公开(公告)号：US12038311B1

公开(公告)日：2024-07-16

申请号：US18487278

申请日：2023-10-16

Applicant: SHANDONG UNIVERSITY

Inventor： Zhengfang Wang ,  Jing Wang ,  Qingmei Sui ,  Lei Jia

IPC: G01D5/38 ,  G01B11/16 ,  G01B11/24 ,  G01B11/26 ,  G01C9/00 ,  G01L1/24 ,  G01M11/08

CPC classification number: G01D5/38 ,  G01B11/16 ,  G01B11/165 ,  G01B11/24 ,  G01B11/26 ,  G01C9/00 ,  G01L1/246 ,  G01M11/088

Abstract: A self-correcting assemblable optical fiber sensing system for a displacement field and a correction method thereof are provided. The system includes multiple assemblable flexible optical fiber sensing devices for measuring displacement field; multiple inclination angle self-sensing connection devices for connecting between assemblable flexible optical fiber sensing devices, and an optical fiber demodulation device for obtaining strain data of the assemblable flexible optical fiber sensing devices and two-axis inclination angle data of the inclination angle self-sensing connection devices, and correcting the displacement field measured by the assemblable flexible optical fiber sensing devices. The assemblable flexible optical fiber sensing devices are connected between the inclination angle self-sensing connection devices, and the optical fiber demodulation device is connected to a free end of the inclination angle self-sensing connection device. In this situation, two-dimensional displacement field monitoring of the large-scale structure can be realized.

公开(公告)号：US12025514B2

公开(公告)日：2024-07-02

申请号：US16623224

申请日：2018-06-15

Applicant: FBGS TECHNOLOGIES GMBH ,  FBGS INTERNATIONAL NV

Inventor： Johan Vlekken ,  Bram Van Hoe ,  Eric Lindner

IPC: G01L1/24 ,  A61B5/06 ,  A61B17/34 ,  A61B34/20 ,  A61B34/30 ,  A61M25/01

CPC classification number: G01L1/246 ,  A61B5/065 ,  A61B17/3403 ,  A61B34/20 ,  A61B34/30 ,  A61M25/0105 ,  A61B17/3468 ,  A61B2034/2061 ,  A61M2025/0166

Abstract: An optical system comprises a multicore fiber comprising at least two cores of which each core comprises at least one Fiber Bragg Grating. The optical system also comprises a force transducing element being bendable in one or more directions and being fixed to the multicore fiber so as to transduce force applied to the force transducing element to the multicore fiber, resulting into a bending and/or compression and/or tension of the multicore fiber. The multicore fiber is connectable or connected to a measurement system for optically measuring the response of at least one Fiber Bragg Grating, for each of at least 2 cores of the multicore fiber, as a result of the multicore fiber bending and/or compression and/or tension for deriving a characteristic of the force acting on the position of the force transducing element of the optical system.

公开(公告)号：US11980504B2

公开(公告)日：2024-05-14

申请号：US17058630

申请日：2019-05-24

Applicant: Intuitive Surgical Operations, Inc.

Inventor： John Ryan Steger

IPC: A61B90/00 ,  A61B34/35 ,  G01L1/24

CPC classification number: A61B90/06 ,  A61B34/35 ,  G01L1/246 ,  A61B2090/064

Abstract: A force sensing device is provided for use with a surgical instrument shaft having a two degree-of-freedom wrist mounted end effector portion having a working surface; a housing defines an annular collar sized to snugly fit about the two degree-of-freedom wrist and defines a cap sized to snugly fit about the end effector portion; an optical fiber including a segment is embedded within the annular collar and including a segment embedded within the cap; a first fiber Bragg grating (FBG) formed in the segment of the optical fiber embedded within the cap.

公开(公告)号：US20240003765A1

公开(公告)日：2024-01-04

申请号：US18188967

申请日：2023-03-23

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01L1/24 ,  F17C13/02 ,  F17D5/00 ,  E21B47/007 ,  E21B47/135 ,  G02B6/02

CPC classification number: G01L1/246 ,  F17C13/02 ,  F17D5/00 ,  E21B47/007 ,  E21B47/135 ,  G02B6/02 ,  G02B6/0208 ,  G02B6/02395

Abstract: A system and method for detecting dynamic strain of a housing. The system includes an optical fiber linearly affixed along a surface of a length of the housing and an interrogator comprising a laser source and a photodetector. The optical fiber comprises at least one pair of fiber Bragg gratings (FBGs) tuned to reflect substantially identical wavelengths with a segment of the optical fiber extending between the FBGs. The segment of the optical fiber is linearly affixed along the surface of the housing. The interrogator is configured to perform interferometry by shining laser light along the optical fiber and detecting light reflected by the FBGs. The interrogator outputs dynamic strain measurements based on interferometry performed on the reflected light.

公开(公告)号：US11828586B2

公开(公告)日：2023-11-28

申请号：US17894718

申请日：2022-08-24

Applicant: Intuitive Surgical Operations, Inc.

Inventor： Mark E. Froggatt ,  Justin W. Klein ,  Dawn K. Gifford ,  Stephen T. Kreger

IPC: G01B11/24 ,  G01B11/16 ,  G01L1/24 ,  G01M11/00 ,  G01M11/02 ,  G02B6/02

CPC classification number: G01B11/24 ,  G01B11/16 ,  G01B11/168 ,  G01B11/18 ,  G01L1/242 ,  G01M11/025 ,  G01M11/31 ,  G01M11/3172 ,  G01M11/3181 ,  G01L1/246 ,  G02B6/02042

Abstract: A multi-core fiber includes multiple optical cores, and for each different core of a set of different cores of the multiple optical cores, a total change in optical length is detected. The total change in optical length represents an accumulation of all changes in optical length for multiple segments of that different core up to a point on the multi-core fiber. A difference is determined between the total changes in optical length for cores of the set of different cores. A twist parameter and/or a bend angle associated with the multi-core fiber at the point on the multi-core fiber is/are determined based on the difference.

公开(公告)号：US11775021B2

公开(公告)日：2023-10-03

申请号：US17404783

申请日：2021-08-17

Applicant: Apple Inc.

Inventor： Yakov G. Soskind ,  Mohammad Yeke Yazdandoost ,  Patrick B. Wright ,  Giovanni Gozzini

IPC: G06F1/16 ,  G06F3/042 ,  G01L1/24

CPC classification number: G06F1/1656 ,  G01L1/246 ,  G06F3/0421 ,  G06F2203/04109

Abstract: An electronic device may have an optical touch sensor that is insensitive to the presence of moisture. The display may present images through a display cover layer. A light source may illuminate an external object such as a user's finger when the object contacts a surface of the display cover layer. This creates scattered light that may be detected by an array of light sensors. A metasurface grating may be used to couple light from the light source into the display cover layer at an angle such that total internal reflection within the display cover layer is sustained across the display cover layer even when the display cover layer is immersed in water or otherwise exposed to moisture. Additional metasurface gratings may be formed on the display cover layer to redirect light propagating within the display cover layer away from edges that might otherwise defeat total internal reflection.

公开(公告)号：US11739632B2

公开(公告)日：2023-08-29

申请号：US17378360

申请日：2021-07-16

Applicant: Marc Samuelson

Inventor： Marc Samuelson

IPC: E21B47/007 ,  G01L1/24 ,  E21B17/02 ,  E21B47/135 ,  G01L1/22

CPC classification number: E21B47/135 ,  E21B17/028 ,  G01L1/22 ,  G01L1/246

Abstract: A method and apparatus for establishing a secure communication link between a first member and a second member in a wellbore. The apparatus includes a strain sensor and at least one processor. The strain sensor is at a mating end of the second member and measures a strain at the mating end. The at least one processor determines, from the strain, when a first force applied between the first member and the second member exceeds a first force threshold that indicates that the first member and the second member are in a first mating position in which a testable communication link is established between the first member and the second member. The at least one processor tests the testable communication link between the first member and the second member at the first mating position.

公开(公告)号：US20230221197A1

公开(公告)日：2023-07-13

申请号：US18182505

申请日：2023-03-13

Applicant: Astro Technology Group, LLC

Inventor： David Verl Brower

IPC: G01L1/24 ,  B63B35/44

CPC classification number: G01L1/246 ,  B63B35/4413 ,  B63B21/502

Abstract: Systems, devices and methods enable generation and monitoring of support platform structural conditions in a manner that overcomes drawbacks associated with conventional approaches (e.g., load cells) for generating and monitoring similar operating condition information. In preferred embodiments, such systems, devices and methods utilize fiber optic strain gauges (i.e., fiber optic sensors) in place of (e.g., retrofit/data replacement) or in combination with conventional load cells. The fiber optic sensors are strategically placed at a plurality of locations on one or more support bodies of a support platform. In preferred embodiments, the fiber optic strain gauges are placed in positions within a hull and/or one or more pontoons of an offshore platform. Such positions are selected whereby resulting operating condition data generated by the fiber optic strain gauges suitably replaces data received by conventionally constructed and located load cells of an offshore platform (e.g., a TLP).

公开(公告)号：US20230221195A1

公开(公告)日：2023-07-13

申请号：US18145983

申请日：2022-12-23

Applicant: SHINGINGWAY INDUSTRIAL CO., LTD.

Inventor： JUI-TING LEE

IPC: G01L1/24 ,  G01B11/02 ,  G01B11/26 ,  G01M5/00

CPC classification number: G01L1/246 ,  G01B11/02 ,  G01B11/26 ,  G01L1/247 ,  G01M5/0041

Abstract: The present invention discloses a distributed continuous high-accuracy bidirectional displacement fiber-optic measurement system and a measurement method thereof for measuring displacement of a measurement target, including a Brillouin analysis device connected with an optical fiber strain gauge, a fiber-optic sensor assembly including a reference fiber-optic sensor device and a plurality of fiber-optic sensor devices, and an operation module, the operation module is operable to receive the continuous data and the single-spot data transmitted from the Brillouin analysis device and the fiber-optic sensor devices, and to calculate an accurate displacement for each interval of the optical fiber strain gauge according to the continuous data and the single-spot data so as to form continuous displacement data. Thus, the present invention is economic in respect of cost and suits the need of the market application, and can be applied in a large area, and enhances the accuracy of measurement.

公开(公告)号：US11692888B2

公开(公告)日：2023-07-04

申请号：US17060211

申请日：2020-10-01

Applicant: Aktiebolaget SKF

Inventor： Wolfgang Glaentz ,  Sebastian Ziegler

IPC: F16C19/52 ,  F16C19/54 ,  G01L5/00 ,  G01L1/24 ,  G01M13/045

CPC classification number: G01L5/0009 ,  F16C19/522 ,  F16C19/527 ,  F16C19/542 ,  G01L1/246 ,  G01M13/045 ,  F16C2233/00

Abstract: Bearing unit providing a housing and at least one bearing mounted in the housing. The bearing unit includes at least one load sensing element and at least one vibration sensing element fixed on the housing.