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    Controlling a dynamic signal range in an optical time domain reflectometry
    11.
    发明授权
    Controlling a dynamic signal range in an optical time domain reflectometry 失效
    在光时域反射测量中控制动态信号范围

    公开(公告)号：US07586617B2

    公开(公告)日：2009-09-08

    申请号：US11766866

    申请日：2007-06-22

    Applicant: Arthur Hartog ,  Kamal Kadar

    Inventor： Arthur Hartog ,  Kamal Kadar

    IPC: G01N21/47 ,  G01N21/55

    CPC classification number: G01M11/3145

    Abstract: 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.

    Abstract translation: 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。

    Apparatus and Methods for Distributed Temperature Sensing
    12.
    发明申请
    Apparatus and Methods for Distributed Temperature Sensing 有权
    分布式温度传感装置与方法

    公开(公告)号：US20070229816A1

    公开(公告)日：2007-10-04

    申请号：US10580642

    申请日：2004-10-18

    Applicant: Yuehua Chen ,  Arthur Hartog

    Inventor： Yuehua Chen ,  Arthur Hartog

    IPC: G01K11/32 ,  G02B6/00

    CPC classification number: G01K11/32

    Abstract: 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.

    Abstract translation: 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。

    DISTRIBUTED FIBRE OPTIC DIAGNOSIS OF RISER INTEGRITY
    14.
    发明申请
    DISTRIBUTED FIBRE OPTIC DIAGNOSIS OF RISER INTEGRITY 审中-公开
    分布式光纤诊断更高级的完整性

    公开(公告)号：US20120179390A1

    公开(公告)日：2012-07-12

    申请号：US13120432

    申请日：2009-09-23

    Applicant: Stephen Kimmiau ,  Arthur Hartog ,  Gareth Lee ,  Azedine Kacher

    Inventor： Stephen Kimmiau ,  Arthur Hartog ,  Gareth Lee ,  Azedine Kacher

    IPC: G06F19/00 ,  G06F15/00

    CPC classification number: G01M5/0025 ,  E21B47/0001 ,  G01M5/0033 ,  G01M5/0091 ,  G01M11/085

    Abstract: A subsea riser integrity diagnosis system comprising: one or more fibres deployed along a riser, preferably along the whole length subject to any potential failure, or alternatively deployed over the interval most subject to failure, a fibre optic sensor interrogation apparatus optically coupled to the fibre(s) and operable to detect changes in temperature (DTS), vibration (CRN), or strain (FBG) sensed by the fibre optic strain sensor, and a central processor means adapted to receive multiple measurement data from the interrogation apparatus and operable to determine from the received data the current status of temperature, pressure, vibration, strain or other parameters along the riser and to determine if the status is within safe limits or whether any number of potentially damaging events has occurred and to inform the operator(s) for possible action to be taken to safeguard the integrity of the riser.

    Abstract translation: 一种海底提升机完整性诊断系统，包括：一个或多个沿着提升管布置的纤维，优选地沿着整个长度受到任何潜在故障的部署，或者替代地部署在大多数受到故障的间隔上的光纤传感器询问设备，光纤耦合到光纤 并且可操作以检测由光纤应变传感器检测的温度变化（DTS），振动（CRN）或应变（FBG）;以及适于从询问装置接收多个测量数据的中央处理器装置， 从接收到的数据中确定沿着提升管的温度，压力，振动，应变或其他参数的当前状态，并确定状态是否在安全限制内，或者是否发生了任何数量的潜在的有害事件并通知操作者 采取可行措施来维护冒口的完整性。

    Borehole telemetry system
    16.
    发明申请
    Borehole telemetry system 有权
    井眼遥测系统

    公开(公告)号：US20070126594A1

    公开(公告)日：2007-06-07

    申请号：US11598459

    申请日：2006-11-13

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

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

    IPC: G01V3/00

    CPC classification number: E21B47/123

    Abstract: 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.

    Abstract translation: 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。

    Fibre-optic interferometric remote sensor
    17.
    发明申请
    Fibre-optic interferometric remote sensor 有权
    光纤干涉式遥感器

    公开(公告)号：US20050232531A1

    公开(公告)日：2005-10-20

    申请号：US10514919

    申请日：2003-05-13

    Applicant: Maxwell Hadley ,  Arthur Hartog ,  Yuehua Chen

    Inventor： Maxwell Hadley ,  Arthur Hartog ,  Yuehua Chen

    IPC: G01D5/353 ,  G02B6/00

    CPC classification number: G01D5/35303 ,  G01B9/02065

    Abstract: 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).

    Abstract translation: 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）。

    Optical time domain reflectometry
    18.
    发明申请
    Optical time domain reflectometry 有权
    光时域反射

    公开(公告)号：US20050117830A1

    公开(公告)日：2005-06-02

    申请号：US10502616

    申请日：2003-01-30

    Applicant: Arthur Hartog ,  Peter Wait

    Inventor： Arthur Hartog ,  Peter Wait

    IPC: G01M11/00 ,  H04B10/071 ,  G02B6/00

    CPC classification number: G01M11/319 ,  G01M11/3109 ,  H04B10/071

    Abstract: An optical time domain reflectometry method of sensing a parameter to be measured in a region of interest comprises launching optical radiation (4) at a probe wavelength into an optical fibre (5, 6) and producing electrical output signals in response to optical radiation backscattered from the optical fibre (5, 6). In one aspect of the invention the optical fibre comprises first and second sections (5, 6), the second section (6) having a lower intensity threshold for the onset of non-linear effects than the first section (5) and being deployed in the region of interest. Optical radiation (4) at the probe wavelength is launched into the said first section (5) at an intensity lower than the non-linear effects intensity threshold of the first section (5) but higher than the non-linear effects intensity threshold of the second section (6), the attenuation characteristics of the said first section (5) being chosen so that the intensity of the optical radiation (4) at the probe wavelength reaching the second section (6) is below that of the non-linear effects intensity threshold of the said second section (6). In another aspect of the invention the optical fibre comprises first and second sections connected together by a remote amplifier, the gain of the amplifier being selected so as to compensate for attenuation losses in the probe wavelength in the first section.

    Abstract translation: 用于感测在感兴趣区域中要测量的参数的光学时域反射测量方法包括将探测波长的光学辐射（4）发射到光纤（5,6）中，并且响应于从背面散射的光学辐射产生电输出信号 光纤（5,6）。 在本发明的一个方面，光纤包括第一和第二部分（5,6），第二部分（6）具有比第一部分（5）开始非线性效应的较低强度阈值，并且部署在 感兴趣的区域 探测波长的光辐射（4）以比第一部分（5）的非线性效应强度阈值低的强度被发射到所述第一部分（5）中，但是高于第一部分（5）的非线性效应强度阈值 第二部分（6），所述第一部分（5）的衰减特性被选择为使得到达第二部分（6）的探针波长处的光辐射（4）的强度低于非线性效应 所述第二部分（6）的强度阈值。 在本发明的另一方面，光纤包括由远程放大器连接在一起的第一和第二部分，选择放大器的增益以补偿第一部分中探针波长的衰减损耗。

    Redundant optical fiber system and method for remotely monitoring the condition of a pipeline
    19.
    发明授权
    Redundant optical fiber system and method for remotely monitoring the condition of a pipeline 有权

    公开(公告)号：US09784642B2

    公开(公告)日：2017-10-10

    申请号：US13119231

    申请日：2009-09-23

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

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

    IPC: G01N21/55 ,  G01M11/08 ,  G01M11/00

    CPC classification number: G01M11/083 ,  G01M11/3154 ,  G01M11/39

    Abstract: 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.

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