公开(公告)号：US12209923B1

公开(公告)日：2025-01-28

申请号：US17493047

申请日：2021-10-04

Applicant: iSenseCloud, Inc.

Inventor： Huy D. Nguyen ,  An-Dien Nguyen ,  Sepand Momeni

IPC: G01L1/24 ,  G01K11/3206 ,  H01L21/66

Abstract: Apparatuses and methods therefor generally relate to sensing. In one example of such an apparatus, there is a platform. An optical fiber with Fiber Bragg Grating sensors is located in a trench formed in the platform. The trench has curved sections. The Fiber Bragg Grating sensors are respectively in the curved sections of the trench.

公开(公告)号：US12196631B2

公开(公告)日：2025-01-14

申请号：US17255472

申请日：2019-06-21

Applicant: VICTORIA LINK LIMITED

Inventor： Rodney Alan Badcock ,  Maximillian Fisser

IPC: G01L1/24 ,  G01B11/16 ,  G01K1/16 ,  G01K11/3206 ,  H01F6/02

Abstract: An optical fibre sensing system (300) with an incident light source (309), a wavelength spectrum interrogator (313), and an optical fibre (302) with a substantially continuous fibre Bragg grating (306). An upstream portion (318) of the optical fibre has an attenuation length to light to the interrogator (313) at a first equilibrium wavelength. A downstream portion (322) of the optical fibre reflects light to the interrogator (313) when a change in temperature and/or strain at the downstream portion (322) causes a portion of the fibre Bragg grating to reflect light to the interrogator (313) at a second wavelength and at a second intensity. A processor (315) is configured to analyse the reflected spectrum (314) to determine when a portion of the fibre Bragg grating (306) is experiencing a change in temperature and/or strain based on deviation in the reflected spectrum (314) from an initial peak corresponding to the initial wavelength.

公开(公告)号：US20250012651A1

公开(公告)日：2025-01-09

申请号：US18712313

申请日：2022-10-12

Applicant: SONY GROUP CORPORATION

Inventor： TOMOKO KATSUHARA ,  HIROYUKI SHIGEI ,  TETSUYA NARITA ,  TEPPEI TAKAHASHI

IPC: G01L5/22 ,  B25J19/02 ,  G01L1/24

Abstract: A tactile sensor unit according to one embodiment of the present disclosure includes a pin-hole layer, an optical sensor, a plurality of light sources, a deformation layer, and a marker. The pin-hole layer has a plurality of pin-holes and a plurality of first through holes. The optical sensor is disposed at a position opposed to the plurality of pin-holes via a predetermined gap. The plurality of light sources is disposed in a layer between the pin-hole layer and the optical sensor, at locations respectively opposed to the plurality of through holes. The deformation layer is disposed at a position on a side opposite to the plurality of light sources in a positional relationship with respect to the pin-hole layer. The marker is disposed on a surface of the deformation layer or inside of the deformation layer.

公开(公告)号：US20250012647A1

公开(公告)日：2025-01-09

申请号：US18289877

申请日：2022-05-06

Applicant: THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE

Inventor： Wounjhang PARK

IPC: G01L1/24

Abstract: A nanosensor for detecting a force includes a metal layer, a flexible-material layer, and a photoluminescent material. The flexible-material layer is deposited on a top surface of the metal layer. The photoluminescent material is attached to, or at least partially embedded in the flexible-material layer and configured to emit first photoluminescence when optically excited at an excitation wavelength. The first photoluminescence has a first wavelength different from the excitation wavelength. The first intensity of the first photoluminescence changes with a distance between the photoluminescent material and the metal layer, where the distance changes in response to the force acting on the flexible-material layer.

公开(公告)号：US12188967B2

公开(公告)日：2025-01-07

申请号：US17788158

申请日：2020-12-22

Applicant: University of Strathclyde

Inventor： Pawel Niewczas ,  Grzegorz Fusiek

IPC: G01R15/24 ,  G01L1/24 ,  G01R1/36 ,  G01R31/08 ,  H02H9/04

Abstract: The invention enables an optical voltage sensor, comprising a piezoelectric actuator mechanically coupled to an optical strain sensor (such as a fibre Bragg grating), to withstand lightning impulses, the effects of which would otherwise be harmful or destructive to the piezoelectric actuator and/or other sensitive components. As such, the optical voltage sensor, comprised within a photonic voltage transducer which also comprises a lightning impulse attenuator, is able to comply with relevant standards and be used for applications in power networks and exposed to the highest voltages for equipment.

公开(公告)号：US12135254B2

公开(公告)日：2024-11-05

申请号：US17665186

申请日：2022-02-04

Applicant: Massachusetts Institute of Technology

Inventor： Edward Adelson ,  Sandra Liu

IPC: G01L1/24 ,  G01L5/00

Abstract: A retrographic sensor includes a flexible transparent structure, a transparent elastomeric pad, and an at least partially reflective layer. The flexible transparent structure may be configured to elastically deform between multiple configurations. At least one light source emits light into the transparent structure. The flexible transparent structure may include one or more markers that are illuminated by the at least one light source. The retrographic sensor may also include a photosensitive detector configured to image the flexible transparent structure and one or more markers. A processor may determine a configuration of the flexible transparent structure based at least in part on an image from the one or more markers.

公开(公告)号：US20240337550A1

公开(公告)日：2024-10-10

申请号：US18292074

申请日：2022-07-26

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

Inventor： Laurent MAURIN

IPC: G01L11/02 ,  G01L1/24

CPC classification number: G01L11/025 ,  G01L1/246

Abstract: A method for measuring a variation in an internal pressure and/or a variation in a temperature of a pipe including a portion includes calculating the variation in the internal pressure and/or the variation in the temperature of the pipe based on at least one deformation variation, each deformation variation being obtained only from measured monitoring variables among which first and second ones are associated with first and second measurement directions, respectively. The first and second measurement directions define first and second angles with a plane normal to the longitudinal axis having different absolute values modulo π.

公开(公告)号：US12104972B2

公开(公告)日：2024-10-01

申请号：US17935958

申请日：2022-09-28

Applicant: The Government of the United States of America, as represented by the Secretary of the Navy

Inventor： Brandon F. Redding ,  Clay Kingsley Kirkendall

IPC: G01L1/24

CPC classification number: G01L1/246

Abstract: Multiplexed fiber optic sensors are able to monitor a multitude of sensor positions along an optical fiber from a single interrogation point. A long-standing goal is to increase the length of fiber and the number of multiplexed sensors without significantly compromising performance or increasing the size, weight, power and cost of the fiber and interrogation system. A technique is provided for performing extremely long-range, multiplexed fiber optic strain sensing in an efficient manner. This technique utilizes a serial optical frequency comb based interrogation system to probe an array of sensors placed along a single optical fiber.

公开(公告)号：US12104971B2

公开(公告)日：2024-10-01

申请号：US17497338

申请日：2021-10-08

Applicant: LUMICKS CA HOLDING B.V.

Inventor： Graeme Alan King ,  Andreas Sebastian Biebricher ,  Iddo Heller ,  Erwin Johannes Gerard Peterman ,  Gijs Jan Lodewijk Wuite

IPC: G01L1/24 ,  G01N15/14 ,  G02B21/00 ,  G02B21/06

CPC classification number: G01L1/24 ,  G01N15/1425 ,  G02B21/0004 ,  G02B21/06

Abstract: One aspect of this disclosure relates to a computer-implemented method for determining a force acting on at least part of a structure, for example a biological structure, such as a DNA molecule. The method comprises controlling a light-sensitive system, e.g. of a microscope, to determine light information based on light from the structure. The light is incident on at least a part of the light sensitive system. The light-sensitive system may be said to capture the light from the structure. The at least part of the structure comprises one or more optically active entities, such as DNA intercalator molecules and donor/acceptor fluorophores. At least one of (i) an optical activity of the entities and (ii) a quantity of the entities depends on the force acting on the at least part of the structure. Furthermore, the light information defines a light property value associated with said at least part of the structure. The method further comprises determining the force acting on the at least part of the structure on the basis of said light property value and a reference light property value.

公开(公告)号：US20240280423A1

公开(公告)日：2024-08-22

申请号：US18570786

申请日：2022-05-11

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Noboru UEDA ,  Youji NAKAI ,  Katsuhito OSHIMA ,  Yoshiyuki MATSUBARA ,  Motonobu NISHINO ,  Masashi OIKAWA ,  Shinji NAKAUE ,  Naoki SOGABE ,  Michio IMAI ,  Toru YAMAMOTO ,  Shinichi YAMANOBE ,  Kazumasa OKUBO

IPC: G01L1/24

CPC classification number: G01L1/242

Abstract: An optical fiber-embedded PC steel strand includes a PC steel strand in which a plurality of PC steel wires are twisted together, and an optical fiber. The optical fiber is fixed with a resin in a twist groove that is a groove between two PC steel wires of the PC steel wires, the two PC steel wires being disposed at an outer surface of the PC steel strand and being next to each other. A coefficient of variation in distance between a common tangent of the two PC steel wires that form the twist groove and are next to each other, and a center of the optical fiber is 0.5 or less, as measured in 10 cross sections of the PC steel strand that are perpendicular to a longitudinal direction of the PC steel strand.