公开(公告)号：US20240308557A1

公开(公告)日：2024-09-19

申请号：US18275607

申请日：2022-01-28

Applicant: FOCUS SENSORS LIMITED

Inventor： Edward Austin ,  Toby Fisher ,  Stephen Desbruslais ,  Kit Chambers

IPC: B61L23/04 ,  G01L1/24

CPC classification number: B61L23/047 ,  G01L1/242

Abstract: Apparatus and methods for determining ground stability measurements utilising active sources. In an example a distributed optical sensor detects stains along a length of a railway line. One or more trains provide active sources. The static strain before and after passage of the active source is utilised to determine ground stability. Measurements may be normalised based on characteristics of the active source.

公开(公告)号：US12092537B2

公开(公告)日：2024-09-17

申请号：US18357182

申请日：2023-07-24

Applicant: FUJIFILM Corporation

Inventor： Masahiro Hatta ,  Hiroshi Kawakami

IPC: G01L1/24

CPC classification number: G01L1/247 ,  G01L1/242

Abstract: Provided is a pressure measuring material having a substrate and a pressure-sensitive layer, wherein the pressure-sensitive layer contains a polymer matrix containing a polymer compound having a molecular weight of 1,000 or more, and microcapsules encapsulating an electron-donating dye precursor and a solvent, and an electron-accepting compound. The pressure-sensitive layer has a color development-inducing layer having the electron-accepting compound and the polymer matrix and a color-developing layer having the microcapsules. A thickness of the color-developing layer is equal to or less than ½ of a thickness of the color development-inducing layer.

公开(公告)号：US12025488B2

公开(公告)日：2024-07-02

申请号：US18126409

申请日：2023-03-25

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: G01H9/00 ,  G01K11/32 ,  G01L1/24

CPC classification number: G01H9/004 ,  G01K11/32 ,  G01L1/242

Abstract: Distributed fiber optic sensing systems (DFOS) methods, and structures that employ DVS/DAS point sensors and a two-stage processing methodology/structure that advantageously enable point sensors to send sensor data at any time—thereby providing significant processing advantages over the prior art.

公开(公告)号：US20240201032A1

公开(公告)日：2024-06-20

申请号：US18066019

申请日：2022-12-14

Applicant: ARAMCO SERVICES COMPANY

Inventor： Seth Busetti ,  Arpita Bathija ,  Harold Merry

IPC: G01L1/24 ,  E21B47/01 ,  E21B47/135 ,  G01K11/3206

CPC classification number: G01L1/242 ,  E21B47/01 ,  E21B47/135 ,  G01K11/3206

Abstract: A system includes a plug standard formed of a geomaterial, a fiber optic cable and a support lattice embedded within the plug standard, and a joint attached to an end of the fiber optic cable outside of the plug standard. The fiber optic cable captures at least strain measurements and temperature measurements of the plug standard. The support lattice supports the fiber optic cable within the plug standard, and the joint connects the fiber optic cable with a fiber optic interrogator.

公开(公告)号：US12013297B2

公开(公告)日：2024-06-18

申请号：US17968922

申请日：2022-10-19

Applicant: National Central University

Inventor： Chih-Chung Chung ,  Jui-Ting Lee ,  Zih-Yi Li ,  Muhammad Saqlain

IPC: E02D1/00 ,  G01K11/322 ,  G01L1/24

CPC classification number: G01L1/242 ,  E02D1/00 ,  G01K11/322

Abstract: The present invention relates to a stratum deformation monitoring device. The device includes a working tube having an outer surface and an in-tube space and buried into a target stratum; a plurality of deformation monitoring rings, each of which the plurality of deformation monitoring rings are movably assembled on the outer surface of the working tube in equal intervals or unequal intervals; and at least one strain optical fiber movably assembled on the outer surface of the working tube by securing on the plurality of deformation monitoring rings.

公开(公告)号：US11976963B2

公开(公告)日：2024-05-07

申请号：US17612910

申请日：2020-05-19

Applicant: HOASYS

Inventor： Umberto Bortolozzo

IPC: G01H9/00 ,  G01D5/353 ,  G01L1/24 ,  G01L1/25 ,  G01V1/22

CPC classification number: G01H9/004 ,  G01D5/35309 ,  G01L1/242 ,  G01L1/255 ,  G01V1/226

Abstract: Disclosed is an acoustic sensor including: —a component having an input and an output, the component being able to conduct light waves in a plurality of propagation modes between the input and the output, the component converting an acoustic signal to be measured into a phase shift proportional to an intermodal interference between at least two propagation modes, and —a detector of a physical quantity dependent on the phase shift.

公开(公告)号：US20240068892A1

公开(公告)日：2024-02-29

申请号：US18272269

申请日：2021-12-14

Applicant: University of Newcastle upon Tyne

Inventor： Richard David Whalley ,  Nima Ebrahimzade

IPC: G01L1/24

CPC classification number: G01L1/242

Abstract: A two-dimensional wall shear stress sensor comprising fixed and floating substrates, an incident light source and first and second photodetectors. The fixed substrate supports a first plurality of optical gratings. The floating substrate supports a second plurality of optical gratings superimposed over the first plurality of optical gratings to form a plurality of Moire fringe patterns comprising at least a first Moire fringe pattern extending in a first direction and a second Moire fringe pattern extending in a second direction different to the first direction. The floating substrate is displaceable relative to the fixed substrate in response to a wall shear stress imparted on the sensor, wherein displacement of the floating substrate correlates with a phase shift in at least one of the first and second Moire fringe patterns. An incident light source is configured to illuminate each of the plurality of Moire fringe patterns. The first photodetector system is configured to detect intensity of light reflected from the first Moire fringe pattern. The second photodetector system is configured to

公开(公告)号：US20240019323A1

公开(公告)日：2024-01-18

申请号：US18034899

申请日：2021-10-18

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  THE UNIVERSITY OF TOKYO

Inventor： Takashi MATSUI ,  Kazuhide NAKAJIMA ,  Nobutomo HANZAWA ,  Ryota WADA ,  Hideaki MURAYAMA

IPC: G01L1/24

CPC classification number: G01L1/242

Abstract: An object of the present disclosure is to enable behavior of a linear structure in water to be estimated. The present disclosure is an apparatus that: expresses at least one parameter in a plurality of discrete values, and forecasts behavior of a linear structure by using each of the discrete values; acquires behavior of the linear structure detected using an optical fiber; calculates a likelihood between the forecasted behavior of the linear structure and the acquired behavior of the linear structure; updates at least one of the plurality of discrete values on the basis of the likelihood; and calculates behavior of the linear structure by using the updated plurality of discrete values.

公开(公告)号：US20230375375A1

公开(公告)日：2023-11-23

申请号：US18319466

申请日：2023-05-17

Applicant: NEC Laboratories America, Inc.

Inventor： Yangmin DING ,  Yue TIAN ,  Sarper OZHARAR ,  Ting WANG

IPC: G01D5/353 ,  G06T7/70 ,  G06T7/13 ,  G01H9/00 ,  G01L1/24

CPC classification number: G01D5/35358 ,  G06T7/70 ,  G06T7/13 ,  G01H9/004 ,  G01L1/242 ,  G06T2207/10024

Abstract: A radio-controlled, two-way acoustic modem for operating with a distributed fiber optic sensing (DFOS) system including circuitry that receives radio signals including configuration information, configures the modem to operate according to the configuration information, and generate acoustic signals that are detected by the DFOS system. The acoustic modem includes one or more sensors that detect environmental information that is encoded in the acoustic signals for further reception by the DFOS system. The received configuration information may change the operating times, sensors or other operating aspects of the modem as desired an such information may be transmitted from a fixed location or a mobile vehicle.

公开(公告)号：US11804316B2

公开(公告)日：2023-10-31

申请号：US17841416

申请日：2022-06-15

Applicant: Nanjing University

Inventor： Yixin Zhang ,  Fei Xiong ,  Xuping Zhang ,  Chi Zhang ,  Long Chen ,  Shun Wang ,  Xiaohong Chen ,  Feng Wang

IPC: G01K11/32 ,  G02B6/44 ,  H01B11/22 ,  G01L1/24

CPC classification number: H01B11/22 ,  G01K11/32 ,  G01L1/242 ,  G02B6/4427

Abstract: The invention discloses an underwater umbilical cable which is capable of temperature and vibration measuring and three-dimensional shape reconstruction, wherein underwater umbilical cable is used to connect underwater equipment and aquatic equipment; the underwater umbilical cable comprises an outer sheath, armored steel wires, an inner sheath, a power cable, a communication optical cable, a steel pipe, three strain measuring optical fibers, three temperature measuring optical fibers, a distributed optical fiber strain interrogator, a distributed optical fiber temperature interrogator and a processor. The invention can collect the operation status data of the umbilical cable for a long time. The collected data is highly objective, can truly reflect the real-time operation status of the umbilical cables, and plays an important role in guaranteeing the long-term submarine oil and gas exploitation.