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1. 发明公开

US20230417580A1 OPTICAL FIBER SENSOR, OPTICAL SYSTEM AND METHOD OF OPTICALLY INTERROGATING AN OPTICAL FIBER SENSOR 审中-公开
公开(公告)号：US20230417580A1
公开(公告)日：2023-12-28
申请号：US18367497
申请日：2023-09-13
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Gert Wim 'T HOOFT , Eibert Gerjan VAN PUTTEN , Jeroen Jan Lambertus HORIKX , Anna Hendrika VAN DUSSCHOTEN
IPC分类号： G01D5/353 , G01B11/24
CPC分类号： G01D5/35316 , G01B11/2441 , G01D5/35374
摘要： The present invention relates to an optical fiber sensor, comprising an optical fiber having embedded therein at least one fiber core (14, 16, 18, 20) extending along a length of the optical fiber, the at least one fiber core having a plurality of single fiber Bragg gratings (40, 42, 44) arranged in series along the at least one fiber core (14, 16, 18, 20), wherein each fiber Bragg grating (40, 42, 44) has a single reflection spectrum around a single reflection peak wavelength when interrogated with light in an unstrained state of the at least one fiber core (14, 16, 18, 20), wherein the reflection peak wavelengths of the single reflection spectra are different from fiber Bragg grating (40, 42, 44) to fiber Bragg grating (40, 42, 44) along the at least one fiber core. Also described is an optical system and a method of interrogating an optical fiber sensor.

2. 发明授权

US10837804B2 Enhanced microbend sensor 有权
公开(公告)号：US10837804B2
公开(公告)日：2020-11-17
申请号：US16432213
申请日：2019-06-05
申请人： CORNING INCORPORATED
发明人： Scott Robertson Bickham
IPC分类号： G01D5/353 , G02B6/028 , G02B6/12
CPC分类号： G01D5/35374 , G02B6/0288 , G02B6/12 , G02B2006/1209 , G02B2006/12138
摘要： An optical fiber sensor includes a first single mode fiber, a second single mode fiber, and a multimode fiber positioned between, and coupled to, the first single mode fiber and the second single mode fiber. The multimode fiber includes a graded-index core with an outer diameter between about 35 μm and about 45 μm. A numerical aperture of the core is between about 0.15 and about 0.25. The multimode fiber includes a cladding with an outer diameter between about 70 μm and about 90 μm. A coupling strength of an LP01 mode of the first single mode fiber to each of an LP02 mode and an LP03 mode of the multimode fiber is at least about 0.25.

3. 发明授权

US10641816B2 Current conduction element and system for insulation monitoring 有权
公开(公告)号：US10641816B2
公开(公告)日：2020-05-05
申请号：US15895099
申请日：2018-02-13
申请人： Dr. Ing. h.c. F. Porsche Aktiengesellschaft
发明人： Karsten Hähre , Raoul Heyne , Michael Kiefer
IPC分类号： G01R31/12 , G02B6/44 , G01D5/353 , G02B6/26 , H01B7/02 , H01B7/32
CPC分类号： G01R31/1218 , G01D5/353 , G01D5/35345 , G01D5/35374 , G01R31/1272 , G02B6/262 , G02B6/4421 , H01B7/02 , H01B7/328
摘要： A current conduction element includes an electrical conductor and an insulation of the electrical conductor. The insulation includes a light waveguiding unit. Furthermore, a system and method for insulation monitoring are described.

4. 发明授权

US09891134B2 Long distance optical fiber sensing system and method 有权
公开(公告)号：US09891134B2
公开(公告)日：2018-02-13
申请号：US14568439
申请日：2014-12-12
申请人： AT&T Intellectual Property I, L.P.
发明人： John Sinclair Huffman
IPC分类号： G01M11/00 , G01V1/00 , G01D5/353 , G01H9/00 , G01S17/10 , G08B13/12 , G01S17/02 , G01S17/88
CPC分类号： G01M11/3109 , G01D5/35358 , G01D5/35374 , G01H9/004 , G01M11/3136 , G01S17/026 , G01S17/102 , G01S17/88 , G01V1/001 , G08B13/124
摘要： A long-distance fiber optic monitoring system having a sensing unit and an analyzer that is remotely located from the sensing unit is provided. The sensing unit comprises a source of optical energy for injecting optical energy into the fiber optical cable and an optical detector configured to detect an optical return signal from the optical fiber. The detected optical return signal is associated with an acoustic signal impinging on the optical fiber. The analyzer receives a signal from the remote sensing unit via the optical fiber that is representative of the optical return signal, and determines a location of a disturbance based at least on the received signal. The representative signal can be transmitted from the remote sensing unit to the analyzer as an optical signal or via a metallic wired included with the optical fiber.

5. 发明申请

US20170179364A1 SELF-MONITORING SUPERCONDUCTING TAPE VIA INTEGRATED OPTICAL FIBERS 审中-公开
公开(公告)号：US20170179364A1
公开(公告)日：2017-06-22
申请号：US15382046
申请日：2016-12-16
申请人： North Carolina State University
发明人： Justin Schwartz , Federico Scurti , Samuel Rogers , Wan Kan Chan
IPC分类号： H01L39/12 , G01D5/353
CPC分类号： H01L39/126 , G01D5/35361 , G01D5/35374 , G21B1/21 , H01B7/324 , H01F6/02 , H01L39/143 , H05H7/00
摘要： Disclosed are systems and methods for a self-monitoring conducting system that can respond to temperature, strain, and/or radiation changes via the use of optical fibers. The self-monitoring conducting system comprises a conducting component integrated with one or more optical fibers. The temperature, strain, and/or radiation changes can be sensed or detected via optical interrogation of the one or more optical fibers.

6. 发明授权

US09534965B2 Flexible fibre optic deformation sensor system and method 有权
标题翻译：柔性光纤变形传感器系统及方法
公开(公告)号：US09534965B2
公开(公告)日：2017-01-03
申请号：US14250057
申请日：2014-04-10
申请人： University of New Brunswick
发明人： Anthony Brown , Bruce Colpitts
IPC分类号： G01K11/32 , G01B11/16 , G01L1/24 , G01D5/353 , G01N21/63
CPC分类号： G01K11/32 , G01B11/18 , G01D5/35364 , G01D5/35374 , G01K2011/322 , G01L1/242 , G01N2021/638
摘要： A cable for distributed fiber optic sensing comprising a flexible tape, an optical fiber suitable for Brillouin scattering measurement forming at least two lengths, and at least one free end of at least one length being connectable to a reading unit, wherein at least a section of the longitudinal length of the flexible tape is situated between at least a section of the two lengths such that the two lengths are in close proximity such that a temperature gradient between the two lengths is minimized, and wherein the section of the tape and the section of lengths can flex together.
摘要翻译：一种用于分布式光纤传感的电缆，包括柔性带，适用于形成至少两个长度的布里渊散射测量的光纤，以及可连接到读取单元的至少一个长度的至少一个自由端，其中至少一部分柔性带的纵向长度位于两个长度的至少一段之间，使得两个长度紧密接近，使得两个长度之间的温度梯度最小化，并且其中带的截面和长度可以一起弯曲。

7. 发明申请

US20140218716A1 FLEXIBLE FIBRE OPTIC DEFORMATION SENSOR SYSTEM AND METHOD 审中-公开
标题翻译：柔性纤维光学变形传感器系统及方法
公开(公告)号：US20140218716A1
公开(公告)日：2014-08-07
申请号：US14250057
申请日：2014-04-10
申请人： University of New Brunswick
发明人： Anthony Brown , Bruce Colpitts
IPC分类号： G01B11/16 , G01M11/00 , G01K11/32 , G01N21/63
CPC分类号： G01K11/32 , G01B11/18 , G01D5/35364 , G01D5/35374 , G01K2011/322 , G01L1/242 , G01N2021/638
摘要： A cable for distributed fibre optic sensing comprising a flexible tape, an optical fibre suitable for Brillouin scattering measurement forming at least two lengths, and at least one free end of at least one length being connectable to a reading unit, wherein at least a section of the longitudinal length of the flexible tape is situated between at least a section of the two lengths such that the two lengths are in close proximity such that a temperature gradient between the two lengths is minimized, and wherein the section of the tape and the section of lengths can flex together.
摘要翻译：一种用于分布式光纤传感的电缆，包括柔性带，适用于形成至少两个长度的布里渊散射测量的光纤，以及可连接到读取单元的至少一个长度的至少一个自由端，其中至少一部分柔性带的纵向长度位于两个长度的至少一段之间，使得两个长度紧密接近，使得两个长度之间的温度梯度最小化，并且其中带的截面和长度可以一起弯曲。

8. 发明申请

US20110075152A1 Long Distance Optical Fiber Sensing System and Method 有权
标题翻译：长距离光纤传感系统及方法
公开(公告)号：US20110075152A1
公开(公告)日：2011-03-31
申请号：US12567853
申请日：2009-09-28
申请人： John Sinclair Huffman
发明人： John Sinclair Huffman
IPC分类号： G01B9/02
CPC分类号： G01M11/3109 , G01D5/35358 , G01D5/35374 , G01H9/004 , G01M11/3136 , G01S17/026 , G01S17/102 , G01S17/88 , G01V1/001 , G08B13/124
摘要： A long-distance fiber optic monitoring system having a sensing unit and an analyzer that is remotely located from the sensing unit is provided. The sensing unit comprises a source of optical energy for injecting optical energy into the fiber optical cable and an optical detector configured to detect an optical return signal from the optical fiber. The detected optical return signal is associated with an acoustic signal impinging on the optical fiber. The analyzer receives a signal from the remote sensing unit via the optical fiber that is representative of the optical return signal, and determines a location of a disturbance based at least on the received signal. The representative signal can be transmitted from the remote sensing unit to the analyzer as an optical signal or via a metallic wired included with the optical fiber.
摘要翻译：提供了具有远离感测单元的感测单元和分析器的长距离光纤监视系统。感测单元包括用于将光能注入到光纤光缆中的光能源和被配置为检测来自光纤的光返回信号的光检测器。检测到的光返回信号与入射在光纤上的声信号相关联。分析仪通过表示光返回信号的光纤接收来自遥感单元的信号，并且至少基于接收信号确定干扰的位置。代表信号可以作为光信号从遥感单元发送到分析器，或者通过光纤包括的金属线传输。

9. 发明申请

US20020063200A1 Apparatus for protecting sensing devices 有权
标题翻译：用于保护感测装置的装置
公开(公告)号：US20020063200A1
公开(公告)日：2002-05-30
申请号：US09726060
申请日：2000-11-29
发明人： Richard T. Jones , Allen R. Davis , John M. Faustino
IPC分类号： G01J001/04
CPC分类号： G01F1/666 , G01D5/35316 , G01D5/35374
摘要： An apparatus for non-intrusively sensing fluid flow within a pipe is provided. The apparatus includes an array of sensors that include a plurality of optical fiber coils. The array of sensors senses the fluid flow inside the pipe. At least one optical reflective device is disposed between adjacent optical fiber coils. An isolation pad is disposed between each optical reflective device and the pipe.
摘要翻译：提供了一种用于非侵入式地感测管内流体流动的装置。该装置包括包括多个光纤线圈的传感器阵列。传感器阵列检测管道内的流体流动。至少一个光学反射装置设置在相邻的光纤线圈之间。隔离垫设置在每个光反射装置和管之间。

10. 发明申请

US20180045543A1 Method and Apparatus for Optical Sensing 审中-公开
公开(公告)号：US20180045543A1
公开(公告)日：2018-02-15
申请号：US15555628
申请日：2016-03-07
申请人： Silixa Ltd.
发明人： Mahmoud Farhadiroushan , Tom Parker , Sergey Shatalin
IPC分类号： G01D5/353 , G01H9/00
CPC分类号： G01D5/35374 , G01D5/35306 , G01D5/3537 , G01H9/004
摘要： An optical fiber distributed acoustic sensor system includes weak broadband reflectors inserted periodically along the fiber. The reflectors reflect only a small proportion of the light from the DAS incident thereon back along the fiber, typically in the region of 0.001% to 0.1%, but preferably around 0.01% reflectivity per reflector. In addition, to allow for temperate compensation to ensure that the same reflectivity is obtained if the temperature changes, the reflection bandwidth is relatively broadband. In some embodiments the reflectors are formed from a series of fiber Bragg gratings, each with a different center reflecting frequency, the reflecting frequencies and bandwidths of the gratings being selected to provide the broadband reflection. A chirped grating may also be used to provide the same effect. In preferred embodiments, the reflectors are spaced at half the gauge length i.e. the desired spatial resolution of the optical fiber DAS.

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