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公开(公告)号：US20180180451A1
公开(公告)日：2018-06-28
申请号：US15849339
申请日：2017-12-20
发明人： Sfar Zaoui Wissem , Clemens Pohl , Henrik Hoff
CPC分类号： G01D5/24452 , G01D5/268 , G01D5/35306 , G01D5/35361 , G01D5/35387 , G01H9/004 , G01V1/001
摘要： A system and method for dynamically calibrating a distributed fibre optic sensing system is disclosed. The calibration system includes a light source for generating pulses of coherent light, an optical fibre arranged at least partly in a ground soil region to guide the light and a photo detector for detecting scattered light returning from the optical fibre in dependence of time. The method includes obtaining information from which a temporal change of an acoustic transfer characteristic of the ground soil region is derivable and calibrating a distributed acoustic sensing system based on the changed acoustic transfer characteristic.
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2.发明申请公开(公告)号：US20170284835A1
公开(公告)日：2017-10-05
申请号：US15631677
申请日：2017-06-23
发明人： Domino TAVERNER
IPC分类号： G01D5/353
CPC分类号： G01D5/35354 , G01D5/353 , G01D5/35316 , G01D5/35387 , G01K11/3206 , G01L1/246 , G02B6/29319
摘要： Methods and apparatus for fast sweeping a spectral bandwidth in order to distinguish among signals received from effectively wavelength division multiplexed (WDMed) and time division multiplexed (TDMed) optical components on a single fiber. For some embodiments, a method for interrogating optical elements having characteristic wavelengths spanning a sweep range is provided. The method generally includes introducing a pulse of light, by an optical source, into an optical waveguide to interrogate at least a first set of optical elements having different characteristic wavelengths by performing a sweep of wavelengths over a period of the pulse, wherein the period is less than a round-trip time for light reflected from an optical element closest to the optical source to reach a receiver and processing the reflected light to determine a parameter based on the times at which signals are received.
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3.发明申请METHOD AND SYSTEM USING WAVELENGTH DIVISION MULTIPLEXING FOR ELIMINATING AND REDUCING LIGHT DIFFUSION AND LIGHT REFLECTION INTERFERENCE IN INTERFERENCE PATH 有权使用波长分割多路复用来消除和减少干扰路径中的光扩散和光反射干扰的方法和系统公开(公告)号：US20160252371A1
公开(公告)日：2016-09-01
申请号：US15028865
申请日：2014-10-10
申请人： FUDAN UNIVERSITY
CPC分类号： G01D5/35387 , G01D5/35358 , G01M5/0025 , G01M5/0091 , G02B6/2861 , G08B13/124
摘要： A method using wavelength division multiplexing for reducing the light diffusion and light reflection interference in an interference path, comprising: connecting a wavelength division multiplexer (10) serially at the end of a sensing optical fiber (6); using the wavelength division multiplexer (10) to extract a wavelength component from a working path for measuring the interfering signal caused by light diffusion and light reflection; using the signal as a reference, extracting the effective signal component that has been interfered with by light diffusion and light reflection, and obtaining a pure effective signal. Because the device connected at the end of the sensing optical fiber (6) is passive and requires no power, the system is easy to implement and is particularly suitable for situations in which power provision is difficult at the end of the sensing optical fiber (6). The method is suitable for long distance pipeline monitoring and wide-range optical fiber perimeter security. Also provided is a system using wavelength division multiplexing for reducing the light diffusion and light reflection interference in an interference path.
摘要翻译： 一种使用波分复用来减少干涉路径中的光扩散和光反射干扰的方法，包括：在感测光纤（6）的末端串联连接波分多路复用器（10）; 使用波分复用器（10）从用于测量由光漫射和光反射引起的干扰信号的工作路径提取波长分量; 使用该信号作为参考，提取已经被光扩散和光反射干扰的有效信号分量，并获得纯有效信号。 由于连接在感测光纤（6）端部的设备是被动的，不需要电源，所以系统易于实现，特别适用于传感光纤末端难以提供功率的情况（6 ）。 该方法适用于长距离管道监控和广域光纤周边安全。 还提供了一种使用波分复用来减少干涉路径中的光扩散和光反射干扰的系统。
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公开(公告)号：US09310273B2
公开(公告)日：2016-04-12
申请号：US14128621
申请日：2012-06-28
申请人： Pawel Niewczas , Philip Orr
发明人： Pawel Niewczas , Philip Orr
CPC分类号： G01M11/30 , G01D5/35316 , G01D5/35335 , G01D5/35387 , G01D5/3539
摘要： A monitoring system for monitoring a plurality of fiber Bragg gratings in an optical fiber, each fiber Bragg grating being sensitive to a different wavelength of light. The system comprises a broadband source for illuminating the optical fiber; at least one optical interferometer; light feeding means for feeding to an input of the interferometer light reflected from the fiber Bragg gratings, and a processor for processing the output from the interferometer to determine the wavelength of the reflected light. The light feeding means comprise a wavelength division multiplexer operable to separate light received from the optical fiber into a plurality of wavelengths, each associated with one of the fiber Bragg gratings and/or a time division mulitplexer operable to separate light received from the optical fiber into in a time separated series.
摘要翻译： 一种用于监测光纤中的多个光纤布拉格光栅的监视系统，每个光纤布拉格光栅对不同波长的光敏感。 该系统包括用于照亮光纤的宽带源; 至少一个光学干涉仪; 用于馈送到从光纤布拉格光栅反射的干涉仪光的输入的光馈送装置，以及用于处理来自干涉仪的输出以确定反射光的波长的处理器。 光馈送装置包括波分复用器，其可操作以将从光纤接收的光分离成多个波长，每个波长与光纤布拉格光栅中的一个相关联，和/或时分复用器可操作以将从光纤接收的光分离成 在一个时间分离的系列。
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5.发明授权Combined swept-carrier and swept-modulation frequency optical frequency domain reflectometry 有权组合扫频载波和扫频调制频率光频域反射测量公开(公告)号：US09267821B2
公开(公告)日：2016-02-23
申请号：US12695613
申请日：2010-01-28
CPC分类号： G01D5/35316 , G01D5/35387 , G01M11/3172
摘要： An apparatus for estimating a parameter, the apparatus includes: an optical fiber; a component in communication with the optical fiber and configured to interact with light at a wavelength related to the parameter; and an optical interrogator in communication with the optical fiber and configured to: illuminate the optical fiber with a series of light inputs, each light input in the series having a substantially constant unique optical wavelength and swept-frequency amplitude modulation; and receive a resulting light signal associated with each light input in the series; wherein the resulting light signals associated with the series of light inputs are used to estimate the parameter.
摘要翻译： 一种用于估计参数的装置，所述装置包括：光纤; 与所述光纤通信并被配置成与所述参数相关的波长的光相互作用的部件; 以及光学询问器，其与所述光纤通信并且被配置为：用一系列光输入照射所述光纤，所述串联中的每个光输入具有基本上恒定的唯一光波长和扫频振幅调制; 并接收与该系列中的每个光输入相关联的结果光信号; 其中与所述一系列光输入相关联的所得光信号用于估计所述参数。
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6.发明授权Apparatus and methods utilizing optical sensors operating in the reflection mode 有权利用以反射模式工作的光学传感器的装置和方法公开(公告)号：US09234790B2
公开(公告)日：2016-01-12
申请号：US13839437
申请日：2013-03-15
CPC分类号： G01J1/0425 , G01D5/35312 , G01D5/35367 , G01D5/35387 , G01D5/3539 , G01H9/004 , G01V8/14 , G01V8/16 , G01V8/22 , G01V8/24
摘要： Optical apparatus and methods utilizing sensors operating in the reflection mode are provided. The apparatus includes at least one optical bus. The at least one optical bus is configured to be optically coupled to at least one source of input optical signals, to at least one optical detector, and to a plurality of reflective sensing elements. The at least one optical bus transmits an input optical signal from the at least one source to the plurality of reflective sensing elements. At least one reflective sensing element of the plurality of reflective sensing elements receives a portion of the input optical signal and reflects at least a portion of the received portion. The at least one optical bus transmits the reflected portion to the at least one optical detector.
摘要翻译： 提供利用以反射模式工作的传感器的光学装置和方法。 该装置包括至少一个光学总线。 所述至少一个光学总线被配置为光学耦合到至少一个输入光信号源，至少一个光学检测器以及多个反射感测元件。 所述至少一个光学总线将输入光信号从所述至少一个源传输到所述多个反射感测元件。 多个反射感测元件中的至少一个反射感测元件接收输入光信号的一部分并且反射接收部分的至少一部分。 至少一个光学总线将反射部分传输到至少一个光学检测器。
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公开(公告)号：US20150226622A1
公开(公告)日：2015-08-13
申请号：US14424698
申请日：2013-08-29
发明人： Lun Kai Cheng , Peter Martijn Toet , Rik Jansen
CPC分类号： G01L7/041 , E21B47/06 , G01D5/35316 , G01D5/35387 , G01L1/246 , G01L9/0027 , G01L11/025
摘要： A pressure sensing assembly (1), comprising: an elongate, axially extending tube (100), having a flexible tube wall (102) that encloses an inner pressure chamber (106); and at least one sensor unit (200), including: two tube wall fixation devices (210), connected to the tube wall (102) at respective axially spaced apart positions, and configured to fix respective diameters (D, d) of the tube wall at said positions; and a first strain sensing element (220), connected to the tube wall (102) at a first position axially in between said two tube wall devices (210), and configured to provide a first signal indicative of an axial elongation of the tube wall resulting from a change in axial curvature of the tube wall when a pressure differential between the inner pressure chamber (106) and an outside environment (108) of the tube is applied across the tube wall at said first position.
摘要翻译： 一种压力感测组件（1），包括：细长的轴向延伸的管（100），其具有包围内压室（106）的柔性管壁（102）; 和至少一个传感器单元（200），包括：两个管壁固定装置（210），其在相应的轴向间隔开的位置处连接到管壁（102），并且构造成固定管的相应直径（D，d） 所在位置的墙; 以及第一应变传感元件（220），其在轴向位于所述两个管壁装置（210）之间的第一位置处连接到所述管壁（102），并且被配置为提供指示所述管壁的轴向伸长的第一信号 这是由于当在所述第一位置处跨越管壁而将管内壁压力室（106）和外部环境（108）之间的压力差施加在管壁的轴向曲率上时产生。
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公开(公告)号：US20150185052A1
公开(公告)日：2015-07-02
申请号：US14412643
申请日：2013-07-04
CPC分类号： G01D5/268 , G01D5/35383 , G01D5/35387 , G01V1/226
摘要： An optical monitoring system comprising first and second sensor arrays interrogated via first and second optical connections from an interrogator location. The system is configured such that no wavelength is carried bi-directionally in the first and second optical connections. In typical systems the optical connections comprise trunk cables from the sensor arrays to the interrogator location.
摘要翻译： 一种光学监测系统，包括经由来自询问器位置的第一和第二光学连接件询问的第一和第二传感器阵列。 该系统被配置为使得在第一和第二光学连接中不会双向地承载波长。 在典型的系统中，光学连接包括从传感器阵列到询问器位置的中继电缆。
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9.发明申请公开(公告)号：US20150100279A1
公开(公告)日：2015-04-09
申请号：US14510537
申请日：2014-10-09
申请人： Optoplan AS
CPC分类号： G01B9/02075 , G01B9/02056 , G01B9/0207 , G01D5/35335 , G01D5/35387 , G01D5/3539 , G01H9/004 , G01V1/186
摘要： A method of processing data from a distributed fibre-optic interferometric sensor system for measuring a measurand, the system comprising multiple interferometric sensors. The method comprises interrogating two or more of the multiple interferometric sensors to record a raw measurement time series for each of the sensors. The method further comprises calculating a common reference time series as a measure of central tendency of the raw measurement time series from two or more reference sensors, the reference sensors being selected from the multiple interferometric sensors. Finally, the method comprises compensating at least one raw measurement time series from a measurement sensor selected from the multiple interferometric sensors with the common reference time series to produce a compensated measurement time series, the measurement sensor being configured to be sensitive to the measurand. The invention further relates to a distributed fibre-optic interferometric sensor system.
摘要翻译： 一种从用于测量被测量的分布式光纤干涉测量传感器系统处理数据的方法，所述系统包括多个干涉测量传感器。 该方法包括询问多个干涉测量传感器中的两个或更多个以记录每个传感器的原始测量时间序列。 该方法还包括计算公共参考时间序列作为来自两个或更多个参考传感器的原始测量时间序列的集中趋势的度量，参考传感器从多个干涉测量传感器中选择。 最后，该方法包括从具有公共参考时间序列的多个干涉测量传感器中选择的测量传感器补偿至少一个原始测量时间序列，以产生经补偿的测量时间序列，测量传感器被配置为对被测量敏感。 本发明还涉及分布式光纤干涉测量传感器系统。
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公开(公告)号：US20150033838A1
公开(公告)日：2015-02-05
申请号：US14365382
申请日：2012-12-10
申请人： RENAULT s.a.s.
CPC分类号： B60G11/14 , B60G11/15 , B60G2202/12 , B60G2202/143 , B60G2204/12422 , B60G2204/2022 , B60G2206/426 , B60G2206/7101 , B60G2400/60 , B60G2401/144 , F16F1/3605 , F16F1/3665 , F16F1/368 , G01B11/18 , G01D5/35316 , G01D5/35387 , G01G19/08 , G01L1/242 , G01L1/246 , G01M11/086 , G01M17/04
摘要： A spring including a composite structure including reinforcement fibers in a matrix. The composite structure further includes at least one Bragg cell and at least one optical fiber connected to the Bragg cell.
摘要翻译： 包括在基体中包括增强纤维的复合结构的弹簧。 复合结构还包括至少一个布拉格单元和连接到布拉格单元的至少一个光纤。
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