公开(公告)号：US07466422B2

公开(公告)日：2008-12-16

申请号：US11866040

申请日：2007-10-02

Applicant: Ole Henrik Waagaard ,  Erlend Rønnekleiv

Inventor： Ole Henrik Waagaard ,  Erlend Rønnekleiv

IPC: G01B9/02

CPC classification number: G01D5/3539 ,  G01D5/35312

Abstract: Unwanted signal components in time-division multiplexed (TDM) systems may lead to crosstalk and noise if these pulses overlap with signal pulses from an interrogated sensor. The crosstalk and noise are dominated by interference between the signal pulses from the interrogated sensor and the unwanted signal components and can be greatly reduced by suppressing this interference signal. The unwanted signal components may include overlapping pulses originating from different sets of interrogation pulses (repetition periods). Modulating the phase or frequency between the repetition periods so that the unwanted interference signal does not appear at frequencies from which the phase of the interrogated sensor is demodulated suppresses this interference. Other unwanted signal components include leakage light during dark periods of the duty cycle of an interrogation signal. Modulating the phase difference between the interrogation signal and the leakage light suppresses the interference between the leakage light and the interrogation signal.

Abstract translation: 如果这些脉冲与来自询问的传感器的信号脉冲重叠，则时分复用（TDM）系统中的不需要的信号分量可能导致串扰和噪声。 串扰和噪声由来自询问的传感器的信号脉冲与不需要的信号分量之间的干扰支配，并且可以通过抑制该干扰信号来大大降低。 不需要的信号分量可以包括源于不同组的询问脉冲（重复周期）的重叠脉冲。 调制重复周期之间的相位或频率，使得不需要的干扰信号不会出现在被询问的传感器的相位被解调的频率处，从而抑制这种干扰。 其他不需要的信号分量包括在询问信号的占空比的暗周期期间的泄漏光。 调制询问信号和泄漏光之间的相位差可抑制漏光与询问信号之间的干扰。

公开(公告)号：US07359061B2

公开(公告)日：2008-04-15

申请号：US11459921

申请日：2006-07-25

Applicant: Ole Henrik Waagaard ,  Erlend Rønnekleiv

Inventor： Ole Henrik Waagaard ,  Erlend Rønnekleiv

IPC: G01B9/02 ,  G01B11/02 ,  G02B6/00

CPC classification number: G01D5/345 ,  G01D5/35303 ,  G01D5/35383

Abstract: A method and apparatus that uses specific source modulation and detectors to detect a response that carries information about a system response matrix associated with each sensor in a interferometric sensor array and extracting a sensor response in a manner that eliminates polarization-induced signal fading and that is insensitive to lead fiber birefringence fluctuations.

Abstract translation: 一种使用特定源调制和检测器来检测携带有关干涉式传感器阵列中与每个传感器相关联的系统响应矩阵的信息的响应的方法和装置，并以消除极化诱导的信号衰落的方式提取传感器响应， 对引线纤维双折射波动不敏感。

公开(公告)号：US07081959B2

公开(公告)日：2006-07-25

申请号：US10650117

申请日：2003-08-27

Applicant: Ole Henrik Waagaard ,  Erlend Rønnekleiv

Inventor： Ole Henrik Waagaard ,  Erlend Rønnekleiv

IPC: G01B9/02

CPC classification number: G01D5/345 ,  G01D5/35303 ,  G01D5/35383

Abstract: A method and apparatus that uses specific source modulation and detectors to detect a response that carries information about a system response matrix associated with each sensor in a interferometric sensor array and extracting a sensor response in a manner that eliminates polarization-induced signal fading and that is insensitive to lead fiber birefringence fluctuations.

Abstract translation: 一种使用特定源调制和检测器来检测携带有关干涉式传感器阵列中与每个传感器相关联的系统响应矩阵的信息的响应的方法和装置，并以消除极化诱导的信号衰落的方式提取传感器响应， 对引线纤维双折射波动不敏感。

公开(公告)号：US06888125B2

公开(公告)日：2005-05-03

申请号：US10017707

申请日：2001-12-12

Applicant: Erlend Ronnekleiv ,  Dag Roar Hjelme ,  Jon Thomas Kringlebotn

Inventor： Erlend Ronnekleiv ,  Dag Roar Hjelme ,  Jon Thomas Kringlebotn

IPC: G01D5/353 ,  H01S3/067 ,  G01J4/00 ,  G01N21/25

CPC classification number: G01D5/35383 ,  G01D5/35303 ,  H01S3/0675

Abstract: A fiber optic sensor system comprises at least one measuring sensor 1 providing an optical output dependent upon one or more parameters to be measured, e.g. temperature, and at least one reference sensor 2 providing a reference output for comparison with the measuring sensor output. The reference sensor is provided in a birefringent fiber.The system includes a detecting means 13,14 whereby a reference beat signal f2 is derived by measuring the optical frequency splitting between frequency components in different polarization planes of the reference sensor output. A further beat signal f3 is generated between the measuring and reference sensor outputs, such beat signals being used to derive a measurement of one or more parameters.

Abstract translation: 光纤传感器系统包括至少一个测量传感器1，其提供取决于待测量的一个或多个参数的光输出，例如， 温度和至少一个参考传感器2，其提供用于与测量传感器输出比较的参考输出。 参考传感器设置在双折射光纤中。 该系统包括检测装置13,14，借此通过测量参考传感器输出的不同极化平面中的频率分量之间的光学频率分割来导出基准差拍信号f 2 2。 在测量和参考传感器输出之间产生进一步的跳动信号f 3 3，这样的拍频信号用于导出一个或多个参数的测量。

公开(公告)号：US06856401B1

公开(公告)日：2005-02-15

申请号：US10018460

申请日：2000-06-22

Applicant: Erlend Rønnekleiv

Inventor： Erlend Rønnekleiv

IPC: G01D5/34 ,  G01D5/353 ,  G01B9/02

CPC classification number: G01D5/35383 ,  G01D5/344 ,  G01D5/35303

Abstract: Method and assembly for sustained elimination or reduction of polarization induced signal fading in optical interferometer networks comprising at least two optical paths from an input port to an output port, the transmission delays of the paths differing by τ, an interrogation arrangement interrogating the optical phase differences between the paths, containing at least one optical source launching optical power into a port, a detector arrangement converting the optical power from an output port into electrical detector signals, and a control and signal processing unit capable of processing detector signals to determine the phase difference. The method comprising the steps of: altering the input polarization state produced by the source with a modulation frequency that is comparable to or higher than 1/(4τ) receiving the optical signals at the detector arrangement providing a detector signal; processing the detector signal determining the phase difference between the optical signals.

Abstract translation: 用于持续消除或减少包括从输入端口到输出端口的至少两条光路的光干涉仪网络中的偏振感应信号衰落的方法和组件，所述路径的传输延迟与τ相差，询问方式询问光学相位差 在路径之间，包含至少一个光源将光功率发射到端口中，检测器装置将光功率从输出端口转换为电检测器信号，以及控制和信号处理单元，其能够处理检测器信号以确定相位差 。 该方法包括以下步骤：以提供检测器信号的检测器装置接收光信号的等于或高于1 /（4tau）的调制频率来改变由源产生的输入偏振状态; 处理检测器信号，确定光信号之间的相位差。

公开(公告)号：US10247581B2

公开(公告)日：2019-04-02

申请号：US15306832

申请日：2015-04-28

Applicant: OPTOPLAN AS

Inventor： Erlend Ronnekleiv ,  Ole Henrik Waagaard

IPC: G01B9/02 ,  G01D5/26

Abstract: The invention relates to a method of interrogating an interferometric optical fiber sensor system including a laser source configured to generate interrogation light and a sensor array with at least a first reflector and a second reflector. The method includes continuously and repeatedly frequency sweeping the interrogation light from the laser source within a sweep bandwidth (SWB) over a sweep duration (tsw) with a substantially constant sweep rate r=SBW/tsw to produce a swept interrogation light signal, launching the swept interrogation light signal into the sensor array, detecting reflected signals being returned from the sensor array by each of the reflectors, respectively, wherein detection includes mixing a return light signal from the sensor array with a local oscillator signal onto an optical receiver to produce an electrical radio frequency signal, demultiplexing the electrical radio frequency signal into a first signal channel and a second signal channel, corresponding to the first and second reflector, respectively, demodulating each of the first and second signal channel into a first phase response from the first reflector and a second phase response from the second reflector, and subtracting the first phase response from the second phase response to obtain a sensor phase signal.

公开(公告)号：US09042202B2

公开(公告)日：2015-05-26

申请号：US12482221

申请日：2009-06-10

Applicant: Arne Berg ,  Jon Thomas Kringlebotn

Inventor： Arne Berg ,  Jon Thomas Kringlebotn

IPC: G01V1/38 ,  G01V13/00 ,  G01P15/093 ,  G01V1/20

CPC classification number: G01V13/00 ,  G01P15/093 ,  G01V1/201 ,  Y10T29/49826

Abstract: There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterized by a buffer layer 2 which is provided with a cut-out 50 and a sensor element arranged in the cut-out 50. There is also provided an associated hydrophone for integration into the seismic streamer cable. The hydrophone is characteristic in a split-element sensor base 10, 11 being suited for efficient mounting into the cut-outs 50 of the seismic cable. There is also provided an associated accelerometer for integration into the seismic streamer cable. The accelerometer is characteristic by a split-element sensor base 30, 35 for being efficiently arranged into the cut-outs 50 of the seismic cable. A method of producing a seismic streamer cable according to the invention incorporating a hydrophone or accelerometer according to the invention is also provided.

Abstract translation: 提供了一种用于海洋环境中的地震测量的坚实的地震拖缆。 拖缆的特征在于缓冲层2，其设置有切口50和布置在切口50中的传感器元件。还提供了用于集成到地震拖缆电缆中的相关联的水听器。 水听器在分体元件传感器基座10,11中是特征，适合于有效地安装到地震电缆的切口50中。 还提供了一种用于集成到地震拖缆中的相关加速度计。 加速度计的特征在于分离元件传感器基座30,35，用于有效地布置在地震电缆的切口50中。 还提供了根据本发明的制造包括水​​听器或加速度计的地震拖缆的方法。

公开(公告)号：US20140104982A1

公开(公告)日：2014-04-17

申请号：US14105684

申请日：2013-12-13

Applicant: Optoplan AS

Inventor： Arne BERG ,  Torbjorn Heglum ,  Roar Furuhaug ,  Tormod Bliksas

IPC: G01V1/20

CPC classification number: G01V1/201 ,  G01V1/38 ,  G01V2210/1427 ,  Y10T29/49117

Abstract: Methods and apparatus for cable termination and sensor integration at a sensor station within an ocean bottom seismic (OBS) cable array are disclosed. The sensor stations include a housing for various sensor components. Additionally, the sensor stations can accommodate an excess length of any data transmission members which may not be cut at the sensor station while enabling connection of one or more cut data transmission members with the sensor components. The sensor stations further manage any strength elements of the cable array.

Abstract translation: 公开了在海底地震（OBS）电缆阵列内的传感器站处的电缆终端和传感器集成的方法和装置。 传感器站包括用于各种传感器部件的壳体。 此外，传感器站可以容纳任何数据传输构件的多余长度，这些数据传输构件可以在传感器站处不被切割，同时能够使一个或多个切割数据传输构件与传感器部件连接。 传感器站进一步管理电缆阵列的任何强度元件。

公开(公告)号：US08499638B2

公开(公告)日：2013-08-06

申请号：US13038004

申请日：2011-03-01

Applicant: Roar Furuhaug

Inventor： Roar Furuhaug

IPC: G01P15/08 ,  G01H9/00

CPC classification number: G01H9/004 ,  G01P15/093 ,  Y10T29/49002

Abstract: A tri-axis accelerometer for use in seismic surveying is provided. The accelerometer comprises at least three fiber optic accelerometer elements which have respective fiber sensor coils, and which are characteristic in that the fiber sensor coils are coiled about a common coiling axis and at least one of the accelerometer elements is a slant angle accelerometer element. A corresponding method of manufacturing a tri-axis fiber optic accelerometer is also disclosed. A fiber optic tri-axis accelerometer for sensing acceleration in three directions is also provided, which comprises a first, a second, and a third sensor base, each base including a first, a second, and a third fixed element, respectively, and a first, a second, and a third movable element, respectively, each pair of fixed and movable elements carrying a fiber sensing coil. The fiber sensing coils are all coiled around a common coiling axis and at least one of the movable elements is designed and mounted so as to be movable in a direction that is slanted with respect to the common coiling axis.

Abstract translation: 提供了一种用于地震测量的三轴加速度计。 加速度计包括至少三个光纤加速度计元件，其具有相应的光纤传感器线圈，其特征在于，光纤传感器线圈围绕公共卷取轴卷绕，并且加速度计元件中的至少一个是倾斜加速度计元件。 还公开了制造三轴光纤加速度计的相应方法。 还提供了用于感测三个方向上的加速度的光纤三轴加速度计，其包括第一，第二和第三传感器基座，每个基座分别包括第一，第二和第三固定元件，以及 第一，第二和第三可移动元件，每对固定和可移动元件承载纤维感测线圈。 光纤传感线圈全部卷绕在共同的卷取轴上，并且可移动元件中的至少一个被设计和安装成可在相对于公共卷取轴线倾斜的方向上移动。

公开(公告)号：US08064286B2

公开(公告)日：2011-11-22

申请号：US11932920

申请日：2007-10-31

Applicant: Erlend Rønnekleiv ,  Ole Henrik Waagaard ,  Hilde Nakstad ,  Arne Berg

Inventor： Erlend Rønnekleiv ,  Ole Henrik Waagaard ,  Hilde Nakstad ,  Arne Berg

IPC: G01V1/38

CPC classification number: G01D5/35383 ,  G01H9/004 ,  G01V1/20 ,  G01V1/201 ,  G01V1/226 ,  G01V1/3808 ,  G01V2210/1427

Abstract: Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments, networks of optical ocean bottom seismic (OBS) stations are provided, in which sensor stations are efficiently deployed in a modular fashion as series of array cable modules deployed along a multi-fiber cable.

Abstract translation: 提供了地震传感器系统和传感器站拓扑，以及相应的电缆和传感器站组件，制造和部署技术。 对于一些实施例，提供了光学海底地震（OBS）站的网络，其中传感器站以模块化方式被有效地部署为沿着多光纤缆线部署的一系列阵列电缆模块。