公开(公告)号：US20230204441A1

公开(公告)日：2023-06-29

申请号：US18177904

申请日：2023-03-03

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Takashi FUJIHATA ,  Hideaki HASEGAWA ,  Takayori ITO ,  Hiroyuki TAMAOKA

IPC: G01L1/24

CPC classification number: G01L1/243

Abstract: An object detection device includes: an optical fiber at least partially including a sensor optical fiber configured to transmit light with a loss of 0.3 dB/m or more; and a light receiving unit configured to receive, from the optical fiber, the light received by the sensor optical fiber, wherein the object detection device is configured to detect an object based on an intensity of the light received by the light receiving unit.

公开(公告)号：US20190212628A1

公开(公告)日：2019-07-11

申请号：US15864284

申请日：2018-01-08

Applicant: Saudi Arabian Oil Company

Inventor： Damian Pablo San Roman Alerigi ,  Frode Hveding

IPC: G02F1/313 ,  G01H9/00 ,  G01L1/24 ,  G02F1/125 ,  G01V1/52 ,  G01D5/353 ,  G01V1/20 ,  G02B6/02 ,  G01V8/16

CPC classification number: G02F1/3134 ,  G01D5/35377 ,  G01D5/3538 ,  G01H9/004 ,  G01H9/006 ,  G01K5/48 ,  G01K11/32 ,  G01L1/242 ,  G01L1/243 ,  G01V1/208 ,  G01V1/52 ,  G01V8/16 ,  G02B6/02104 ,  G02F1/125

Abstract: A fiber optic cable assembly includes an elongate housing, a signal fiber placed inside the housing and extending longitudinally, and a plurality of sensing fibers placed inside the housing and extending longitudinally. The plurality of sensing fibers is placed around the signal fiber. Each of the plurality of sensing fibers carries a respective laser signal of a distinct frequency. The signal fiber carries one or more evanescent coupling signals responsive to the laser signals in the plurality of sensing fibers.

公开(公告)号：US09863825B2

公开(公告)日：2018-01-09

申请号：US15163264

申请日：2016-05-24

Applicant: Muthukumaran Packirisamy ,  Roozbeh Ahmadi ,  Javad Dargahi

Inventor： Muthukumaran Packirisamy ,  Roozbeh Ahmadi ,  Javad Dargahi

IPC: A61B34/30 ,  G01L1/24 ,  G01D5/353 ,  G01B11/16 ,  G01D5/26 ,  G01L1/16

CPC classification number: G01L1/242 ,  A61B34/30 ,  A61B34/76 ,  A61B2090/065 ,  G01B11/18 ,  G01D5/268 ,  G01D5/353 ,  G01L1/16 ,  G01L1/18 ,  G01L1/24 ,  G01L1/243 ,  G01M11/085

Abstract: A sensing element for sensing a mechanical property of a sample defining a sample surface using a contact force exerted the sample surface. The sensing element includes: a deformable element defining a contact surface and a deformable section in register with the contact surface, the deformable section being deformable between an undeformed configuration and a deformed configuration; a deformation sensor operatively coupled to the deformable section for sensing and quantifying a deformation of the deformable section between the deformed and undeformed configurations, the deformation sensor being an optical deformation sensor; and a force sensor operatively coupled to the deformable element for sensing the contact force exerted on the contact surface.

公开(公告)号：US20170343433A1

公开(公告)日：2017-11-30

申请号：US15620196

申请日：2017-06-12

Applicant: Optasense Holdings Limited

Inventor： David John Hill ,  Magnus McEwen-King ,  Roger Ian Crickmore

IPC: G01L1/24 ,  G02B6/44 ,  G01L11/02 ,  G01H9/00 ,  G02B6/02 ,  G01D5/353 ,  G02B6/032

CPC classification number: G01L1/243 ,  G01D5/3538 ,  G01H9/004 ,  G01L11/025 ,  G01V1/208 ,  G01V1/52 ,  G02B6/02 ,  G02B6/443 ,  G02B2006/0325

Abstract: Fiber optic cables with improved performance for use in distributed sensing, for instance in distributed acoustic sensors, are disclosed. In one embodiment a fiber optic cable (210) comprises a core (208) and cladding (206) disposed within a buffer material (202) surrounded by a jacket (204) and arranged so that the core is offset from the center of the cable. By offsetting the core from the center of the jacket any bending effects on the core can be maximized compared to the core being located at the center of the cable.

公开(公告)号：US20170292862A1

公开(公告)日：2017-10-12

申请号：US15516719

申请日：2015-10-08

Applicant: OPTASENSE HOLDINGS LIMITED

Inventor： Alastair Godfrey

IPC: G01D5/353 ,  G02B6/44 ,  G01H9/00 ,  G01K11/32 ,  G01L1/24

CPC classification number: G01D5/3538 ,  G01H9/004 ,  G01K11/32 ,  G01L1/243 ,  G01M5/0091 ,  G01R33/0327 ,  G02B6/4415 ,  G02B6/4432 ,  G02B6/4433

Abstract: This application relates to a fibre optic cable structure suitable for use as a sensing fibre optic for distributed acoustic sensing and having an improved sensitivity to transverse pressure waves. The application describes a fibre optic cable (300) having a longitudinal cable axis and comprising at least one optical fibre (301). The cable also comprises a compliant core material (303) mechanically coupled to the optical fibre(s), possible via a buffer (302) such that a longitudinal force acting on the compliant core material induces a longitudinal strain in the optical fibre(s). At least one deformable strain transformer (304) is coupled to the compliant core material and configured such that a force acting on the strain transformer in a direction transverse to the cable axis results in a deformation of the strain transformer thereby applying a longitudinal force to the compliant core material.

公开(公告)号：US09771794B2

公开(公告)日：2017-09-26

申请号：US14690203

申请日：2015-04-17

Applicant: Halliburton Energy Services, Inc.

Inventor： Bhargav Gajji ,  Ankit Purohit ,  Rahul Ramchandra Gaikwad ,  Ratish Suhas Kadam ,  Abhay Bodake

IPC: E21B47/007 ,  E21B47/135 ,  E21B49/00 ,  E21B47/00 ,  E21B47/01 ,  E21B47/12 ,  E21B17/00 ,  G01V8/16 ,  G01L1/24 ,  G01M11/08 ,  E21B47/06

CPC classification number: E21B49/003 ,  E21B17/006 ,  E21B47/0006 ,  E21B47/01 ,  E21B47/06 ,  E21B47/065 ,  E21B47/123 ,  G01L1/243 ,  G01L1/246 ,  G01M11/083 ,  G01V8/16

Abstract: A drilling optimization collar for use proximate a drilling tool within a wellbore includes a fiber optic sensor filament that is sized and configured to fit within a groove formed within the drilling optimization collar. The drilling optimization collar may be a pipe segment that is sized and configured to be installed in a drill string proximate the drilling tool, and may have a plurality of sensor elements. All or a portion of the sensor elements may be formed by discrete segments of the sensor filament, and as such, the sensor filament includes sensor elements that are configured to sense a condition of the wellbore and a load on the drilling optimization collar.

公开(公告)号：US09476294B2

公开(公告)日：2016-10-25

申请号：US12956777

申请日：2010-11-30

Applicant: Robert M. Harman ,  Philippe Legrand ,  Brooks Childers ,  Roger Duncan ,  Alan Reynolds ,  Sam Dippold

Inventor： Robert M. Harman ,  Philippe Legrand ,  Brooks Childers ,  Roger Duncan ,  Alan Reynolds ,  Sam Dippold

IPC: G01L1/24 ,  E21B47/06 ,  E21B47/12 ,  G01L11/02 ,  G01L19/00

CPC classification number: E21B47/06 ,  E21B47/123 ,  G01L1/243 ,  G01L11/025 ,  G01L19/0092

Abstract: An apparatus for estimating at least one parameter includes: a deformable member configured to deform in response to the at least one parameter; a housing surrounding at least a portion of an external surface of the deformable member to define an isolated region around the portion and an isolated surface of the deformable member; and at least one optical fiber sensor disposed on the isolated surface and held in an operable relationship with the isolated surface, the at least one optical fiber sensor configured to generate a signal in response to a deformation of the deformable member.

Abstract translation: 用于估计至少一个参数的装置包括：可变形构件，被配置为响应于所述至少一个参数而变形; 围绕所述可变形构件的外表面的至少一部分的壳体，以限定所述可变形构件的所述部分和隔离表面周围的隔离区域; 以及至少一个光纤传感器，其布置在所述隔离表面上并且与所述隔离表面保持可操作的关系，所述至少一个光纤传感器被配置为响应于所述可变形构件的变形而产生信号。

公开(公告)号：US09301690B2

公开(公告)日：2016-04-05

申请号：US13091655

申请日：2011-04-21

Applicant: Mehdi Razavi ,  Gangbing Song ,  Alireza Nazeri ,  Siu Chun Michael Ho

Inventor： Mehdi Razavi ,  Gangbing Song ,  Alireza Nazeri ,  Siu Chun Michael Ho

IPC: A61B5/05 ,  A61B5/00 ,  G01L1/24

CPC classification number: A61B5/0084 ,  A61B5/489 ,  A61B5/6848 ,  A61B2562/0233 ,  G01L1/243 ,  G01L1/246

Abstract: In an embodiment, an apparatus comprises a needle (e.g., hypodermic needle or trocar) and sensor (e.g., fiber Braggs grating sensor) coupled to a system to determine (e.g., in real time) stress and/or vibrations encountered by the needle. Consequently, various embodiments may (a) help identify nearby vessels, (b) determine whether the needle penetrated a hollow body structure, and (c) accurately guide needles towards a target structure (e.g., vessel). Other embodiments are described herein.

Abstract translation: 在一个实施例中，装置包括联接到系统的针（例如，皮下注射针或套管针）和传感器（例如，光纤布拉格光栅传感器），以确定（例如，实时）针头所遇到的应力和/或振动。 因此，各种实施例可以（a）帮助识别附近的血管，（b）确定刺针是否穿透中空的身体结构，以及（c）准确地将针导向目标结构（例如血管）。 本文描述了其它实施例。

公开(公告)号：US09157815B2

公开(公告)日：2015-10-13

申请号：US13524794

申请日：2012-06-15

Applicant: Ki Uk Kyung ,  Young Sung Kim ,  Sun Tak Park ,  Il Yeon Cho ,  Jun Seok Park

Inventor： Ki Uk Kyung ,  Young Sung Kim ,  Sun Tak Park ,  Il Yeon Cho ,  Jun Seok Park

IPC: G01L9/00 ,  G01L1/24 ,  G06F3/042

CPC classification number: G06F3/042 ,  G01D5/268 ,  G01L1/243 ,  G01L9/0077 ,  G06F3/0421 ,  G06F2203/04109

Abstract: Disclosed are an apparatus and a method for sensing pressure using an optical waveguide sensor. The apparatus for sensing pressure using an optical waveguide sensor, includes: a light source radiating light; an optical waveguide panel emitting some of the radiated light outside through a plurality of light transmitting regions previously formed, and changing an amount of totally reflected light according to pressure applied to at least one of the plurality of light transmitting regions; a detector detecting the amount of light; and an analyzer determining intensity and a location of the pressure according to the detected amount of light.

Abstract translation: 公开了一种使用光波导传感器感测压力的装置和方法。 用于使用光波导传感器感测压力的装置包括：光源照射光; 通过预先形成的多个透光区域向外部发射一些辐射光的光波导面板，并且根据施加到多个透光区域中的至少一个的压力来改变全反射光量; 检测光量的检测器; 以及根据检测到的光量来确定压力的强度和位置的分析器。

公开(公告)号：US08861912B2

公开(公告)日：2014-10-14

申请号：US13476622

申请日：2012-05-21

Applicant: Jeong I. Kim ,  Daniel Kominsky ,  Gary Pickrell ,  Ahmad Safaai-Jazi ,  Roger H Stolen ,  Anbo Wang

Inventor： Jeong I. Kim ,  Daniel Kominsky ,  Gary Pickrell ,  Ahmad Safaai-Jazi ,  Roger H Stolen ,  Anbo Wang

IPC: G02B6/032 ,  G02B6/02 ,  C03B37/027 ,  C03C13/04 ,  C03B37/016 ,  C03B37/012 ,  G01L1/24 ,  C03C11/00

CPC classification number: G02B6/02385 ,  C03B37/01297 ,  C03B37/016 ,  C03B37/02781 ,  C03B2203/14 ,  C03B2203/42 ,  C03C11/007 ,  C03C13/04 ,  G01L1/243 ,  G02B6/02295 ,  G02B6/02333 ,  G02B6/02338 ,  G02B6/02357 ,  G02B6/02366 ,  G02B6/032

Abstract: A random array of holes is created in an optical fiber by gas generated during fiber drawing. The gas forms bubbles which are drawn into long, microscopic holes. The gas is created by a gas generating material such as silicon nitride. Silicon nitride oxidizes to produce nitrogen oxides when heated. The gas generating material can alternatively be silicon carbide or other nitrides or carbides. The random holes can provide cladding for optical confinement when located around a fiber core. The random holes can also be present in the fiber core. The fibers can be made of silica. The present random hole fibers are particularly useful as pressure sensors since they experience a large wavelength dependant increase in optical loss when pressure or force is applied.

Abstract translation: 在纤维拉伸中产生的气体在光纤中产生随机阵列的孔。 气体形成气泡，其被吸入长的微观孔中。 气体由诸如氮化硅的气体发生材料产生。 氮化硅在加热时氧化生成氮氧化物。 气体发生材料可以替代地是碳化硅或其它氮化物或碳化物。 当位于纤维芯周围时，随机孔可以提供用于光学限制的包层。 随机孔也可以存在于纤维芯中。 纤维可以由二氧化硅制成。 当前的随机孔纤维作为压力传感器是特别有用的，因为当施加压力或力时，它们经历大的波长依赖性的光学损失增加。