日：2011-05-31
发明人： FROGGATT MARK E , KLEIN JUSTIN W , GIFFORD DAWN K , REAVES MATTHEW , BOS JOSEPH J , SANG ALEXANDER K
CPC分类号： G01B9/02088 , G01B9/02004 , G01B9/02023 , G01B9/02069 , G01B9/02084 , G01B11/161 , G01D5/35361 , G01L1/242
摘要： An interferometric measurement system measures a parameter using at least one optical waveguide. A memory stores reference interferometric pattern data associated with a segment of the optical waveguide. Interferometric detection circuitry detects and stores measurement interferometric pattern data associated with the segment of the optical waveguide during a measurement operation. A spectral range of the reference interferometric pattern of the optical waveguide is greater than a spectral range of the measurement interferometric pattern of the optical waveguide. A processor shifts one or both of the measurement interferometric pattern data and the reference interferometric pattern data relative to the other to obtain a match and to use the match to measure the parameter. An example parameter is strain.
摘要翻译： 干涉测量系统使用至少一个光波导来测量参数。 存储器存储与光波导的一段相关联的参考干涉图案数据。 干涉检测电路在测量操作期间检测并存储与光波导的段相关联的测量干涉图案数据。 光波导的参考干涉图案的光谱范围大于光波导的测量干涉图案的光谱范围。 处理器将测量干涉图案数据和参考干涉图案数据中的一者或两者相对于另一者移位以获得匹配并且使用匹配来测量参数。 示例参数是应变。
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4.发明公开METHOD AND APPARATUS FOR MOTION COMPENSATION IN INTERFEROMETRIC SENSING SYSTEMS 有权VERFAHREN UND VORRICHTUNGFÜRBEWEGUNGSAUSGLEICH IN INTERFEROMETRISCHEN MESSSYSTEMEN
公开(公告)号：EP2795242A4
公开(公告)日：2015-08-05
申请号：EP12855449
申请日：2012-12-03
CPC分类号： G01B9/0207 , G01B9/02004 , G01B9/02069 , G01B9/02072 , G01B9/02076 , G01B9/02083 , G01B9/0209 , G01B11/0658 , G01D5/3537 , G01L1/242
摘要： An optical interrogation system, e.g., an OFDR-based system, measures local changes, of index of refraction of a sensing light guide subjected to a time-varying disturbance. Interferometric measurement signals detected for a length of the sensing light guide are transformed into the spectral domain. A time varying signal is determined from the transformed interferometric measurement data set. A compensating signal is determined from the time varying signal which is used to compensate the interferometric measurement data set for the time-varying disturbance. Further robustness is achieved using averaging and strain compensation. The compensation technique may be applied along the length of the light guide.
摘要翻译： 光学询问系统，例如基于OFDR的系统，测量经历时变干扰的感测光导的折射率的局部变化。 在感测光导的长度上检测到的干涉测量信号被转换成光谱域。 从变换的干涉测量数据集确定时变信号。 根据用于补偿时变干扰的干涉测量数据集的时变信号来确定补偿信号。 使用平均和应变补偿实现进一步的鲁棒性。 可以沿着光导的长度应用补偿技术。
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公开(公告)号：EP2478331A4
公开(公告)日：2017-06-28
申请号：EP10817557
申请日：2010-09-16
CPC分类号： G01B11/24 , G01B11/16 , G01B11/168 , G01B11/18 , G01L1/242 , G01L1/246 , G02B6/02042
摘要： An accurate measurement method and apparatus are disclosed for shape sensing with a multi-core fiber. A change in optical length is detected in ones of the cores in the multi-core fiber up to a point on the multi-core fiber. A location and/or a pointing direction are/is determined at the point on the multi-core fiber based on the detected changes in optical length. The accuracy of the determination is better than 0.5% of the optical length of the multi-core fiber up to the point on the multi-core fiber. In a preferred example embodiment, the determining includes determining a shape of at least a portion of the multi-core fiber based on the detected changes in optical length.
摘要翻译： 公开了用于多芯光纤的形状感测的精确测量方法和设备。 光纤长度的变化在多芯光纤中的一些芯中检测到多芯光纤上的一个点。 基于检测到的光学长度的变化，在多芯光纤上的点处确定位置和/或指向方向。 确定的准确度优于多芯光纤的光学长度的0.5％，直到多芯光纤上的点为止。 在优选示例实施例中，该确定包括基于检测到的光学长度的变化来确定多芯光纤的至少一部分的形状。
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6.发明公开COMPENSATING FOR NON-IDEAL MULTI-CORE OPTICAL FIBER STRUCTURE 审中-公开KOMPENSATION EINER NICHT IDEALEN MEHRKERN-GLASFASERSTRUKTUR
公开(公告)号：EP2616783A4
公开(公告)日：2017-06-21
申请号：EP11825919
申请日：2011-09-15
CPC分类号： G01B11/161 , G01B9/02023 , G01B11/18 , G01B21/042 , G01B21/045 , G02B6/02042
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公开(公告)号：EP2936048A4
公开(公告)日：2016-08-03
申请号：EP13867656
申请日：2013-12-24
CPC分类号： G01M11/3145 , G01B9/0207 , G01D5/35358 , G01D5/35393
摘要： An optical frequency domain reflectometry (OFDR) measurement is produced from an OFDR apparatus that includes a tunable laser source coupled to a sensing interferometer and a monitor interferometer. The sensing interferometer is also coupled to a waveguide, e.g., an optical sensing fiber. Sensor interferometric data obtained by the OFDR measurement is processed in the spectral domain (e.g., frequency) with one or more parameters to compensate for the optical dispersion associated with the sensing interferometer data. A Fourier Transform of the dispersion-compensated sensing interferometric data in the spectral domain is performed to provide a dispersion-compensated OFDR measurement information in the temporal (e.g., time) domain.
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