公开(公告)号：US20250035494A1

公开(公告)日：2025-01-30

申请号：US18785627

申请日：2024-07-26

Applicant: Airbus Operations Limited

Inventor： Christopher WOOD

IPC: G01K11/3206 ,  G01F23/292

Abstract: A fiber-optic sensor including an optical fiber comprising a first Fiber Bragg Grating (FBG) arranged along a first part of the optical fiber; and a first element disposed on an outer surface of the optical fiber, the first element having a first coefficient of thermal expansion (CTE) different to a CTE of the optical fiber, and being configured to induce a change in strain across the FBG in response to a change in temperature of the fiber-optic sensor in the region of the first FBG, the first element bonded to the optical fiber at two first locations that are separated, along the optical fiber from one another by the first part and unbonded to the optical fiber along the first part.

公开(公告)号：US12174076B2

公开(公告)日：2024-12-24

申请号：US17624582

申请日：2019-07-30

Applicant: Mitsubishi Electric Corporation

Inventor： Masahiro Miyashita ,  Kazushi Sekine ,  Sohei Samejima

IPC: G01K1/143 ,  G01K11/32 ,  G01K11/3206

Abstract: To provide a temperature measurement system, which is capable of preventing distortion that occurs in a temperature measurement object from being transmitted to an optical fiber, and improving responsiveness of heat transfer from the temperature measurement object to the optical fiber. The temperature measurement system includes: a temperature measurement object; an optical fiber provided on the temperature measurement object; an intermediate material provided on the optical fiber; and a pressing jig which is provided on the temperature measurement object, and is configured to press the optical fiber against the temperature measurement object through intermediation of the intermediate material, wherein the optical fiber is expandable and contractible in a longitudinal direction of the optical fiber due to a change in a temperature of the optical fiber with respect to the temperature measurement object and the intermediate material.

公开(公告)号：US12158377B2

公开(公告)日：2024-12-03

申请号：US17767244

申请日：2020-10-08

Applicant: The University of Adelaide

Inventor： Stephen Christopher Warren-Smith ,  Heike Ebendorff-Heidepriem ,  Viet Linh Nguyen ,  Erik Peter Schartner

IPC: G01K11/3206 ,  G02B6/02

Abstract: A microstructured optical fiber sensor for sensing changes in a physical characteristic up to a predetermined temperature is disclosed. The sensor includes a microstructured optical fiber and a fiber Bragg grating formed in the microstructured optical fiber by generating a periodic modulation in the refractive index along a core region of the suspended core. The fiber Bragg grating is configured to produce a band reflection spectra including a fundamental mode and a plurality of higher order modes whose respective wavelengths vary in accordance with changes in the physical characteristic at the core region of the microstructured optical fiber. The microstructured optical fiber is configured to increase the confinement loss of the plurality of higher order modes of the band reflection spectra relative to the fundamental mode.

公开(公告)号：US20240337541A1

公开(公告)日：2024-10-10

申请号：US18681295

申请日：2022-08-05

Applicant: Massachusetts Institute of Technology

Inventor： Erica SALAZAR ,  Zachary HARTWIG

IPC: G01K11/3206 ,  G01K13/00

CPC classification number: G01K11/3206 ,  G01K13/006

Abstract: A high temperature superconductor (HTS) cable includes at least one HTS tape stack extending along a length of the HTS cable; and at least one optical fiber extending along the HTS cable. The at least one optical fiber has a plurality of gratings spaced apart from one another along the length of the HTS cable to detect a quench of the at least one HTS tape stack.

公开(公告)号：US12072243B2

公开(公告)日：2024-08-27

申请号：US17797843

申请日：2021-02-15

Applicant: NEC Corporation

Inventor： Keiichi Matsumoto ,  Hidemi Noguchi ,  Emmanuel Le Taillandier De Gabory

IPC: G01K11/3206 ,  G02B6/02

CPC classification number: G01K11/3206 ,  G02B6/02042

Abstract: Provided are a monitoring device, a monitoring method, and an optical transmission system which are adapted for an increase in the number of cores of a multi-core optical fiber transmission path and suitable for crosstalk monitoring. The monitoring device monitors a multi-core optical fiber transmission path having a plurality of use cores and at least one or more non-use cores, and comprises: an applying means for applying, at a start point of the multi-core optical fiber transmission path, dithering to signal light propagating in the use cores; a monitoring means for monitoring the power of the non-use cores at an input side of a relay in the multi-core optical fiber transmission path; and a separating means for separating a monitoring result from the monitoring means into power components from the plurality of use cores.

公开(公告)号：US20240280418A1

公开(公告)日：2024-08-22

申请号：US18171266

申请日：2023-02-17

Applicant: SAUDI ARABIAN OIL COMPANY

Inventor： Abdullah M. Arjani ,  Salman D. Mutairi ,  Sulainan A. Alwasel ,  Sultan D. Nufaiee

IPC: G01K11/324 ,  G01K1/022 ,  G01K1/024 ,  G01K11/3206

CPC classification number: G01K11/324 ,  G01K1/022 ,  G01K1/024 ,  G01K11/3206

Abstract: A system may include a fiber optic cable buried under a surface and a smart sensor module coupled to the fiber optic cable. A controller may be coupled to the smart sensor module. The smart sensor module includes a light source coupled to an end of the fiber optic cable and a detector coupled to the end of the fiber optic cable. The controller may manage a transmission of a pulse of light from the light source to launch the pulse of light into the fiber optic cable. The detector may receive a backscatter generated from the pulse of light scattered off fiber molecules of the fiber optic cable. The smart sensor module may determine a temperature of the fiber optic cable based on an intensity of the generated backscatter. The controller may send an alert when the determined temperature is outside a predetermined threshold range from a base temperature.

公开(公告)号：US12031859B2

公开(公告)日：2024-07-09

申请号：US17718416

申请日：2022-04-12

Applicant: VIAVI SOLUTIONS INC.

Inventor： Jeffery Stephen Graves ,  Vincent Lecoeuche ,  Andre Champavere

IPC: G01H9/00 ,  B60L58/18 ,  G01D21/02 ,  G01K11/32 ,  G01K11/3206 ,  G01K11/322 ,  G01K11/324 ,  G01K15/00 ,  G01L1/24 ,  G01L25/00 ,  G02B6/12 ,  G02B6/13

CPC classification number: G01H9/004 ,  B60L58/18 ,  G01D21/02 ,  G01K11/32 ,  G01K11/3206 ,  G01K11/322 ,  G01K11/324 ,  G01K15/005 ,  G01L1/243 ,  G02B6/13 ,  G01L25/00 ,  G02B2006/12138

Abstract: According to examples, an optical fiber-based sensing membrane may include at least one optical fiber, and a substrate. The at least one optical fiber may be integrated in the substrate. The substrate may include a thickness and a material property that are specified to ascertain, via the at least one optical fiber and for a device that is contiguously engaged with a surface of the substrate, includes the substrate embedded in the device, or includes the surface of the substrate at a predetermined distance from the device, a thermal and/or a mechanical property associated with the device, or a radiation level associated with a device environment.

公开(公告)号：US20240186124A1

公开(公告)日：2024-06-06

申请号：US18435923

申请日：2024-02-07

Applicant: iSenseCloud, Inc.

Inventor： William J. O'Banion ,  An-Dien Nguyen ,  Huy D. Nguyen

IPC: H01J37/32 ,  G01J3/02 ,  G01J3/18 ,  G01K1/14 ,  G01K11/3206 ,  G01N29/14 ,  G01N29/24 ,  G02B6/02 ,  G02B6/42 ,  H01L21/687 ,  H01S5/06 ,  H01S5/068 ,  H01S5/40

CPC classification number: H01J37/32917 ,  G01J3/0208 ,  G01K1/14 ,  G01K11/3206 ,  G01N29/14 ,  G01N29/2418 ,  G01N29/2462 ,  G02B6/0208 ,  G02B6/4204 ,  G01J3/18 ,  H01J2237/24585 ,  H01L21/68742 ,  H01S5/0617 ,  H01S5/06804 ,  H01S5/06808 ,  H01S5/4087

Abstract: An apparatuses relating generally to a test wafer, processing chambers, and method relating generally to monitoring or calibrating a processing chamber, are described. In one such an apparatus for a test wafer, there is a platform. An optical fiber with Fiber Bragg Grating sensors is located over the platform. A layer of material is located over the platform and over the optical fiber.

公开(公告)号：US11946814B2

公开(公告)日：2024-04-02

申请号：US17343824

申请日：2021-06-10

Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.

Inventor： Sean P. Rodrigues ,  Ercan Mehmet Dede

IPC: G01K11/3206 ,  G01K1/02 ,  G02B5/18 ,  E06B3/66 ,  E06B9/24 ,  F21V8/00 ,  G02B6/02 ,  G02B6/12 ,  G02F1/1333 ,  G02F1/1335

CPC classification number: G01K11/3206 ,  G01K1/02 ,  G02B5/18 ,  E06B3/66 ,  E06B9/24 ,  E06B2009/2405 ,  E06B2009/2417 ,  E06B2009/2464 ,  E06B2009/247 ,  G01K1/028 ,  G02B2005/1804 ,  G02B6/0063 ,  G02B6/0068 ,  G02B6/0095 ,  G02B6/02204 ,  G02B2006/12138 ,  G02F1/133342 ,  G02F1/133504

Abstract: A window can comprise a first side and a second side substantially parallel to the first side. The window can comprise an optical grating operatively positioned with respect to one of the first side and the second side. The optical grating can be used to determine a temperature at or near the respective one of the first side and the second side.

公开(公告)号：US11920464B2

公开(公告)日：2024-03-05

申请号：US17039054

申请日：2020-09-30

Applicant: HALLIBURTON ENERGY SERVICES, INC.

Inventor： Krishna Babu Yerubandi ,  John Paul Bir Singh ,  John L. Maida ,  Mikko Jaaskelainen

IPC: E21B47/07 ,  G01K1/02 ,  G01K11/3206 ,  G01K11/322 ,  G01K11/324

CPC classification number: E21B47/07 ,  G01K1/026 ,  G01K11/3206 ,  G01K11/322 ,  G01K11/324 ,  G01K2213/00

Abstract: Temperature data collected from a distributed temperature sensing system may be used to prepare a temporal thermal profile of the wellbore. The temporal thermal profile may be used to determine a generalized heat transfer coefficient (k) and/or a generalized geothermal profile (Tae). The temporal thermal profile and the generalized heat transfer coefficient (k) and/or the generalized geothermal profile (Tae) may be used to estimate thermal properties of a wellbore, such as well as fluid and flow characteristics. A heat of hydration index may also be determined based on the temporal thermal profile.