公开(公告)号：US5820265A

公开(公告)日：1998-10-13

申请号：US645595

申请日：1996-05-13

申请人： Marcos Y. Kleinerman

发明人： Marcos Y. Kleinerman

IPC分类号： A61B17/00 ,  G01D5/353 ,  G01J5/08 ,  G01J5/52 ,  G01K11/12 ,  G01K11/32 ,  G06F3/033 ,  G06F3/041 ,  G06F3/042 ,  G01K3/06 ,  G02B6/16

CPC分类号： G06F3/041 ,  G01D5/35345 ,  G01D5/35374 ,  G01D5/35377 ,  G01J5/08 ,  G01J5/0821 ,  G01J5/0896 ,  G01J5/52 ,  G01J5/602 ,  G01K11/12 ,  G01K11/32 ,  G01K11/3213 ,  G06F3/0414 ,  A61B2017/00084 ,  G06F2203/04109

摘要： Optical temperature sensors use a temperature-dependent relative distribution of the intensity of interrogating light of wavelengths .lambda..sub.1 between two light-guiding regions of a light-guiding probe. The relative distribution can be determined by a plurality of means including the spatial separation of the lights carried by the two light-guiding regions, and/or the conversion of one of the lights into light of wavelengths .lambda..sub.2 different and easily separable from light of wavelength .lambda..sub.1. The sensors can be adapted to measure infrared radiation by measuring its heating effect on the sensing probes and to convert a thermal infrared image into a visible image.

摘要翻译： 光学温度传感器使用光导探针的两个光导区域之间的波长λ1的询问光的强度的温度依赖性相对分布。 相对分布可以通过包括由两个光导区域携带的光的空间分离的多种装置和/或将一种光转换成波长λ2的光不同且易于与光 波长λ1。传感器可以通过测量其对感测探头的加热效应并将热红外图像转换成可见光图像来适应于测量红外辐射。

公开(公告)号：US4891511A

公开(公告)日：1990-01-02

申请号：US238695

申请日：1988-08-31

申请人： Stuart E. Reed

发明人： Stuart E. Reed

IPC分类号： G01D5/353

CPC分类号： G01D5/35377 ,  G01D5/35374

摘要： A fiber optic microbend sensor with a braided arrangement of multiple optical fibers (or fibers and fillers) 16 such that the length dependent microbending losses result from the interaction of the fibers 10 themselves (or the fibers and fillers) without the need for additional external structures such as corrugated plates 12, 14. A plurality of fibers with at least one of the fibers being an optical fiber 10 are braided together into an interwoven strand 16 to produce the fiber optic microbend sensor. The spatial bend frequency of the braid 16 corresponds to the optimum microbend frequency for the fiber 10.

摘要翻译： 具有多根光纤（或纤维和填料）16的编织布置的光纤微弯传感器，使得长度相关的微弯曲损耗由纤维10自身（或纤维和填料）的相互作用产生，而不需要额外的外部结构 例如波纹板12,14。具有光纤10中的至少一个光纤的多个光纤被编织在一起成为交织链16以产生光纤微弯曲传感器。 编织物16的空间弯曲频率对应于纤维10的最佳微弯曲频率。

公开(公告)号：US11788868B2

公开(公告)日：2023-10-17

申请号：US17289281

申请日：2019-08-30

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 untrained 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.

公开(公告)号：US20230314189A1

公开(公告)日：2023-10-05

申请号：US18209569

申请日：2023-06-14

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： G01D5/3537 ,  G01H9/004 ,  G01D5/35306 ,  G01D5/35374 ,  E21B47/135

摘要： An optical fiber distributed acoustic sensor system makes use of a specially designed optical fiber to improve overall sensitivity of the system by a factor in excess of 10. This is achieved by inserting into the fiber weak broadband reflectors periodically along the fiber. The reflectors reflect 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%. To allow for temperate compensation to ensure that the same reflectivity is obtained if the temperature changes, the reflection bandwidth is relatively broadband. 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. The reflectors are spaced at the desired spatial resolution of the optical fiber DAS.

公开(公告)号：US11719560B2

公开(公告)日：2023-08-08

申请号：US16934189

申请日：2020-07-21

申请人： Silixa Ltd.

发明人： Mahmoud Farhadiroushan ,  Tom Parker ,  Sergey Shatalin

IPC分类号： G01D5/353 ,  G01H9/00 ,  E21B47/135 ,  G01V8/16

CPC分类号： G01D5/3537 ,  G01D5/35306 ,  G01D5/35374 ,  G01H9/004 ,  E21B47/135 ,  G01V8/16

摘要： An optical fiber distributed acoustic sensor system makes use of a specially designed optical fiber to improve overall sensitivity of the system by a factor in excess of 10. This is achieved by inserting into the fiber weak broadband reflectors periodically along the fiber. The reflectors reflect 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%. To allow for temperate compensation to ensure that the same reflectivity is obtained if the temperature changes, the reflection bandwidth is relatively broadband. 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. The reflectors are spaced at the desired spatial resolution of the optical fiber DAS.

公开(公告)号：US20190064446A1

公开(公告)日：2019-02-28

申请号：US16117796

申请日：2018-08-30

申请人： YOKOGAWA ELECTRIC CORPORATION

发明人： Shin-ichirou Tezuka

IPC分类号： G02B6/36 ,  G01D5/353 ,  G01K11/32

CPC分类号： G02B6/3644 ,  G01D5/35374 ,  G01K11/32 ,  G01K2011/322 ,  G02B6/3636

摘要： An optical fiber sensor measuring apparatus includes a base portion, and a measuring optical fiber laid in the base portion. Adjacent linear portions of the measuring optical fiber are in contact with each other. The base portion may be plate-like. The measuring optical fiber may have the linear portion and a folded portion.

公开(公告)号：US20180356263A1

公开(公告)日：2018-12-13

申请号：US15780393

申请日：2016-12-02

申请人： Danmarks Tekniske Universitet

发明人： Kristian NIELSEN ,  Ole BANG

IPC分类号： G01D5/353

CPC分类号： G01D5/35383 ,  G01D5/3537 ,  G01D5/35374

摘要： The present invention relates to an optical measuring system comprising a polymer-based single-mode fibre-optic sensor system (102), an optical interrogator (101), and an optical arrangement (103) interconnecting the optical interrogator (101) and the polymer-based single-mode fibre-optic sensor system (102). The invention further relates to an optical interrogator adapted to be connected to a polymer-based single-mode fibre-optic sensor system via an optical arrangement. The interrogator comprises a broadband light source arrangement (104) and a spectrum analysing arrangement which receives and analyses light reflected from the polymer-based single-mode fibre-optic sensor system.

公开(公告)号：US20180231600A1

公开(公告)日：2018-08-16

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 ,  H01B7/02 ,  G02B6/26 ,  G01D5/353 ,  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.

公开(公告)号：US20180023731A1

公开(公告)日：2018-01-25

申请号：US15213850

申请日：2016-07-19

申请人： Schlumberger Technology Corporation

发明人： Joseph Varkey ,  Douglas Pipchuk

IPC分类号： F16L11/20 ,  F16L55/00 ,  H01B11/22 ,  G01D5/26

CPC分类号： G01D5/35374 ,  E21B17/206 ,  F16L11/127

摘要： A multi-layer coiled tube is provided. The multi-layer coiled tube may include an inner coiled tube. An outer tube may circumferentially and longitudinally surround the inner coiled tube. Conductors may be positioned between the inner coiled tube and the outer tube. The conductors may include electrical conductors and fiber optic cables.

公开(公告)号：US09612394B2

公开(公告)日：2017-04-04

申请号：US14779998

申请日：2014-03-18

申请人： Fraunhofer Gesellschaft Zur Förderung Der Angew. Forschung E.V.

发明人： Wolfgang Schade ,  Jörg Burgmeier

IPC分类号： G02B6/00 ,  G02B6/02 ,  G01D5/353 ,  G01B11/16 ,  G01D5/26

CPC分类号： G02B6/021 ,  G01B11/18 ,  G01D5/268 ,  G01D5/35316 ,  G01D5/35374 ,  G01D5/3538 ,  G01D5/35387 ,  G02B6/02042

摘要： The invention relates to a fiber-optic sensor comprising an optical waveguide having at least one first core and a cladding surrounding the first core, wherein the first core extends substantially over the entire length of the optical waveguide, wherein the sensor has at least one second core which is at least partly surrounded by the cladding, wherein the longitudinal extent of the second core is less than the total length of the optical waveguide and at least one Bragg grating is introduced into the second core. Furthermore, the invention relates to a use of the fiber-optic sensor.