公开(公告)号：US20170038267A1

公开(公告)日：2017-02-09

申请号：US15178795

申请日：2016-06-10

Applicant: UNIVERSITY OF SOUTHERN CALIFORNIA

Inventor： ANDREA M. ARMANI ,  MARK C. HARRISON ,  ALEXA WATKINS HUDNUT

IPC: G01L1/24 ,  G01N3/08 ,  G02B6/024

CPC classification number: G01L1/243 ,  G02B6/024 ,  G02B2006/12138

Abstract: An all-optical fiber sensor apparatus includes a light source and an in-line fiber polarizer that polarizes light received from the light source. The in-line fiber polarizer outputs light in a first polarization state which is directed to a polarization-maintaining fiber. After receiving the light in a first polarization state, the polarization-maintaining fiber transmits the light such that the light exits as light in a second polarization state. During measurements, the polarization-maintaining fiber contacts a test sample. A compression device compresses the test sample. The compression device applies a time varying force to the test sample in which the force is sequentially increased. A polarimeter receives the light in a second polarization state and outputs polarization state data for the light in a second polarization state. Finally, a data processor is in communication with the polarimeter to receive and stores the polarization state data.

Abstract translation: 全光纤传感器装置包括光源和使从光源接收的光偏振的直列光纤偏振器。 直列光纤偏振器输出针对偏振保持光纤的第一偏振状态的光。 在接收到第一偏振状态的光之后，偏振保持光纤透射光，使得光以第二偏振状态的光射出。 在测量期间，偏振保持光纤接触测试样品。 压缩装置压缩测试样品。 压缩装置对其中力依次增加的测试样品施加时变力。 偏振器接收第二偏振状态的光并输出第二偏振态的光的偏振状态数据。 最后，数据处理器与偏振计通信以接收和存储极化状态数据。

公开(公告)号：US09476699B2

公开(公告)日：2016-10-25

申请号：US14640018

申请日：2015-03-05

Applicant: General Photonics Corporation

Inventor： Xiaotian Steve Yao

IPC: G01B11/16 ,  G01M11/00 ,  G01K11/32

CPC classification number: G01B11/161 ,  G01B11/168 ,  G01D5/266 ,  G01K11/32 ,  G01L1/242 ,  G01L1/243 ,  G01L25/00 ,  G01M11/331

Abstract: Techniques and devices for measuring stress, strain, or temperature based on polarization crosstalk analysis in birefringence optical birefringent media including polarization maintaining fiber. The disclosed techniques and devices can be implemented to measure polarization crosstalk distribution in polarization maintaining fiber by placing the PM fiber in a 1-dimensional or 2-dimensional configuration for sensing temperature, stress or strain in the PM fiber at different locations along the fiber with a high spatial sensing resolution. In some implementations, the disclosed techniques and devices can be implemented to simultaneously measure stress, strain and temperature from analyzing the probe light. For example, both temperature and stress/strain can be simultaneously measured by using the same sensors to extract and separate temperature measurements from stress/strain measurements.

Abstract translation: 基于双折射光学双折射介质（包括偏光保持光纤）的偏振串扰分析测量应力，应变或温度的技术和装置。 可以实现所公开的技术和装置，以通过将PM光纤放置在一维或二维构型中来测量偏振维持光纤中的偏振串扰分布，以便在沿着光纤的不同位置处感测PM光纤中的温度，应力或应变， 高空间感测分辨率。 在一些实施方案中，可以实现所公开的技术和装置，以从分析探测光同时测量应力，应变和温度。 例如，可以通过使用相同的传感器来同时测量温度和应力/应变，以从应力/应变测量中提取和分离温度测量值。

公开(公告)号：US20150355040A1

公开(公告)日：2015-12-10

申请号：US14762792

申请日：2014-01-22

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Donald J. Sirbuly ,  Sadik C. Esener ,  Ilsun Yoon

IPC: G01L1/24

CPC classification number: G01L1/243 ,  G01L1/242

Abstract: Methods, structures, devices and systems are disclosed for implementing a fiber optic force sensing transducer. In one aspect, an exemplary fiber optic force sensing transducer device includes an optical fiber coated by at least one layer of a polyelectrolyte material that utilizes the movement of optical structures coupled to the external polyelectrolyte layer in an evanescent field produced by the optical fiber to detect forces imposing on the fiber. In one aspect, an optical sensing device includes an optical waveguide that internally guides light, one or more layers formed outside the optical waveguide within an evanescent field of the guided light in the optical waveguide, and one or more optical structures coupled to the one or more layers in the evanescent field to emit light based on interaction with the evanescent field to indicate a position of an optical structure relative to an external surface of the optical waveguide.

Abstract translation: 公开了用于实现光纤力感测传感器的方法，结构，装置和系统。 在一个方面，一种示例性光纤力感测换能器装置包括由至少一层聚电解质材料涂覆的光纤，该光纤利用由光纤产生的消逝场中耦合到外部聚电解质层的光学结构的运动来检测 力量强加在纤维上。 在一个方面，一种光学感测装置包括光波导，其内部引导光，在光波导内的引导光的消逝场内形成在光波导外部的一个或多个层，以及耦合到该光波导中的一个或多个光学结构 ev逝场中的更多层基于与渐逝场的相互作用发光，以指示光学结构相对于光波导的外表面的位置。

公开(公告)号：US08724935B2

公开(公告)日：2014-05-13

申请号：US12922001

申请日：2009-03-11

Applicant: John William Arkwright ,  Ian Underhill ,  Neil Blenman

Inventor： John William Arkwright ,  Ian Underhill ,  Neil Blenman

IPC: G02B6/00 ,  G02B6/34 ,  G01J1/04 ,  G02B6/124 ,  G01D5/353 ,  G01L1/24

CPC classification number: G02B6/124 ,  A61B5/01 ,  A61B5/02154 ,  A61B5/036 ,  A61B6/12 ,  A61B2562/0247 ,  A61B2562/0266 ,  A61B2562/0271 ,  G01D5/353 ,  G01D5/35316 ,  G01D5/35387 ,  G01L1/243 ,  G01L1/246 ,  G01L1/247 ,  G01L9/0077 ,  G02B6/2932

Abstract: The present disclosure provides an optical device comprising a first optical fiber portion having a first region and further regions between which the first region is positioned. The optical device also comprises a second optical fiber portion having a second region and further regions between which the second region is positioned. Further, the optical fiber comprises at least one member to which the first and second optical fiber portions are attached at the first and second regions. The first and second regions are positioned at opposite sides of an area defined between the first and second regions and spaced apart from each other by a first distance and wherein adjacent further regions are spaced apart by a second distance that is smaller than the first distance.

Abstract translation: 本公开提供了一种光学装置，其包括具有第一区域的第一光纤部分和位于第一区域之间的其它区域。 该光学装置还包括具有第二区域的第二光纤部分和位于第二区域之间的其它区域。 此外，光纤包括在第一和第二区域处附接有第一和第二光纤部分的至少一个构件。 第一和第二区域位于限定在第一和第二区域之间并且彼此间隔开第一距离的区域的相对侧上，并且其中相邻的另外的区域间隔开小于第一距离的第二距离。

公开(公告)号：US08649638B2

公开(公告)日：2014-02-11

申请号：US13611159

申请日：2012-09-12

Applicant: Nikhil Gupta ,  Nguyen Quang Nguyen

Inventor： Nikhil Gupta ,  Nguyen Quang Nguyen

IPC: G02B6/00

CPC classification number: G01B11/16 ,  G01L1/243 ,  G01M5/0033 ,  G01M5/0091 ,  Y02B10/30

Abstract: A method for measuring the deformation of a specimen using an extensometer having a loop of a single-mode optical fiber. At least two points of the loop are attached to desired locations on a specimen. Light is transmitted through the loop and the transmitted optical power is measured by a photodetector. The deformation of the specimen causes the size and shape of the loop to change, which changes the transmitted optical power. The change in optical power is related to extension or compression using calibration curves. The sensor works on the principle of transmitted power modulation through the curved section.

Abstract translation: 一种使用具有单模光纤回路的引伸计测量试样变形的方法。 循环的至少两个点附着到样本上的期望位置。 光通过环路传输，透射光功率由光电检测器测量。 样品的变形导致环路的尺寸和形状发生变化，这会改变传输的光功率。 光功率的变化与使用校准曲线的扩展或压缩有关。 传感器的工作原理是透过功率调制通过弯曲部分。

公开(公告)号：US20130209024A1

公开(公告)日：2013-08-15

申请号：US13763683

申请日：2013-02-10

Applicant: Draka Holding N.V.

Inventor： Mark Edmund Lowell ,  Tyler Louis Angers ,  Jan Wigger Jonker ,  Kendall Waterman

IPC: G01L1/24

CPC classification number: G01L1/242 ,  G01L1/243

Abstract: Strain sensor, including an elongated protective encasing (5) surrounding an inner space, and an optical fiber (3) extending through the encasing (5), the fiber (3) at least including a fiber core (3a) and a fiber cladding (3b), wherein a cured filler material fills (4) at least part of a space between the fiber (3) and the protective encasing (5), the cured filler material (4) being configured for allowing strain coupling between the protective encasing (5) and the fiber (3), wherein an outer diameter of the fiber (3) is at least about 250 μm, and wherein the cured filler material (4) is one or more of: a flexible material, a resilient material, and a material having a shore A hardness that is lower than about 50. The invention also provides a method and system for manufacturing a strain sensor.

Abstract translation: 应变传感器，包括围绕内部空间的细长保护性封装（5）和延伸穿过封装（5）的光纤（3），所述光纤（3）至少包括光纤芯（3a）和光纤覆层 3b），其中固化的填充材料填充（4）光纤（3）和保护性封装（5）之间的空间的至少一部分，固化的填充材料（4）构造成允许保护性封装 5）和所述纤维（3），其中所述纤维（3）的外径为至少约250μm，并且其中所述固化的填充材料（4）为以下中的一种或多种：柔性材料，弹性材料和 具有低于约50的Shore A硬度的材料。本发明还提供了一种用于制造应变传感器的方法和系统。

公开(公告)号：US20120318074A1

公开(公告)日：2012-12-20

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: G01L1/24

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：US20120123702A1

公开(公告)日：2012-05-17

申请号：US12947066

申请日：2010-11-16

Applicant: Xin Chen ,  Ming-Jun Li ,  Anping Li ,  Daniel Aloysius Nolan

Inventor： Xin Chen ,  Ming-Jun Li ,  Anping Li ,  Daniel Aloysius Nolan

IPC: G06F19/00 ,  G01K13/00 ,  G01L1/00

CPC classification number: G01L1/243 ,  G01K11/32 ,  G01K2011/322 ,  G01L1/242

Abstract: A system for simultaneously determining strain and temperature characteristics of an object comprising: (i) at least one optical fiber having at least two Brillouin peaks; (ii) at least one connector securing the optical fiber to the object to be monitored; (iii) a laser positioned to provide laser light to said at least one optical fiber; (iv) a device measuring frequencies of said at least two Brillouin peaks, and determining frequency shifts of said at least two Brillouin peaks for said at least one optical fiber along the length of fiber; and (v) a system calculating strain and temperature characteristics along said fiber, based on the coefficients of strain and temperature as well as the measured Brillouin frequency shifts for said optical fiber along the length of said optical fiber.

Abstract translation: 一种用于同时确定物体的应变和温度特性的系统，包括：（i）至少一个具有至少两个布里渊峰的光纤; （ii）至少一个将光纤固定到待监测对象的连接器; （iii）定位成向所述至少一个光纤提供激光的激光器; （iv）测量所述至少两个布里渊峰的频率的装置，以及确定沿所述光纤长度的所述至少一个光纤的所述至少两个布里渊峰的频移; 以及（v）基于应变和温度的系数以及所述光纤沿着所述光纤的长度测量的布里渊频移的系统来计算沿着所述光纤的应变和温度特性的系统。

公开(公告)号：US20120087619A1

公开(公告)日：2012-04-12

申请号：US13375596

申请日：2010-05-26

Applicant: Alan John Rogers

Inventor： Alan John Rogers

IPC: G02B6/02

CPC classification number: G01L11/025 ,  G01L1/243 ,  G02B6/105

Abstract: An optical fibre cable for distributed fibre sensing of fluid pressure is disclosed. There are also disclosed a method and an apparatus for distributed fibre sensing of fluid pressure using the optical fibre cable. The optical fibre cable is adapted for distributed pressure sensing, and comprises: one or more optical fibres (120); and a buffer (130) surrounding the one or more optical fibres and adapted to deform asymmetrically under isotropic pressure (P) such that the fibre experiences asymmetric strain changing the birefringence of the one or more optical fibres. The optical fibres incorporated in the cable may be conventional single mode optical fibres. The optical fibre cable may be used to determine a pressure distribution along the length of the cable. The cable, apparatus or method may be used to detect pressures over long distances such as in pipes, pipelines, or wells.

Abstract translation: 公开了一种用于流体压力分布式光纤传感的光缆。 还公开了一种使用光纤电缆进行流体压力的分布式光纤感测的方法和装置。 该光缆适用于分布式压力感测，并包括：一根或多根光纤（120）; 以及围绕所述一个或多个光纤并且适于在各向同性压力（P）下不对称地变形的缓冲器（130），使得所述光纤经历改变所述一个或多个光纤的双折射的不对称应变。 结合在电缆中的光纤可以是常规的单模光纤。 光纤电缆可用于确定沿电缆长度的压力分布。 电缆，设备或方法可用于检测长距离的压力，例如在管道，管道或井中。

公开(公告)号：US20100284646A1

公开(公告)日：2010-11-11

申请号：US12564370

申请日：2009-09-22

Applicant: Chia-Chin CHIANG ,  Li-Ren Tsai

Inventor： Chia-Chin CHIANG ,  Li-Ren Tsai

IPC: G02B6/00 ,  G02B6/34

CPC classification number: G02B6/02204 ,  G01K11/3206 ,  G01L1/243 ,  G01L1/246 ,  G01M11/088

Abstract: A fiber optic grating measuring device includes a wide-band light source, an optical coupler coupled to the wide-band light source, and an output unit. A long-period fiber grating includes a first end coupled to the optical coupler and a second end coupled to the output unit. A first fiber Bragg grating is coupled to the optical coupler. The first fiber Bragg grating serves as a measuring terminal and is adapted to be mounted on an object having a physical quantity, such as a strain or temperature, to be measured by the fiber optic grating measuring device. A second fiber Bragg grating is coupled to the optical coupler. The second fiber Bragg grating serves as a free terminal and is located adjacent to the first fiber Bragg grating. The second fiber Bragg grating compensates an error resulting from a temperature change to increase the measuring accuracy.

Abstract translation: 光纤光栅测量装置包括宽带光源，耦合到宽带光源的光耦合器和输出单元。 长周期光纤光栅包括耦合到光耦合器的第一端和耦合到输出单元的第二端。 第一光纤布拉格光栅耦合到光耦合器。 第一光纤布拉格光栅用作测量端子，并且适于安装在具有物理量（例如应变或温度）的物体上以由光纤光栅测量装置测量。 第二光纤布拉格光栅耦合到光耦合器。 第二光纤布拉格光栅用作自由端子并且位于第一光纤布拉格光栅附近。 第二光纤布拉格光栅补偿由温度变化引起的误差，以提高测量精度。