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    OPTICAL FIBER SENSOR SYSTEM
    91.
    发明申请
    OPTICAL FIBER SENSOR SYSTEM 审中-公开

    公开(公告)号：US20170363461A1

    公开(公告)日：2017-12-21

    申请号：US15628187

    申请日：2017-06-20

    Applicant: Sumitomo Electric Industries, Ltd.

    Inventor： Takafumi Ohtsuka

    IPC: G01H9/00 ,  G01L1/24

    CPC classification number: G01H9/006 ,  G01H9/004 ,  G01L1/243 ,  G01M11/3181

    Abstract: An optical fiber sensor system includes a light source, a modulation unit, an optical coupler, a polarization separator, a first polarization controller optically coupled to the polarization separator, and a first detection unit that includes a first optical detector that receives the first component, converts the first component into a first electrical signal, and detects stress. The first polarization controller controls a polarization state of light input to the polarization separator so that the first electrical signal exhibits a first-order response to the stress.

    Portable polarimetric fiber stress sensor system for visco-elastic and biomimetic material analysis
    92.
    发明授权
    Portable polarimetric fiber stress sensor system for visco-elastic and biomimetic material analysis 有权

    公开(公告)号：US09791333B2

    公开(公告)日：2017-10-17

    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 ,  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.

    OPTICAL WAVEGUIDE AND POSITION SENSOR USING SAME
    94.
    发明申请
    OPTICAL WAVEGUIDE AND POSITION SENSOR USING SAME 审中-公开

    公开(公告)号：US20170160873A1

    公开(公告)日：2017-06-08

    申请号：US15325479

    申请日：2015-07-17

    Applicant: NITTO DENKO CORPORATION

    Inventor： Ryoma Yoshioka ,  Yusuke Shimizu ,  Naoki Shibata

    IPC: G06F3/042 ,  G02B6/125 ,  G01B11/00 ,  G01L1/24

    CPC classification number: G06F3/0421 ,  G01B11/00 ,  G01L1/243 ,  G02B6/125

    Abstract: There are provided an optical waveguide including cores arranged in a lattice form in which intersection loss is further reduced where, at each intersection of the cores including first and second cores extending in two intersecting directions, the first core is separated by the second core and a gap is formed between the second core and each of the end portions of the first core, and a position sensor using the same. The position sensor includes an optical waveguide including cores arranged in a lattice form. At each intersection of the cores including first and second cores extending in two intersecting directions, the first core is separated by the second core, and a gap is formed between the second core and each of the end portions of the first core. The width of the end portions of the first core is greater than the width of the second core.

    Fiber-grating sensors having longitudinal-strain-inducing jackets and sensor systems and structures including such sensors
    96.
    发明授权
    Fiber-grating sensors having longitudinal-strain-inducing jackets and sensor systems and structures including such sensors 有权
    光纤光栅传感器具有纵向应变诱导套和包括这种传感器的传感器系统和结构

    公开(公告)号：US09453771B2

    公开(公告)日：2016-09-27

    申请号：US14262137

    申请日：2014-04-25

    Applicant: Wicor Holding AG

    Inventor： Eric Udd

    IPC: G02B6/00 ,  G01L1/24 ,  G02B6/02 ,  G02B6/12 ,  G01D5/353

    CPC classification number: G01L1/246 ,  G01D5/35316 ,  G01L1/243 ,  G02B6/022 ,  G02B2006/12135

    Abstract: A sensor comprising an optical fiber that includes a Bragg grating and a longitudinal-strain-inducing (LSI) jacket for inducing longitudinal strain into the optical fiber as a function of a transverse load, i.e., pressure or force. As the LSI jacket induces strain into the optical fiber, the fiber grating deforms, thereby changing the character of light reflected from the grating. The changes in character of the reflected light can be measured using suitable optical instrumentation. Additional physical characteristics that can be measured/sensed using an LSI-jacket-based sensor include moisture content/presence, chemical content/presence, and temperature. A transverse-load-sensing sensor can include transverse-load-applying structures that compress the LSI jacket under transverse load, causing the jacket to controllably elongate and thereby induce longitudinal strain into the optical fiber. Chemical and moisture LSI jackets can comprise materials that swell in the presence of the chemical or moisture.

    Abstract translation: 一种包括光纤的传感器，其包括作为横向负载（即压力或力）的函数的用于引入到光纤中的纵向应变的布拉格光栅和纵向应变诱发（LSI）护套。 随着LSI外壳在光纤中引起应变，光纤光栅变形，从而改变了从光栅反射的光的特性。 可以使用合适的光学仪器来测量反射光的特性变化。 可以使用基于LSI-套管的传感器测量/感测的附加物理特性包括水分含量/存在，化学含量/存在和温度。 横向载荷传感传感器可以包括在横向载荷下压缩LSI护套的横向载荷施加结构，从而使夹套可控制伸长，从而引起纵向应变进入光纤。 化学和水分LSI护套可以包括在化学或湿气存在下膨胀的材料。

    METHOD FOR MEASURING THE DEFORMATION OF A SPECIMEN USTING A FIBER OPTIC EXTENSOMETER
    99.
    发明申请
    METHOD FOR MEASURING THE DEFORMATION OF A SPECIMEN USTING A FIBER OPTIC EXTENSOMETER 有权
    用于测量使用光纤光学扩展器的样品变形的方法

    公开(公告)号：US20130240718A1

    公开(公告)日：2013-09-19

    申请号：US13611159

    申请日：2012-09-12

    Applicant: Nikhil Gupta ,  Nguyen Quang Nguyen

    Inventor： Nikhil Gupta ,  Nguyen Quang Nguyen

    IPC: G01B11/16

    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。

    Fiber-optic extensometer
    100.
    发明授权
    Fiber-optic extensometer 有权
    光纤引伸计

    公开(公告)号：US08428400B2

    公开(公告)日：2013-04-23

    申请号：US12855424

    申请日：2010-08-12

    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: 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: 具有单模光纤回路的引伸计。 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。

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