Nonvibrating Transducer Patents (Class 73/643)
  • Patent number: 11022436
    Abstract: A method of determining a thickness of a region of wall- or plate-like structure which is thinner than a thickness of a surrounding region of the structure due to a cavity in the structure is disclosed. The method comprises comparing a measured time-frequency dispersion map for at least one dispersive guided wave obtained by measuring the structure using guided waves with a reference time-frequency dispersion map obtained by modelling the structure, determining a cut-off frequency, fc, at which the measured time-frequency dispersion map and the reference time-frequency dispersion map differ and calculating the thickness of the thinner region in dependence upon the cut-off frequency.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: June 1, 2021
    Assignee: Guided Ultrasonics Ltd.
    Inventor: Tomasz Pialucha
  • Patent number: 10921290
    Abstract: Laser ultrasonic testing includes a laser apparatus; a splitting unit that splits a pulsed laser from the laser apparatus into first and second lasers; a first pulse width conversion unit that converts a pulse width of the first laser; a first optical system that guides the first laser having the converted pulse width to a test object; a second pulse width conversion unit that converts a pulse width of the second laser; a pulse propagation time adjustment unit that adjusts a propagation time of the second laser having the converted pulse width; a second optical system that guides the second laser having the converted pulse width and adjusted propagation time to the test object; and a detection unit that detects a surface displacement change of the test object caused by an ultrasonic wave generated by the first laser when the second laser is reflected by the test object.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: February 16, 2021
    Assignee: HITACHI, LTD.
    Inventor: Kazuo Ishiyama
  • Patent number: 10823570
    Abstract: A physical quantity sensor includes: a base substrate; a first wiring portion that is fixed to the base substrate; a second wiring portion that is fixed to the base substrate and has at least a part disposed in parallel to the first wiring portion; and an electrode portion that is disposed in the base substrate and has a reference potential. The electrode portion is disposed between the base substrate, and the first and second wiring portions. At least parts of the first and second wiring portions overlap the electrode portion in a plan view.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: November 3, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Kei Kanemoto, Makoto Furuhata
  • Patent number: 10724997
    Abstract: A system and method combine ablation of a surface of a part with inspection of the internal integrity of the part. A laser may direct an ablative laser pulse at the surface of the part sufficient to remove a portion of material from the part surface and to cause the part to produce an ultrasound waveform. A positioning system may provide relative movement of the ablative laser pulse and the part for application of a series of ablative laser pulses at a series of locations over an area of the surface of the part. An ultrasonic detection device may couple to the part to receive the ultrasound waveform and transmit it to a part inspection system that has stored a set of reference waveforms in a control computer. The system compares the ultrasound waveform to one or more of the reference waveforms to detect and characterize anomalies in the part.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: July 28, 2020
    Assignee: The Boeing Company
    Inventors: Panagiotis Emanuel George, Ashley C. Tracey, Hong Hue Tat
  • Patent number: 10537916
    Abstract: An electromagnetic acoustic transducer includes a flux guide surrounded by one or more permanent magnets abutting side faces of the flux guide. The magnetic field from the permanent magnets enters the flux guide where repulsion between the magnetic fields directs at least a portion of the magnetic fields toward a test face abutting a test object. The flux density at the test face is greater than the flux density within the originating permanent magnets. An active portion of a coil disposed between the flux guide and the test object contains conductors that are substantially straight, parallel and carry current in the same direction in order to provide substantially mode pure and uni-directionally polarised excitation of shear waves within the test object.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: January 21, 2020
    Assignee: PERMASENSE LIMITED
    Inventors: Frederic Bert Cegla, Julio Agustin Isla Garcia
  • Patent number: 10469119
    Abstract: A case for an electronic device wherein the electronic device has a receiver coil for wireless charging and the receiver coil is formed in between an inner circle and an outer circle, includes: a hard protective frame constructed to receive the electronic device therein wherein the hard protective frame has a recess which faces the electronic device; and a metal plate constructed to be received in the recess. The metal plate is constructed to enable magnetic retention or attachment of the case to a support having a magnet. The metal plate has a rounded concave edge, and the metal plate does not overlap with the inner circle. Preferably, the rounded concave edge, the inner circle, and the outer circle are substantially symmetrical with respect to a same line.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: November 5, 2019
    Assignee: SPIGEN KOREA CO., LTD.
    Inventor: Dae-Young Kim
  • Patent number: 10454406
    Abstract: A dynamo-electric machine includes a laminated stator, a laminated rotor and a winding system disposed in the laminated stator and/or the laminated rotor and forming a winding overhang on end faces of the laminated stator and/or laminated rotor. The winding system includes a signaling line to detect interturn faults generated by a high heat. An insulation of signaling lines or a wire of the signaling lines is configured to be temperature-sensitive so that a melting point of the insulation or of the wire is about 30 degrees Kelvin above the temperature class of the dynamo-electric machine.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: October 22, 2019
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Marco Köhler, Christoph Adam, Hans Friedrich Steffani, Bernhard Volk
  • Patent number: 10428648
    Abstract: A downhole formation fluid viscometer sensor and method therefor include a viscometer sensing package, a flexible diaphragm, a magnet and electric coil, and a signal pickup assembly. The viscometer sensor may also include a first cavity and a second cavity for mechanical and electric energy transfer. The magnet and electric coil may be driven by external alternating current to generate an electromagnetic force. Silicon oil may be used to fill the first cavity and/or a pressure balance hole may connect the first cavity to an external area. The diaphragm may be a titanium alloy and a ferromagnetic magnet may be attached to the diaphragm. The diaphragm preferably has a thickness from about 0.030 to about 0.040 inches and the magnet and electric coil can propel the diaphragm to vibrate at a frequency from 0 to 100 kHz. Formation fluid viscosity is determined using resonant frequency linewidth, with contributions from the sensor package intrinsic properties removed.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: October 1, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Hua Xia, Lizheng Zhang, Robert Atkinson, Nestor Rodriguez, Christopher Michael Jones, Darren Gascooke
  • Patent number: 10177608
    Abstract: A wireless power transmission system is designed to transmit power through a permeable conductive barrier layer. The system comprises a power transmitting circuit including a first inductive coil. A power receiving circuit includes a second inductive coil located on the opposite side of the barrier layer to the first inductive coil. A biasing magnet or electromagnet is provided and characterised by its ability to substantially saturate the magnetisation of the barrier layer in a region adjacent to the first and second inductive coils.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: January 8, 2019
    Assignee: The Technology Partnership PLC
    Inventor: David Pooley
  • Patent number: 10175093
    Abstract: Embodiments of apparatus for sensing a level of a processing medium in a chemical delivery apparatus are provided herein. In some embodiments, a chemical delivery apparatus includes: a support structure; a container coupled to the support structure to hold a chemical precursor within an interior of the container; an excitation source configured to cause vibrations in an exterior surface of the container; and a measurement device configured to measure a frequency of the vibrations.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: January 8, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventor: Faruk Gungor
  • Patent number: 10018599
    Abstract: The present inventions provide a capacitive transducer that can reduce film damage on a substrate surface on a vibration film side due to a difference in thermal expansion coefficient between a through wiring and a substrate and a method of manufacturing the same. The capacitive transducer consists of a plurality of cells with each cell comprising a first electrode and a vibration film on a first surface side of a substrate having a through wiring that penetrates the substrate from a first surface to a second surface of the substrate, the vibration film including a second electrode that is formed with a gap from the first electrode. A holding member that holds a leading end of the through wiring is provided on the first surface side of the substrate.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: July 10, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shinan Wang, Shinichiro Watanabe
  • Patent number: 9899115
    Abstract: Disclosed is a terahertz trapping device including a substrate, and a film disposed on the substrate, wherein the film has a slot in a particular shape patterned to be engraved or a structure in a particular shape patterned by embossing the film to control motion of a particle using terahertz electromagnetic waves.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: February 20, 2018
    Assignee: Korea Institute of Science and Technology
    Inventors: Min Ah Seo, Dong Kyu Lee, Geun Chang Choi, Chul Ki Kim, Jae Hun Kim, Taik Jin Lee, Young Min Jhon
  • Patent number: 9880047
    Abstract: Methods for determining separate velocity components of an acoustic wavefield that are incident on a distributed fiber optic sensor are disclosed. A fiber optic sensor includes fiber that is spatially distributed in non-parallel planes of a three-dimensional volume having three orthogonal axes. The fiber includes a first fiber pattern that is spatially distributed within a first plane of the three-dimensional volume, and a second fiber pattern that is spatially distributed within a second plane of the volume. The fiber patterns are interrogated separately by a distributed fiber optic interrogation system. The individual responses from each pattern are combined and processed to determine separate velocity components of the acoustic wavefield relative to the orthogonal axes of the three-dimensional volume.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: January 30, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: James Martin, Daniela Donno, Bence Papp, Arthur Hartog
  • Patent number: 9821674
    Abstract: The invention relates to a method, to a device, and to a system for determining a position of a vehicle. The method comprises the method steps: Measuring (S01) at least one first magnetic field strength of a magnetic field at one each first position (A-i) by means of a first magnetic field sensor (11) arranged on a vehicle (1); measuring (S02) at least one second magnetic field strength of the magnetic field at one each second position (B-i) by means of a second magnetic field sensor (12) arranged on the vehicle (1) at a distance from the first magnetic field sensor (11); determining (S03) position data of the vehicle (1) at least by comparing data, which are based on the measured first and second magnetic field strengths, to a predetermined magnetic field data of the magnetic field; and outputting (S04) a signal based on said position data.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: November 21, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Michael Bildstein, Bernd Eckert
  • Patent number: 9803664
    Abstract: A system for measuring the position of a rod element as, for example, a hydraulically or pneumatically operated piston rod. Unlike the prior art, the system according to the present invention employs a measuring principle that does not require preparatory treatment of the rod element as is required in the known solutions. The system employs direct time of flight measurements with the aid of acoustic surface waves that are introduced into the rod element. The instrument is retrofittable on existing cylinders without any modification/reconstruction thereof. An EMAT principle is employed to introduce the surface waves into the measurement in a non-contact manner.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: October 31, 2017
    Assignee: TECHNI AS
    Inventors: David Christian Petersen, Jan Martin Bendiksen, Petter F. Schmedling, Morten Roll Karlsen, Roland Eisenträger, Audun G. Kolle
  • Patent number: 9625423
    Abstract: A method and apparatus for testing a composite structure. A pulsed laser beam having a number of properties is generated. Each of the number of properties is within a selected range. The pulsed laser beam generated by the generation laser system is directed towards a composite structure comprised of a number of composite materials. A number of ultrasonic waves are formed in the composite structure when the pulsed laser beam contacts the composite structure without causing any undesired inconsistencies in the composite structure outside of selected tolerances.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: April 18, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Richard H. Bossi, Gary Ernest Georgeson, Jeffrey Reyner Kollgaard, Alan Frank Stewart, William P. Motzer, Clarence Lavere Gordon, III, Matthew O'Donnell, Jinjun Xia, Ivan Pelivanov, Chen-wei Wei
  • Patent number: 9617847
    Abstract: An illustrative distributed sensing system includes a fiberoptic cable, a transmitter module, and a receiver module. The transmitter module is coupled to the fiberoptic cable to communicate light in each of multiple independent paths to each of multiple positions along the cable, The receiver module is coupled to the fiberoptic cable to receive backscattered light from said multiple positions along the cable via the multiple independent paths. The receiver module includes at least one receiver for each of said multiple independent paths to obtain simultaneous measurements for each of said multiple positions. The multiple independent paths may be provided by wave division multiplexing, frequency division multiplexing, spatial mode division multiplexing, multicore fiber, and/or multiple fibers.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: April 11, 2017
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Kari-Mikko Jaaskelainen, Henry C. Bland, Benjamin M. Banack, David A. Barfoot
  • Patent number: 9562807
    Abstract: A system may monitor a vibration isolating connection between a first part and a second part. The system may include a light source, an optical sensor mounted to receive light from the light source, and a processing unit for providing an output indicative of the deformation of the vibration isolating connection based on the output of the optical sensor.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: February 7, 2017
    Assignee: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED
    Inventor: Stuart Gillies
  • Patent number: 9562863
    Abstract: A layer direction determining method for a multilayer electronic component to accurately determine the layer direction of conductor layers in the multilayer electronic component.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: February 7, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kouki Okamura
  • Patent number: 9508960
    Abstract: The present application provides a method for packaging a display device and an apparatus therefor. The method includes: providing a display device, a platform, a laser beam and a magnetic mechanism; wherein the display device includes a light emitting element, the light emitting element includes at least one effective light emitting region thereon and is prepared on an upper surface of a glass substrate, the glass substrate is bonded to a glass cover plate via a sealing adhesive layer; the display device is placed on the platform; the laser beam penetrates the glass cover plate and focuses on the sealing adhesive layer to sinter the sealing adhesive layer; and the magnetic mechanism clamps the glass cover plate and the glass substrate from top to bottom and applies a uniform pressing force on the effective light emitting region of the display device.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: November 29, 2016
    Assignee: EverDisplay Optronics (Shanghai) Limited
    Inventor: Baowei Su
  • Patent number: 9383342
    Abstract: A method and apparatus for inspecting a test object with a non-planar feature. A pattern of light is transmitted from a first array of optical fibers associated with a sensor structure onto a surface of the test object at a location of the non-planar feature. The pattern of light is configured to cause sound waves in the test object when the pattern of light encounters the test object. A response to the sound waves is detected using a second array of optical fibers associated with the sensor structure. A determination is made as to whether an inconsistency is present in the test object at the location of the non-planar feature from the response to the sound waves detected using the second array of optical fibers.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: July 5, 2016
    Assignee: THE BOEING COMPANY
    Inventors: Richard H. Bossi, Gary E. Georgeson, Clarence L. Gordon, III, Jeffrey R. Kollgaard, William P. Motzer, Alan Frank Stewart
  • Patent number: 9201045
    Abstract: Systems, devices, and methods of inspecting a body of a tubular, are provided. An exemplary electro-magnetic acoustic transducers (EMAT) tubular inspection system for inspecting a body of a tubular includes an EMAT in-line tubular inspection device. The device can include a spine having a longitudinal support body and radially projecting rails, and multiple telescoping sections each connected to the radially projecting rails. The telescoping sections can include a magnetic back panel, one or more wheels positioned to engage an inner surface of a body of a tubular during inspection, and signal propagating and receiving modules carried by the magnetic back panel. Each module can include a magnet and different types of EMAT inspection transducer coil arrangements connected to the magnet. The different types of EMAT inspection transducer coil arrangements provide for the generation of NBSH, SW, and SV waves.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: December 1, 2015
    Assignee: ItRobotics, Inc.
    Inventors: Anouar Jamoussi, Zhiyong Wang, Bruce Maxfield
  • Patent number: 9168049
    Abstract: Electro-impulse intracorporeal lithotripsy comprises bringing electrodes of a probe in immediate electrical contact with the calculus and supplying to the electrodes of very short high voltage impulses capable to ignite electrical spark discharge and establish a discharge channel within the bulk of the calculus. The channel goes through the calculus and creates tensile stresses, destroying the calculus.
    Type: Grant
    Filed: July 18, 2006
    Date of Patent: October 27, 2015
    Inventors: Vladimir Chemenko, Valery Diamant, Marat Lerner, Stepan Khachin, Vladimir Khachin
  • Patent number: 9164066
    Abstract: A method and apparatus comprises a sensor structure, a first array of optical fibers, and a second array of optical fibers. The first array of optical fibers is associated with the sensor structure. The first array of optical fibers is configured to transmit a pattern of light towards a test object and the pattern of light is configured to cause sound waves in the test object when the pattern of light encounters the test object. The second array of optical fibers is associated with the sensor structure. The second array of optical fibers is configured to detect a response to the sound waves.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: October 20, 2015
    Assignee: THE BOEING COMPANY
    Inventors: Richard H. Bossi, Gary E. Georgeson, Clarence L. Gordon, III, Jeffrey R. Kollgaard, William P. Motzer, Alan Frank Stewart
  • Publication number: 20150143911
    Abstract: [Problems to be solved] A physical/chemical sensor that enables reduction of the size of the sensor and formation of arrays of the sensors is provided. The sensor can sense small change of surface stress and can measure mass of fixed specific substance. Also, a measuring method of the specific substance using the sensor is provided. [Means for solving problems] A physical/chemical sensor has a movable membrane (3) having a diaphragm structure provided to form a hollow section (2) between the movable membrane (3) and a light receiving surface of a light receiving element (1), a first piezoelectric membrane (4) that is provided on a front-side surface or a backside surface of the movable membrane (3) and that excites the movable membrane (3), and a second piezoelectric membrane (5) that is provided on the front-side surface or the backside surface of the movable membrane (3) and that senses a voltage caused by oscillation of the movable membrane (3).
    Type: Application
    Filed: November 20, 2014
    Publication date: May 28, 2015
    Applicants: STANLEY ELECTRIC CO., LTD., National University Corporation
    Inventors: Kazuhiro TAKAHASHI, Chiharu SASAKI, Masanao TANI, Takaaki KOYAMA
  • Patent number: 9038474
    Abstract: The present invention employs a photoacoustic measuring apparatus including: a laser light source; a forming unit for forming a second light beam by dividing or deforming a laser light beam; an optical member for guiding the second light beam to the surface of a subject; a probe for obtaining a photoacoustic wave generated when the subject is irradiated with the second light beam; and a buffering member that contacts the surface of the subject and transmits light, wherein the optical member overlaps areas of the second light beam having a small light intensity on the surface of the subject, the probe and the optical member are positioned on an identical side of the buffering member relative to the subject, and the optical member refracts the second light beam such that the second light beam enters the subject through the buffering member while avoiding the probe.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: May 26, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shigeru Ichihara, Shuichi Kobayashi
  • Publication number: 20150135839
    Abstract: A photoacoustic probe module includes an optical system configured to guide a laser beam generated by a laser source such that the laser beam arrives at an object at a target incidence angle and penetrates the object to a target internal depth, and a photoacoustic probe configured to receive acoustic waves emitted from the target depth by the laser beam.
    Type: Application
    Filed: November 21, 2014
    Publication date: May 21, 2015
    Applicants: SAMSUNG ELECTRONICS CO., LTD., SAMSUNG MEDISON CO., LTD.
    Inventors: Jae Kwang LEE, Jung Ho KIM, Jung Taek OH
  • Publication number: 20150122032
    Abstract: Provided are a photoacoustic apparatus and method of operating the same. The photoacoustic apparatus includes: a laser module that generates laser light and transmits a laser state signal indicating a state of a laser module; a probe including an optical output unit for irradiating laser light generated by the laser module onto an object and a scanner for detecting a photoacoustic signal that is generated from the object; a scanner controller for controlling a position of the scanner; a sequence controller for controlling acquisition of the photoacoustic signal based on the laser state signal; a signal receiver that is controlled by the sequence controller to acquire the photoacoustic signal; and a photoacoustic image generator for generating a photoacoustic image based on the photoacoustic signal. The laser state signal includes a lasing ready state signal and a laser exposure state signal.
    Type: Application
    Filed: September 18, 2014
    Publication date: May 7, 2015
    Inventors: Jong-kyu JUNG, Dal-kwon KOH, Jung-ho KIM, Jung-taek OH, Jae-kwang LEE
  • Publication number: 20150122033
    Abstract: An optical fiber for generating a Bessel beam and an optical imaging device using the same are disclosed. The optical fiber for generating a Bessel beam includes a single mode optical fiber (SMF) unit, a multi-mode optical fiber unit, and a lens unit. The SMF unit includes a core and a cladding surrounding the core. The multi-mode optical fiber unit comes in contact with a first end of the SMF unit. The lens unit comes in contact with one end of the multi-mode optical fiber unit that faces the first end of the SMF unit.
    Type: Application
    Filed: October 1, 2014
    Publication date: May 7, 2015
    Inventors: Chulhong Kim, Kyung Hwan Oh, Sung Jo Park, Jong Ki Kim, Sung Rae Lee, Man sik Jeon, Chang Ho Lee
  • Publication number: 20150101411
    Abstract: A system is provided for component separation. In an embodiment, a light source or other source of electromagnetic energy delivers energy to a volume of tissue. A transducer array or other sensor receives a resulting acoustic signal, and a processing subsystem processes the acoustic signal to separate a direct acoustic return component from a secondary acoustic return component of the acoustic signal. An output and/or storage device presents and/or stores information about the direct acoustic return component, the secondary acoustic return component, or both. Other embodiments include a coded probe, a probe having an isolator that produces a wavefront, a sensor for measuring intensity of an acoustic wave produced by absorbed photons, and a system that receives acoustic signals from surface targets to determine an optical parameter of the volume.
    Type: Application
    Filed: October 13, 2014
    Publication date: April 16, 2015
    Applicant: SENO MEDICAL INSTRUMENTS, INC.
    Inventors: Jason Zalev, Bryan Clingman, Donald G. Herzog
  • Patent number: 9003888
    Abstract: A method for obtaining seismic information about a subsurface formation using at least one fiber optic cable having its proximal end coupled to a light source and a photodetector comprises: transmitting into the cable at least one light pulse; receiving at the photodetector a first and second light signals indicative of the physical status of at least one first cable section and at least one second cable section, respectively, wherein the first and second sections are selected so as to provide first and second information items, respectively; optionally, further processing at least one of the first and second information items so as to produce derivative information; and outputting at least one of the first, second, and derivative information items to a display; wherein the second item differs from the first item in at least one aspect selected from the group consisting of: resolution, area, and location.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: April 14, 2015
    Assignee: Shell Oil Company
    Inventors: Jorge Louis Lopez, Peter Berkeley Wills, Jeffery Joseph Mestayer
  • Publication number: 20150090037
    Abstract: An object information acquiring apparatus is used, including: an optical transmission system for transmitting light from a light source; a photoacoustic probe including an irradiating end for irradiating an object with light and a receiver for receiving acoustic waves generated from the object that has been irradiated with light; a processor for acquiring information on the object based on the acoustic waves; a light quantity meter for measuring the quantity of light emitted from the irradiating end; a memory for storing a measurement value; and a presentation unit. The processor compares the measurement value with a reference value of light quantity or a history of measurement value stored in the memory, and provides a result regarding whether or not the measurement value is within a reference range to the presentation unit.
    Type: Application
    Filed: September 10, 2014
    Publication date: April 2, 2015
    Inventors: Toshinobu Tokita, Masato Yajima
  • Patent number: 8978478
    Abstract: A laser beam having a single wavelength emitted from a laser light source is converted at a wavelength shifter into a laser beam having at least two wavelengths, which is further demultiplexed at a beam splitter into a laser beam having a first wavelength and a laser beam having a second wavelength. The output power and pulse width of the laser beam having the first wavelength are adjusted by a first controller so as to reach levels appropriate for generating ultrasonic vibrations without causing damage to an inspection object. The output power and pulse width of the laser beam having the second wavelength are adjusted by a second controller so as to reach appropriate levels for detecting the above-described ultrasonic vibrations. These laser beams are multiplexed by a multiplexer into a single laser beam to be focused onto a surface of the inspection object.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: March 17, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Masahito Ishioka
  • Patent number: 8973444
    Abstract: Methods and apparatus for tracking objects in conduits, especially for tracking the movement of a pig in a pipeline, are disclosed. Distributed acoustic sensing is used to obtain signal returns from a plurality of discrete longitudinal sensing portions of a fibre optic cable which is laid along the length of the conduit. The method involves detecting an acoustic signature corresponding to the object moving in the conduit. The acoustic signature may comprise a series of pressure pulses caused by the object traversing joints etc. in the conduit. Preferably the method involves detecting pressure waves caused by the object as it moves through the conduit. Detecting the characteristic pressure wave signal provides discrimination of the object from other acoustic disturbances. In pipeline applications a pig can be tracked in real time, if the pig stops moving an alert can be generated and the location of the pig will be known.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: March 10, 2015
    Assignee: Optasense Holdings Ltd.
    Inventors: David John Hill, Magnus McEwen-King
  • 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: 20150045778
    Abstract: An object information acquiring apparatus is used which includes a laser medium that oscillates laser light, an excitation source that excites the laser medium, a voltage accumulator that applies a voltage to the excitation source, a voltage supplier that supplies a voltage to the voltage accumulator, a voltage controller that limits a maximum supplied voltage from the voltage supplier, a receiver that receives a photoacoustic wave generated by an object irradiated with the laser light, and a constructor that acquires characteristic information relating to the object in use of the photoacoustic wave, wherein the voltage controller compares a measured voltage value obtained by implementing division of a supplied voltage from the voltage supplier with a reference voltage value defining the maximum supplied voltage.
    Type: Application
    Filed: July 25, 2014
    Publication date: February 12, 2015
    Inventor: Shigeru Ichihara
  • Publication number: 20150000412
    Abstract: An object information acquiring apparatus is used, which includes: an irradiation unit for irradiating an object with a laser beam; a restriction unit for restricting an output of the laser beam from the irradiation unit; a control unit for controlling an irradiation of the laser beam and an activation of the restriction unit; a probe for receiving acoustic waves that are generated from the object irradiated with the laser beam; and a construction unit for generating characteristic information relating to the object in use of the acoustic waves, wherein the control unit performs irradiation control of not irradiating the laser beam when the restriction unit is being activated.
    Type: Application
    Filed: June 17, 2014
    Publication date: January 1, 2015
    Inventors: Tadaki Watanabe, Daisuke Nagao
  • Publication number: 20150000411
    Abstract: Used is an object information acquiring apparatus including an irradiation unit for irradiating an object with a laser beam, a wavelength switching unit for selecting a wavelength of the laser beam, a restriction unit for restricting an output value of the laser beam, a probe for receiving acoustic waves that are generated from the object irradiated with the laser beam, and a configuration unit for generating characteristic information relating to the object in use of the acoustic waves, wherein the restriction unit restricts the output value according to the wavelength selected by the wavelength switching unit.
    Type: Application
    Filed: June 17, 2014
    Publication date: January 1, 2015
    Inventors: Tadaki Watanabe, Daisuke Nagao
  • Publication number: 20140366634
    Abstract: A pipe damage detection apparatus and method are disclosed. The pipe damage detection apparatus includes an ultrasonic supply unit configured to supply an ultrasonic signal to a pipe; an ultrasonic reception unit configured to receive the ultrasonic signal of the pipe; and an analysis unit configured to analyze the ultrasonic signal received by the ultrasonic reception unit, and determine whether the pipe is damaged. The pipe damage detection apparatus and method can detect whether a pipe that is difficult for an inspector to access because it is coated with an insulating material or buried in the ground is damaged.
    Type: Application
    Filed: January 20, 2012
    Publication date: December 18, 2014
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Hoon Sohn, Hyeon Seok Lee, Jin Yeol Yang
  • Publication number: 20140360273
    Abstract: Certain examples provide a transparent ultrasonic transducer including a transparent substrate and a transparent optical resonator positioned on the transparent substrate. The transparent optical resonator is to facilitate excitation of a biological sample and to receive acoustic emission from the biological sample triggered by the excitation, for example. Certain examples provide a ring resonator ultrasonic detector including a microscope cover slide. The microscope cover sheet includes a substrate and a ring optical resonator positioned on the substrate. The example ring optical resonator is to facilitate illumination of a biological sample and to receive acoustic emission from the biological sample in response to the illumination.
    Type: Application
    Filed: June 9, 2014
    Publication date: December 11, 2014
    Inventors: Hao F. Zhang, Cheng Sun
  • Publication number: 20140360272
    Abstract: Provided is a capacitive transducer drive device capable of adjusting a potential difference applied between electrodes of a cell with a simple configuration. A capacitive transducer to be driven by the drive device includes a cell including: a first electrode included in a vibrating membrane; and a second electrode formed to oppose the first electrode through intermediation of a gap. One of the first electrode and the second electrode of the cell is electrically connected to a first DC voltage applying unit, and the other of the first electrode and the second electrode of the cell is electrically connected to a second DC voltage applying unit. A voltage to be applied by the second DC voltage applying unit is set to be lower than a voltage to be applied by the first DC voltage applying unit. The voltage to be applied by the second DC voltage applying unit is variable.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 11, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Atsushi Kandori
  • Patent number: 8904871
    Abstract: The present disclosure relates to methods and systems relating to temperature dependent photoacoustic imaging are provided. In such methods and systems, a tissue sample may be exposed to thermal energy and electromagnetic radiation to generate an acoustic signal, which may be detected. The amplitude of the acoustic signal may be determined and correlated with a tissue property, such as the presence or absence of macrophages or foam cells.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: December 9, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventors: Stanislav Emelianov, Bo Wang, Jignesh Shah, Konstantin Sokolov, Jimmy Su, Yun-Sheng Chen, Wolfgang Frey
  • Publication number: 20140356132
    Abstract: The invention relates to a device for measuring vibration amplitudes of the blade tips in a turbomachine, comprising a support mounted in an orifice of a casing of a turbomachine and wherein are housed two optical guides for the emission and reception of a light signal exiting inside the casing across from the tips of the blades of a turbine wheel. Each optical guide comprises an optical fibre connected by a mechanical connector to a needle of which the core is made of a material able to transmit a light signal and which is resistant to temperatures less than or equal to 1100° C. and which exits at its distal end in the casing across from the blade tips.
    Type: Application
    Filed: May 7, 2013
    Publication date: December 4, 2014
    Applicant: SNECMA
    Inventor: SNECMA
  • Patent number: 8887572
    Abstract: A system and methods with which changes in microstructure properties such as grain size, grain elongation, texture, and porosity of materials can be determined and monitored over time to assess conditions such as stress and defects. An example system includes a number of ultrasonic transducers configured to transmit ultrasonic waves towards a target region on a specimen, a voltage source configured to excite the first and second ultrasonic transducers, and a processor configured to determine one or more properties of the specimen.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: November 18, 2014
    Assignee: Board of Regents of the University of Nebraska
    Inventor: Joseph A. Turner
  • Publication number: 20140290370
    Abstract: An optical microresonator based RF oscillator sensor for measuring mass, temperature, and particle/molecule concentration. An optical energy source is coupled to the optical microresonator to generate optical power oscillations at Rf frequencies. A stable or reference RF oscillation frequency is established which allows for measuring oscillation frequency variations induced by the interaction of the substance with the optical microresonator.
    Type: Application
    Filed: March 14, 2014
    Publication date: October 2, 2014
    Inventor: Mani Hossein-Zadeh
  • Patent number: 8813571
    Abstract: There is provided an optical microphone for detecting an acoustic wave propagating in an ambient fluid, the optical microphone including: a propagation medium section; a light source for emitting a light wave to be transmitted through a diffraction region in the propagation medium section; and a photoelectric conversion section for detecting the light wave having been transmitted through the propagation medium section. A first acoustic wave which is a portion of the acoustic wave and a second acoustic wave which is another portion thereof are allowed to propagate in the propagation medium section so as to simultaneously arrive at the diffraction region, and an interference component between a +1st order diffracted light wave and a ?1st order diffracted light wave of the light wave generated based on a refractive index distribution of the propagation medium occurring in the diffraction region.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: August 26, 2014
    Assignee: Panasonic Corporation
    Inventors: Takuya Iwamoto, Masahiko Hashimoto, Ushio Sangawa, Yuriko Kaneko
  • Patent number: 8806949
    Abstract: An electromagnetic ultrasound transducer is disclosed for receiving linearly polarized horizontal shear waves from an electrically conductive workpiece including a magnetizing unit, which provides a side facing the workpiece, along which a number n of permanent magnets are attached in at least two rows arranged next to one another in such a manner that the magnetic polarities of the magnetic poles which face the side alternate along a row periodically with a period length which corresponds to a trace wavelength ?s and a HF coil arrangement with conductor sections in at least two rows running parallel to one another, through which current can pass in mutually opposite directions.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: August 19, 2014
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventor: Frank Niese
  • Patent number: 8806950
    Abstract: A method and apparatus for an electromagnetic acoustic transducer. An apparatus comprises a conductive material and a current inducer. The conductive material is configured to generate a magnetic field, wherein the magnetic field has magnetic flux lines that are substantially fixed and the conductive material has a temperature that is equal to or less than a critical temperature at which the conductive material has substantially zero electrical resistance. The current inducer is configured to cause an electric current to flow in a test object that interacts with the magnetic field, wherein the electric current has a frequency that generates an acoustic wave in the test object.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: August 19, 2014
    Assignee: The Boeing Company
    Inventors: John Ralph Hull, Michael Strasik, Richard H. Bossi
  • Patent number: 8789422
    Abstract: An electromagnetic-acoustic transducer for ultrasonic testing of test objects which are composed substantially of an electrically conductive material includes a magnet system that produces a magnetic field intended to penetrate into the test object, and an inductive coil arrangement that produces an electromagnetic alternating field superimposed on this magnetic field in the test object, and that detects electromagnetic alternating fields emitted from the test object, wherein magnet system is arranged in a magnetization unit, the coil arrangement is arranged in a probe unit separate from the magnetization unit, the probe unit is mounted such that it can move relative to the magnetization unit in the area of the magnetic field.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: July 29, 2014
    Assignee: Institut Dr. Foerster GmbH & Co. KG
    Inventors: Michael Ege, Jürgen Wanner
  • Patent number: 8770031
    Abstract: A method and apparatus for non-destructive testing. An embodiment of the present disclosure provides a non-destructive inspection system comprising a capacitive acoustic transducer and a control unit connected to the capacitive transducer.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: July 8, 2014
    Assignee: The Boeing Company
    Inventor: Steven Kenneth Brady