Exclusive-type Receiver Patents (Class 367/149)
  • Patent number: 11237134
    Abstract: The invention relates to an acoustic emission sensor (100). The acoustic emission sensor comprises an optical resonator (10) having a sensor region (11) configured for reflective operation; an optical waveguide (20) which is optically coupled to the optical resonator (10); a light source (31) which is optically coupled to the optical waveguide (20) to apply light to the optical waveguide (20); and a detection device (32) which is optically coupled to the optical waveguide (20) to detect light from the optical resonator (10). The sensor region (11) of the optical resonator (10) comprises a coupling device (50) for mechanically coupling to a solid measurement object (200). The coupling device (50) comprises a first coupling element (51) for transmitting an acoustic emission signal between the sensor region (11) and the solid measurement object (200), and at least one second coupling element (52).
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: February 1, 2022
    Assignee: FOS4X GMBH
    Inventors: Mathias Müller, Markus Schmid, Sascha Kienitz
  • Patent number: 10697853
    Abstract: An optical fiber distributed monitoring system and method is provided. The system includes a laser device, an acousto-optic modulator, a phase matching interferometer, a photoelectric detector and a phase demodulation module. After entering the phase matching interferometer, the Rayleigh backscattering light containing parameter information output from the sensing optical fiber enters the two arms of the phase matching interferometer respectively, and the light of the two arms of the phase matching interferometer is phase-modulated by the first modulation wave and the second modulation wave, respectively and then interfere with each other to generate interference light. The photoelectric detector converts a light signal into an electric signal, and the phase demodulation module processes the electric signal based on the Hilbert algorithm to obtain the parameter change of the environment under test.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: June 30, 2020
    Assignee: Laser Institute of Shandong Academy of Sciences
    Inventors: Ying Shang, Chen Wang, Chang Wang, Jiasheng Ni, Chang Li, Bing Cao, Wen'an Zhao, Sheng Huang, Yang Liu, Xiaohui Liu, Yingying Wang
  • Patent number: 10490969
    Abstract: A method of propagating a laser signal through an optical waveguide and a waveguide laser system provide a novel way of stabilizing the beam emitted by a fiber laser system above the mode instability threshold wherein the beat length of two or more interfering transverse modes of the laser signal in the optical waveguide is modulated in time.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: November 26, 2019
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V., Friedrich-Schiller-Universitaet Jena
    Inventors: Christoph Stihler, César Jáuregui Misas, Jens Limpert, Hans-Juergen Otto, Andreas Tuennermann, Fabian Stutzki
  • Patent number: 10481107
    Abstract: A scanning apparatus for measuring the attenuation of radiation passing from a radiation source along a radiation path to a radiation detector includes a source of radiation; at least one radiation detector capable of detecting radiation emitted by the source a data processor associated with the at least one radiation detector for calculating a property of material present in a linear radiation path between the source and the at least one detector; and a spacer arranged between the source and the at least one detector. The spacer defines a space which is capable of excluding water and having an average density which is less than 1 gcm?3. The provision of a spacer in the radiation path enables more radiation to be passed along the radiation path because water can be replaced with a material which is less attenuating to radiation.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: November 19, 2019
    Assignee: Johnson Matthey Public Limited Company
    Inventors: James Campbell, Emanuele Ronchi
  • Patent number: 10241229
    Abstract: A disclosed subsurface electromagnetic field monitoring system includes at least one fiberoptic cable to optically communicate measurements from an array of electromagnetic field sensors in a borehole. The array of electromagnetic field sensors includes a distributed feedback fiber laser strain sensor with electromagnetic field sensitivity.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: March 26, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Etienne M. Samson, Tasneem A. Mandviwala, Michel J. Leblanc, Han-Sun Choi
  • Patent number: 10190409
    Abstract: A system that is usable with a well includes a telemetry network; a plurality of receivers that are arranged in groups; and a plurality of concentrators that are associated with the groups of receivers. A given concentrator is adapted to acquire data from an associated group of the receivers, and the concentrators communicate the data to an Earth surface of the well using a plurality of frequencies that are allocated among the concentrators.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: January 29, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Daniel Golparian
  • Patent number: 9927221
    Abstract: Apparatus, systems and methods associated with a pressure-balanced seismic sensor package are disclosed. One example of an apparatus can include a plurality of optical components, a sensor box enclosing the plurality of optical components, and a lid for the sensor box. The plurality of optical components, the sensor box, and the lid form a pressure-balanced seismic sensor package.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: March 27, 2018
    Assignee: PGS Geophysical AS
    Inventors: Robert Alexis Peregrin Fernihough, Brian Anthony Hare
  • Patent number: 9778097
    Abstract: The present application described methods an apparatus for locating and/or monitoring subsea cables (101) having an optical fibre (105) deployed along its length. The optical fibre (105) is connected to a distributed acoustic sensing (DAS) interrogator unit to interrogate the optical fibre to provide a fibre optic DAS sensor. To locate the cable an acoustic stimulus is transmitted into the water from one or more known locations. The time of arrival of an acoustic signal matching the stimulus at the sensing portions of the DAS fibre can be detected and used to determine information about the location of those sensing portions to the known location. The DAS signals returns can also be monitored under ambient conditions to detect any signals indicative of likely damage to the cable.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: October 3, 2017
    Assignee: Optasense Holdings Limited
    Inventor: Magnus McEwen-King
  • Patent number: 9690164
    Abstract: An acousto-optic crystal optical waveguide is applicable to an acoustic wave sensor for sensing acoustic wave, wherein the acousto-optic crystal optical waveguide includes an acousto-optic crystal core and an inner cladding layer covering the acousto-optic crystal core. The acoustic wave is able to change the refraction index of the acousto-optical crystal optical waveguide to make a light beam with specific wavelength refracting to outside of the acousto-optic crystal waveguide when a light beam transmits through the acousto-optic crystal optical waveguide. Objective of acoustic wave sensing is achieved by detecting wavelength and intensity variation of the light beam transmits through the acousto-optic crystal optical waveguide.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: June 27, 2017
    Assignee: NATIONAL SUN YAT-SEN UNIVERSITY
    Inventors: Jau-Sheng Wang, Yung-Hsin Tseng
  • Patent number: 9651436
    Abstract: An interferometric optical fiber sensor system comprises a light source, a first coupler optically connected to the light source, a first optical path for inputting measurement light, a second optical path for inputting reference light, a second coupler for combining the first and second optical paths together, a photodetector for measuring modulation of the measurement light and the reference light, and a coil for modulating with a stress exerted thereon the measurement light and the reference light. The first optical path has an optical length equal to that of the second optical path. The first optical path has a first delay line, while the second optical path has a second delay line. The coil is disposed between the first delay line and the second coupler and between the second delay line and the first coupler.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: May 16, 2017
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Takafumi Ohtsuka
  • Patent number: 9448319
    Abstract: A system and method for an acoustic sensor array of a bundle of N different length optical fiber sensors. A coherent or noncoherent light source is input to each fiber for transmission along the length of the fiber. The light signal is reflected back at the fiber end point, and the resulting reflected light is diverted to an optical receiver so that perturbations of intensity and/or phase may be extracted.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: September 20, 2016
    Assignee: Lockheed Martin Corporation
    Inventor: Byron W. Tietjen
  • Patent number: 9347312
    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 22, 2010
    Date of Patent: May 24, 2016
    Assignee: WEATHERFORD CANADA PARTNERSHIP
    Inventors: Andre R. Vincelette, Jason S. Kiddy, John B. Niemczuk, Christopher S. Baldwin, Paul Lefebvre
  • Patent number: 9327961
    Abstract: The present invention relates to the field of electrodynamic speakers. Particularly, the present invention relates to an electrodynamic speaker structure having MEMS technology. More particularly, the invention relates to such a structure comprising stator-forming means, diaphragm-forming means, and resiliently shape-changing means for connecting such means.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: May 3, 2016
    Assignees: UNIVERSITE DU MAINE, UNIVERSITE PARIS-SUD 11
    Inventors: Guy Lemarquand, Valerie Lemarquand, Elie Marie Lefeuvre, Marion Alexandra Laurence Woytasik, Johan Moulin, Fabien Jean François Parrain
  • Patent number: 9285594
    Abstract: Methods for producing a laser-guided underwater electrical discharge are provided. One or more electrodes defining a desired electrical discharge path are situated in a body of water and are attached to an external electrical power supply. A high-powered, intense laser beam is fired through one or more focusing lenses into the water. The laser beam forms an optical filament in the water, which in turn forms an ionized channel having a much greater conductivity than the surrounding water. An external power supply drives an electrical discharge along the path of the ionized channel due to its greater conductivity.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: March 15, 2016
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Theodore G. Jones, Antonio C. Ting, Daniel F. Gordon, Michael H. Helle
  • Patent number: 9273546
    Abstract: An apparatus and method conducting downhole measurement operations in a borehole penetrating an earth formation. The apparatus may include a module configured to be conveyed in a borehole and to receive at least one device. The module may receive the device internally or in one or more recessed areas. A housing with at least one opening may encompass the exterior of the module. The apparatus may have a first position that allows access to the module through the at least one opening, and a second position that isolates the module from the exterior of the housing. The method may include conducting downhole measurement related operations using the apparatus. The method may include moving the housing and module between the first position and the second position.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: March 1, 2016
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Ansgar Cartellieri, Gunnar Bothmann, Christopher Jakubeit, Detlev Benedict
  • Patent number: 9251983
    Abstract: A switch for a marine seismic sensor. The switch includes a bellows having a closed end, a side portion and an open end, wherein the side portion connects the closed end to the open end, the closed end includes a conductive surface, and the side portion acts as a spring; a base plug that includes first input and first output contacts on a first side and second input and second output contacts on an opposite side; and a plug located in the open end of the bellows and configured to form a chamber, inside which the second input contact and the second output contact are provided. The conductive surface short-circuits the second input contact and the second output contact when a pressure larger than a predetermined pressure (P) acts on the conductive surface.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: February 2, 2016
    Assignee: SERCEL INC.
    Inventor: Paul Wentzler
  • Patent number: 9103713
    Abstract: The invention consists of an optical hydrophone, an optical fiber element forming a laser cavity, housed in a mechanical structure which comprises an open cylindrical rigid body, defining the cavity enclosing a fluid and in which the optical fiber element is housed, and closed at its ends by two end caps which keep the optical fiber element permanently under tension, in a longitudinal rectilinear position inside the cavity. The end caps are configured in such a way that when the exterior pressure varies, they undergo a deformation giving rise to a variation in the length of the optical fiber element and that when the temperature varies, they undergo a deformation giving rise to a variation in the length of the optical fiber element which compensates for that induced on this element by the temperature variation. The mechanical structure furthermore exhibits one or more orifices allowing equilibration of the static pressures.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: August 11, 2015
    Assignee: Thales
    Inventors: Francois-Xavier Launay, Martine Doisy, Raphael Lardat, Gerard Roux
  • Patent number: 9086764
    Abstract: The present invention relates to a method for determining an acoustic response attributed to a location of an impact, in particular a touch event, on a surface of an object including at least one transducer comprising the steps of: a) receiving an acoustic signal from at least one transducer, wherein the signal corresponds to a predetermined excitation (E) at at least one location on the surface; b) determining an acoustic response based on the acoustic signal received in step a); and c) determining the acoustic response attributed to at least one location on the surface different to the location of the predetermined excitation based on at least two different acoustic responses determined in step b).
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: July 21, 2015
    Assignee: Elo Touch Solutions, Inc.
    Inventors: Alexandre LeBlanc, Ros Kiri Ing, Olivier Schevin
  • Patent number: 9081111
    Abstract: A method of providing seismic data (such as marine seismic data). A seismic source is actuated at a plurality of source locations (S2, S4). For each source location, a multicomponent seismic measurement is performed at least one receiver location (S3). A reconstructing method is applied to each multicomponent measurement to obtain additional data corresponding to source locations additional to the source locations at which the source was actuated (S5). The additional data are output and/or used (S6).
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: July 14, 2015
    Assignee: Statoil Petroleum AS
    Inventors: Lasse Amundsen, Harald Westerdahl, Mark Thompson
  • Patent number: 9042202
    Abstract: There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterized by a buffer layer 2 which is provided with a cut-out 50 and a sensor element arranged in the cut-out 50. There is also provided an associated hydrophone for integration into the seismic streamer cable. The hydrophone is characteristic in a split-element sensor base 10, 11 being suited for efficient mounting into the cut-outs 50 of the seismic cable. There is also provided an associated accelerometer for integration into the seismic streamer cable. The accelerometer is characteristic by a split-element sensor base 30, 35 for being efficiently arranged into the cut-outs 50 of the seismic cable. A method of producing a seismic streamer cable according to the invention incorporating a hydrophone or accelerometer according to the invention is also provided.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: May 26, 2015
    Assignee: Optoplan AS
    Inventors: Arne Berg, Jon Thomas Kringlebotn
  • Patent number: 8960008
    Abstract: A device and system is provided for amplifying vibrations resulting from underwater acoustic signals. In operation, a laser interrogation beam is directed along an axis at the retro-reflector device and is responsive to reflections directed along the axis of the interrogation beam. The retro-reflector device reflects a signal back to a source and a tracking signal superimposed on an interrogation beam enables continuous sensing of the reflected signal to reduce signal dropout. A glint tracker is provided for steering the tracking beam on the surface. A tracker system superimposes the tracking and interrogation beams and is responsive to reflected glints in order to establish a directional location. An interferometer responsive to the reflected interrogation beam produces an interference signal for enabling continuous measurement of surface vibrations.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: February 24, 2015
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Fletcher A Blackmon, Lynn T Antonellli, Anthony J Kalinowski
  • Publication number: 20140340984
    Abstract: In various embodiments, a multilayer jacket for a seismic streamer is disclosed. The multilayer jacket comprises an outer layer comprising a water-resistant and wear-resistant material. The multilayer jacket further comprises an inner layer comprising a hydrocarbon impermeable material.
    Type: Application
    Filed: May 20, 2013
    Publication date: November 20, 2014
    Applicant: Teledyne Instruments, Inc., d/b/a Teledyne Geophysical Instruments
    Inventor: Richard D. Burton
  • Publication number: 20140211589
    Abstract: A method, system and a marine node for recording seismic waves underwater. The node includes a first module configured to house a seismic sensor; bottom and top plates attached to the first module; a second module removably attached to the first module and configured to slide between the bottom and top plates, the second module including a first battery and a data storage device; and a third module removably attached to the first module and configured to slide between the bottom and top plates, the third module including a second battery.
    Type: Application
    Filed: January 31, 2013
    Publication date: July 31, 2014
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Peter MAXWELL
  • Patent number: 8675451
    Abstract: The invention provides a method for acoustically and optically characterizing an immersed object of interest by generating a serial plurality of acoustic and optical illumination pulses through a liquid. In addition to the spectral analysis/imaging of objects/environment made possible by the white-light illumination, a target material can be ablated, generating an ionized plume to spectrally identify the target's constituent atoms.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: March 18, 2014
    Inventor: Kevin Kremeyer
  • Publication number: 20130343162
    Abstract: The present invention concerns a hydrophone signal limiting shunt switch, electrically associated and physically conjoined with a conventional hydrophone, for limiting hydrophone signal operability to water depths less than a predetermined, proscribed depth. The primary components of the shunt switch are a protected plunging bolt, at least one disk spring and an electrically conducting foot, none of which are ever in direct contact with the ocean environment. Flexure of the disk spring is the sole determinant of switch actuation. Upon sensing a predetermined, proscribed operating depth, the protected plunging bolt forces the electrically conducting foot to shunt the electrical connection between the associated hydrophone and the hydrophone transmission cable, consequently, quenching the hydrophone signal at the proscribed depth.
    Type: Application
    Filed: June 26, 2012
    Publication date: December 26, 2013
    Applicant: High Tech, Inc.
    Inventors: Brian Stephen Spychalski, Scott Arthur Erickson
  • Patent number: 8600592
    Abstract: A submarine homing system includes an acoustic emitter configured to emit an acoustic signal comprising at least two narrow-band tones, each narrow-band tone having a respective predetermined center frequency. An acoustic receiver is configured to receive the acoustic signal from the acoustic emitter, and produce one or more receiver signals. A processor is operatively connected to the acoustic receiver. The processor is configured to process the receiver signals to calculate a direction between the acoustic receiver and the acoustic emitter.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: December 3, 2013
    Assignee: Her Majesty the Queen in Right of Canada as Represented by the Minister of National Defence
    Inventors: Garry J. Heard, Carmen E. Lucas, Nicos Pelavas, Derek A. Clark, Gordon R. Ebbeson, Richard A. G. Fleming, George Schattschneider
  • Patent number: 8599649
    Abstract: A sensor system is provided comprising a Laser Doppler Vibrometer (LDV) that senses underwater sound via vibrations on an ice surface. In operation, a beam of the LDV measures a surface velocity and therefore an associated pressure signal from the ice surface due to an impinging underwater sound. The beam reflected from the surface carries the acoustic information back to the LDV. Using interferometry to derive the acoustic signal carried on the reflected beam; the LDV provides acoustic signal data in the form of a voltage signal. A computer processes the voltage signal as data that estimates a sound pressure level of the underwater source.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: December 3, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Lynn T. Antonelli, Fletcher A. Blackmon
  • Patent number: 8520472
    Abstract: Improved laser sensors (10) employing doped laser crystals (24) for transducing output proportional to forces impinging upon the sensors. The disclosed sensors are compact, low powered and may be constructed relatively inexpensively from readily available materials. The disclosed sensors eliminate the need for costly, optical power-sapping fiber connections at the laser crystals. According to certain embodiments, the disclosed sensors are configured for local recovery of output signals using conventional digital telemetry. According to other embodiments, the sensors generate output through a dense wavelength division multiplexing (DWDM) laser (28), thereby allowing remote recovery without the need for frequency division multiplexing and issues involved with preloading the sensors to produce beat frequencies in unique bands.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: August 27, 2013
    Assignee: 3 Phoenix, Inc.
    Inventors: Joseph Murray, Gregg Johnson
  • Patent number: 8507907
    Abstract: It is to provide a semiconductor memory device in which high voltage is not needed in writing, a defect is less likely to occur, the writing time is short, and data cannot be rewritten without an increase in cost. The semiconductor memory device includes a memory element which includes a diode-connected first transistor, a second transistor whose gate is connected to one terminal of a source electrode and a drain electrode of the diode-connected first transistor, and a capacitor connected to the one terminal of the source electrode and the drain electrode of the diode-connected first transistor and the gate of the second transistor.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: August 13, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yasuyuki Takahashi, Toshihiko Saito
  • Patent number: 8499637
    Abstract: A device and system is provided for amplifying vibrations resulting from underwater acoustic signals. In operation, a laser interrogation beam is directed along an axis at the retro-reflector device and is responsive to reflections directed along the axis of the interrogation beam. The retro-reflector device reflects a signal back to a source and a tracking signal superimposed on an interrogation beam enables continuous sensing of the reflected signal to reduce signal dropout. A glint tracker is provided for tracking the tracking beam on the surface. A tracker system superimposes the tracking and interrogation beams and is responsive to reflected glints in order to establish a directional location. An interferometer responsive to the reflected interrogation beam produces an interference signal for enabling continuous measurement of surface vibrations.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: August 6, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Fletcher A. Blackmon, Lynn T. Antonelli, Anthony J. Kalinowski
  • Patent number: 8427906
    Abstract: An ultrasound system that detects a characteristic of an ultrasound wave. The system includes a circuit member defining a sensing portion operable to be exposed to the ultrasound wave. The system also includes a current generating device that generates a current in the sensing portion of the circuit member. Furthermore, the system includes a voltage sensor that detects a voltage across the sensing portion due to the exposure to the ultrasound wave to thereby detect the characteristic of the ultrasound wave.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: April 23, 2013
    Assignee: The Regents of The University of Michigan
    Inventors: Russell S. Witte, Ragnar Olafsson, Sheng-Wen Huang, Timothy L Hall, Matthew O'Donnell
  • Publication number: 20130033969
    Abstract: A sensor system includes a pressure sensor portion, and an accelerometer. Outputs from the sensor system are handled by a signal processing system that includes a first beamforming module for inputs from a pressure sensor, a second beamforming module for inputs from an accelerometer, and an adaptive beam interpolation module. A method for signal processing signals from both a pressure sensor and an accelerometer. An array of sensors transfers data wirelessly.
    Type: Application
    Filed: May 3, 2012
    Publication date: February 7, 2013
    Inventors: Thomas J. Barnard, Thomas M. Canavan, Dane E. Reiner, Jennifer L. Pawelczyk, Casey D. Dyer, Joseph E. Nickerson, Hema Sundaramurthy, Andrew J. Cleary, John H. Goodemote, Dennis C. Stimson, Howard R. Taylor
  • Publication number: 20120294122
    Abstract: A marine seismic exploration method and system comprised of continuous recording, self-contained ocean bottom pods characterized by low profile casings. An external bumper is provided to promote ocean bottom coupling and prevent fishing net entrapment. Pods are tethered together with flexible, non-rigid, non-conducting cable used to control pod deployment. Pods are deployed and retrieved from a boat deck configured to have a storage system and a handling system to attach pods to cable on-the-fly. The storage system is a juke box configuration of slots wherein individual pods are randomly stored in the slots to permit data extraction, charging, testing and synchronizing without opening the pods. A pod may include an inertial navigation system to determine ocean floor location and a rubidium clock for timing. The system includes mathematical gimballing. The cable may include shear couplings designed to automatically shear apart if a certain level of cable tension is reached.
    Type: Application
    Filed: August 2, 2012
    Publication date: November 22, 2012
    Applicant: Fairfield Industries Incorporated
    Inventors: Clifford H. RAY, Glenn D. Fisseler, James N. Thompson, Hal B. Haygood
  • Patent number: 8290316
    Abstract: The general field of the invention is that of fiber-optic sensors comprising at least one measurement optical fiber having an optically pumped doped amplifying medium, the optical characteristics of which are sensitive to a physical quantity, the fiber having at least one Bragg grating. The fiber is designed so as to generate, in the amplifying medium, two optical waves having different optical frequencies that propagate in the same direction after reflection on the Bragg grating and are emitted by the amplifying medium, the two optical frequencies depending on the physical quantity. The two waves may be generated using either a birefringent polarization-maintaining fiber or a DBR (Distributed Bragg Reflector) laser cavity. Notably, this sensor may be used as a hydrophone.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: October 16, 2012
    Assignee: Thales
    Inventors: Stéphanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy, Loïc Morvan, Jean-Paul Pocholle
  • Patent number: 8228760
    Abstract: A system and method is provided for using acoustical pulses generated from an airborne laser source to locate objects under water. An array of acoustic sensors, such as passive sonobuoys at the ocean surface, is deployed in known or determinable locations by aircraft. Each area surrounded by acoustic sensors comprises a search cell, within which sonar scattering data can be used to locate objects. Following sonobuoy deployment, the aircraft uses the laser to rapidly generate many laser-acoustic pulse sources within each search cell, which in turn generate spherical acoustic pulses traveling through the water. The acoustic sensors receive the acoustic pulses, either on a direct path or on a scattered path after the pulse strikes an underwater object. The sensors record the acoustic signatures of the received pulses and transmit data of the recorded acoustic pulses to a processor such as processor on a nearby ship.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: July 24, 2012
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Theodore G. Jones, Tsih C. Tang, Steven L. Means, Edward R. Franchi, Kwang B. Yoo
  • Patent number: 8223590
    Abstract: A system and method is provided for using acoustical pulses generated from an airborne laser source to locate objects under water. An array of acoustic sensors, such as passive sonobuoys at the ocean surface, is deployed in known or determinable locations by aircraft. Each area surrounded by acoustic sensors comprises a search cell, within which sonar scattering data can be used to locate objects. Following sonobuoy deployment, the aircraft uses the laser to rapidly generate many laser-acoustic pulse sources within each search cell, which in turn generate spherical acoustic pulses traveling through the water. The acoustic sensors receive the acoustic pulses, either on a direct path or on a scattered path after the pulse strikes an underwater object. The sensors record the acoustic signatures of the received pulses and transmit data of the recorded acoustic pulses to a processor such as processor on a nearby ship.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: July 17, 2012
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Theodore G. Jones, Tsih C. Yang, Steven L. Means, Kwang B. Yoo, Edward R. Franchi
  • Patent number: 8203911
    Abstract: The invention provides a method for acoustically and optically characterizing an immersed object of interest by generating a serial plurality of acoustic and optical illumination pulses through a liquid. In addition to the spectral analyses/imaging of objects/environment made possible by the white-light illumination, a target material can be ablated, generating an ionized plume to spectrally identify the target's constituent atoms.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: June 19, 2012
    Inventor: Kevin Kremeyer
  • Patent number: 8130594
    Abstract: A hydrophone (10) for immersion in a liquid body defining a depth-dependent static pressure and a dynamic pressure. The hydrophone (10) includes a pressure-bearing element (11) for exposure to the liquid body; a motion sensor (13) spaced apart from the pressure bearing element (11); and a dilatant coupling material (14) disposed intermediate the pressure-bearing element (11) and the motion sensor (13) so as to mechanically transmit movements substantially corresponding to the dynamic pressure from the pressure-bearing element (11) to the motion sensor (13). The dilatant coupling material (14) does not transmit movements to the motion sensor (13) that substantially correspond to the depth-dependent static pressure.
    Type: Grant
    Filed: December 16, 2006
    Date of Patent: March 6, 2012
    Assignees: Thales Underwater Systems Pty Limited, The Commonwealth of Australia
    Inventor: Ian Bedwell
  • Patent number: 8094519
    Abstract: A fiber optic hydrophone has a reflective diaphragm having an exposed face and a reflective protected face, at least one transmitting multimode optical fiber having an end spaced apart from the protected face of the diaphragm positioned to emit light toward the diaphragm housing, and a reservoir. A cavity is defined by the diaphragm and the interior surface of the housing. Silicone oil and a compliant elastomeric material with embedded air bubbles are located in the cavity. Ports between the cavity and the reservoir and the reservoir and the exterior of the hydrophone allow static pressure communication between the cavity and the exterior of the hydrophone. The fiber optic probe can have one transmitting multimode optical fiber and six receiving multimode optical fibers, or more or fewer optical fibers. A grating can protect the diaphragm from environmental damage.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: January 10, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Nicholas Lagakos, Joseph A. Bucaro, Jacek Jarzynski, Barbara Jarzynski, legal representative
  • Publication number: 20110305116
    Abstract: A fiber optic hydrophone has a reflective diaphragm having an exposed face and a reflective protected face, at least one transmitting multimode optical fiber having an end spaced apart from the protected face of the diaphragm positioned to emit light toward the diaphragm housing, and a reservoir. A cavity is defined by the diaphragm and the interior surface of the housing. Silicone oil and a compliant elastomeric material with embedded air bubbles are located in the cavity. Ports between the cavity and the reservoir and the reservoir and the exterior of the hydrophone allow static pressure communication between the cavity and the exterior of the hydrophone. The fiber optic probe can have one transmitting multimode optical fiber and six receiving multimode optical fibers, or more or fewer optical fibers. A grating can protect the diaphragm from environmental damage.
    Type: Application
    Filed: August 16, 2011
    Publication date: December 15, 2011
    Inventors: Nicholas Lagakos, Joseph A. Bucaro, Jacek Jarzynski, Barbara Jarzynski
  • Patent number: 7979240
    Abstract: The present application relates to a system and method for real-time monitoring and failure prediction of electrical submersible pumps. The design includes generating a failure prediction value with a management system by calculating a percentage change of the respective first measurement values and the corresponding user-supplied stable operating values, the failure prediction value representing likelihood of failure of the electrical submersible pump.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: July 12, 2011
    Assignee: Schlumberger Technology Corporation
    Inventor: Lance I. Fielder
  • Patent number: 7969823
    Abstract: A hydrophone (10) for immersion in a liquid body defining a pressure is disclosed The hydrophone (10) includes a sensor (11) for providing an electrical signal indicative of the pressure; and a transducer (12) electrically connected to the sensor (11). The transducer (12) acts upon a fiber optic cable (15) so as to convert the electrical signal into a corresponding optical output signal for transmission within the fiber optic cable (15). The liquid body defines a depth-dependent static pressure and a dynamic pressure and the sensor (11) provides an electrical signal having a first component indicative of the static pressure and a second component indicative of the dynamic pressure. A filter (16) is electrically connected to the sensor (11) so as to receive (the electrical signal, filter out the first component, and output to the transducer (12) a uttered electrical signal indicative of substantially only the second component.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: June 28, 2011
    Assignees: Thales Underwater Systems Pty Limited, The Commonwealth of Australia
    Inventor: Ian Bedwell
  • Patent number: 7961551
    Abstract: A technique includes obtaining seismic data acquired by at least one seismic sensor. The technique includes processing the seismic data to determine a value that is indicative of a three-dimensional directional propagation attribute of a seismic event based on the seismic data.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: June 14, 2011
    Assignee: WesternGeco L.L.C.
    Inventors: Johan Robertsson, Dirk-Jan Van Manen, Susanne Rentsch
  • Publication number: 20110019179
    Abstract: The general field of the invention is that of fiber-optic sensors comprising at least one measurement optical fiber having an optically pumped doped amplifying medium, the optical characteristics of which are sensitive to a physical quantity, the fiber having at least one Bragg grating. The fiber is designed so as to generate, in the amplifying medium, two optical waves having different optical frequencies that propagate in the same direction after reflection on the Bragg grating and are emitted by the amplifying medium, the two optical frequencies depending on the physical quantity. The two waves may be generated using either a birefringent polarization-maintaining fiber or a DBR (Distributed Bragg Reflector) laser cavity. Notably, this sensor may be used as a hydrophone.
    Type: Application
    Filed: March 16, 2009
    Publication date: January 27, 2011
    Applicant: THALES
    Inventors: Stephanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy, Loic Morvan, Jean-Paul Pocholle
  • Patent number: 7876644
    Abstract: At least two light beams with polarization diversity are generated that each carry a representation of the same information. Separate optic fibers carry each of the at least two beams through a region subject to vibration to a remote location where the information is recovered by an optical receiver based on the separate light beams. Using separate fibers to carry polarization diverse information minimizes polarization noise at the optical receiver due to vibration of the fibers.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: January 25, 2011
    Assignee: Northrop Grumman Guidance and Electronics Company, Inc.
    Inventors: David B. Hall, Paul L. Greene
  • Patent number: 7840105
    Abstract: A fiber optic towed array is provided. The array includes a flexible core upon which is disposed a semi-rigid mandrel. The semi-rigid mandrel has a helical groove formed therein, in which is disposed an optical fiber, the optical fiber including a plurality of fiber gratings. The mandrel is in turn covered with a nylon or fiber screen and encased in a layer of open cell foam, which is encased in a protective covering that includes at least one strength member disposed along a longitudinal axis of the array.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: November 23, 2010
    Assignee: Sabeus, Inc.
    Inventors: Eric Lee Goldner, Fred Demetz
  • Publication number: 20100260013
    Abstract: A hydrophone (10) for immersion in a liquid body defining a depth-dependent static pressure and a dynamic pressure. The hydrophone (10) includes a pressure-bearing element (11) for exposure to the liquid body; a motion sensor (13) spaced apart from the pressure bearing element (11); and a dilatant coupling material (14) disposed intermediate the pressure-bearing element (11) and the motion sensor (13) so as to mechanically transmit movements substantially corresponding to the dynamic pressure from the pressure-bearing element (11) to the motion sensor (13). The dilatant coupling material (14) does not transmit movements to the motion sensor (13) that substantially correspond to the depth-dependent static pressure.
    Type: Application
    Filed: December 16, 2006
    Publication date: October 14, 2010
    Applicant: THALES UNDERWATER SYSTEMS PTY LIMITED
    Inventor: Ian Bedwell
  • Publication number: 20100246329
    Abstract: Improved laser sensors (10) employing doped laser crystals (24) for transducing output proportional to forces impinging upon the sensors. The disclosed sensors are compact, low powered and may be constructed relatively inexpensively from readily available materials. The disclosed sensors eliminate the need for costly, optical power-sapping fiber connections at the laser crystals. According to certain embodiments, the disclosed sensors are configured for local recovery of output signals using conventional digital telemetry. According to other embodiments, the sensors generate output through a dense wavelength division multiplexing (DWDM) laser (28), thereby allowing remote recovery without the need for frequency division multiplexing and issues involved with preloading the sensors to produce beat frequencies in unique bands.
    Type: Application
    Filed: June 13, 2006
    Publication date: September 30, 2010
    Applicant: 3 Phoenix, Inc.
    Inventors: Joseph Murray, Gregg Johnson
  • Patent number: 7751657
    Abstract: Disclosed is an inclinometer system capable of detecting the inclination of the ground using a fiber bragg grating sensor to precisely measure the deformation of the ground. The inclinometer system includes at least one measuring unit, and the measuring unit includes a body provided therein with a receiving part, a frame inserted into the body, a weight member inserted in to the frame and having one end hinged to the frame, the weight member rotating in cooperation to inclination of the body, an optical fiber 5 passing through both the body and the frame such that one end of the optical fiber is fixed to the weight member, a fixing member installed into the frame to fix an opposite end of the optical fiber, and a fiber bragg grating (FBG) sensor attached to the optical fiber.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: July 6, 2010
    Inventor: Geum Suk Lee
  • Publication number: 20100091613
    Abstract: An ultrasound system that detects a characteristic of an ultrasound wave. The system includes a circuit member defining a sensing portion operable to be exposed to the ultrasound wave. The system also includes a current generating device that generates a current in the sensing portion of the circuit member. Furthermore, the system includes a voltage sensor that detects a voltage across the sensing portion due to the exposure to the ultrasound wave to thereby detect the characteristic of the ultrasound wave.
    Type: Application
    Filed: October 13, 2008
    Publication date: April 15, 2010
    Applicant: The Regents of The University of Michigan
    Inventors: Russell S. Witte, Ragnar Olafsson, Sheng-Wen Huang, Timothy L. Hall, Matthew O'Donnell