Condition Responsive Light Guide (e.g., Light Guide Is Physically Affected By Parameter Sensed Which Results In Light Conveyed To The Photocell) Patents (Class 250/227.14)
  • Patent number: 11385110
    Abstract: A monitoring system for an electric vehicle that draws current from a conductor by means of a current collector that contacts a conductor in operation of the electric vehicle. The monitoring system includes a plurality of sensor modules throughout the current collector, wherein each sensor module comprises a plurality of FBG (Fibre Bragg Grating) sensors. Sensors of each module are arranged in a geometric pattern that compensates for temperature induced wavelength changes in the FBG sensors of each module. An optical source illuminates each sensor module and an optical coupler optically couples the optical source to each sensor module. An optical signal interpretation module receives optical signals from each sensor module wherein the optical signals are generated by the sensor modules in response to illumination of the sensor modules, wherein the interpretation module is configured to determine from the optical signals, a temperature-independent strain measurement for each sensor module.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: July 12, 2022
    Assignee: CITY, UNIVERSITY OF LONDON
    Inventors: Tong Sun, Kenneth Grattan, Ye Chen, Miodrag Vidakovic, Matthias Fabian, Fei Xiong
  • Patent number: 11375960
    Abstract: A measuring system (1) comprises a sensor (6) arranged to be attached to a subject for obtaining a measured value representing a physical or a physiological quantity of the subject. The measuring system further comprises means for deriving a subject-related value from the measured value. The sensor is arranged to be attached at one of a plurality of positions on the subject. The measuring system further comprises means for establishing the position of the sensor on the subject. The means for deriving the subject-related value is arranged for deriving the subject-related value also in dependence on the position of the sensor on the subject.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: July 5, 2022
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Annelies Goris, Maarten Peter Bodlaender
  • Patent number: 11378552
    Abstract: A microscale photoacoustic sensor uses the detection of ultrasound waves generated by a sample in response to incident light absorption to perform photoacoustic spectroscopy, imaging, and microscopy. The microscale photoacoustic sensor, including components to excite a sample and detect ultrasound waves, may be integrated onto a single chip. The microscale photoacoustic sensor may excite a sample using a metasurface collimator. The metasurface collimator includes an array of diffraction grooves to collimate an excitation beam uniformly out of the plane of the sensor to create a wide and homogeneous beam spot. The microscale photoacoustic sensor may detect ultrasound waves using an optical photoacoustic transducer. The optical photoacoustic transducer includes a resonator on a mechanical membrane to detect ultrasound waves with high sensitivity. The microscale photoacoustic sensor may be used in applications such as deep-tissue neural imaging or microfluidic biological screening.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: July 5, 2022
    Assignee: Massachusetts Institute of Technology
    Inventors: Robin Singh, Anuradha M. Agarwal, Brian Anthony
  • Patent number: 11353367
    Abstract: A temperature sensor for measuring temperature is described. The sensor comprises a fibre optic cable (104) comprising optical fibre (102) and an interrogator unit (106) configured to interrogate the optical fibre with electromagnetic radiation, detect any radiation that is Rayleigh backscattered within the optical fibre and determine a measurement signal indicative of temperature changes for at least one longitudinal sensing portion of the optical fibre. A controllable thermal element, which may be a heating element, such as an electrically conducting element (108), is arranged along the length of the fibre optic cable (104) and in thermal communication with the fibre optic cable (104). A controller (110) is configured to generate a thermal variation in the controllable thermal element, e.g. by generating a time varying electric current in the electrically conducting element (108).
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: June 7, 2022
    Inventor: Alastair Godfrey
  • Patent number: 11331688
    Abstract: A device for a lacquer transfer includes a transfer roller mounted at and rotatable relative to a frame. The roller includes a cylindrical support-body, first ring-element, second ring-element, and a tire including a middle-section forming a circumferential outer contact surface with depressions, the roller configured to roll with the outer contract surface on a work surface of a workpiece for transferring lacquer from the outer contact surface and the depressions to the work surface. The tire includes two annular end-sections attached to a cylindrical outer shell of the support-body resulting in two axially separated and circumferentially extending connections, the tire, connections, and outer shell of the support-body being fluid-tight. The first and second ring-elements are in the first cavity seated on the support-body at a distance in an axial direction of the roller from one another and the middle-section of the tire between the first and second ring-elements is prestrained in the axial direction.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: May 17, 2022
    Assignees: Airbus Operations GmbH, Airbus (S.A.S.)
    Inventors: Pierre C. Zahlen, Alexander Gillessen, Christian Schepp, Daniel Kress, Waldemar Kümmel
  • Patent number: 11326936
    Abstract: A distributed acoustic system (DAS) may comprise an interrogator and an umbilical line attached at one end to the interrogator, a downhole fiber attached to the umbilical line at the end opposite the interrogator. The interrogator may further include a proximal circulator, a distal circulator connected to the proximal circulator by a first fiber optic cable, and a second fiber optic cable connecting the proximal circulator and the distal circulator.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: May 10, 2022
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Andreas Ellmauthaler, Glenn Andrew Wilson, John L. Maida
  • Patent number: 11313744
    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.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: April 26, 2022
    Assignee: Hifi Engineering Inc.
    Inventors: John Hull, Seyed Ehsan Jalilian
  • Patent number: 11300524
    Abstract: A metrology measurement apparatus may include one or more illumination sources, a beamsplitter configured to receive illumination from the one or more illumination sources from an illumination pathway and direct the illumination along a measurement pathway, and an objective lens. The objective lens may direct the illumination from the measurement pathway to a sample, collect light from the sample, and direct the collected light along the measurement pathway to the beamsplitter such that the beamsplitter may direct the collected light along a collection pathway to a detector. The apparatus may further include a pupil-plane scanner along the measurement pathway with a pupil relay and a deflector in a relayed pupil plane such that adjusting the deflector adjusts a position of the illumination spot on the sample without modifying a position of the illumination pupil distribution or a position of a distribution of the collected light along the collection pathway.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: April 12, 2022
    Assignee: KLA Corporation
    Inventors: Andrew V. Hill, Amnon Manassen, Avi Abramov, Asaf Granot, Andrei V. Shchegrov
  • Patent number: 11282307
    Abstract: A flight restriction setting system includes a damage detector and a flight restriction calculator. The damage detector is configured to detect damage caused to a structure constituting an aircraft. The flight restriction calculator is configured to set flight restriction on the aircraft according to a degree of the damage detected by the damage detector.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: March 22, 2022
    Assignee: SUBARU CORPORATION
    Inventors: Kensuke Yoshimura, Masakatsu Abe
  • Patent number: 11280642
    Abstract: A reflection mode sensor system may include an optical fiber core and an optical fiber cladding. A first long period grating (LPG) may be positioned along the optical fiber core having a first grating period, a second LPG may be positioned along the optical fiber core having a second grating period, and a third LPG may be positioned along the optical fiber core having a third grating period. The grating periods may enable sensing of multiple parameters simultaneously. A metal coating may be applied to an end facet of the combined optical fiber core and optical fiber cladding. The metal coating may also cover a side surface of the optical fiber cladding along a length from the end facet. The metal coating may include a paste applied to the optical fiber core and the optical fiber cladding, where the paste has been cured, and includes a metal.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: March 22, 2022
    Assignee: Boise State University
    Inventors: Harish Subbaraman, Sohel Rana, Nirmala Kandadai
  • Patent number: 11283244
    Abstract: A topological laser system is described. The laser system comprises an array of optical elements arranged in an array and coupled between them such that the array is configured for supporting one or more topological modes. The plurality of optical elements comprises optical elements carrying gain material configured for emitting optical radiation in response to pumping energy. The laser system further comprises a pumping unit configured to provide pumping of a group of the optical elements of the array within at least a portion of the spatial region corresponding with said topological mode; and at least one output port optically coupled to one or more of the optical elements associated with said topological mode. The at least one output ports is configured for extracting a portion of light intensity from said laser system.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: March 22, 2022
    Assignees: TECHNION RESEARCH AND DEVELOPMENT FOUNDATION, LTD., THE UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Mordechai Segev, Gal Harari, Demetrios N. Christodoulides, Miguel Angel Bandres Motola
  • Patent number: 11249248
    Abstract: There is described a method of fabricating an optical fiber device, the method comprising: positioning longitudinal portions of a plurality of optical fibers alongside each other in a given geometrical relationship, depositing liquid coating material around the longitudinal portions of the plurality of optical fibers; and the liquid coating material setting up around the longitudinal portions of the plurality of optical fibers thereby maintaining said given geometrical relationship along the longitudinal portions.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: February 15, 2022
    Assignee: POLYVALOR, LIMITED PARTNERSHIP
    Inventors: Raman Kashyap, Sébastien Loranger, Frédéric Monet, Samuel Kadoury, Pierre Lorre
  • Patent number: 11149520
    Abstract: A cementing tool with a top seal and a bottom seal may be positionable within a casing string of a wellbore. A fiber optic line may be coupled to the top seal and to a second fiber optic line coupled to a bottom seal that is deployed within an annulus. An amplifier coupled to the cementing tool may amplify a source optical signal from a light source and a sensing measurement signal from the second fiber optic line and the first fiber optic line. One or more operational parameters, such as cementing parameters, may be adjusted based, at least in part, on the sensing measurement signal.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: October 19, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: David Andrew Barfoot, Christopher Lee Stokley, John Laureto Maida, Jr.
  • Patent number: 11150083
    Abstract: System and method for determining real-time sag and shape information of an electrical power line based on strain distribution along a length of an optical fiber associated with the power line. An embedded fiber coupled to an overhead transmission line measures strain using the backscatter of an optical signal, the optical signal is then interrogated using an interferometer.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: October 19, 2021
    Assignee: The Curators of the University of Missouri
    Inventors: Jie Huang, Rui Bo
  • Patent number: 11150114
    Abstract: A multiplexed fiber optic sensor system including at least one light source, one or more first optical fibers having a first end arranged to receive light from the light source(s) and transmit the light to at least one fiber optic sensor, and one or more second optical fibers arranged to receive reflected light from the fiber optic sensors and transmit the reflected light to a light sensing element. Using the sensor system, it is possible to measure physical phenomena, such as electromagnetic phenomena, along multiple points along or within a material or structure of interest or on separate materials or structures. The fiber optic sensors can be electromagnetic phenomena sensors, pressure sensors, acceleration sensors, strain sensors, temperature sensors, or other sensors designed to measure physical phenomena. The sensor system can be used to measure phenomena of interest at several locations or take different kinds of measurements at the same or approximately the same location.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: October 19, 2021
    Assignee: SMARTSENSECOM, INC.
    Inventors: Nicholas Lagakos, Victor Kaybulkin, Patrick Hernandez, Christopher Vizas
  • Patent number: 11150148
    Abstract: An optical fiber detecting device includes: an optical fiber configured to extend in contact with a surface of an object to be measured; a metal covering configured to cover a part of the optical fiber in an extending direction of the optical fiber from an outside of the object to be measured; a fixing section configured to fix an inner surface of the metal covering and the optical fiber; and welding sections configured to fix the metal covering to the object to be measured at positions interposing the optical fiber in a direction intersecting the extending direction of the optical fiber.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: October 19, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hiroki Takeda, Yoshihide Wadayama, Ryo Kawabata
  • Patent number: 11131544
    Abstract: An optical fiber curvature sensor. Two networks (R1, R2) with periodic longitudinal modulation of the refractive index of the optical fiber core are inscribed in the fiber (F) one behind the other or one on top of the other. The networks are configured to respectively reflect wavelengths ?1 and ?2 such that ?1=?B+??B1 and ?2=?B+??B2, where ?B is the Bragg wavelength of the networks and where ?B1 and ?B2 are shifts sensitive to the temperature, to deformations and to the curvature of the optical fiber. The two networks are defined so that the quantities ??B1 and ??B2 have substantially identical sensitivity to temperature and to deformations and substantially opposite sensitivity to curvature.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: September 28, 2021
    Assignees: Université de Nantes, Centre National de la Recherche Scientifique
    Inventors: Romain Guyard, Yann Lecieux, Cyril Lupi, Dominique Leduc
  • Patent number: 11092499
    Abstract: An integrated measuring system comprises a structural element for building constructions, having an internal cavity, hermetically closed to contain a compressible fluid, and a measuring system for measuring stresses and/or deformations on the structural element, whereby it is possible to measure pressure and temperature of the compressible fluid so as to measure a change in the compressible fluid pressure and determine a variation of the volume of the internal cavity resulting from an action imparted to the structural element.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: August 17, 2021
    Inventor: Francesco Tondolo
  • Patent number: 11076930
    Abstract: The present disclosure provides a conductor-less, shape-able surgical lighting system for use in surgical applications in which a medical clinician, once having established a surgical site, can shape the lighting system to selectively illuminate desired volumes of the surgical site. The system includes one or more preselected lengths of an elongate light emitting member formed of a transparent elastomer matrix material having a glass transition temperature of lower than or substantially equal to room temperature to render the elongate light emitting member bendable and shape-able. Embedded in the transparent elastomer matrix material are particles of a transparent material having a refractive index different from a refractive index of the matrix material dispersed in the elastomer matrix material so that light coupled into the elongate light emitting member is scattered and refracted out of the elongate light emitting member along its length.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 3, 2021
    Assignee: SYNAPTIVE MEDICAL INC.
    Inventors: Siu Wai Jacky Mak, Michael Frank Gunter Wood
  • Patent number: 11079260
    Abstract: Systems, methods, and apparatuses for detecting components of a multiphasic flow are disclosed. A flowmeter may include a plurality of optical fibers disposed across a fluid flow. The optical fibers may generate backscattering of a portion of a laser beam transmitted along the optical fibers. The backscattering may be produced by a grating formed by zinc dicyanoaurate formed in each of the optical fibers. Heterodyne detection may be used to determine a Brillouin frequency shift that is used to determine strain and temperature measurements at different locations along the optical fibers. Artificial Intelligence uses the strain and temperature measurements to determine a flow regime of the fluid flow and flow rates of components forming the fluid flow.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: August 3, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Karam Chand, Frode Hveding
  • Patent number: 11076764
    Abstract: System and method that use a pressure sensitive mat to monitor vitals signs of an individual positioned on the pressure sensitive mat. The pressure sensor mat is coupled to pressure sensors that each have an adjustable pressure responsivity. In order to be able to monitor the vital signs without interruption due to the individual repositioning themself on the pressure sensitive mat and thereby running the risk of increasing the pressure on some pressure sensors to the point of saturation, or running the risk of decreasing the pressure on other pressure sensors to the point losing any usable signal, the system comprises circuitry that monitors a baseline pressure sensor at one pressure sensor and controls, as a function of the monitored signal, the pressure responsivity at a neighbor pressure sensor. This allows the neighbor sensor to generate a monitored signal with discernable time dependent features associated with the individual's vital signs.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: August 3, 2021
    Assignee: Press-IR Inc.
    Inventors: Rafik Alphonse Goubran, Frank-Dietrich Knoefel, Raymond Bruce Wallace
  • Patent number: 11073010
    Abstract: A downhole valve assembly comprises a sleeve concentric with a housing and movable relative to a port through the housing to control flow of fluid through the port. A sensor assembly provides indicates the relative positions of the sleeve and housing, and comprises first and second sensors on e.g. the housing which detect markers on e.g. the sleeve. The sensor outputs are produced by processing (e.g. combining, integrating, summing, subtracting or otherwise processing) the signal components of each of the first and second sensors to correct for misalignment of the sleeve with the housing. The sensor output provides position information for more than one plane, and the output signal therefore allows for correction of errors in the position information arising from misalignment of the sleeve with the housing.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: July 27, 2021
    Assignee: Weatherford Technology Holdings, LLC
    Inventor: Matthew David Knight
  • Patent number: 11054248
    Abstract: A method of determination of deformation along a first direction of an equipment (1) in contact with hot material and including an inner face (3) in contact with the hot material and an outer face (4) opposite to the inner face (3) is provided. An equipment (1) in contact with hot material provided with means to determine its deformation along a first direction is also provided.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: July 6, 2021
    Assignee: ArcelorMittal
    Inventors: Mounir Amourak, Thiago Rabelo Nunes Campos, Herve Pierret, Pierre-Jean Krauth, Dominique Sert, Joseph Iezzi, Michel Nogues
  • Patent number: 11054288
    Abstract: An optical fiber interrogator for interrogating optical fiber that includes fiber Bragg gratings (“FBGs”). The interrogator includes a light source operable to emit phase coherent light, amplitude modulation circuitry optically coupled to the light source and operable to generate pulses from the light, and control circuitry communicatively coupled to the amplitude modulation circuitry that is configured to perform a method for interrogating the optical fiber. The method includes generating a pair of light pulses by using the amplitude modulation circuitry to modulate light output by the light source without splitting the light.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: July 6, 2021
    Assignee: Hifi Engineering Inc.
    Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Tom Clement
  • Patent number: 11047230
    Abstract: A distributed acoustic system (DAS) with an interrogator, an umbilical line attached at one end to the interrogator, and a downhole fiber attached to the umbilical line at the end opposite the interrogator. A method for optimizing a sampling frequency may begin with identifying a length of a fiber optic cable connected to an interrogator, identifying one or more regions on the fiber optic cable in which a backscatter is received, and optimizing a sampling frequency of a distributed acoustic system (DAS) by identifying a minimum time interval that is between an emission of a light pulse such that at no point in time the backscatter arrives back at the interrogator that corresponds to more than one spatial location along a sensing portion of the fiber optic cable.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: June 29, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Andreas Ellmauthaler, John L. Maida, Jr., Ira Jeffrey Bush, Michel Joseph LeBlanc, Glenn Andrew Wilson
  • Patent number: 11029219
    Abstract: A temperature sensor and temperature sensing system for sensing changes in temperature up to a predetermined temperature is disclosed. The temperature sensor includes a microstructured optical fiber where the microstructured optical fiber includes a plurality of longitudinal channels extending along the microstructured optical fiber. The sensor also includes 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 microstructured optical fiber. The fiber Bragg grating is operable to produce band reflection at a reflection wavelength that varies in accordance with changes in temperature at the core region of the optical fiber.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: June 8, 2021
    Assignee: The University of Adelaide
    Inventors: Tanya Monro, Stephen Warren-Smith
  • Patent number: 11022431
    Abstract: A shape calculating apparatus includes a light source and a light guide provided with detection targets to decrease quantity of light guided by the light guide according to a bend shape of the light guide. The apparatus also includes a light detector to detect light quantity information in wavelengths included in light absorption spectra of the detection targets, a calculation unit that makes a calculation relating to a shape of each detection target based on the light quantity information, and a control unit that changes a dynamic range of at least one of an intensity of light input to the light guide and a detection signal output by the light detector for each wavelength range so that a magnitude of the detection signal is within a range between a lower limit threshold and an upper limit threshold of the light detector.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: June 1, 2021
    Assignee: OLYMPUS CORPORATION
    Inventors: Koichi Takayama, Hiromasa Fujita
  • Patent number: 11024457
    Abstract: The present invention relates to a static electric induction apparatus (1b) comprising a winding (2) including a plurality of winding units (3), at least one first spacer element (5) arranged between the winding units (3) and including a first groove (18) defined in the surface thereof, and a sensor system for monitoring the temperature in the apparatus, wherein the sensor system comprises an elongated and flexible temperature sensing element (16) disposed in the first groove. The first groove (18) has a curved part that receives the flexible temperature sensing element which is wound at least one revolution in the first groove (18). The first groove enters and exits the first spacer element in one and the same end of the first spacer element. The apparatus comprises an elongated second spacer element (14a) extending in an axial direction on the outside of the winding (2).
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: June 1, 2021
    Assignee: ABB POWER GRIDS SWITZERLAND AG
    Inventors: Manoj Pradhan, Tor Laneryd
  • Patent number: 11022505
    Abstract: A fiber-reinforced composite material having a sensor array of a plurality of sensors for structural health monitoring of the composite material, and also having electrical conducting paths incorporated in the composite material and extending through the composite material. The electrical conducting paths are arranged in a first group and in a second group different from the first group, with the first group extending in a first direction, and the second group extending in a second direction and intersecting the electrical conducting path of the first group. The intersecting paths form together with the conducting paths of first group a network of n row conductors and m column conductors. There is also a signal processing means for monitoring at least one electrical characteristic of the conducting paths.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: June 1, 2021
    Assignee: TECHNISCHE HOCHSCHULE KÖLN
    Inventors: Michael Bongards, Hartmut Köhn
  • Patent number: 11018761
    Abstract: Methods and systems for automated health assessment of fiber optic links of a fiber optic communication system are described. Tables are used to describe the fiber optic links, including access addresses to communication modules used in the links. Telemetry data representative of operation of the communication modules can be read via the access addresses into a central station. OTDR/OFDR measurement data of fiber optic segments used in the links can be read via the access addresses into the central station. The telemetry and/or OTDR/OFDR measurement data can be used by the central station for comparison against reference data to assess health of the links. The communication modules locally and continuously capture the telemetry data to detect transient events that may be the result of tampering of the links.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: May 25, 2021
    Assignee: Ultra Communications, Inc.
    Inventors: Joseph F. Ahadian, Vahid Nazer, Sandra Skendzic, Charles B. Kuznia, Richard J. Weiss
  • Patent number: 10983049
    Abstract: The invention relates to a method for detecting a local change in refractive index of a dielectric medium located on the surface of an optical sensor, said optical sensor comprising for this purpose a waveguide comprising a region, called the active region, covered with at least one metallic layer in contact with the dielectric medium, said method comprising the following steps: a) emitting a light beam at the input of the waveguide so that this light beam can be propagated, within the waveguide, according to at least N propagation modes, where N is a natural integer such that N?2; b) measuring the intensity of at least one zone of the spatial distribution of the intensity of the light beam reflected by said active region of the optical sensor; and c) detecting the local change in the refractive index of the dielectric medium by means of a database supplying the link between the intensity of said at least one zone of the spatial distribution of the intensity of the light beam reflected by the active region o
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: April 20, 2021
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Karim Vindas, Elodie Engel, Loic Leroy, Thierry Livache, Arnaud Buhot
  • Patent number: 10952810
    Abstract: A method and system for generating imaging data during a medical intervention are provided. An external optical sensor is attached on the patient's body, and includes at least one external orientation fiber core configured to measure an orientation of the external optical sensor relative to a point of reference. The external optical sensor is interrogated to generate external sensor orientation information during the medical intervention. That information is used to estimate an orientation of the external optical sensor, which is then displayed during the medical intervention.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: March 23, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Michael Grass, Raymond Chan, Robert Manzke
  • Patent number: 10948676
    Abstract: Devices, systems, and methods for flexible, deployable structures with optical fiber are provided in accordance with various embodiments. For example, some embodiments include a system that may include a flexible, deployable structure and one or more optical fibers coupled with the flexible, deployable structure. In some embodiments, one or more conditions of the one or more optical fibers coupled with a flexible, deployable structure may be determined. One or more conditions of the flexible, deployable structure may be determined utilizing the determined one or more conditions of the one or more optical fibers coupled with the flexible, deployable structure. The one or more conditions of the one or more optical fibers may be correlated to the one or more conditions of the flexible, deployable structure.
    Type: Grant
    Filed: March 24, 2019
    Date of Patent: March 16, 2021
    Assignee: Roccor, LLC
    Inventors: Kevin Cox, Dana Turse, Mark Lake
  • Patent number: 10948132
    Abstract: Assessing pipeline integrity includes deploying vibration sensors at optimal sensing locations in the pipeline network. The sensors communicate with an analyzer via an intermediary that is a local or a remote wireless controller. A sensor records and processes vibration signals regularly, according to protocols kept in the memory of the sensor. The sensor, via a controller, communicates recorded data or processed data to an analyzer and receives updated protocols or other instructions from an analyzer. The analyzer aggregates recorded and processed data from the sensors, which are then analyzed to detect or localize leak sounds from the pipeline network. The recorded data from two or more sensors may be time-aligned using synchronization methods.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: March 16, 2021
    Assignee: 64seconds, Inc.
    Inventors: Paul Lander, Craig Goldman
  • Patent number: 10927651
    Abstract: Apparatuses, systems and methods for producing hydrocarbon material from a subterranean formation using a displacement process are disclosed. In one aspect, there is provided a method of controlling hydrocarbon production of hydrocarbon material disposed within a subterranean formation by a displacement process via a plurality of flow communication stations of an injection well. Characteristics of a supplied production-initiating fluid are determined uphole of the flow communication stations for a plurality of states of the injection well, wherein in each of the states of the injection well a different subset of the flow communication stations are disposed in an opened condition and a different subset of the flow communication stations are disposed in a closed condition. Characteristics may be determined at the surface, for example, at the wellhead. A state of the injection well that optimizes one or more operating parameters is determined.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: February 23, 2021
    Assignee: NCS MULTISTAGE INC.
    Inventors: Marty Stromquist, John Edward Ravensbergen, Lyle Laun, Tim Johnson
  • Patent number: 10918291
    Abstract: Systems and methods are provided for extracting hemodynamic information, optionally employing portable electronic devices with optional User Interface (UI) features for system implementation. The systems and methods may be employed for acquiring hemodynamic signals and associated electrophysiological data and/or analyzing the former or both in combination to yield useful physiological indicia or results. Such hardware and software is advantageously used for non-invasively monitoring cardiac health.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: February 16, 2021
    Assignee: California Institute of Technology
    Inventors: Derek Rinderknecht, Niema Pahlevan, Peyman Tavallali, Morteza Gharib
  • Patent number: 10921120
    Abstract: Systems, methods, and other implementations described herein relate to a manner of detecting kinking or other bending on a bendable structure. In one implementation, a bendable structure is configured to kink at different locations. First and second sensors surface-mounted antiparallel along the bendable structure have bending responses that increase with increasing amounts of bending, and that are increasingly sensitive along their lengths. The bending responses from first and second sensors are received at a first time and a second time subsequent to the first time. The formation of a kink is identified in response to identifying that the bending responses are indicative of unkinked bending at the first time and indicative of kinked bending at the second time. In response to identifying the formation of the kink, the location of the kink is identified based on the bending responses at the first time.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: February 16, 2021
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Umesh N. Gandhi, Taewoo Nam, Yuyang Song, Ryohei Tsuruta
  • Patent number: 10914621
    Abstract: A method and system for monitoring fluid flow in an open channel system, using an optical fibre that extends along at least a portion of the open channel system within the channel below the surface of the fluid. The method comprising sending light pulses into the sensor optical fibre, receiving backscattered light from the sensor optical fibre, and analysing properties of the backscattered light to obtain data representing strain along the sensor fibre. The strain data can be processed to derive information about the fluid flow, such as fluid depth, flow velocity and flow volume. A containment system for the optical fibre sensor may be included to protect the fibre and convert the pressure of a fluid in the open channel to a strain in the fibre. The temperature of the fluid may also be measured and temperature compensation of the measured strain carried out.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: February 9, 2021
    Assignee: Nuron Limited
    Inventor: Michael Ainger
  • Patent number: 10914047
    Abstract: A system for detecting an intrusion of at least one of a monitoring fiber and a detector comprises a sensor having a closure monitor and an intrusion monitor, the closure monitor including a signal generator and at least one detector attached to the monitoring fiber. The signal generator transmits signal light such that the monitoring fiber receives the transmitted signal light and reflects a portion of the signal light via the at least one detector to the closure monitor and transmits a non-reflected portion of the signal light. The intrusion monitor receives the transmitted non-reflected portion of the signal light, and monitors the non-reflected portion of the signal light to detect transient changes in the non-reflected portion of the signal light indicative of at least one of a vibration, a motion and a handling of at least one of the monitoring fiber and the at least one detector.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: February 9, 2021
    Assignee: NETWORK INTEGRITY SYSTEMS, INC.
    Inventors: Cary R. Murphy, Mark K. Bridges, Joseph Giovannini
  • Patent number: 10907958
    Abstract: A system and method for detecting and determining the location of (i) defects in railroad track rails and (ii) the presence of cars, trains or vehicles on the rails. A strain sensitive fiber optic cable is continuously bonded to each section of rail, with the cables of adjacent rails being interconnected by non-strain-sensitive fiber optic cable. A detection system provides an optical backscatter sensing function and an optical time domain reflectometry analysis and distance determining function to determine the nature and location of rail anomalies and vehicle presence on the rails.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: February 2, 2021
    Inventor: Frank J Smith
  • Patent number: 10907055
    Abstract: An approach for curing ultraviolet sensitive polymer materials (e.g., polymer inks, coatings, and adhesives) using ultraviolet radiation is disclosed. The ultraviolet sensitive polymer materials curing can utilize ultraviolet light at different wavelength emissions arranged in a random, mixed or sequential arrangement. In one embodiment, an ultraviolet light C (UV-C) radiation emitter having a set of UV-C sources that emit UV-C radiation at a predetermined UV-C duration and intensity operate in conjunction with an ultraviolet light B (UV-B) radiation emitter having a set of UV-B sources configured to emit UV-B radiation at a predetermined UV-B duration and intensity and/or an ultraviolet light A (UV-A) radiation emitter having a set of UV-A sources configured to emit UV-A radiation at a predetermined UV-A duration and intensity, to cure the ultraviolet sensitive polymer materials.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: February 2, 2021
    Assignee: Sensor Electronic Technology, Inc.
    Inventors: Timothy James Bettles, Michael Shur, Alexander Dobrinsky, Maxim S. Shatalov
  • Patent number: 10898276
    Abstract: Provided are robotic systems and methods for navigation of luminal network that can improve strain-based shape sensing. In one aspect, the system can compare strain-based shape data to shape data determined based on robotic data (e.g., kinematic model data, torque measurements, mechanical model data, command data, etc.) and adjust the strain-based shape data as necessary. Any portion of the strain-based shape data can be adjusted, weighted differently, or discarded based on the comparison. For example, data from trustworthy sources may indicate that the shape of an instrument exhibits or should exhibit one or more characteristics. If the system determines that any portion of the strain-based shape data is not in agreement with such characteristics, the system may adjust the portion of the strain-based shape data such that the adjusted strain-based shape data is in agreement with the characteristics of the instrument.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: January 26, 2021
    Assignee: AURIS HEALTH, INC.
    Inventors: Chauncey F. Graetzel, David Paul Noonan
  • Patent number: 10901116
    Abstract: An interrogation system includes lasers and an optical filtering device. The lasers include a primary set of lasers coupled to a primary multiplexer for generating primary light signals and a secondary set of lasers coupled to a secondary multiplexer for generating secondary light signals. The primary set of lasers may generate light signals having a first set of overlapping wavelengths and the secondary set of lasers may generate light signals having a second set of overlapping wavelengths. The optical filtering device may route the primary light signal and the secondary light signal to an optical fiber sensing cable positioned in a wellbore and receive reflection signals corresponding to the primary light signal and the secondary light signal. The reflection signals corresponding to the secondary light signal may have a first wavelength range that matches a second wavelength range of the primary light signals.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: January 26, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Kwang II Suh
  • Patent number: 10883861
    Abstract: An optical fiber distributed acoustic sensor system includes weak broadband reflectors inserted periodically along the fiber. The reflectors reflect only a small proportion of the light from the DAS incident thereon back along the fiber, typically in the region of 0.001% to 0.1%, but preferably around 0.01% reflectivity per reflector. In addition, to allow for temperate compensation to ensure that the same reflectivity is obtained if the temperature changes, the reflection bandwidth is relatively broadband. In some embodiments the reflectors are formed from a series of fiber Bragg gratings, each with a different center reflecting frequency, the reflecting frequencies and bandwidths of the gratings being selected to provide the broadband reflection. A chirped grating may also be used to provide the same effect. In preferred embodiments, the reflectors are spaced at half the gauge length i.e. the desired spatial resolution of the optical fiber DAS.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: January 5, 2021
    Assignee: Silixa Ltd.
    Inventors: Mahmoud Farhadiroushan, Tom Parker, Sergey Shatalin
  • Patent number: 10871403
    Abstract: Disclosed is a sensor for detecting temperature of an aircraft. The sensor comprises a temperature sensor elongated with respect to an axis. The temperature sensor comprises a sheath elongated with respect to the axis. The temperature sensor comprises a central conductor disposed within the sheath and elongated with respect to the axis having a conductor material defining a conductor temperature coefficient having a conductor coefficient magnitude. The temperature sensor comprises an optical fiber disposed within the sheath. The temperature sensor comprises a thermistor disposed within the sheath and surrounding the central conductor, the thermistor having thermistor material defining a thermistor temperature coefficient defining a thermistor coefficient magnitude greater than the conductor coefficient magnitude.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: December 22, 2020
    Assignee: KIDDE TECHNOLOGIES, INC.
    Inventors: Terry Simpson, Stefan Coreth
  • Patent number: 10855375
    Abstract: Embodiments provide an optical transceiver assembly for resolving a problem that an optical assembly has a large size. The optical transceiver assembly may include a first cavity, a second cavity and WDMs. The first cavity may include at least two optical receivers, which may be configured to receive light of different wavelengths, respectively. The second cavity may include at least two optical transmitters, may be configured to emit light of different wavelengths, respectively. Each of the at least two optical receivers and each of the at least two optical transmitters may correspond to different WDMs, respectively. The WDM corresponding to one of the at least wo optical receivers can be configured to: separate, from light emitted from an optical fiber, light of a wavelength receivable by the corresponding optical receiver, transmit the light to the corresponding optical receiver, and reflect the other wavelengths.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: December 1, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zhiguang Xu, Yue Wen
  • Patent number: 10855070
    Abstract: A vehicle includes a generator, an outlet, and a controller. The generator is electrically connected to the outlet. The controller is programmed to, responsive to outlet temperature being less than a threshold, deliver an electric current from the generator to an external device that is connected to the outlet. The controller is further programmed to, responsive to the outlet temperature exceeding the threshold, inhibit delivering the current from the electric machine to the external device.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: December 1, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Sriram Jala, Muhammad Zubair Feroz
  • Patent number: 10854932
    Abstract: A system includes a first optical sensor sensitive to both a parameter of interest, Parameter1, and at least one confounding parameter, Parameter2 and a second optical sensor sensitive only to the confounding parameter. Measurement circuitry measures M1 in response to light scattered by the first optical sensor, where M1=value of Parameter1+K*value of Parameter2. The measurement circuitry also measures M2 in response to light scattered by the second optical sensor, where M2=value of Parameter2. Compensation circuitry determines a compensation factor, K, for the confounding parameter based on measurements of M1 and M2 taken over multiple load/unload cycles or over one or more thermal cycles. The compensation factor is used to determine the parameter of interest.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: December 1, 2020
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Anurag Ganguli, Julian Schwartz, Ajay Raghavan, Peter Kiesel, Bhaskar Saha, Saroj Sahu, Lars Wilko Sommer
  • Patent number: 10842359
    Abstract: Sensing parts are formed in different directions in a circumferential direction in substantially a same position in the longitudinal direction thereof. Each sensing part is configured to include an optical characteristic changing member which generates the optical signals having absorption wavelength characteristic regions that vary from sensing part to sensing part by giving an optical characteristic change, which differs from that of other sensing parts, to the sensor light incident thereon in accordance with an amount of bending in a specific direction. A light detector detects the optical signals included in sensor light from a light source, which has passed through the sensing parts and undergone the optical characteristic change.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: November 24, 2020
    Assignee: OLYMPUS CORPORATION
    Inventors: Hiromasa Fujita, Ken Sato
  • Patent number: 10837274
    Abstract: A sensor arrangement using an optical fiber and methodologies for performing an analysis of a subterranean formation, such as a subterranean formation containing a hydrocarbon based fluid. The sensor arrangement may be used to measure one or more physical parameters, such as temperature and/or pressure, at a multiplicity of locations in the subterranean reservoir. The sensor arrangement may comprise a sensor array comprising an elongated outer casing for insertion in the subterranean formation and into a fluid in the subterranean formation. The sensor array may comprise an optical fiber defining an optical path that links one or more temperature sensors and one or more pressure sensors and transports measurement data generated by the temperature and pressure sensors. A data processing system may be connected to the sensor array to receive measurements from the sensor array and to compute one or more values of a property of an extraction installation operating on the subterranean formation.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: November 17, 2020
    Assignee: WEATHERFORD CANADA LTD.
    Inventors: Andre R. Vincelette, Jason Scott Kiddy, John Niemczuk, Christopher S. Baldwin, Paul Lefebvre