公开(公告)号：EP4019907B1

公开(公告)日：2024-06-26

申请号：EP21215161.7

申请日：2021-12-16

IPC分类号： G01D5/353 ,  G02B6/293

CPC分类号： G02B6/29319 ,  G01D5/35316

公开(公告)号：EP4377652A1

公开(公告)日：2024-06-05

申请号：EP22757984.4

申请日：2022-07-29

申请人： Commissariat à l'énergie atomique et aux énergies alternatives

发明人： MAURIN, Laurent

IPC分类号： G01L9/00 ,  G01L19/00 ,  G01D5/353 ,  G01K11/3206 ,  G01L11/02

CPC分类号： G01L19/0092 ,  G01L9/0039 ,  G01L9/0035 ,  G01K11/3206 ,  G01L11/025 ,  G01D5/35316 ,  G01D5/35374

公开(公告)号：EP3417247A1

公开(公告)日：2018-12-26

申请号：EP17752771.0

申请日：2017-02-16

申请人： National Research Council of Canada

发明人： GROBNIC, Dan ,  MIHAILOV, Stephen ,  WALKER, Robert ,  LU, Ping ,  DING, Huimin ,  COULAS, David ,  HNATOVSKY, Cyril

IPC分类号： G01D5/32 ,  G02B6/124 ,  G02B6/136 ,  G02B6/34

CPC分类号： G01D5/35316 ,  G02B6/124 ,  G02B6/136 ,  G02B6/34

摘要： Provided is an optical waveguide with an inscribed Bragg grating, where the Bragg grating is stable at high temperature, has low scattering loss and high reflectivity. Also provided is a method for inscribing a Bragg grating in an optical waveguide, the method comprising irradiating the optical waveguide with electromagnetic radiation from an ultrashort pulse duration laser of sufficient intensity to cause a permanent change in an index of refraction within a core of the optical waveguide, where the irradiating step is terminated prior to erasure of a Bragg resonance, and heating the optical waveguide to a temperature and for a duration sufficient to substantially remove a non-permanent grating formed in the optical waveguide by the irradiating step.

公开(公告)号：EP3359921A1

公开(公告)日：2018-08-15

申请号：EP16862623.2

申请日：2016-07-11

申请人： FSP LLC

发明人： SCHEMMANN, Marcel F

IPC分类号： G01D5/353 ,  G01L1/24

CPC分类号： G01L1/246 ,  G01D5/35316 ,  G01L11/025 ,  G01M3/246 ,  H01S3/06712 ,  H01S3/10061

摘要： A pressure sensor includes a single mode fiber, a Bragg grating, and a polarization controller to generate additional polarization states from an input polarization state of light injected into the fiber. The sensor utilizes logic to detect a uni-axial pressure applied to the fiber that shifts a reflection wavelength of a first Bragg grating polarization state relative to a Bragg reflection wavelength of a second polarization state orthogonal to the first polarization state.

公开(公告)号：EP3295185A1

公开(公告)日：2018-03-21

申请号：EP15729950

申请日：2015-05-08

申请人： FUGRO TECH B V

发明人： KNOPPERS GERMAN ENRIQUE ,  WAGEMAKERS THOMAS THEODORUS NICOLAAS JOHANNES ,  KARABACAK DEVREZ MEHMET ,  VAN BEELEN RUDOLF KLAAS ,  MEULBLOK BASTIAAN

IPC分类号： G01P15/093 ,  G01D5/353 ,  G01H9/00 ,  G01L1/24 ,  G01L5/00 ,  G01P15/08 ,  G01V1/18

CPC分类号： G01L1/246 ,  G01D5/35316 ,  G01D5/35377 ,  G01H9/004 ,  G01L5/0057 ,  G01P15/093 ,  G01P2015/0837 ,  G01P2015/0857

摘要： The invention is directed at an optical sensor device, comprising a sensing element for receiving an input action, an optical fiber comprising an intrinsic fiber optic sensor, and a transmission structure arranged for exerting a sensing action on the optical fiber in response to the input action, wherein the optical fiber is connected to a reference body and to the transmission structure with first and second connecting parts, the first and second connecting parts being located on either side of the intrinsic fiber optic sensor, wherein the transmission structure comprises a bi-stable spring having a first and a second stable deflection position and inbetween a negative stiffness range around an unstable equilibrium position, and wherein the optical fiber is pre-stressed thereby acting as a spring having a first spring constant of positive value to counteract a spring action of the bi-stable spring.

公开(公告)号：EP3295140A1

公开(公告)日：2018-03-21

申请号：EP15729949

申请日：2015-05-08

申请人： FUGRO TECH B V

发明人： SINGER JOHANNES MARIA ,  KARABACAK DEVREZ MEHMET ,  HEFFERNAN BILL

IPC分类号： G01L5/16 ,  G01B11/16 ,  G01D5/353 ,  G01L1/24 ,  G01L3/12 ,  G01L3/14 ,  G01L5/12 ,  G01L5/13 ,  G01M5/00 ,  G01M11/08

CPC分类号： G01L1/246 ,  G01B11/18 ,  G01D5/35316 ,  G01L3/12 ,  G01L3/14 ,  G01L5/12 ,  G01L5/133 ,  G01L5/166 ,  G01M5/0025 ,  G01M5/0091 ,  G01M11/085

摘要： A sensor system (10) and method for monitoring a powertrain (20) having a drive shaft (1). The sensor system (10) comprises an optical fibre (2) with a strain sensitive element (3). According to one aspect, a connection structure (4) is configured to hold at least a part of the optical fibre (2) with the strain sensitive element (3) at a radial distance (R2-R1) remote from the drive shaft (1) for amplifying the strain (S2) on the strain sensitive element (3) with respect to the strain (S1) on the drive shaft (1). According to a further aspect, at least three respective lengths of one or more optical fibres follow parallel, e.g. helical, paths with respect to each other to distinguish different strain forces.

公开(公告)号：EP2975366B1

公开(公告)日：2018-01-31

申请号：EP15174916.5

申请日：2015-07-01

申请人： Palo Alto Research Center, Incorporated

发明人： HEGYI, Alex ,  KIESEL, Peter ,  RAGHAVAN, Ajay

IPC分类号： G01D5/353 ,  G01R31/36 ,  G01L1/24 ,  G02B6/12 ,  G02B6/293

CPC分类号： G01D5/35383 ,  G01D5/35316 ,  G01D5/3539 ,  G01L1/246 ,  G01N2201/088 ,  G01R31/3606 ,  G02B6/12009 ,  G02B6/2938

摘要： An optical coupler includes at least one input waveguide and a plurality of output waveguides. The optical coupler spatially disperses optical signals carried on the input waveguide according to wavelength to the output waveguides. The input waveguides and the output waveguides are arranged to provide crosstalk between optical signals carried on the output waveguides.

公开(公告)号：EP2473822B1

公开(公告)日：2017-09-27

申请号：EP10762996.6

申请日：2010-08-19

申请人： Kloe S.A.

发明人： BRILLOUET, Nicolas ,  COUDRAY, Paul

IPC分类号： G01D5/353 ,  G01L1/24 ,  G01M11/08 ,  G01M5/00

CPC分类号： G01D5/35303 ,  G01D5/35316 ,  G01L1/246 ,  G01M5/0091 ,  G01M11/083

公开(公告)号：EP3144633A1

公开(公告)日：2017-03-22

申请号：EP16188939.9

申请日：2016-09-15

申请人： Technobis Group B.V.

发明人： Docter, Vincent Johannes ,  Tahvili, Mohammad Saeed

IPC分类号： G01B11/16 ,  G01D5/353

CPC分类号： G02B6/12023 ,  G01B11/165 ,  G01B11/168 ,  G01B11/18 ,  G01D5/35316 ,  G02B6/02195 ,  G02B6/12019 ,  G02B6/12033

摘要： A fiber Bragg grating interrogator assembly, comprising:
- an optical fiber (120) including a fiber Bragg grating (FBG; 122) having a variable Bragg wavelength (λ B ) and a dynamic range of interest (Δλ dyn,B ) over which the Bragg wavelength (λ B ) can shift during use;
- a light source (102) operably connected to the optical fiber (120), and configured to illuminate the fiber Bragg grating (122) to solicit a response therefrom; and
- an response analyzer (140), including:
- a spectrally selective device (142) having an input port (145) and a plurality of output ports (149-n), wherein the input port is operably connected to the optical fiber (120) and wherein each of the output ports is associated with a respective spectral range (Δλ n ), said spectrally selective device being configured to provide a spectral energy distribution of a response of the fiber Bragg grating received on the input port onto said output ports (149-n).

摘要翻译： 一种光纤布拉格光栅询问器组件，包括： - 光纤（120），包括具有可变布拉格波长（»B）和感兴趣的动态范围（“»dyn，B”）的光纤布拉格光栅（FBG; 122） 布拉格波长（»B）可在使用期间移动; - 光源（102），其可操作地连接到所述光纤（120），并且被配置为照亮所述光纤布拉格光栅（122）以征求其响应; 以及 - 响应分析器（140），包括： - 具有输入端口（145）和多个输出端口（149-n）的光谱选择性设备（142），其中所述输入端口可操作地连接到所述光纤 120），并且其中每个输出端口与相应的光谱范围（“n”）相关联，所述光谱选择性设备被配置为提供在输入端口上接收的光纤布拉格光栅的响应的光谱能量分布到所述输出 港口（149-n）。

公开(公告)号：EP2913638B1

公开(公告)日：2017-02-08

申请号：EP14195846.2

申请日：2014-12-02

申请人： Fuji Jukogyo Kabushiki Kaisha ,  The University of Tokyo

发明人： Soejima, Hideki ,  Okabe, Yoji ,  Wu, Qi

IPC分类号： G01H9/00 ,  G01N29/24 ,  G01D5/353

CPC分类号： G01N29/2418 ,  G01D5/35316 ,  G01H9/004 ,  G01N2291/023 ,  G01N2291/0289

摘要： There is provided a vibration detection apparatus and a vibration detection method. A vibration detection apparatus 1 includes a ring-shaped optical fiber 4, a fiber Brag grating (FBG) 6 and a detection system 3. The ring-shaped optical fiber 4 generates a laser beam propagating a ring shaped optical path. The FBG 6 is disposed in the ring-shaped optical fiber 4 such that the laser beam enters the FBG 6, and has a transmittance distribution characteristic of transmitted light in a wavelength direction, which changes in accordance with vibration of an object. The detection system 3 detects the vibration based on the transmitted light through the FBG 6.

摘要翻译： 提供了振动检测装置和振动检测方法。 振动检测装置1包括环形光纤4，光纤布拉格光栅（FBG）6和检测系统3.环形光纤4产生传播环形光路的激光束。 FBG 6设置在环形光纤4中，使得激光束进入FBG 6，并且具有根据物体的振动而变化的波长方向的透射光的透射率分布特性。 检测系统3通过FBG 6检测基于透射光的振动。