-
公开(公告)号：US07292345B2
公开(公告)日：2007-11-06
申请号：US10514919
申请日：2003-05-13
申请人： Maxwell R. Hadley , Arthur H. Hartog , Yuehua Chen
发明人： Maxwell R. Hadley , Arthur H. Hartog , Yuehua Chen
IPC分类号： G01B9/02
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：US07251038B2
公开(公告)日：2007-07-31
申请号：US10514864
申请日：2003-05-13
IPC分类号： 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 3 db 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的输出使用位于宽带光源10的大约3db下降点40的期望频率36 控制，电流控制或温度控制来改变宽带光源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60被使用以驱动放大器48。 宽带光源10可以被脉冲调制68，以通过在分开的时间测量的每个窄带滤光器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：US20100092176A1
公开(公告)日：2010-04-15
申请号：US12578652
申请日：2009-10-14
摘要： To provide a polarization-diverse, heterodyne optical receiving system, a light signal is transmitted into an optical fiber having a plurality of optical sensors that are distinguishable using a multiplexing arrangement. A return light signal from the optical fiber is mixed with an optical local oscillator light signal, where the mixing outputs plural output signal portions having different polarizations. A birefringence of a particular optical sensor is determined based on the plural signal portions.
摘要翻译： 为了提供偏振多样化的外差光接收系统，光信号被传输到具有使用多路复用装置可区分的多个光学传感器的光纤中。 来自光纤的返回光信号与光学本地振荡器光信号混合，其中混合输出具有不同偏振的多个输出信号部分。 基于多个信号部分确定特定光学传感器的双折射。
-
公开(公告)号：US08401401B2
公开(公告)日：2013-03-19
申请号：US12578652
申请日：2009-10-14
IPC分类号： H04B10/06
摘要： To provide a polarization-diverse, heterodyne optical receiving system, a light signal is transmitted into an optical fiber having a plurality of optical sensors that are distinguishable using a multiplexing arrangement. A return light signal from the optical fiber is mixed with an optical local oscillator light signal, where the mixing outputs plural output signal portions having different polarizations. A birefringence of a particular optical sensor is determined based on the plural signal portions.
摘要翻译： 为了提供偏振多样化的外差光接收系统，光信号被传输到具有使用多路复用装置可区分的多个光学传感器的光纤中。 来自光纤的返回光信号与光学本地振荡器光信号混合，其中混合输出具有不同偏振的多个输出信号部分。 基于多个信号部分确定特定光学传感器的双折射。
-
公开(公告)号：US07412117B2
公开(公告)日：2008-08-12
申请号：US10580642
申请日：2004-10-18
申请人： Yuehua Chen , Arthur H. Hartog
发明人： Yuehua Chen , Arthur H. Hartog
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：US08989526B2
公开(公告)日：2015-03-24
申请号：US12375306
申请日：2007-07-12
申请人： Arthur H. Hartog
发明人： Arthur H. Hartog
CPC分类号： G01D5/353 , G01D5/35364 , G01D5/35383 , G01M11/319 , G01N2021/638 , H01S3/06754 , H01S3/094076 , H01S3/302 , H04B10/2916
摘要： A method of providing Raman amplification in an optical fiber sensing system, comprises generating a probe pulse of light and launching the pulse into a sensing optical fiber, generating pump light at a shorter wavelength and modulating it to produce a time-varying intensity profile, and launching the pump light into the sensing fiber. such that the intensity of the launched pump light during launch of the probe pulse is different from the intensity at other times. Raman amplification of backscattered light produced by the probe pulse as it propagates along the fiber is achieved, as is amplification of the probe pulse if the pump power is non-zero during launch of the probe pulse.
摘要翻译： 一种在光纤感测系统中提供拉曼放大的方法，包括产生光的探针脉冲并将脉冲发射到感测光纤中，产生较短波长的泵浦光并调制它以产生时变强度分布，以及 将泵浦光引入传感光纤。 使得在发射探针脉冲期间所发射的泵浦光的强度与其他时间的强度不同。 实现当探头脉冲沿着光纤传播时由探针脉冲产生的反向散射光的拉曼放大，如果在发射探针脉冲期间泵功率不为零，探针脉冲的放大。
-
公开(公告)号：US20110229099A1
公开(公告)日：2011-09-22
申请号：US12293424
申请日：2007-02-22
申请人： Arthur H. Hartog , Andrew P. Strong
发明人： Arthur H. Hartog , Andrew P. Strong
IPC分类号： G02B6/44
CPC分类号： G01L1/242 , G01L1/246 , G02B6/4401 , G02B6/4432
摘要： A fiber optic cable includes a strain element including a first optical fiber and an optical element including a second optical fiber. The optical element is compliantly coupled with the strain element to transfer a portion of strain experienced by the strain element to the optical element. A fiber optic cable includes a strain transfer member, a central optical fiber disposed through the strain transfer member, and a tight jacket mechanically coupling the central optical fiber and the strain transfer member. The fiber optic cable further includes a compliant layer disposed about and affixed to the strain transfer member; a peripheral optical fiber disposed in the compliant layer, such that a portion of the strain experienced by the strain transfer member is transferred to the peripheral optical fiber via the compliant layer; and a protective cover disposed about the compliant layer.
摘要翻译： 光纤电缆包括包括第一光纤的应变元件和包括第二光纤的光学元件。 光学元件与应变元件顺应地耦合以将应变元件经历的应变的一部分转移到光学元件。 光纤电缆包括应变传递部件，通过应变传递部件设置的中心光纤以及将中心光纤与应变传递部件机械连接的紧套。 光纤电缆还包括设置在应变传递部件周围并固定到应变传递部件上的柔顺层; 设置在柔性层中的周边光纤，使得应变传递部件经受的应变的一部分经由柔性层传递到外围光纤; 以及围绕柔顺层设置的保护盖。
-
公开(公告)号：US07946341B2
公开(公告)日：2011-05-24
申请号：US11934551
申请日：2007-11-02
申请人： Arthur H. Hartog , J. Ernest Brown , John Mervyn Cook , Jonathan Elphick , Paul S. Hammond , Ashley Bernard Johnson
发明人： Arthur H. Hartog , J. Ernest Brown , John Mervyn Cook , Jonathan Elphick , Paul S. Hammond , Ashley Bernard Johnson
CPC分类号： G01V8/02 , E21B41/0064 , E21B43/26 , E21B47/06 , E21B47/123 , G01V1/226 , G01V8/16 , Y02C10/14
摘要： Acoustic monitoring of a conduit, a wellbore or a reservoir associated with hydrocarbon production or transportation and/or carbon dioxide sequestration is carried out using a fibre optic cable extending along or appurtenant to it as a distributed interferometer. Coherent Raleigh noise generated by the transmission of the coherent beam of radiation through the fiber optic is detected and processed to identify an acoustic occurrence.
摘要翻译： 与碳氢化合物生产或运输和/或二氧化碳封存有关的导管，井眼或储层的声学监测使用沿着或附属于其的分布式干涉仪延伸的光缆进行。 检测并处理由透过光纤的辐射的相干射线的透射产生的相干罗利噪声，以识别声发生。
-
公开(公告)号：US07854267B2
公开(公告)日：2010-12-21
申请号：US12430486
申请日：2009-04-27
CPC分类号： F42C11/00 , E21B23/00 , E21B47/123 , F42B3/113 , G01V11/002
摘要： The present invention comprises a system and methods to actuate downhole tools by transmitting an optical signal through an optical fiber to the downhole tool. The optical signal can comprise a specific optical signal frequency, signal, wavelength or intensity. The downhole tool can comprise packers, perforating guns, flow control valves, such as sleeve valves and ball valves, samplers, sensors, pumps, screens (such as to expand), chemical cutters, plugs, detonators, or nipples.
摘要翻译： 本发明包括通过将光信号通过光纤传输到井下工具来致动井下工具的系统和方法。 光信号可以包括特定的光信号频率，信号，波长或强度。 井下工具可以包括封隔器，射孔枪，流量控制阀，例如套管阀和球阀，取样器，传感器，泵，屏幕（如扩展），化学切割器，塞子，雷管或乳头。
-
10.发明申请MEASURING BRILLOUIN BACKSCATTER FROM AN OPTICAL FIBRE USING A TRACKING SIGNAL 有权使用跟踪信号从光纤测量BRILLUIN背板公开(公告)号：US20100002226A1
公开(公告)日：2010-01-07
申请号：US12444186
申请日：2007-09-20
申请人： Arthur H. Hartog
发明人： Arthur H. Hartog
IPC分类号： G01N21/47
CPC分类号： G01M11/319 , G01D5/35364
摘要： A method for measuring Brillouin backscattering from an optical fibre (18), comprises frequency mixing a first signal with a frequency f B (t) representative of the Brillouin frequency shift in backscattered light received from a deployed optical fibre with a second signal at a frequency f i (t) that varies in time in the same manner as a Brillouin shift previously measured from the fibre to produce a difference signal with a difference frequency iF(t) that has a nominally constant value corresponding to the situation where the received light has a Brillouin shift that matches the previously measured shift. The difference signal is acquired and processed to determine properties of the Brillouin shift and corresponding physical parameters producing the shift. The frequency mixing can be carried out. optically or electrically. Techniques for acquisition of the difference signal include the use of parallel frequency measurement channels and fast rate digital sampling.
摘要翻译： 一种用于从光纤（18）测量布里渊后向散射的方法，包括以表示频率f B（t）的频率混合第一信号，频率f B（t）表示从部署的光纤接收的后向散射光中的布里渊频移，频率为第二信号 fi（t）以与先前从光纤测量的布里渊偏移相同的方式在时间上变化，以产生具有与所接收的光具有的情况相对应的具有标称常数值的差异频率iF（t）的差分信号 布里渊偏移符合先前测量的位移。 获取并处理差分信号以确定布里渊位移的特性和产生偏移的相应物理参数。 可以进行混频。 光学或电学。 用于采集差分信号的技术包括使用并行频率测量通道和快速数字采样。
-
-
-
-
-
-
-
-
-
搜索结果
64 条记录 (耗时 0.024 秒)