公开(公告)号：US12241794B2

公开(公告)日：2025-03-04

申请号：US17655605

申请日：2022-03-21

Applicant: SAAB AB

Inventor： Roy Josefsson ,  Daniel Eckerström

IPC: G01K11/3206 ,  G01D3/10 ,  G01D5/353 ,  G01K11/32 ,  G01L1/24 ,  G01M3/00 ,  G01M3/38

Abstract: Embodiments of the present invention relate to determining temperature, pressure, strain, or other changes of an optical fibre (250) having Fiber Bragg Grating (FBG) patterns provided in at least one portion (Portion 1) of said optical fibre (250), said optical fibre (250) being connected between a first detector arrangement (210) and a second detector arrangement (220).

公开(公告)号：US12031871B2

公开(公告)日：2024-07-09

申请号：US17647190

申请日：2022-01-06

Applicant: SAAB AB

Inventor： Roy Josefsson ,  Daniel Eckerstroem

IPC: G01K11/3206 ,  G01D3/10 ,  G01D5/353 ,  G01K11/32 ,  G01L1/24 ,  G01M3/00 ,  G01M3/38

CPC classification number: G01K11/3206 ,  G01D3/10 ,  G01D5/35316 ,  G01D5/35387 ,  G01D5/3539 ,  G01K11/32 ,  G01L1/246 ,  G01M3/002 ,  G01M3/38

Abstract: A method is provided for determining temperature changes of an optical fibre having Fiber Bragg Grating patterns provided in at least one portion of the optical fibre. The method involves: emitting light into the optical fibre in a first direction from a first detector arrangement, receiving reflections from the patterns of such emitted light by the first detector arrangement, and processing the reflections for determining a current temperature change related to the optical fibre; and on the basis of predetermined criteria, emitting light into the optical fibre in an opposite, second, direction from a second detector arrangement, receiving reflections from the patterns of such emitted light by the second detector arrangement, and processing the reflections for determining a current temperature change related to the optical fibre. A computer program product comprising program code for implementing the above-described method is also provided, along with an associated system and platform.

公开(公告)号：US11248969B2

公开(公告)日：2022-02-15

申请号：US16269776

申请日：2019-02-07

Applicant: SAAB AB

Inventor： Roy Josefsson ,  Daniel Eckerstroem

IPC: G01K11/3206 ,  G01D5/353 ,  G01D3/10

Abstract: A method is provided for determining temperature changes of an optical fibre having Fiber Bragg Grating (FBG) patterns provided in at least one portion (Portion 1) of the optical fibre. The optical fibre is connected between a first detector arrangement and a second detector arrangement. Light is emitted into the optical fibre in a first direction from the first detector arrangement, which receives reflections from the FBG patterns of the emitted light. The reflections are processed for determining a current temperature change related to the optical fibre. On the basis of predetermined criteria, light is emitted into the optical fibre in an opposite second, direction from the second detector arrangement. The second detector arrangement receives reflections from the FBG patterns of the light emitted in the second direction and the reflections are processed for determining a current temperature change related to the optical fibre.