Including Physical Deformation Or Movement Of Waveguide Patents (Class 385/13)
  • Patent number: 10603124
    Abstract: Autonomous closed loop control of a flexible tendon-driven continuum manipulator having a sensor at a distal tip is performed by measuring spatial attributes of a sensor at the distal tip and estimating an orientation of a base of an articulating region of the flexible tendon-driven continuum manipulator from a kinematic model and the spatial attributes of the sensor. The manipulator control in a task space uses the estimated orientation, a desired trajectory in the task space, and the position of the sensor at the distal tip. The sensor at the distal tip may be a magnetic sensor, impedance sensor, or optical sensor.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: March 31, 2020
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: David B. Camarillo, Jake A. Sganga
  • Patent number: 10596346
    Abstract: A fiber optic force sensing assembly for detecting forces imparted at a distal end of a catheter assembly. The structural member may include segments adjacent each other in a serial arrangement, with gaps located between adjacent segments that are bridged by flexures. Fiber optics are coupled to the structural member. In one embodiment, each fiber optic has a distal end disposed adjacent one of the gaps and oriented for emission of light onto and for collection of light reflected from a segment adjacent the gap. The optical fibers cooperate with the deformable structure to provide a change in the intensity of the reflected light, or alternatively to provide a variable gap interferometer for sensing deformation of the structural member. In another embodiment, the gaps are bridged by fiber Bragg gratings that reflect light back through the fiber optic at central wavelengths that vary with the strain imposed on the grating.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: March 24, 2020
    Assignee: St. Jude Medical International Holding S.à r.l.
    Inventors: Nicolas Aeby, Giovanni Leo
  • Patent number: 10571253
    Abstract: A shape estimation device includes an input circuit, a storage circuit and an arithmetic circuit. The input circuit receives light amount information being a relationship between a wavelength and a light amount. The light amount information is acquired by using a sensor configured such that the light amount to be detected with respect to the wavelength corresponding to each of sensing parts varies in accordance with a shape of each of the sensing parts. The storage circuit stores a relationship among the shape, the wavelength and the light amount with respect to each sensing part. The arithmetic circuit calculates the shape of each sensing part, based on the light amount information, and a light amount estimation value being a relationship between the wavelength and the light amount.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: February 25, 2020
    Assignee: OLYMPUS CORPORATION
    Inventors: Ken Sato, Hiromasa Fujita, Masanori Mitsui, Yusuke Yamamoto
  • Patent number: 10568519
    Abstract: The present disclosure relates to a terahertz imaging system for imaging a lumen of a human, such as an intravascular space. A system may include a catheter and a terahertz transceiver device coupled to the catheter. The terahertz transceiver device may be operative to output terahertz radiation through a lumen of a human and to receive reflection signals based on the terahertz radiation. A power source may be coupled to the terahertz transceiver device. The system may further include a controller in communication with the terahertz transceiver device. The controller is operative to obtain an image of the lumen based on the reflection signals.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: February 25, 2020
    Assignee: THE SPECTRANETICS CORPORATION
    Inventor: Matthew Spears
  • Patent number: 10561368
    Abstract: An ablation catheter system configured with a compact force sensor at a distal end for detection of contact forces exerted on an end effector. The force sensor includes fiber optics operatively coupled with reflecting members on a structural member. In one embodiment, the optical fibers and reflecting members cooperate with the deformable structure to provide a variable gap interferometer for sensing deformation of the structural member due to contact force. In another embodiment, a change in the intensity of the reflected light is detected to measure the deformation. The measured deformations are then used to compute a contact force vector. In some embodiments, the force sensor is configured to passively compensate for temperature changes that otherwise lead to erroneous force indications. In other embodiments, the system actively compensates for errant force indications caused by temperature changes by measuring certain local temperatures of the structural member.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: February 18, 2020
    Assignee: St. Jude Medical International Holding S.à r.l.
    Inventors: Giovanni Leo, Nicolas Aeby, Stuart J. Olstad, Axel Bertholds, Pere Llosas
  • Patent number: 10555790
    Abstract: Methods of manufacturing a flexible force sensor include forming a first sensor part providing a plurality of spaced first electrode plates in an electrically non-conductive material. A second sensor part is also formed and includes a plurality of second electrode plates in an electrically non-conductive material. The second electrode plates are identical to the first electrode plates at least in terms of spacing. The first part is assembled to the second part such that each of the first electrode plates are aligned with and parallel to, yet spaced from, respective ones of the second electrode plates, establishing a plurality of capacitive sensing components. The first electrode plates are movable relative to the corresponding second electrode plates, establishing a variable gap therebetween. The sensor parts can be ring-shaped. The sensor parts can be formed via MEMS techniques, with the non-conductive material being a polymer.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: February 11, 2020
    Assignee: St. Jude Medical, Cardiology Division, Inc.
    Inventors: Saurav Paul, Troy T. Tegg, John P. Gerhart, Tianhong Cui, Miao Lu
  • Patent number: 10494905
    Abstract: An exemplary method of controlling an artificial lift system may include monitoring, via a downhole phase change sensor, for an indication of steam breakthrough, determining the occurrence of a steam breakthrough event based on the indication of steam breakthrough, and adjusting one or more parameters of the artificial lift system based on the determination. One example system for controlling an artificial lift system may include a downhole phase change sensor configured to monitor for an indication of steam breakthrough and a processing system configured to determine the occurrence of a steam breakthrough event based on the indication of steam breakthrough and adjust one or more parameters of the artificial lift system based on the determination.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: December 3, 2019
    Assignee: OILFIELD DEVELOPMENT CENTER LIMITED
    Inventors: Darren Part, Phil Fouillard, Daniel Ugricic
  • Patent number: 10498447
    Abstract: This disclosure describes circuit boards configured for optical data transmission using fibers of the reinforcing material of the circuit board substrate as optical fibers. The disclosure is directed to circuit boards that include a plurality of fibers and a dielectric matrix material. Each fiber of the plurality of fibers includes a core material substantially transparent to a wavelength range of interest and a cladding material. The refractive index of the cladding material is less than a refractive index of the core material. The plurality of fibers are interwoven in a weave. The weave is at least partially encapsulated by the dielectric matrix material. The weave provides structural support for the circuit board and a plurality of optical paths for optical signals.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: December 3, 2019
    Assignee: Rolls-Royce Corporation
    Inventor: Robert Richard Somaduroff
  • Patent number: 10488296
    Abstract: A method of determining stress variations over time in an undersea pipe for transporting fluids, the method comprising: installing along the entire length of the pipe (1) at least one distributed optical fiber sensor (2-1 to 2-4) using Rayleigh backscattering, the sensor being dedicated to measuring at least one degree of freedom of movement variation over time in the pipe at each cross section of the pipe; continuously measuring movement variation of the optical fiber sensor over time; and determining stress variations over time at each point in the pipe by time integration of the measured movement variation of the optical fiber sensor.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: November 26, 2019
    Assignee: Saipem S.A.
    Inventor: Axel Sundermann
  • Patent number: 10473539
    Abstract: A force sensor for measuring force and/or pressures disclosed. In some embodiments, the sensor includes first and second layers, each layer having one or more electrodes arranged in a repeating, undulating pattern. Such an undulating pattern may include a serpentine pattern or a repeating v-shaped pattern. When arranged, the one or more electrodes on the first layer are placed in facing relationship and cross the one or more electrodes on the second layer to form a plurality of electrode intersections. When stretched, the one or more electrodes on the first layer move relative to the one or more electrodes on the second layer while creating new electrode intersections.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: November 12, 2019
    Assignee: Tekscan, Inc.
    Inventor: Robert M. Podoloff
  • Patent number: 10466412
    Abstract: A multi-mode optical fiber includes a glass center for conducting fundamental and high order modes of light waves, the high order modes including a first desired group of high order modes and a second undesired group of high order modes. A cladding surrounds the glass center, the glass center and cladding forming a core. A trench within the cladding surrounds the glass center reflecting the first and second groups of high order modes into the core. An acrylic layer surrounds the core. A buffer coating of polymer surrounds the acrylic layer and the core. The buffer coating is a pressure extruded polymer, where the buffer coating retains at least some of the pressure from the pressure extrusion and applies continuous pressure to the acrylic layer and the core therein, along the length of the fiber, such that the at least the first group of desired high order modes are permitted to be transmitted through the core and where the second group of undesired high order modes are suppressed.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: November 5, 2019
    Assignee: NEXANS
    Inventors: Paul Michael Good, Rakesh Sambaraju
  • Patent number: 10436656
    Abstract: An impact sensor for a vehicle. The impact sensor includes at least one strain-sensitive sensor element which comprises a sensor material, and at least two terminals, between which the sensor material is electrically connected. The sensor material is a metal-containing carbon material.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: October 8, 2019
    Assignee: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
    Inventors: Thomas Pelt, Christian Bour
  • Patent number: 10408995
    Abstract: Method for creating an optical sensing fiber having a reflective structure integrally disposed therein, comprising: providing an optical fiber having a core and a cladding layer disposed in optical contact with the core, and having a polymer coating layer disposed in contact with and surrounding the cladding layer, the coating layer at least partially transparent in the wavelengths of 390-600 nm; providing a source of electromagnetic radiation having a wavelength in the range of 390-600 nm; and delivering a selected wavelength of the electromagnetic radiation through the coating layer to a selected location within the fiber core or cladding such that the delivered electromagnetic radiation alters the core or cladding to create at least one reflective structure in the core or cladding at the selected location.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: September 10, 2019
    Assignee: SENTEK INSTRUMENT, LLC
    Inventors: Bo Dong, Anbo Wang
  • Patent number: 10281498
    Abstract: A fiber optic sensor for measuring voltage in direct current and alternating current systems is disclosed. The sensor may include an optical fiber probe containing transmitting and receiving fibers, fixed conductor elements, and a dynamic conductor element with a reflective surface or material. The reflector may be attached to a dynamic conductor. The two fixed conductors may be placed parallel to one another and coupled to a static voltage source. The dynamic conductor may bisect the fixed conductors and be coupled to a voltage source. The dynamic conductor may be spaced apart from the ends of the fibers in the fiber probe, and positioned so that light transmitted through the transmitting fiber is reflected by that surface into a receiving fiber. A light sensing means may be coupled to the receiving fiber, so light from a light reflected by the reflector body back into the receiving fibers is detected.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: May 7, 2019
    Inventors: Patrick Hernandez, Victor Kaybulkin, Nicholas Lagakos, Christopher Vizas
  • Patent number: 10220956
    Abstract: An apparatus for determining the position of an object having one or more magnetic elements. The apparatus includes magnetostrictive optical sensors, each arranged to produce a signal which is indicative of a proximity of the sensor to the one or more magnetic elements. The apparatus is arranged to determine the position of the object based on a plurality of such proximity signals.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: March 5, 2019
    Assignees: AIRBUS OPERATIONS LIMITED, AIRBUS OPERATIONS GMBH
    Inventors: Christopher Wood, Alan Sharp, Carsten Heuer
  • Patent number: 10191154
    Abstract: In some implementations, scene depth is extracted from dual frequency of a cross-correlation signal. A camera may illuminate a scene with amplitude-modulated light, sweeping the modulation frequency. For each modulation frequency in the sweep, each camera pixel may measure a cross-correlation of incident light and of a reference electrical signal. Each pixel may output a vector of cross-correlation measurements acquired by the pixel during a sweep. A computer may perform an FFT on this vector, identify a dual frequency at the second largest peak in the resulting power spectrum, and calculate scene depth as equal to a fraction, where the numerator is the speed of light times this dual frequency and the denominator is four times pi. In some cases, the two signals being cross-correlated have the same phase as each other during each cross-correlation measurement.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: January 29, 2019
    Assignee: Massachusetts Institute of Technology
    Inventors: Achuta Kadambi, James Schiel, Ayush Bhandari, Ramesh Raskar, Vage Taamazyan
  • Patent number: 10132995
    Abstract: A sensing system that includes an optical fiber disposed helically around an outer surface of a structure along a longitudinal axis of the structure is provided. The optical fiber is disposed such that at least one complete helical turn of the optical fiber covers the length of the structure. Further, the sensing system also includes a fiber Bragg grating (FBG) set comprising a plurality of FBGs in the optical fiber. Each FBG in the set is configured to generate reflected light that is indicative of strain values at a location of each respective FBG on the optical fiber. Furthermore, the system also includes a processing system coupled to the optical fiber. The processing system is configured to determine location coordinates of each FBG and values of one or more of bending moment, tensile force, and torsional moment acting at each FBG location on the optical fiber.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: November 20, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Mahadevan Balasubramaniam
  • Patent number: 9965078
    Abstract: A pressure-sensing touch system for recognition of a touch event caused by a pressure applied at a touch position is disclosed which includes a light guide plate, a light output plate, a light source subsystem, a plurality of interference plates, a plurality of detectors and a controller. Upon application of the pressure at the touch position, a change in an intensity distribution of output light exiting from two through-openings of the interference plate occurs. The plurality of detectors are configured to detect the change. The controller is configured to recognize the touch event based on the detecting by the plurality of detectors. Also disclosed are a pressure-sensing touch method and a display system.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: May 8, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Zhiqiang Xu, Xiangxiang Zou, Xuefei Wang
  • Patent number: 9921098
    Abstract: An optical unit includes an optical element serving as a light guide path, which includes an incident entrance, an emitter, a light coupler which is arranged in the case where a plurality of incident entrances are arranged, and which couples a primary light, and a light separator which is arranged in the case where a plurality of emitters are arranged, and which separates the primary light to each of the emitters. The optical unit further includes a detector which directly or indirectly detects a leakage light leaking outside of the light guide path from the light guide path.
    Type: Grant
    Filed: September 17, 2016
    Date of Patent: March 20, 2018
    Assignee: OLYMPUS CORPORATION
    Inventors: Yoshinori Tanaka, Satoshi Ohara
  • Patent number: 9897761
    Abstract: The invention relates to an optical fiber mounted photonic integrated circuit device where the tolerance in the positioning of the coupling between a single mode optical fiber and an optical waveguide provided in the photonic integrated circuit device is increased. A second optical waveguide of which the cross-section of the core is in the form of a slab having a width that is greater than the mode diameter of the single mode optical fiber, and which is tapered in such a manner that the thickness of the core is reduced as the location is closer to the connection portion with the single mode optical fiber, is provided on the input/output end side of the first optical waveguide through which light propagates in such a manner that the inclined connection end surface of the single mode optical fiber is coupled to the upper surface of the second optical waveguide.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 20, 2018
    Assignees: FUJITSU LIMITED, PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION
    Inventors: Tomoyuki Akiyama, Tsuyoshi Aoki
  • Patent number: 9857249
    Abstract: A load and stress of a tensioner may be determined from the change in the strain of the tensioner. The strain of the tensioner may be detected by an optical device having a Fiber Bragg Grating (FBG) that is attached to the tensioner. An electrical signal may be generated in response to the detected change in the mechanical strain of the tensioner by processing the light reflected from an optical fiber coupled to the optical device. The electrical signal may be processed to calculate a load on the tensioner. The calculated load may be stored and analyzed, along with previously-stored values for the load, to determine the condition of the tensioner system, and whether the tensioner system requires maintenance.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 2, 2018
    Assignee: Transocean Sedco Forex Ventures Limited
    Inventor: Aaron Barr
  • Patent number: 9817189
    Abstract: Embodiments of present invention provide a digital dispersion compensation module. The digital dispersion compensation module includes a multi-port optical circulator; and a plurality of dispersion compensation units connected to the multi-port optical circulator, wherein at least one of the plurality of dispersion compensation units includes a fiber-bragg grating (FBG) having a first port and a second port; and an optical switch being capable of selectively connecting to one of the first port and the second port of the FBG, wherein the at least one of the plurality of dispersion compensation units is adapted to provide a positive dispersion to an optical signal, from the multi-port optical circulator, when the optical switch connects to the first port of the FBG and is adapted to provide a negative dispersion to the optical signal when the optical switch connects to the second port of the FBG.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: November 14, 2017
    Inventors: Tongqing Wang, Dobby Lam, Jinghui Li
  • Patent number: 9737198
    Abstract: The present invention relates, generally, to controlling a steerable instrument having an elongate body. More particularly, the present invention relates to a system and method for sensing the shape of a steerable instrument and controlling the steerable instrument in response to a control signal from a user input device and a shape signal corresponding to the sensed shape of at least a portion of the steerable instrument. The present invention also relates to a system for sensing the shape of a flexible instrument with an optical shape sensor.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: August 22, 2017
    Assignee: Intuitive Surgical Operations, Inc.
    Inventors: Keith P. Laby, Robert M. Ohline, Christoph M. Pistor, Charles E. Swinehart, Bruce R. Woodley, Amir Belson
  • Patent number: 9709747
    Abstract: Embodiments of present invention provide a digital dispersion compensation module. The digital dispersion compensation module includes a multi-port optical circulator; and a plurality of dispersion compensation units connected to the multi-port optical circulator, wherein at least one of the plurality of dispersion compensation units includes a fiber-bragg grating (FBG) having a first port and a second port; and an optical switch being capable of selectively connecting to one of the first port and the second port of the FBG, wherein the at least one of the plurality of dispersion compensation units is adapted to provide a positive dispersion to an optical signal, from the multi-port optical circulator, when the optical switch connects to the first port of the FBG and is adapted to provide a negative dispersion to the optical signal when the optical switch connects to the second port of the FBG.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: July 18, 2017
    Inventors: Tongqing Wang, Dobby Lam, Jinghui Li
  • Patent number: 9588293
    Abstract: Various particular embodiments include a primary waveguide including an end section; cantilevered waveguides, each cantilevered waveguide including an end section disposed adjacent the end section of the primary waveguide; and control pins for applying an electrical bias to the cantilevered waveguides to selectively displace the end sections of the cantilevered waveguides away from the end section of the primary waveguide.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: March 7, 2017
    Assignee: International Business Machines Corporation
    Inventors: John J. Ellis-Monaghan, Brendan S. Harris, Vibhor Jain, Thomas Kessler, Yves T. Ngu, Sebastian T. Ventrone
  • Patent number: 9575254
    Abstract: Embodiments of present invention provide a digital dispersion compensation module. The digital dispersion compensation module includes a multi-port optical circulator; and a plurality of dispersion compensation units connected to the multi-port optical circulator, wherein at least one of the plurality of dispersion compensation units includes a fiber-bragg grating (FBG) having a first port and a second port; and an optical switch being capable of selectively connecting to one of the first port and the second port of the FBG, wherein the at least one of the plurality of dispersion compensation units is adapted to provide a positive dispersion to an optical signal, from the multi-port optical circulator, when the optical switch connects to the first port of the FBG and is adapted to provide a negative dispersion to the optical signal when the optical switch connects to the second port of the FBG.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: February 21, 2017
    Inventors: Tongqing Wang, Dobby Lam, Jinghui Li
  • Patent number: 9528893
    Abstract: An optical fiber sensor (100) can be used to measure pressure with high sensitivity and fine resolution. As a (108) at the end of the sensor expands or contracts, the spectrum of a beam reflected from the end of fiber shifts, producing a change linked to pressure exerted on the sensor. Novel aspects of the present inventive sensor include the direct bonding of a silica thin film diaphragm (110) to the optical fiber with localized or confined heating and a uniform thickness of the diaphragm. The resulting sensor has a diameter that matches the diameter of the optical fiber. Because the sensor is all silica, it does not from temperature-induced error. In addition, the sensor can be very sensitive because the diaphragm can be very thin; it can also make highly repeatable measurements due to its very uniform thickness.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: December 27, 2016
    Assignee: University of Massachusetts
    Inventors: Wenhui Wang, Xingwei Vivian Wang, Kai Sun, Nan Wu
  • Patent number: 9494416
    Abstract: Disclosed herein is a method for sensing one or more selected parameters related to a structure of interest, for example, the shape of an isolated structure. A cable is attached to the structure of interest at one or more attachment points. The cable contains one or more optical fibers. One or more light signals are transmitted into the one or more optical fibers and then detected to form a data set. The data set is compared with information known about the one or more attachment points to determine error values. The error values are then combined with the data set to determine the selected parameters associated with the structure.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: November 15, 2016
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Roger Glen Duncan, Matthew Thomas Raum, Christopher H. Lambert
  • Patent number: 9484146
    Abstract: The invention relates to a high voltage transformer (6) having a sensor system (30) for monitoring physical characteristic variables. In particular, said sensor system has at least one sensor (1) that comprises a glass fiber (3) with a sensor head (2). Said sensor head supports a plurality of Bragg gratings (7, 8, 9). An evaluation unit (10) is associated with the sensor system and is connected to the at least one sensor head via said glass fiber. The invention is based on the general inventive concept of arranging the sensors of the sensor system between successive windings (4, 5) of the high voltage transformer using spacers. In addition, the use of a plurality of Bragg gratings in the sensor head ensures that at least one of the Bragg gratings determines the actual physical characteristic variables such as temperature or contact force (A).
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: November 1, 2016
    Assignee: MASCHINENFABRIK REINHAUSEN GMBH
    Inventors: Ansgar Hinz, Frank Micksch
  • Patent number: 9459164
    Abstract: The present disclosure provides an optical sensing apparatus for measuring a change in a first property. The optical sensing apparatus comprises first and second optical fibre portions and a sensing region for exposing both the first and second optical fibre portions to a change in an applied force. The force is, or is related to, the first property and has a component that is transversal to the optical fibre portions. The apparatus further comprises a holder for holding the first and second optical fibre portions in the sensing region. The first and second optical fibre portions are arranged relative to each other such that the change in the force results in a first change of an optical property of the first optical fibre portion and in a second change of the optical property of the second optical fibre portion and wherein the first change differs from the second change.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: October 4, 2016
    Assignee: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
    Inventors: John William Arkwright, Simon Adam Maunder, Hsiao-Chuan Wang
  • Patent number: 9453770
    Abstract: A strain measurement device is provided. The strain measurement device includes at least one filiform strain sensor and a support of longilinear shape on which the filiform strain sensor is positioned. The strain measurement device also includes a stiffener.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: September 27, 2016
    Assignee: AIRBUS OPERATIONS S.A.S.
    Inventors: Marc Sartor, Patricia Morgue, Manuel Paredes
  • Patent number: 9389070
    Abstract: A monitoring device is provided that is used for the monitoring of an area of building or land, including an optical strand used as a sensor, one optical source for emitting an optical emission signal transmitted in the optical strand, and one optical analogue detector for detecting an intensity of an optical return signal corresponding to the optical emission signal returning from the optical strand. The monitoring device is arranged as a compact unit and includes a controller for alternately activating and deactivating the emission of the optical source so that a ratio between the non-emission duration and the emission duration is greater than 5000. A monitoring system is also provided including such a monitoring device, and a monitoring method carried out in the monitoring device.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: July 12, 2016
    Assignee: OSMOS SA
    Inventor: Bernard Hodac
  • Patent number: 9360388
    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: Grant
    Filed: June 7, 2013
    Date of Patent: June 7, 2016
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Carl W. Stoesz, Sydnee Marie Hammond
  • Patent number: 9329203
    Abstract: Methods for fabricating ultra-sharp nanoprobes can include the steps of providing a wafer, and patterning a silicon layer on the wafer with a plurality of geometric structures. The geometric structures can be patterned using electron-beam lithography or photolithography, and can have circular, triangular or other geometric shapes when viewed in top plan. The methods can further include the step of depositing a non-uniform cladding on the geometric structures using plasma enhanced chemical vapor deposition (PECVD) techniques, and then wet-etching the wafer. The non-uniform nature of the cladding can result in more complete etching in the areas where the cladding has lower density and incomplete etching in the areas of higher density of the non-uniform cladding. The different etching rates in the proximity of at least adjacent two geometric structures can result in the formation of ultra-sharp nanoprobes.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: May 3, 2016
    Assignee: The United States of America, as Represented by the Secretary of the Navy
    Inventors: Joanna Ptasinski, Stephen D. Russell
  • Patent number: 9304018
    Abstract: A measurement apparatus includes a body suit for a body that includes an appendage having a pivotable joint, the body suit comprising a sleeve to cover the appendage, wherein a first portion of the sleeve is configured to cover the pivotable joint. One or more multi-core optical fiber sensors is/are within or on the sleeve in a routing pattern that is substantially aligned with a longitudinal axis of the sleeve except within the first portion and that is at least partially transverse to the longitudinal axis within the first portion. An optical shape sensing system coupled to the one or more multi-core optical fiber sensors sends light into the one or more multi-core optical fiber sensors and determines a position of each of the multiple appendages based on reflected optical signal measurements detected from one or more multi-core optical fiber sensors.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: April 5, 2016
    Assignee: Intuitive Surgical Operations, Inc.
    Inventors: Matthew A. Davis, Eugene Malinowski, Jason L. Chevalier, Alaina M. McGregor, Matthew Reaves
  • Patent number: 9297710
    Abstract: A method and device for the detection of impact events on a security barrier. A hollow rebar is farmed within a security barrier, whereby the hollow rebar is completely surrounded by the security barrier. An optical fiber passes through the interior of the hollow rebar. An optical transmitter and an optical receiver are both optically connected to the optical fiber and connected to optical electronics. The optical electronics are configured to provide notification upon the detection of an impact event at the security barrier based on the detection of disturbances within the optical fiber.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: March 29, 2016
    Assignee: U.S. Department of Energy
    Inventor: Ross E. Pies
  • Patent number: 9268086
    Abstract: A photonic apparatus comprises an integrated waveguide, an integrated resonator in the form of a microtoroid and a thermally reflowable film. The reflowable film comprises a first film area and a second film area. The reflowable film is one of a thin film and a stack of thin films. The first film area is thermally reflown, the microtoroid is formed in the thermally reflown first film area. The second film area is not reflown in the immediate vicinity of the microtoroid. The microtoroid is optically coupled to the integrated waveguide located on or located within one of or both of the first or second film areas. The first and second film areas are directly connected to each other. The microtoroid has an edge extending along a circumference. The microtoroid can be a non-inverted or an inverted microtoroid, wherein the second film area is inside or outside of the circumference.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: February 23, 2016
    Assignee: RWTH AACHEN
    Inventor: Jeremy Witzens
  • Patent number: 9264793
    Abstract: A wireless headset capable of receiving audio signals transmitted wirelessly and compatible for use in an MRI scanner is disclosed. The headset includes a first wireless module connected to the first earphone and a second wireless module connected to the second earphone. Each wireless module is electrically connected to a speaker in the respective earphone. The first wireless module receives the audio signal from a remote source and coordinates transmission of the audio signal to each of the speakers. The compact nature of each earphone minimizes the length of wire runs. In addition, the headset is made of materials having low magnetic susceptibility such that they will not be affected by the magnetic field from the MRI scanner.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: February 16, 2016
    Assignee: Neocoil, LLC
    Inventors: Brian Brown, Manuel J. Ferrer Herrera, Richard J. Smaglick
  • Patent number: 9243949
    Abstract: This application describes methods and apparatus for fiber optic distributed acoustic sensing (DAS) where microstructured fiber (202), such as holey fiber or photonic crystal fiber is used as the sensing fiber (104). The microstructured fiber is configured so to provide at least one of enhanced sensitivity to a given incident acoustic signal; an enhanced non-linear optical power threshold and directional sensitivity. By configuring the microstructured fiber to be more compliant than an equivalent solid fiber and/or provide a large refractive index variation in response to applied strain, the response to a given acoustic stimulus may be larger than for the equivalent fiber, Providing a hollow core may allow higher optical powers and by providing a directionality to microstructured (304) allows the fiber to be used in a DAS system with a directional response.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: January 26, 2016
    Assignee: OPTASENSE HOLDINGS LIMITED
    Inventors: Roger Ian Crickmore, Alastair Godfrey
  • Patent number: 9186047
    Abstract: An instrument system that includes an elongate instrument body and an optical fiber sensor is provided. The optical fiber sensor includes an elongate optical fiber that is coupled to the elongate instrument body, wherein a portion of the optical fiber is coupled to the elongate instrument body in a manner to provide slack in the fiber to allow for axial extension of the elongate instrument body relative to the optical fiber.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: November 17, 2015
    Assignee: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Bhaskar S. Ramamurthy, Neal A. Tanner, Robert G. Younge, Randall L. Schlesinger
  • Patent number: 9182253
    Abstract: An optical fiber attenuation sensor that includes a first protrusion movable between a first position and a second position, a second protrusion movable between a third position to a fourth position, and an elastic object coupled to the first protrusion that causes the first protrusion to move from the first position to the second position. When the first protrusion moves from the first position to the second position, the second protrusion moves from the third position to the fourth position. The second protrusion is configured and positioned to cause an event in a signal in an optical fiber when the second protrusion moves from the third position to the fourth position.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: November 10, 2015
    Assignee: AFL Telecommunications LLC
    Inventors: Wilfred Courchaine, Roger Vaughn, Theodore Lichoulas
  • Patent number: 9139468
    Abstract: Optical fiber sensors adapted to measure strain or pressure are disclosed. The optical fiber sensor has a lead-in optical fiber having an end surface at a forward end, and a first optical element having a body with an outer dimension, Do, a front end surface coupled to the lead-in optical fiber, a pedestal including a retracted surface that is spaced from the front end surface, the retracted surface at least partially defining an optical cavity, a gutter surrounding the pedestal, the gutter having a gutter depth defining an active region of length, L, the first optical element further exhibiting L/Do?0.5. Also provided are systems including the optical fiber sensor, and methods for manufacturing and using the optical fiber sensor. Numerous other aspects are provided.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: September 22, 2015
    Assignee: University of Maribor
    Inventors: Denis Donlagic, Simon Pevec, Edvard Cibula
  • Patent number: 9109944
    Abstract: The spatial resolution of a fiber optical Distributed Acoustic Sensing (DAS) assembly is enhanced by: arranging an optical DAS fiber with a series of contiguous channels that are sensitive to vibration in a U-shaped loop such that substantially parallel fiber sections include pairs of channels that are arranged at least partially side by side; transmitting a series of light pulses through the optical fiber and receiving back reflections of said light pulses by a light transmission and receiving assembly; and processing the received back reflections such that back reflections stemming from at least one pair of channels that are arranged at least partially side by side are correlated to each other.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: August 18, 2015
    Assignee: Shell Oil Company
    Inventors: Johannis Josephus Den Boer, Andre Franzen, Alex Groen, Daniel Joinson, Arthur Alexander Van Rooyen
  • Patent number: 9109978
    Abstract: A light hood for a fiber identifier tool that includes a head portion having interior photo detectors, a slot for receiving an optical fiber to be tested, and a clamp mechanism for urging the fiber to bend in the vicinity of the photo detectors when the mechanism is operated. The hood has a generally T-shaped body that defines a lower hood portion arranged to engage the clamp mechanism and operate the mechanism when the lower hood portion is pulled downward by a user. An upper hood portion of the body is configured so that when the lower hood portion is engaged with the clamp mechanism and pulled downward, the upper hood portion descends to cover the head portion of the tool including the slot. Outside light is then blocked from entering the slot and reaching the photo detectors whenever a fiber is tested by the tool, thus preventing false indications.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: August 18, 2015
    Assignee: OFS FITEL, LLC
    Inventors: Yue Liang, Denis E. Burek
  • Patent number: 9103736
    Abstract: A method, apparatus and computer-readable medium for determining deformation of a plurality of coupled members. A distributed strain sensor string on a first member is coupled to a distributed strain sensor string on a second member. Signals are obtained from the sensor strings. A subset of strain data relating to sensor strain on the first member and the second member is created. A virtual sensor string is created having a plurality of virtual sensors placed on the first and second members including a joint therebetween. Strain data of sensors in the distributed stain sensor strings is mapped to sensors in the virtual sensor string. The deformation of the plurality of coupled members is determined using the strain data of the virtual sensors.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: August 11, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Jianfeng Chen, Xudong Yang
  • Patent number: 9092955
    Abstract: The present invention relates to a laser apparatus for inducing a photo-mechanical effect. More particularly, the present invention relates to a laser apparatus for outputting a pulsed laser beam and inducing a photo-mechanical effect by controlling pulse energy of the pulsed laser beam.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: July 28, 2015
    Assignee: KONKUK UNIVERSITY INDUSTRIAL COOPERATION CORP
    Inventors: Soon Cheol Chung, Jae Hoon Jun, Jong Rak Park, Seungmoon Choi, Gu In Jung, Byung Chan Min, Hyung Sik Kim, Sung Phil Kim
  • Patent number: 9086340
    Abstract: A tubular insertion device includes a tubular insertion portion including a flexible portion in a predetermined part, bending sensors distributed and arranged in the flexible portion, and an operation support information calculating unit. The operation support information calculating unit extracts operation support information including at least first external force information regarding an external force applied to the tubular insertion portion by a combinational calculation based on detection information from the bending sensors.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: July 21, 2015
    Assignees: OLYMPUS CORPORATION, OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Eiji Yamamoto, Ryo Tojo, Jun Hane, Jun Hasegawa
  • Patent number: 9014518
    Abstract: A bearing comprises a Bragg grated optical fiber to measure one or more parameters of the bearing. The optical fiber is coupled to the bearing in such a way that at least a part of the optical fiber that comprises Bragg grating is curved. The grating which is curved is adapted to the curvature in such a way that the frequency response is well defined and not spread out. This is achieved by arranging the gratings such that even though the fiber is curved the gratings appear to be substantially parallel instead of being influenced by the curvature.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: April 21, 2015
    Assignee: Aktiebolaget SKF
    Inventor: Adam Reedman
  • Publication number: 20150098673
    Abstract: A method of correlating physical locations with respective positions along an optical waveguide can include transmitting to the waveguide a signal including an indication of the transmitting location, and the waveguide receiving the signal. A system for correlating a physical location with a position along an optical waveguide can include a transmitter which transmits to the optical waveguide a signal including an indication of the transmitter location, and a computer which correlates the location to the position, based on the signal as received by the waveguide. A method of determining a position along an optical waveguide at which a signal is transmitted can include modulating on the signal an indication of a transmission location, and transmitting the signal to the waveguide, thereby causing vibration of the waveguide.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 9, 2015
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: David A. BARFOOT, Paul H. MCPHAIL
  • Patent number: 9002153
    Abstract: The present invention relates to an optical fiber cable net including: one elongated optical fiber cable having a front end portion repeatedly moved upward and downward from the lower end portion of the left side of a bee hive-like section along a line forming the bee hive-like section, the optical fiber cable being wound by a plurality of times onto pre-disposed portions where it meets the pre-disposed portions and being moved upward or downward, so that if the front end portion of the optical fiber cable reaches the lower end portion of the right side of the bee hive-like section, the front end portion of the optical fiber cable is sequentially passed through the respective net eyes of the right side of the bee hive-like section, the respective net eyes of the upper side thereof and the respective net eyes of the left side thereof.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: April 7, 2015
    Inventor: Hong Gi Chun