Photoelectric Patents (Class 73/705)
  • Patent number: 12029533
    Abstract: A blood pressure analysis system/method allowing conversion from an analog sensor input to a standardized analog output interface is disclosed. In some preferred embodiments the system/method permits a fiber optic pressure sensor to be interfaced to a standard patient care monitor (PCM) system using standardized Wheatstone Bridge analog interface inputs. Within this context the Wheatstone Bridge sensed output is defined by stimulus from the PCM and modulation of bridge element values by the conditioned output of an analog pressure sensor. The use of analog-to-digital-to-analog conversion in this blood pressure analysis permits retrofitting of PCM devices having analog Wheatstone Bridge inputs with advanced patient monitoring sensors without the need for specialized modifications to the baseline PCM data collection framework.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: July 9, 2024
    Assignee: Endophys Holdings, LLC
    Inventors: Phillip Douglas Purdy, Ronald Bruce Jennings
  • Patent number: 12013298
    Abstract: The present invention relates to cover for a pressure sensor. The cover is configured for being arranged to cover a sensor element.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: June 18, 2024
    Assignee: GRUNDFOS HOLDING A/S
    Inventors: Kjeld V. Jacobsen, Casper Pedersen, Per Ellemose Andersen
  • Patent number: 11965773
    Abstract: A torsion balance is provided which includes a twisting wire and a reflector. The twisting wire is a suspended carbon nanotube. The reflector is hung on the twisting wire. The reflector further includes a film, a first reflecting layer, and a second reflecting layer; and the film includes a first surface and a second surface opposite to the first surface, and the first reflecting layer is located on the first surface and the second reflecting layer is located on the second surface.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: April 23, 2024
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Lin Cong, Zi Yuan, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 11946732
    Abstract: A method of wrapping optical fiber around a fluid conduit. The optical fiber is wrapped at least partially around the conduit. The optical fiber is secured relative to the conduit at one or more securing locations, thereby defining a sequence of multiple optical fiber portions. Each optical fiber portion comprises a portion of the optical fiber. Each securing location delimits a given optical fiber portion from the subsequent optical fiber portion in the sequence of optical fiber portions. A direction of wrapping of each consecutive optical fiber portion in the sequence of optical fiber portions may be alternated between a clockwise direction and a counter-clockwise direction.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: April 2, 2024
    Assignee: HIFI ENGINEERING INC.
    Inventors: Arne Dankers, Seyed Ehsan Jalilian
  • Patent number: 11920997
    Abstract: A pressure measurement system includes a pressure pod with two chambers separated by a diaphragm such that a deformation/movement of the diaphragm is indicative of a difference between the pressures of the two chambers. Such deformation/movement is detected by a device that has no physical contact with the diaphragm, for example, by an optical detector that detects a change in the shape of the diaphragm or a movement of a protrusion on the diaphragm.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: March 5, 2024
    Assignee: NxStage Medical, Inc.
    Inventors: Mark T. Wyeth, James M. Brugger, Adam G. McDermott
  • Patent number: 11915609
    Abstract: Provided is a hollow organ model unit. The hollow organ model unit includes a base that includes a recessed part, a hollow organ model that is placed in the recessed part, a filler that is filled in the recessed part, and a sensor that performs a measurement on the hollow organ model.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: February 27, 2024
    Assignee: TOHOKU UNIVERSITY
    Inventors: Yoichi Haga, Makoto Ohta, Yasutomo Shimizu, Tadao Matsunaga, Noriko Tsuruoka, Soyoka Osaki, Hiroshi Yoshida, Simon Andre Tupin, Kaihong Yu
  • Patent number: 11898919
    Abstract: A temperature correcting pressure gauge which has a diaphragm having at least one surface coupled to a source of pressure to be measured, the diaphragm first surface having a first FBG from a first optical fiber attached in an appropriately sensitive region of the diaphragm, a FBG from a second optical fiber attached to the opposite surface from the first FBG, the first and second FBGs reflecting or transmitting optical energy of decreasing or increasing wavelength, respectively, in response to an applied pressure. The first and second FBGs have nominal operating wavelength ranges that are adjacent to each other but are exclusive ranges and the FBGs also have closely matched pressure coefficients and temperature coefficients.
    Type: Grant
    Filed: November 4, 2021
    Date of Patent: February 13, 2024
    Assignee: Intelligent Fiber Optic Systems Corporation
    Inventors: Vahid Sotoudeh, Behzad Moslehi, Joshua Kuehn, Richard J. Black
  • Patent number: 11884112
    Abstract: A tire failure prediction system includes first and second temperature sensors to detect temperatures of first and second tires mounted on a traveling vehicle, a temperature acquisition unit to acquire the temperatures detected by the first and second temperature sensors, and a determination unit to determine, based on the temperatures acquired, a possibility of failure for the first and second tires. The vehicle includes axles on which the tires are mounted. The first and second tires are mounted on an identical axle of the vehicle. Mounting positions of the first and second tires are symmetrical on the identical axle. The determination unit determines that the first tire has a possibility of failure where the temperature of the first tire is greater than a predetermined threshold, and a difference between the temperatures of the first and second tires is greater than a predetermined first temperature threshold.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: January 30, 2024
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Hiroshi Iizuka
  • Patent number: 11889264
    Abstract: A fiber optic MEMS microphone featuring an electrically deflectable MEMS membrane via a conversion of an optical energy propagating in an optical fiber cable to an electrical energy with a photodiode chip. The fiber optic MEMS microphone includes a MEMS device, the photodiode chip, a voltage, a power adjustable laser beam and a light.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: January 30, 2024
    Assignee: ORTA DOGU TEKNIK UNIVERSITESI
    Inventors: Baris Bayram, Asaf Behzat Sahin, Ilker Oguz, Goktug Cihan Ozmen, Ekin Muharrem Karaca, Do{hacek over (g)}a Buse Cavdir
  • Patent number: 11886010
    Abstract: Fiber optic terminals and fiber optic networks having variable ratio couplers are disclosed. The fiber optic terminals comprise a shell having a portion of a variable ratio coupler disposed therein. The variable ratio coupler comprises an optical input, a first optical output, a second optical output and a control. The control may be adjusted for changing an output power level between the first optical output and the second optical output.
    Type: Grant
    Filed: October 6, 2020
    Date of Patent: January 30, 2024
    Assignee: Corning Research & Development Corporation
    Inventor: Douglas Llewellyn Butler
  • Patent number: 11867855
    Abstract: Methods, systems, devices, and products for acoustic detection in a borehole.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: January 9, 2024
    Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
    Inventors: Sebastian Jung, Thomas Kruspe, Gunnar Tackmann, Dominik Hoheisel, Lennert Rabe, Jonathan Leong
  • Patent number: 11850073
    Abstract: Pressure sensing guidewires and methods for making and using pressure sensing guidewires are disclosed. An example pressure sensing guidewire may include a tubular member having a proximal region and a housing region. An optical pressure sensor may be disposed within the housing region. The optical pressure sensor may include a sensor body and a deflectable membrane coupled to the sensor body. The deflectable membrane may include a polymer. An optical fiber may be coupled to the sensor body and may extend proximally therefrom. A pressure equalization channel is formed in the optical fiber, the sensor body, or both.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: December 26, 2023
    Assignee: BOSTON SCIENTIFIC SCIMED, INC.
    Inventors: Cory P. Wright, Nathaniel Stark, Wenguang Li, Gaylin Mildred Yee, Neil Pollock, Mikhail E. Bashtanov, Fahad Hussain, Mette Funding La Cour
  • Patent number: 11846553
    Abstract: A temperature correcting pressure gauge which has a diaphragm having at least one surface coupled to a source of pressure to be measured, the diaphragm first surface having a first FBG from a first optical fiber attached in an appropriately sensitive region of the diaphragm, a FBG from a second optical fiber attached to the opposite surface from the first FBG, the first and second FBGs reflecting or transmitting optical energy of decreasing or increasing wavelength, respectively, in response to an applied pressure. The first and second FBGs have nominal operating wavelength ranges that are adjacent to each other but are exclusive ranges and the FBGs also have closely matched pressure coefficients and temperature coefficients.
    Type: Grant
    Filed: November 11, 2021
    Date of Patent: December 19, 2023
    Assignee: Intelligent Fiber Optic Systems Corporation
    Inventors: Vahid Sotoudeh, Behzad Moslehi, Joshua Kuehn, Richard J. Black
  • Patent number: 11811099
    Abstract: The disclosed principles provide techniques for 3D fabrication of sensing systems embedded inside battery cells and provide cell parameter data for a comprehensive and robust battery management system. The disclosed principles provide online and real-time monitoring battery state-of-health down to the individual cell level of each battery using embedded sensors on one or more of the internal layers of a cell, such as the dielectric separators found in such battery cells. The implementation of the disclosed principles in individual battery cells therefore provides an increased likelihood to mitigate catastrophic failures in batteries. In addition, the disclosed fabrication processes for printing sensors directly on one or more of the components or layers within each individual battery cell significantly reduce manufacturing steps required by conventional battery management systems.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: November 7, 2023
    Inventor: Aleksandra Fortier
  • Patent number: 11794426
    Abstract: A tire repair device with an inflation compressor and a sealant material canister, and method of operation. A pressure gauge determines a tire inflation pressure, and a controller identities a completion of a sealant injection upon a pressure drop measured at the pressure gauge. The controller is configured to automatically shut off the inflation compressor when a tire pressure meets a predetermined inflation value after the pressure drop.
    Type: Grant
    Filed: June 7, 2022
    Date of Patent: October 24, 2023
    Assignee: Illinois Tool Works Inc.
    Inventors: Carey Christopher Costle, Stephen Edward Richey
  • Patent number: 11759107
    Abstract: A microfluidic strain sensing device for monitoring intraocular pressure. The device has a contact lens and a closed microfluidic network embedded with the contact lens. The network has a volume that is sensitive to an applied strain. The network distinguishes: (i) a gas reservoir containing a gas, (ii) a liquid reservoir containing a liquid that changes volume when the strain is applied, and (iii) a sensing channel able to hold the liquid within the sensing channel. The sensing channel connects the gas reservoir on one end and connects the liquid reservoir on another end. The sensing channel establishes a liquid-gas equilibrium pressure interface and equilibrium within the sensing channel, which would fluidically change as a response to radius of curvature variations on a cornea, or as a response to mechanical stretching and release of the cornea. The liquid-gas equilibrium pressure interface and equilibrium are used for measuring the intraocular pressure.
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: September 19, 2023
    Assignee: Smartlens, Inc.
    Inventors: Ismail Emre Araci, Sevda Agaoglu, Murat Baday, Priscilla Diep
  • Patent number: 11733463
    Abstract: A fiber-optic system for use in optical sensing includes a multicore sensing fiber having at least two cores of which each of the at least two cores has a first core diameter, and a multicore lead-in fiber having at least two cores including a position corresponding with the position of the at least two cores of the multicore sensing fiber. Each of the at least two cores of the multicore lead-in fiber have a second core diameter. The second core diameter is substantially larger than the first core diameter. The system further includes an alignment means for aligning the multicore sensing fiber and the multicore lead-in fiber so that the lead-in fiber and the multicore sensing fiber are configured for coupling radiation between the fibers through the cores.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: August 22, 2023
    Assignees: FBGS TECHNOLOGIES GMBH, FBGS INTERNATIONAL NV
    Inventors: Christian Voigtlander, Johan Vlekken, Bram Van Hoe, Jan Van Roosbroeck, Eric Lindner
  • Patent number: 11723538
    Abstract: Optical pressure sensor assemblies that can be used with existing catheters and imaging systems. Pressure sensors may be compatible with atherectomy and occlusion-crossing catheters, where intravascular pressure measurements at various vessel locations are needed to determine treatment efficacy. The pressure sensors may employ an optical pressure measurement mechanism using optical interferometry, and may be integrated with existing imaging modalities such as OCT. The pressure sensor assemblies may include a movable membrane that deflects in response to intravascular pressure; an optical fiber that transmits light to the movable membrane and receives light reflected or scattered back from the movable membrane into the fiber; and a processor or controller configured to determine the distance traveled by the light received in the fiber from the movable membrane, where the distance traveled is proportional to the intravascular pressure exerted against the membrane.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: August 15, 2023
    Assignee: AVINGER, INC.
    Inventors: Peter H. Smith, Manish Kankaria
  • Patent number: 11698325
    Abstract: A method for measuring and computing unsteady loads using unsteady pressure-sensitive paint (uPSP) data includes performing an in-situ calibration using an average of pixels of a portion of an image captured of a surface painted with pressure-sensitive paint. The method also includes dividing an average static pressure by an intensity for each region of interest (ROI) in terms of time to produce a ratioed intensity measuring an intensity fluctuation. The method further includes producing a pressure-time history from the in-situ calibration and the measured intensity fluctuation. The method also includes calculating a fluctuating force by multiplying the produced pressure-time history by an area of pixels in each ROI, and converting a time signal to a frequency, and producing a power spectral density (PSD) to compare frequency content to determine an amount of energy at a certain frequency band.
    Type: Grant
    Filed: June 28, 2020
    Date of Patent: July 11, 2023
    Assignee: United States of America as Represented by the Administrator of NASA
    Inventor: Nettie Halcomb Roozeboom
  • Patent number: 11685279
    Abstract: A method for monitoring a liquid-cooled charging cable of a charging station for a traction battery of an electrically operated motor vehicle. Undershooting of a minimum permissible bending radius of the charging cable is detected, and the undershooting of the minimum permissible bending radius is indicated to a user or charge point operator or service employee.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: June 27, 2023
    Inventor: Christian Metzger
  • Patent number: 11682282
    Abstract: A system for detecting a fire or overheating event includes a heat detector, an optical fiber, a photodetector, and a processing unit. The pneumatic heat detector includes a sealed chamber sealed with a diaphragm having an initial position, and the optical fiber is in operable communication with the diaphragm. The optical fiber includes a Fiber Bragg Grating (FBG). The optical signal generator is configured to emit an optical signal with into the optical fiber. The photodetector is configured to receive a reflected optical signal from the FBG. The processing unit is configured to correlate the reflection wavelength of the reflected optical signal with a temperature of the heat detector.
    Type: Grant
    Filed: November 3, 2020
    Date of Patent: June 20, 2023
    Assignee: KIDDE TECHNOLOGIES, INC.
    Inventors: Elbert Jeyapaul, Thambiraj Avudaiappan, Scott Kenneth Newlin
  • Patent number: 11650098
    Abstract: A device for measuring a light radiation pressure is provided which includes a torsion balance, a laser, a convex lens, and a line array detector. The laser is configured to emit a first laser beam. The convex lens is located on an optical path of the first laser beam and configured to focus the first laser beam to a surface of the reflector. The line array detector is configured to detect a reflected first laser beam reflected by the reflector. The disclosure also provides a method for measuring the light radiation pressure using the device.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: May 16, 2023
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Lin Cong, Zi Yuan, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 11468918
    Abstract: A data storage drive includes a rotatable data storage medium, and a head communicatively couplable to the data storage medium. The head includes a temperature sensor and a heater. The data storage drive also includes a ramp for supporting the head when the head is moved away from the data storage medium, and a controller. The controller is configured to obtain first temperature sensor measurement values for different head heater power settings when the head is positioned on the ramp, and is configured to determine an internal pressure of the data storage drive as a function of the first temperature sensor measurement values.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: October 11, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Huazhou Lou, YiMin Niu, Eric John McCalla, Dipeshkumar J. Purani
  • Patent number: 11397301
    Abstract: In some embodiments, apparatuses and methods are provided herein useful for sensing pressure. In some embodiments, miniature housings are manufactured at ends of optical fibers. In some embodiments, a diamond diaphragm is provided on a hollow housing that receives a fiber optic cable and is sealed to form a Fabry-Perot cavity. In some forms, a plurality of sensors may be manufactured in batch.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: July 26, 2022
    Assignee: HOWARD UNIVERSITY
    Inventor: Hyung D. Bae
  • Patent number: 11199462
    Abstract: A temperature correcting pressure gauge which has a diaphragm having at least one surface coupled to a source of pressure to be measured, the diaphragm first surface having a first FBG from a first optical fiber attached in an appropriately sensitive region of the diaphragm, a FBG from a second optical fiber attached to the opposite surface from the first FBG, the first and second FBGs reflecting or transmitting optical energy of decreasing or increasing wavelength, respectively, in response to an applied pressure. The first and second FBGs have nominal operating wavelength ranges that are adjacent to each other but are exclusive ranges and the FBGs also have closely matched pressure coefficients and temperature coefficients.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: December 14, 2021
    Assignee: Intelligent Fiber Optic Systems, Inc.
    Inventors: Vahid Sotoudeh, Behzad Moslehi, Joshua Kuehn, Richard J. Black
  • Patent number: 11199660
    Abstract: Embodiments involve optical waveguides with spongy material for cladding or layers that include compressible gas pockets. The refractive index of the porous cladding material will change when compressed, bent, or stretched. Measurements for pressure, strain, bending, etc., may be obtained by monitoring the signal degradation and/or escape of radiant energy, e.g., IR, etc., from the core and out through the spongy cladding, where it may be picked up by a neighboring core. Optical waveguides configured as fibers may be easily sewn to stretchable materials, such as athletic tape, fabrics used in umbrellas, balloons, fabrics used in clothing, etc., to meet a robust number of applications.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: December 14, 2021
    Assignee: University of Louisville Research Foundation, Inc.
    Inventor: Cindy K. Harnett
  • Patent number: 11123458
    Abstract: Embodiments relate to the design and use of a low profile ablation catheter with a liquid core for use in laser ablation removal of arterial plaque blockages to restore blood flow.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: September 21, 2021
    Assignee: RA MEDICAL SYSTEMS, INC.
    Inventors: James B. Laudenslager, Dean S. Irwin, Cesar Diaz
  • Patent number: 10835182
    Abstract: A medical device system may include a guidewire including a distal pressure sensor and a proximal end. A connector cable may be coupled to the proximal end of the guidewire and may have a proximal end. A signal conditioning unit may be coupled to the proximal end of the connector cable. One or more of the guidewire, the connector cable, and the signal conditioning unit may include an optical fiber having a core with a tapered outer diameter.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: November 17, 2020
    Assignee: BOSTON SCIENTIFIC SCIMED, INC.
    Inventor: Roger W. McGowan
  • Patent number: 10782199
    Abstract: The present document relates to a pressure sensor comprising a structural element, the structural element comprising a first and second structural part. The sensor further comprises a first cavity being in fluid connection with an exterior of the sensor for establishing a first pressure which is dependent on an external pressure in the first cavity and a second cavity configured to be at a second pressure in use. A deformable structure is deformable dependent on a pressure difference between the first pressure and the second pressure. The sensor comprises a fiber including an intrinsic fiber optic sensor fixed to the structural element and to the deformable structure for providing an optical sensor signal dependent on said pressure difference.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: September 22, 2020
    Assignee: OPTICS11 B.V.
    Inventors: Devrez Mehmet Karabacak, Bastiaan Meulblok, German Enrique Knoppers
  • Patent number: 10526050
    Abstract: A shallow water anchor and related methods are provided. The shallow water anchor includes a four-bar linkage and a hydraulic actuator for actuating the four-bar linkage. An anchoring element is connected to the four-bar linkage. A hydraulic control arrangement operates the hydraulic actuator to transition the hydraulic actuator between stowed and deployed positions and vice versa. The shallow water anchor can incorporate a controller which monitors a current limit, a pressure limit, or both to perform a variety of anchoring functions.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: January 7, 2020
    Assignee: Johnson Outdoors Inc.
    Inventors: Craig Edwin Turek, Jason Robert Woodruff, Wesley Calvin Marcus, Ronald Phillip Hansen, David Gerald Liverseed, Justin Lane Alders, Janusz Stanislaw Komor
  • Patent number: 10520299
    Abstract: Disclosed are an apparatus for measuring a displacement using a fiber Bragg grating sensor, which is applied to a strain sensor using the fiber Bragg grating sensor, and a method of controlling sensitivity and durability of the same. The apparatus includes: a case forming an external appearance; third and fourth optical fibers having mutually different numbers of strands and installed in the case while being spaced apart from each other by a predetermined interval; and a connection unit installed between the third and fourth optical fibers and fixed at a predetermined position by tension applied to the third and fourth optical fibers, wherein the fiber Bragg grating sensor is installed to one selected from the pair of optical fibers having mutually different numbers of strands, so that measurement sensitivity and durability are controllable.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: December 31, 2019
    Assignee: FBG KOREA INC.
    Inventor: Geum Suk Lee
  • Patent number: 10508938
    Abstract: Fiber optical Fabry-Perot flow test device with local bending diversion structure, having an inlet flange, a test tube and an outlet flange, with both a fiber optical Fabry-Perot pressure sensor at high-pressure-side and a fiber optical Fabry-Perot pressure sensor at low-pressure-side, which are fixedly connected to the test tube through an auxiliary connecting device.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: December 17, 2019
    Assignee: Tianjin University
    Inventors: Tiegen Liu, Junfeng Jiang, Huijia Yang, Kun Liu, Shuang Wang, Weihang Zhang
  • Patent number: 10429499
    Abstract: The present invention provides a sensor system for measuring a parameter (e.g. volume, temperature or pressure) of a target, the system comprising a diaphragm, a sensor for measuring the axial spacing between the sensor and the diaphragm, and an axially adjustable mount. The mount has a first axial end for mounting the diaphragm which is axially movable relative to the sensor and an opposing, second axial end which is axially fixed relative to the sensor. The diaphragm and mount define a chamber for receiving the target or for being received within the target. In use, the axial spacing between the first axial end and the second axial end of the mount and thus the axial spacing between the diaphragm and sensor varies as a result of a change in the parameter differential across the diaphragm.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: October 1, 2019
    Assignee: ROLLS-ROYCE PLC
    Inventors: Francis Bridge, Martin A Smith, Bob E Wilson
  • Patent number: 10345515
    Abstract: The purpose of the present invention is to provide a bonded structure, a method for manufacturing the same, and a bonding state detection method which are capable of determining whether or not members are bonded together appropriately. A bonded structure 10 includes a laminated sheet 12A, a laminated sheet 12B, an adhesive 14 that bonds the laminated sheet 12A and the laminated sheet 12B together, and a distributed optical fiber 16 sandwiched between the laminated sheet 12A and the laminated sheet 12B. The cross-sectional shape of the distributed optical fiber 16 is deformed in accordance with the bonding state.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: July 9, 2019
    Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., THE UNIVERSITY OF TOKYO
    Inventors: Nozomi Saito, Takayuki Shimizu, Toshio Abe, Shu Minakuchi, Nobuo Takeda, Yutaka Terada
  • Patent number: 9778125
    Abstract: An optical pressure sensor is disclosed having a pressure sensing optical cavity. A temperature sensing optical cavity at the sensing head is used by an interrogator to correct a pressure signal for effects of temperature. The optical cavities may be, for example, Fabry Perot cavities in the sensor head.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: October 3, 2017
    Assignee: Oxsensis Limited
    Inventors: Ralf-Dieter Pechstedt, Fabrice F. M. Maillaud
  • Patent number: 9759824
    Abstract: The application describes methods and apparatus for seismic monitoring using fiber optic distributed acoustic sensing (DAS). The method involves interrogating a first optical fiber (102) deployed in an area of interest to provide a distributed acoustic sensor comprising a plurality of longitudinal sensing portions of fiber and also monitoring at least one geophone (107) deployed in the area of interest. The signal from the at least one geophone is analyzed to detect an event of interest (105). If an event of interest is detected the data from the distributed acoustic sensor acquired during said event of interest is recorded. The geophone may be co-located with part of the sensing fiber and in some embodiments may be integrated (307) with the sensing fiber.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: September 12, 2017
    Assignee: Optasense Holdings Limited
    Inventors: Paul Gerard Edmond Lumens, Samantha Grandi
  • Patent number: 9638591
    Abstract: An electronic device includes an input surface area for receiving a force applied by a user and one or more optical waveguides that include Bragg gratings. The optical waveguide or waveguides is operatively affixed to the input surface area. At least one light source is optically coupled to the optical waveguide or waveguides. At least one wavelength interrogator is coupled to the optical waveguide or waveguides.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: May 2, 2017
    Assignee: Apple Inc.
    Inventor: Sam R. Sarcia
  • Patent number: 9588001
    Abstract: A pressure detecting apparatus made by 3D printing technologies being able to be used in dangerous areas is provided. It mainly comprises a light source, a processor, a coupler, and at least one pressure transducer. The pressure transducer comprises a main body and a fiber grating. The fiber grating comprises a fiber Bragg grating sensor, and the fiber grating is fixed on the main body and covers the fiber Bragg grating sensor. When the main body is placed in a fluid area, the fluid would flow through the opening to deform the strain layer and generate a strain variation on the fiber Bragg grating sensor to cause a signal variation in the reflection frequency spectrum. The coupler is configured to couple to the light source and the pressure transducer to decode the signal variation into pressure parameters.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: March 7, 2017
    Assignee: NATIONAL KAOHSIUNG UNIVERSITY OF APPLIED SCIENCES
    Inventors: Chia-Chin Chiang, Tso- Sheng Hsieh
  • Patent number: 9550023
    Abstract: A removable material is deposited or otherwise applied to a flat substrate surface in a pattern corresponding to desired corrugations in a membrane, e.g., a deflection diaphragm. The applied material serves as a scaffold for a polymeric material, which is applied thereover, and following cure or hardening, the polymeric material is removed to form a finished corrugated membrane.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: January 24, 2017
    Assignee: MiniPumps, LLC
    Inventors: Changlin Pang, Jason Shih, Fukang Jiang, Changgeng Liu, Sean Caffey, Andrew Urazaki
  • Patent number: 9480793
    Abstract: Some embodiments of an infusion pump system may include an occlusion sensor that can be used to detect when an occlusion exists in the fluid path between the medicine reservoir and the infusion site on the user's skin. Such an occlusion may occur, for example, when the fluid flow line (e.g., a cannula, infusion set tubing, or the like) is kinked. If the medicine dispensation path to the user is occluded, the user may receive no dosage or a lower dosage of the medicine. As such, the occlusion sensor can be used to indicate when the fluid is flowing or not flowing, thereby permitting the infusion pump system to communicate an alarm to the user if an occlusion exists.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: November 1, 2016
    Assignee: Bigfoot Biomedical, Inc.
    Inventors: Amit Mhatre, Jian Yao Wu, Mitchell Wenger, Steven M. Friedman
  • Patent number: 9448105
    Abstract: An optical sensor is disclosed for measuring pressure and/or temperature. The optical sensor is adapted for use in high temperature environments, such as gas turbines and other engines. The optical sensor comprises an optical assembly having a sensor element, a spacer and a lens arranged along the optical axis. The sensor element is spaced from the lens by the spacer. An optical fiber is coupled to the optical assembly for illuminating the sensor element. The optical assembly is resiliently mounted in a housing such that the optical assembly is insulated from shock to the housing. There is also disclosed a method of assembling the optical sensor.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: September 20, 2016
    Assignee: Oxsensis Ltd.
    Inventors: Arnold Peter Roscoe Harpin, Stephen James Fasham, Stephen Geoffrey Tyler
  • Patent number: 9074957
    Abstract: The present invention relates to a high stable fiber fabry-perot pressure sensor with glue-free packing and its fabrication method. The sensor includes a sensor head, a sensor body with a through-hole in the axial direction and a optical fiber. The sensor head is a 4-layer structure, which includes the first silicon wafer, the first Pyrex glass wafer, the second silicon wafer and the second Pyrex glass wafer. The rear surface of the first silicon wafer forms the first reflecting surface of the fabry-perot (F-P) cavity, and the second silicon wafer provides the second reflecting surface for the F-P cavity. The second Pyrex glass wafer is welded together with the sensor body. The optical fiber is fixed in the sensor body by a CO2 laser welding to achieve the glue-free packing. When the external pressure is applied to deform the first layer silicon wafer, the F-P cavity length will change.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: July 7, 2015
    Assignee: Tianjin University
    Inventors: Junfeng Jiang, Tiegen Liu, Jinde Yin, Kun Liu, Yu Liu
  • Patent number: 9027218
    Abstract: An apparatus and method for finding part position relations of parts of mechanical and opto-mechanical machining and quality control systems, and for recognizing these parts, is disclosed. The present invention relies on optical contactless sensing technology, with recording of optical fiducial patterns and therefrom determining positions close to the work positions without physical contact. Part positions of machines are determined by associating or mechanically integrating fiducial patterns (1) with key parts, and optically detecting the images of these patterns. Part positions and displacements according to given part position finder (6) strategies are found, by associating fiducial pattern images (14) and machine position data (17) to parts that are members of a part geometry relation (15), and under part displacement constraints (16), finding given part positions or displacements (18).
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: May 12, 2015
    Inventor: Gudmunn Slettemoen
  • Patent number: 8973445
    Abstract: A holographic pressure sensing apparatus includes a first optical fiber with a diffractive element at its end face, and a light-coupling component for receiving from the first optical fiber end face first and second images respectively formed by interaction with the diffractive element of a first light of a first wavelength and a second light of a second wavelength. Displacement of the light-coupling component, toward or away from the first optical fiber end face, will adjust an overlap of the first and second images, such that a change in a measurement of said overlap will indicate a change of the pressure in the fluid surrounding the casing.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: March 10, 2015
    Assignee: Qorex LLC
    Inventors: Trevor Wayne MacDougall, Paul Eric Sanders
  • Patent number: 8966988
    Abstract: Ultra-miniature surface-mountable optical pressure sensor is constructed on an optical fiber. The sensor design utilizes an angled fiber tip which steers the optical axis of the optic fiber by 90°. The optical cavity is formed on the sidewall of the optic fiber. The optical cavity may be covered with a polymer-metal composite diaphragm to operate as a pressure transducer, Alternatively, a polymer-filled cavity may be constructed which does not need a reflective diaphragm. The sensor exhibits a sufficient linearity over the broad pressure range with a high sensitivity. The sensitivity of the sensor may he tuned by controlling the thickness of the diaphragm. Methods of batch production of uniform device-to-device optical pressure sensors of co-axial and cross-axial configurations are presented.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: March 3, 2015
    Assignee: University of Maryland
    Inventors: Miao Yu, Hyungdae Bae, Xuming Zhang
  • Publication number: 20150020599
    Abstract: An optical pressure sensor is disclosed having a pressure sensing optical cavity. A temperature sensing optical cavity at the sensor head is used by an interrogator to correct a pressure signal for effects of temperature. The optical cavities may be, for example, Fabry Perot cavities in the sensor head.
    Type: Application
    Filed: March 13, 2013
    Publication date: January 22, 2015
    Inventors: Ralf-Dieter Pechstedt, Fabrice F.M. Maillaud
  • Publication number: 20150020598
    Abstract: Various embodiments include apparatus and methods to measure pressure using an optical fiber. The optical fiber can be structured with fiber Bragg gratings arranged along the optical fiber. Optical signals can be transmitted through the optical fiber, where the optical signals have a wavelength of a slow-light peak of a respective one of the fiber Bragg gratings. Signals resulting from the optical signals transmitted through the optical fiber can be detected and a value of pressure from the detected signals can be determined.
    Type: Application
    Filed: July 18, 2013
    Publication date: January 22, 2015
    Inventor: Yunmiao Wang
  • Publication number: 20140360484
    Abstract: A valve apparatus includes substantially co-aligned first and second valve seats and substantially co-aligned first and second valve members. The first valve member is moveable relative to the first valve seat between at least an open position in which the first valve member is spaced from the first valve seat and a closed position in which the first valve member is seated against the first valve seat. The second valve member is moveable relative to the second valve seat between at least an open position in which the second valve member is spaced from the second valve seat and a closed position in which the second valve member is seated against the second valve seat. An armature is operable for moving the first and second valve members, in response to a magnetic field generated by a coil.
    Type: Application
    Filed: August 25, 2014
    Publication date: December 11, 2014
    Inventors: Mark H. Stark, Mike C. Santinanavat, Ryan D. Jensen, John F. Broker
  • Publication number: 20140360276
    Abstract: A pressure sensing system includes a pressure sensor, an optical fiber in operable communication with the pressure sensor, and a body having a diaphragm integrally formed therein and separated a distance from the optical fiber.
    Type: Application
    Filed: June 7, 2013
    Publication date: December 11, 2014
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Carl W. Stoesz, Sydnee Marie Hammond
  • Patent number: 8850895
    Abstract: The disclosed invention describes an unpowered apparatus which can wirelessly sense pressure based on microfluidics for point-of-care glaucoma diagnosis. Moreover, the disclosed invention teaches methods to construct the invention using microfabrication processing. Finally, a detailed and illustrative schematic of the wireless readout system is disclosed.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 7, 2014
    Inventor: John Yan