公开(公告)号：US09000942B2

公开(公告)日：2015-04-07

申请号：US11598459

申请日：2006-11-13

申请人： Ian Atkinson ,  Yuehua Chen ,  Arthur Hartog ,  Franck Monmont ,  Rogerio Ramos ,  Robert Schroeder ,  Jeffrey Tarvin

发明人： Ian Atkinson ,  Yuehua Chen ,  Arthur Hartog ,  Franck Monmont ,  Rogerio Ramos ,  Robert Schroeder ,  Jeffrey Tarvin

IPC分类号： H04B13/02 ,  E21B47/12

CPC分类号： E21B47/123

摘要： A telemetry apparatus and method for communicating data from a down-hole location through a borehole to the surface is described including a light source, an optical fiber being placed along the length of the wellbore and receiving light from the light source, a transducer located such as to produce a force field (e.g. a magnetic field) across the optical fiber and its protective hull without mechanical penetration of the hull at the down-hole location, one or more sensors for measuring down-hole conditions and/or parameters, a controller to provide a modulated signal to the magnetic field generator, said modulated signal being under operating conditions representative of measurements by the one or more sensors, and an optical detector adapted to detect changes in the light intensity or polarization of light passing through the fiber.

摘要翻译： 一种遥测设备和方法，用于将数据从井下位置通过钻孔传送到表面，其包括光源，沿着井眼的长度放置的光纤并且接收来自光源的光，传感器位于 为了在整个光纤及其保护壳体上产生力场（例如磁场），而不会在井下位置机体穿透船体，一个或多个用于测量井下条件和/或参数的传感器，控制器 为了向磁场发生器提供调制信号，所述调制信号处于代表一个或多个传感器的测量值的操作条件下，以及适于检测通过光纤的光的光强度或偏振的变化的光学检测器。

公开(公告)号：US20070229816A1

公开(公告)日：2007-10-04

申请号：US10580642

申请日：2004-10-18

申请人： Yuehua Chen ,  Arthur Hartog

发明人： Yuehua Chen ,  Arthur Hartog

IPC分类号： G01K11/32 ,  G02B6/00

CPC分类号： G01K11/32

摘要： A sensing fibre for use in a distributed temperature sensing system comprises an optical fibre to be deployed in a measurement region in which a temperature measurement is to be made, which incorporates a reflective element, such as a join between portions of fibre, and a coiled fibre portion positioned adjacent a distal side of the reflective element, the coiled fibre portion contributing substantially nothing to the spatial extent of the optical fibre when deployed. In use, the effect of any forward propagating light incident on the reflective element that is returned for detection by the system, and which saturates the detector, can be eliminated by removing the part of the detected signal that corresponds to the coiled portion, after which the detector will have recovered. The remaining parts of the signal can be used to derive the distributed temperature profile since these parts represent the whole extent of the sensing fibre owing to the lack of spatial extent of the coil. Coils can be provided on both sides of the reflective element for double-ended temperature sensing techniques.

摘要翻译： 用于分布式温度感测系统的感测光纤包括一个光纤，其部署在其中将要进行温度测量的测量区域中，该测量区域包含反射元件，诸如光纤部分之间的连接和卷绕的 纤维部分邻近反射元件的远端定位，当展开时，线圈纤维部分基本上对光纤的空间范围无贡献。 在使用中，通过去除与线圈部分相对应的检测信号的一部分，可以消除入射到反射元件上的任何正向传播光对系统进行检测并使其检测器饱和的影响，之后， 检测器将恢复。 信号的其余部分可以用于导出分布式温度曲线，因为这些部分由于缺乏线圈的空间范围而代表感测光纤的整个范围。 可以在反射元件的两侧设置线圈，用于双端温度感测技术。

公开(公告)号：US20050200855A1

公开(公告)日：2005-09-15

申请号：US10514864

申请日：2003-05-13

申请人： James Mcinnes ,  Maxwell Hadley ,  Arthur Hartog ,  Yuehua Chen ,  Timothy Jeffreys

发明人： James Mcinnes ,  Maxwell Hadley ,  Arthur Hartog ,  Yuehua Chen ,  Timothy Jeffreys

IPC分类号： G01D5/353 ,  G01B9/02

CPC分类号： G01D5/35306

摘要： An apparatus for sensing data from a remote optical sensor 16 has its frequency stabilised by balancing the outputs of narrow band filter 28 30, spaced about a desired frequency 36 positioned at about the 3db down points 40 of a broad band light source 10 using voltage control, current control or temperature control to vary the frequency of the wide band light source 10. Difference between the outputs through the two narrow band filters 28 30 can be used to drive an amplifier 48 to correct the frequency of the broad band light source. The outputs through the two narrow band filters 28 30 can be converted 52 to binary numbers and fed to a microprocessor 56 which is used, via analog conversion 60, to drive the amplifier 48. The broad band light source 10 can be pulse modulated 68 to provide temporally separate light pulses 92 94 through each of the narrow band filters 28 30, measured at separate times. The corrective output to the amplifier 48 can be governed by a ratio between the outputs through the narrow band filters 28 30 rather than by a difference there between.

摘要翻译： 用于感测来自远程光学传感器16的数据的装置的频率通过平衡窄带滤波器28 30的输出而被稳定，窄带滤波器28 30的输出使用电压控制在宽带光源10的3db下降点40附近围绕期望的频率36隔开 ，电流控制或温度控制以改变宽带光源10的频率。通过两个窄带滤波器28 30的输出之间的差可以用于驱动放大器48来校正宽带光源的频率。 通过两个窄带滤波器28 30的输出可以被转换成二进制数，并被馈送到微处理器56，微处理器56经由模拟转换器60来驱动放大器48.宽带光源10可被脉冲调制68到 通过在分开的时间测量的每个窄带滤波器28 30提供时间上分离的光脉冲92 94。 放大器48的校正输出可以由通过窄带滤波器28 30的输出之间的比率来控制，而不是由它们之间的差异来控制。

公开(公告)号：US20070126594A1

公开(公告)日：2007-06-07

申请号：US11598459

申请日：2006-11-13

申请人： Ian Atkinson ,  Yuehua Chen ,  Arthur Hartog ,  Franck Monmont ,  Rogerio Ramos ,  Robert Schroeder ,  Jeffrey Tarvin

发明人： Ian Atkinson ,  Yuehua Chen ,  Arthur Hartog ,  Franck Monmont ,  Rogerio Ramos ,  Robert Schroeder ,  Jeffrey Tarvin

IPC分类号： G01V3/00

CPC分类号： E21B47/123

摘要： A telemetry apparatus and method for communicating data from a down-hole location through a borehole to the surface is described including a light source, an optical fiber being placed along the length of the wellbore and receiving light from the light source, a transducer located such as to produce a force field (e.g. a magnetic field) across the optical fiber and its protective hull without mechanical penetration of the hull at the down-hole location, one or more sensors for measuring down-hole conditions and/or parameters, a controller to provide a modulated signal to the magnetic field generator, said modulated signal being under operating conditions representative of measurements by the one or more sensors, and an optical detector adapted to detect changes in the light intensity or polarization of light passing through the fiber.

摘要翻译： 一种遥测设备和方法，用于将数据从井下位置通过钻孔传送到表面，其包括光源，沿着井眼的长度放置的光纤并且接收来自光源的光，传感器位于 为了在整个光纤及其保护壳体上产生力场（例如磁场），而不会在井下位置机体穿透船体，一个或多个用于测量井下条件和/或参数的传感器，控制器 为了向磁场发生器提供调制信号，所述调制信号处于代表一个或多个传感器的测量值的操作条件下，以及适于检测通过光纤的光的光强度或偏振的变化的光学检测器。

公开(公告)号：US20050232531A1

公开(公告)日：2005-10-20

申请号：US10514919

申请日：2003-05-13

申请人： Maxwell Hadley ,  Arthur Hartog ,  Yuehua Chen

发明人： Maxwell Hadley ,  Arthur Hartog ,  Yuehua Chen

IPC分类号： G01D5/353 ,  G02B6/00

CPC分类号： G01D5/35303 ,  G01B9/02065

摘要： A method and apparatus for receiving measurements from an interferometer transducer (22) uses a broad band light beam (19A), reflected from the transducer (22), and compares it with the amplitudes of narrow band beams, derived from the reflected broad band light beam (19A), by filters (23A-23D) on different frequencies. The narrow band light beams and the broad band light beam (19A) are measured on photo detectors (22A, 21B-21E). Microprocessor (57) compares outputs of the photo detectors to interpret phase differences between signals (25, 27, 29) from the narrow band beams. A periodically operable shutter and a single photo detector (21) can also be used. Other embodiments modulate (12) the light source (10) to produce very short broad band pulses of light (36, 40) which are reflected from the transducer (22).

摘要翻译： 用于从干涉仪换能器（22）接收测量的方法和装置使用从换能器（22）反射的宽带光束（19A），并将其与从反射的宽带导出的窄带束的幅度进行比较 光束（19A），通过滤波器（23A-23D）在不同的频率上。 在光电检测器（22A，21B-21E）上测量窄带光束和宽带光束（19A）。 微处理器（57）比较光电检测器的输出，以解释来自窄带光束的信号（25,27,29）之间的相位差。 也可以使用周期性操作的快门和单个光电检测器（21）。 其他实施例调制（12）光源（10）以产生从换能器（22）反射的非常短的宽带脉冲（36,40）。

公开(公告)号：US20110242525A1

公开(公告)日：2011-10-06

申请号：US13119231

申请日：2009-09-23

申请人： Andrew Strong ,  Gareth Lees ,  Roger Hampson ,  Kevin Williams ,  Arthur Hartog

发明人： Andrew Strong ,  Gareth Lees ,  Roger Hampson ,  Kevin Williams ,  Arthur Hartog

IPC分类号： G01N21/00

CPC分类号： G01M11/083 ,  G01M11/3154 ,  G01M11/39

摘要： An optical fiber sensor system and method for monitoring a condition of a linear structure such as a pipeline is provided which is capable of providing continuous monitoring in the event of a break in the sensing optical fiber or fibers. The system includes at least one sensing fiber provided along the length of the linear structure, and first and second interrogation and laser pumping sub-systems disposed at opposite ends of the sensing fiber, each of which includes a reflectometer. The reflectometer of the first interrogation and laser pumping sub-system is connected to one end of the sensing fiber. The reflectometer of the second interrogation and laser pumping sub-system is coupled to either (i) an end of a second sensing fiber provided along the length of the linear structure which is opposite from the one end of the first sensing fiber, or (ii) the opposite end of the first sensing fiber. Before any break of the sensing fiber or fibers occurs, each reflectometer redundantly monitors the condition of the linear structure over its entire length. After any such break occurs, each reflectometer will continue to receive signals up to the point of the break from opposite ends of the structure.

摘要翻译： 提供了一种用于监视诸如管道之类的线性结构的状态的光纤传感器系统和方法，其能够在感测光纤或光纤中断时提供连续的监视。 该系统包括沿着线性结构的长度提供的至少一个感测光纤，以及设置在感测光纤的相对端处的第一和第二询问和激光泵浦子系统，每个检测光纤包括反射计。 第一询问和激光泵送子系统的反射计连接到感测光纤的一端。 第二询问和激光泵送子系统的反射计耦合到（i）沿着与第一感测光纤的一端相对的线性结构的长度设置的第二感测光纤的端部，或者（ii ）第一感测光纤的相对端。 在发生感测纤维或纤维的任何断裂之前，每个反射计在其整个长度上冗余地监视线性结构的状态。 在发生任何这种中断之后，每个反射计将继续从结构的相对端接收到断裂点的信号。

公开(公告)号：US20060245468A1

公开(公告)日：2006-11-02

申请号：US10554116

申请日：2005-03-31

申请人： Arthur Hartog

发明人： Arthur Hartog

IPC分类号： G01K11/00

CPC分类号： G01K11/32

摘要： A method of obtaining a distributed measurement comprises deploying an optical fibre in a measurement region of interest, and launching into it a first optical signal at a first wavelength λ0 and a high power level, a second optical signal at a second wavelength λ−1, and a third optical signal at the first wavelength λ0 and a low power level. These optical signals generate backscattered light at the second wavelength λ−1 arising from Raman scattering of the first optical signal which is indicative of a parameter to be measured, at the first wavelength λ0 arising from Rayleigh scattering of the first optical signal, at the second wavelength λ−1 arising from Rayleigh scattering of the second optical signal, and at the first wavelength λ0 arising from Rayleigh scattering of the third optical signal. The backscattered light is detected to generate four output signals, and a final output signal is derived by normalising the Raman scattering signal to a function derived from the three Rayleigh scattering signals, which removes the effects of wavelength-dependent and nonlinear loss.

摘要翻译： 获得分布式测量的方法包括在感兴趣的测量区域中布置光纤，并向其中发射第一波长λ0和高功率电平的第一光信号，第二光信号 在第二波长λ1 -1和第一波长λ0的第三光信号和低功率电平。 这些光信号产生第二波长λ-1的第二波长λ1 -1的反向散射光，该第二波长λ-1由第一光信号的拉曼散射产生，该第一光信号指示待测量的参数， SUB>由第二光信号的瑞利散射产生的第二波长λ-1 -1的第一光信号的瑞利散射产生，并且在第一波长λ0 < 由第三光信号的瑞利散射引起。 检测到反向散射光以产生四个输出信号，并且通过将拉曼散射信号归一化为从三个瑞利散射信号导出的函数来导出最终输出信号，这消除了波长相关和非线性损耗的影响。

公开(公告)号：US20080316494A1

公开(公告)日：2008-12-25

申请号：US11766866

申请日：2007-06-22

申请人： Arthur Hartog ,  Kamal Kadar

发明人： Arthur Hartog ,  Kamal Kadar

IPC分类号： G01N21/47

CPC分类号： G01M11/3145

摘要： A technique includes providing an optical source signal to an optical fiber to produce a backscatter signal. A receiver is provided to detect the backscatter signal. During an acquisition period in which the backscatter signal is present, a sensitivity of the receiver is varied with respect to time to regulate an input signal range of an amplifier of the receiver.

摘要翻译： 一种技术包括向光纤提供光源信号以产生反向散射信号。 提供接收器来检测反向散射信号。 在存在后向散射信号的采集周期期间，接收机的灵敏度相对于调节接收机的放大器的输入信号范围的时间而变化。

公开(公告)号：US20060146337A1

公开(公告)日：2006-07-06

申请号：US10544270

申请日：2004-01-20

申请人： Arthur Hartog

发明人： Arthur Hartog

IPC分类号： G01B9/02

CPC分类号： G01D5/35383 ,  E21B47/065 ,  E21B47/123 ,  G01K11/32 ,  G01L1/246

摘要： A method of measuring a selected physical parameter at a location within a region of interest comprises the steps of: launching optical pulses at a plurality of reselected interrogation wavelengths into an optical fibber (1) deployed along the region of interest, reflectors (20,21,2n) being arrayed along the optical fibber (1) to form an array (9) of sensor elements, the optical path length between the said reflectors (2) being dependent upon the selected parameter; detecting the returned optical interference signal for each of the reselected wavelengths; and determining from the optical interference signal the absolute optical path length (L) between two reflectors (2) at the said location, and from the optical path length (L) so determined the value of the selected parameter at the said location; wherein the step of determining the absolute optical path length (L) comprises carrying out a process in which the phase difference between the interference signals for a pair of the reselected wavelengths is estimated using an estimated value for the optical path length (L), the estimated phase difference is used to estimate the phase at each of those wavelengths, and the phase thus obtained is used to revise the estimated value for the optical path length (L), the process being repeated for some or all remaining wavelength pairs in sequence, on the basis of the optical path length (L) estimated for the immediately preceding pair in the sequence, thereby to progressively revise the optical path length (L) until it is know to a desired level of accuracy.

摘要翻译： 一种在感兴趣区域内的位置处测量所选择的物理参数的方法包括以下步骤：将多个重新选择的询问波长的光脉冲发射到沿着感兴趣区域部署的光纤（1）中，反射器（2

公开(公告)号：US20060115204A1

公开(公告)日：2006-06-01

申请号：US11164291

申请日：2005-11-17

申请人： Richard Marsh ,  Arthur Hartog ,  Garth Naldrett ,  Vladimir Vaynshteyn

发明人： Richard Marsh ,  Arthur Hartog ,  Garth Naldrett ,  Vladimir Vaynshteyn

IPC分类号： G02B6/00

CPC分类号： E21B47/065 ,  G01K11/32 ,  G01K11/3206

摘要： The invention is an optical fiber distributed temperature sensing system comprising an opto-electronic unit and a sensing optical fiber, which system measures temperature so as to provide a temperature profile along at least part of the length of the optical fiber. The system includes reference coils, which are temperature reference points, at a location that is remote from the opto-electronic unit and closer to the region whose temperature is being measured.

摘要翻译： 本发明是一种包括光电单元和感测光纤的光纤分布式温度感测系统，该系统测量温度，以沿着光纤长度的至少一部分提供温度分布。 该系统包括作为远离光电单元并且更接近温度测量区域的位置处的温度参考点的参考线圈。