公开(公告)号：US20160245643A1

公开(公告)日：2016-08-25

申请号：US15042616

申请日：2016-02-12

申请人： ANRITSU CORPORATION

发明人： Takashi Mori

IPC分类号： G01B11/16 ,  G01K11/32

CPC分类号： G01K11/32 ,  G01B11/18 ,  G01D5/35316 ,  G01D5/35387 ,  G01K11/3206 ,  G01M11/3172

摘要： To provide an OFDR device and an OFDR method capable of measuring a large strain distribution or a large temperature distribution within a narrow measured wavelength range by using an FBG. A measured optical fiber 13 includes a plurality of gratings that is overlappingly formed in order to reflect a plurality of different wavelengths. An OFDR device 1 measures a strain distribution or a temperature distribution of the measured optical fiber 13 on the basis of the result of detection by a measuring range non-inclusion detector 26 that detects gratings of the plurality of gratings of which the reflected wavelengths are not included in the measured wavelength range from the peak wavelengths detected by a peak wavelength detector on the basis of measured wavelength range non-inclusion detecting condition data (Ds) in which a predetermined measured wavelength range is set in the direction of the axis of the peak wavelengths.

摘要翻译： 为了提供OFDR装置和OFDR方法，其能够通过使用FBG在窄的测量波长范围内测量大的应变分布或大的温度分布。 测量的光纤13包括重叠地形成以反射多个不同波长的多个光栅。 OFDR装置1基于检测反射波长不同的多个光栅的光栅的测量范围非包含检测器26的检测结果，测量被测光纤13的应变分布或温度分布 根据测量的波长范围非包含检测条件数据（Ds），包括在由峰值波长检测器检测的峰值波长的测量波长范围内，其中在峰值轴线方向上设定预定测量波长范围 波长。

公开(公告)号：US09268098B2

公开(公告)日：2016-02-23

申请号：US14296978

申请日：2014-06-05

申请人： Technobis Group B.V.

发明人： Pieter Lucas Kat

IPC分类号： G02B6/34 ,  G01B11/16 ,  G01D5/353

CPC分类号： G02B6/34 ,  G01B11/18 ,  G01D5/35316 ,  G01D5/35335 ,  G01D5/35387

摘要： A fiber Bragg grating interrogator assembly is described. Examples of the fiber Bragg grating interrogator assembly include an optical fiber including a fiber Bragg grating having a variable Bragg wavelength (λB) and a dynamic range of interest (Δλdyn,B) over which the Bragg wavelength (λB) can shift during use. The fiber Bragg grating interrogator assembly also includes a response analyzer having a spectrally selective device with an input port to which the optical fiber is operably connected, and a plurality of output ports of which each output port is associated with a respective spectral range (Δλn). The spectral ranges (Δλn, Δλn+1, Δλn+2) of each at least three successive output ports partially overlap, such that the FBG's Bragg wavelength (λB) falls inside the spectral ranges (Δλn, Δλn+1, Δλn+2) of at least three successive output ports over the dynamic range of interest (Δλdyn,B) of the FBG.

摘要翻译： 描述了光纤布拉格光栅询问器组件。 光纤布拉格光栅询问器组件的示例包括光纤，其包括具有可变布拉格波长（λB）的光纤布拉格光栅和感兴趣的动态范围（＆Dgr;λdyn，B），布拉格波长（λB）可以在使用期间移动 。 光纤布拉格光栅询问器组件还包括具有光谱选择性装置的响应分析器，其具有光纤可操作地连接的输入端口，以及多个输出端口，每个输出端口与相应的光谱范围（＆Dgr; λn）。 每个至少三个连续输出端口的光谱范围（＆Dgr;λn，＆Dgr;λn+ 1，＆Dgr;λn+ 2）部分重叠，使得FBG的布拉格波长（λB）落入光谱范围内（＆Dgr;λn， 在FBG的感兴趣的动态范围（＆Dgr;λdyn，B）上的至少三个连续输出端口的＆Dgr;λn+ 1，＆Dgr;λn+ 2）。

公开(公告)号：US20150323418A1

公开(公告)日：2015-11-12

申请号：US14646538

申请日：2013-11-22

申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST- NATUURWETENSCHAPPELIJK ONDERSOEK TNO

发明人： Lun-Kai Cheng ,  Peter Martijn Toet

IPC分类号： G01M11/00 ,  G01J3/28

CPC分类号： G01M11/30 ,  G01D5/35387 ,  G01J3/28

摘要： The invention relates to a method of interrogating a multiple number of optic sensors. The method comprises the steps of providing a multiple number of optic sensors included in a single optic path and having spectrally separated resonance spectra, and providing a single interrogation unit coupled to the single optic paths. Further, the method comprises the steps of selecting a limited number of interrogation wavelengths for each optic sensor and programming a programmable laser source, included in the single interrogation unit, in a sequence of the selected interrogation wavelengths. In addition, the method comprises the steps of interrogating the optic sensors by operating the laser source in the sequence of the selected interrogation wavelengths, and performing measurements on the programmable laser source output for correcting the interrogating step.

摘要翻译： 本发明涉及一种询问多个光学传感器的方法。 该方法包括以下步骤：提供包括在单个光学路径中并且具有频谱分离的共振光谱的多个光学传感器，以及提供耦合到单个光学路径的单个询问单元。 此外，该方法包括以下步骤：为每个光学传感器选择有限数量的询问波长，并以选定的询问波长的顺序对包含在单个询问单元中的可编程激光源进行编程。 另外，该方法包括以选择的询问波长的顺序操作激光源来询问光学传感器的步骤，以及对可编程激光源输出进行测量以校正询问步骤。

公开(公告)号：US20150055133A1

公开(公告)日：2015-02-26

申请号：US14533054

申请日：2014-11-04

申请人： Claudio Oliveira Egalon

发明人： Claudio Oliveira Egalon

IPC分类号： G01N21/25 ,  G01N21/64 ,  G01N21/76

CPC分类号： G01N21/251 ,  G01D5/353 ,  G01D5/35345 ,  G01D5/35387 ,  G01F23/2927 ,  G01N21/17 ,  G01N21/64 ,  G01N21/645 ,  G01N21/648 ,  G01N21/76 ,  G01N21/7703 ,  G01N2021/635 ,  G01N2021/6484 ,  G01N2021/7736 ,  G01N2201/06193 ,  G01N2201/062 ,  G01N2201/088 ,  G02B6/00

摘要： A side illuminated multi point multi parameter optical fiber sensor that requires no sensitive coating is provided. This sensor comprises an optical fiber having at least one removed cladding section as the sensitive region, at least one probing light source that side illuminates the fiber, a power supply, a detector, a signal processor and a display. The sensitive optical fiber is optically affected by the presence of a measurand medium that can fluoresce, phosphoresce, absorb and/or scatter the probing light. This probing light is guided by the fiber core towards a detector which measures the light intensity and this light intensity is correlated with a measurand.

摘要翻译： 提供不需要敏感涂层的侧面照明多点多参数光纤传感器。 该传感器包括具有至少一个去除的包层部分作为敏感区域的光纤，该侧面照射光纤的至少一个探测光源，电源，检测器，信号处理器和显示器。 敏感光纤受到可以荧光，磷光吸收，吸收和/或散射探测光的被测量介质的存在的光学影响。 该探测光由光纤芯引向测量光强度的检测器，该光强度与被测量相关。

公开(公告)号：US20150036134A1

公开(公告)日：2015-02-05

申请号：US14447868

申请日：2014-07-31

申请人： Takanori Saitoh ,  Hiroshi Furukawa

发明人： Takanori Saitoh ,  Hiroshi Furukawa

IPC分类号： G01N21/25 ,  G02B6/293

CPC分类号： G01N21/255 ,  G01B11/16 ,  G01D5/35316 ,  G01D5/35387 ,  G01D5/3539 ,  G01K11/3206 ,  G01L1/246 ,  G01N2201/08 ,  G02B6/2932

摘要： A physical quantity measuring system includes an optical source which emits a measurement light to fiber Bragg grating (FBG) lines containing FBGs connected in cascade by an optical fiber, an optical switch including a common port for receiving the measurement light from the optical source, and input/output ports connected to the FBG lines, the optical switch outputting the measurement light, from the common port to each of the input/output ports at different time points, a wavelength separator which receives light reflected from the respective FBGs of the FBG lines, and separating the reflected light into a plurality of component lights having predetermined wavelengths, after the measurement light is output from the input/output ports, and optical receivers which receives the component lights from the wavelength separator and detects light intensities of the component lights.

摘要翻译： 物理量测量系统包括：光源，其向包含由光纤串联连接的FBG的光纤布拉格光栅（FBG）线发射测量光;光开关，包括用于接收来自光源的测量光的公共端口;以及 连接到FBG线的输入/输出端口，光学开关将不同时间点的公共端口从公共端口输出到每个输入/输出端口;波长分离器，其接收从FBG线的各个FBG反射的光 并且在从输入/输出端口输出测量光和从波长分离器接收分量光的光接收器之后，将反射光分离成具有预定波长的多个分量光，并检测分量光的光强度。

公开(公告)号：US20140245588A1

公开(公告)日：2014-09-04

申请号：US14275517

申请日：2014-05-12

申请人： Weatherford/Lamb, Inc.

发明人： Trevor MACDOUGALL ,  John J. GRUNBECK ,  James R. DUNPHY ,  Domino TAVERNER ,  Guy A. DAIGLE ,  Richard T. JONES ,  Milton E. IVES, JR.

IPC分类号： G01K11/32 ,  E21B47/06

CPC分类号： G01K11/3206 ,  E21B47/065 ,  E21B47/123 ,  G01D5/35303 ,  G01D5/35316 ,  G01D5/35354 ,  G01D5/35387 ,  G01K1/026 ,  Y10T29/49826

摘要： Methods and apparatus enable monitoring conditions in a well-bore using multiple cane-based sensors. The apparatus includes an array of cane-based Bragg grating sensors located in a single conduit for use in the well-bore. For some embodiments, each sensor is located at a different linear location along the conduit allowing for increased monitoring locations along the conduit.

摘要翻译： 方法和设备可以使用多个基于手杖的传感器监测井眼状况。 该装置包括位于用于井眼的单个管道中的基于甘蔗的布拉格光栅传感器阵列。 对于一些实施例，每个传感器沿着导管位于不同的线性位置，允许沿导管增加监测位置。

公开(公告)号：US20140239166A1

公开(公告)日：2014-08-28

申请号：US14347976

申请日：2012-09-19

申请人： VESTAS WIND SYSTEMS A/S

发明人： Thomas Hjort ,  Lars Glavind

IPC分类号： G01D5/353

CPC分类号： G01D5/3537 ,  G01D5/35303 ,  G01D5/35316 ,  G01D5/35341 ,  G01D5/35387 ,  G01K11/3206 ,  G01L1/246 ,  G01M5/0016 ,  G01M5/0091 ,  G01M11/083

摘要： The present invention relates to an optical fibre for a fibre optic sensor, comprising a first optical grating adapted to operate over a first range of wavelengths; and at least one set of further gratings adapted to operate over a second range of wavelengths, each grating being adapted to operate over a portion of the second range; wherein, each grating within said set has an operating range that partially overlaps with at least one other such grating operating range. The invention also extends to a sensor system, and method, using such an optical fibre.

摘要翻译： 本发明涉及一种用于光纤传感器的光纤，包括适于在第一波长范围上工作的第一光栅; 以及适于在第二波长范围上操作的至少一组另外的光栅，每个光栅适于在所述第二范围的一部分上操作; 其中，所述组内的每个光栅具有与至少一个其它此类光栅工作范围部分重叠的工作范围。 本发明还延伸到使用这种光纤的传感器系统和方法。

公开(公告)号：US08797541B2

公开(公告)日：2014-08-05

申请号：US13180059

申请日：2011-07-11

申请人： Roger Glen Duncan ,  Brooks A. Childers

发明人： Roger Glen Duncan ,  Brooks A. Childers

IPC分类号： G01B9/02

CPC分类号： G01D5/35387 ,  G01D5/35367 ,  G01D5/35374

摘要： A method, apparatus and optical network for obtaining a signal from a sensor in a fiber optic cable at a downhole location is disclosed. A reference signal is propagated through the fiber optic cable. A beam of light is received from the fiber optic cable, wherein the beam of light includes the propagated reference signal and the signal from the sensor generated from an interaction of the sensor and the reference signal. The propagated reference signal is obtained from the received beam of light. The signal from the sensors is obtained by sampling the received beam of light using the obtained propagated reference signal.

摘要翻译： 公开了一种用于从位于井下位置处的光纤电缆中的传感器获得信号的方法，装置和光网络。 参考信号通过光纤传播。 从光纤电缆接收光束，其中光束包括传播的参考信号和来自传感器与参考信号的相互作用产生的来自传感器的信号。 从所接收的光束获得传播的参考信号。 通过使用获得的传播参考信号对接收的光束进行采样来获得来自传感器的信号。

公开(公告)号：US20140047926A1

公开(公告)日：2014-02-20

申请号：US13585888

申请日：2012-08-15

申请人： Evangelos V. Diatzikis ,  Jonathan R. Anderson ,  David A. Reed

发明人： Evangelos V. Diatzikis ,  Jonathan R. Anderson ,  David A. Reed

IPC分类号： G01L1/24

CPC分类号： G01D5/353 ,  G01B11/16 ,  G01D5/35316 ,  G01D5/35387 ,  G01L1/246 ,  G01M11/083 ,  G02B6/02085 ,  G02B6/022

摘要： A fiber Bragg grating (FBG) based sensor is used as a strain sensing element to determine frame foot loading of a generator. Three FBGs may be used in tandem to form a basic Frame Foot Loading Module (FFL Module). Two modules are fixed on each vertical support gusset at the corner of the generator frame, with one module on the front of the gusset and a second module on the back of the gusset. Thus, each gusset may be instrumented with six FBG strain gauges or sensors. The gussets are chosen on each of the four corners of the generator. For two-pole generators the first three gussets at each corner may be used and, for four-pole generators the first four gussets may be used.

摘要翻译： 使用基于光纤布拉格光栅（FBG）的传感器作为应变传感元件来确定发电机的脚架负载。 可以串联使用三个FBG来形成基本的框架脚加载模块（FFL Module）。 两个模块固定在发电机框架拐角处的每个垂直支撑角撑板上，一个模块位于角撑板的前部，另一个模块位于角撑板背面。 因此，每个角撑板可以装配有六个FBG应变计或传感器。 在发生器的四个角落中选择角撑板。 对于两极发生器，可以使用每个拐角处的前三个角撑板，对于四极发生器，可以使用前四个角撑板。

公开(公告)号：US20130025374A1

公开(公告)日：2013-01-31

申请号：US13411390

申请日：2012-03-02

申请人： Asher Voskoboinik ,  Alan E. Willner ,  Moshe Tur

发明人： Asher Voskoboinik ,  Alan E. Willner ,  Moshe Tur

IPC分类号： G01D5/32

CPC分类号： G01D5/35364 ,  G01D5/35303 ,  G01D5/35387

摘要： Methods and systems used to perform sweep-free stimulated Brillouin scattering-based fiber optical sensing are described. In one aspect, a method includes interrogating different parts of a Brillouin gain spectrum using multiple optical tones in an optical fiber. The interrogating includes sending at least two pump tones into the optical fiber from one end of the optical fiber, such that a frequency spacing between the pump tones is larger than a width of the Brillouin gain spectrum. The interrogating also includes sending at least two probe tones into the optical fiber from another end of the optical fiber, such that a frequency spacing between the probe tones is different from the frequency spacing between the pump tones. The method further includes generating a sensing output based on the interrogating.

摘要翻译： 描述了用于执行无扫描受激布里渊散射的光纤传感的方法和系统。 在一个方面，一种方法包括使用光纤中的多个光学色调来询问布里渊增益谱的不同部分。 询问包括从光纤的一端发送至少两个泵浦音调到光纤中，使得泵浦频率之间的频率间隔大于布里渊增益频谱的宽度。 询问还包括从光纤的另一端发送至少两个探测音调到光纤中，使得探测音之间的频率间隔与泵音之间的频率间隔不同。 该方法还包括基于询问产生感测输出。