Vibration Velocity (e.g., Echo Timing) Patents (Class 374/119)
  • Patent number: 10804821
    Abstract: An apparatus and a method for monitoring the relative relationship between the wafer and the chuck is provided, especially for monitoring whether the wafer is sticky on the chuck when the wafer is de-chucked. The lift pins may be extended outside the chuck to separate the wafer and the chuck when the wafer is de-chucked. By detecting the capacitance between the de-chucked wafer and the chuck, especially by comparing the detected capacitance with the capacitance that the wafer is held by the chuck, one may determine whether the wafer is sticky on the chuck, or even whether the wafer is properly supported by the lift pins. Accordingly, an early alarm may be issued if the wafer is sticky or improperly removed. Besides, by controlling a switch electrically connected to a lift pin that contacted the wafer, the charges at the wafer may be eliminated.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: October 13, 2020
    Assignee: ADVANCED ION BEAM TECHNOLOGY, INC.
    Inventors: Te-Min Wang, Yu-Ho Ni, Chun-Chieh Lin, Chien-Chung Hou, Cheng-Mao Chien
  • Patent number: 10585018
    Abstract: A method and system are provided with which it is possible to detect non-firing and untimely firing events in internal combustion and, if necessary, the temperature of the gas in the exhaust gas pipe. This is performed in general by measuring the speed of sound and determining the phase angle between the sender and receiver either arranged on different sides of the exhaust gas pipe or on the same side of the exhaust gas pipe. The receiver, depending on the measurement principle, can include one, two, or in special applications three receivers. Additionally, if necessary, it is possible to suppress the structure-borne sound influence on a speed of sound measurement with low cost and high stability.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: March 10, 2020
    Assignee: RÜEGER S.A.
    Inventor: Bert Willing
  • Patent number: 10551375
    Abstract: A biosensor includes a detection element having an analyte detecting portion which is monotonically increased in mass in response to detection of an analyte; a reference element having a reference measuring portion which exhibits no reactivity to the analyte; a mixer which mixes a detection signal responsive to mass variations in the analyte detecting portion from the detection element and a reference signal from the reference element; a measurement portion which calculates two candidate phase-change values of a positive value and a negative value, from a signal mixed by the mixer in accordance with a heterodyne system, and determines a phase-change value from the two candidate phase change value by judging whether the phase is positive or negative based on temporal changes in signal strength; and a detection amount calculation portion which calculates a detection amount of the analyte based on the phase change value determined by the measurement portion.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: February 4, 2020
    Assignee: KYOCERA CORPORATION
    Inventor: Hiroshi Katta
  • Patent number: 10514459
    Abstract: Provided herewith is a thermometer that calculates an average temperature between a starting point and a target surface. Also provided is a method of calculating an average temperature in an open space, between a starting point and a target surface. In additional embodiments, a method of calculating a two dimensional average temperature gradient in an open space is provided. Further provided is a method of calculating a three dimensional average temperature gradient in an open space.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: December 24, 2019
    Inventor: Robert Thomas Brent Cunningham
  • Patent number: 10478937
    Abstract: A chemical mechanical polishing apparatus includes a platen to support a polishing pad, and an in-situ acoustic emission monitoring system including an acoustic emission sensor supported by the platen, a waveguide configured to extending through at least a portion of the polishing pad, and a processor to receive a signal from the acoustic emission sensor. The in-situ acoustic emission monitoring system is configured to detect acoustic events caused by deformation of the substrate and transmitted through the waveguide, and the processor is configured to determine a polishing endpoint based on the signal.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: November 19, 2019
    Assignee: Applied Materials, Inc.
    Inventors: Jianshe Tang, David Masayuki Ishikawa, Benjamin Cherian, Jeonghoon Oh, Thomas H. Osterheld
  • Patent number: 10390704
    Abstract: Systems and methods for measuring phase dynamics and other properties (e.g. intracranial pressure) are disclosed. For example, the system may generate a reference waveform and a measurement waveform using digital synthesizers, each waveform having an identical constant frequency but also a relative phase shift. Next, system may send a tone-burst, via a transducer, into a sample (e.g. a skull or a bonded material), and then receive a reflected tone-burst in response. Then, a phase difference between the received tone-burst and the measurement waveform may be determined with a linear phase detector. Next, the phase shift of the measurement waveform may be adjusted, by the determined phase difference, such that there is no longer any phase difference between the received tone-burst and the adjusted measurement waveform generated by the appropriate digital synthesizer. A similar adjustment may occur after subsequent tone-bursts, allowing accurate monitoring of continuously variable phase relationships.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: August 27, 2019
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: William T. Yost, John H. Cantrell, Daniel F. Perey
  • Patent number: 10365166
    Abstract: An environmental parameter sensor for a mobile device is described comprising a first acoustic transducer; a second acoustic transducer arranged at a predetermined distance from the first acoustic transducer; a controller coupled to the first acoustic transducer and the second acoustic transducer; wherein the controller is configured to determine at least one of a time-of-flight value and an attenuation value of an acoustic signal between the first acoustic transducer and the second acoustic transducer and to determine at least one environmental parameter from the at least one of the time-of-flight value and the attenuation value The environmental parameter sensor may determine environmental parameters such as temperature, wind speed, and humidity from acoustic measurements.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: July 30, 2019
    Assignee: NXP B.V.
    Inventors: Kim Phan Le, Jozef Thomas Martinus van Beek, Niels Klemans
  • Patent number: 9846088
    Abstract: Disclosed is a method and apparatus for measuring semiconductor substrate temperature using a differential acoustic time of flight measurement technique. The measurement is based on measuring the time of flight of acoustic (ultrasonic) waves across the substrate, and calculating a substrate temperature from the measured time of flight and the known temperature dependence of the speed of sound for the substrate material. The differential acoustic time of flight method eliminates most sources of interference and error, for example due to varying coupling between an ultrasonic transducer and the substrate. To further increase the accuracy of the differential acoustic time of flight measurement, a correlation waveform processing algorithm is utilized to obtain a differential acoustic time of flight measurement from two measured ultrasonic waveforms. To facilitate signal recognition and processing, a symmetric Lamb mode may be used as mode of excitation of the substrate.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: December 19, 2017
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Jun Pei, Junwei Bao, Holger Tuitje, Ching-Ling Meng, Mihail D. Mihaylov
  • Patent number: 9810160
    Abstract: The disclosure relates to a method for determining a temperature in a pressurized flow path of a gas turbine comprising the steps of sending an acoustic signal from an acoustic signal emitting transducer across a section of the pressurized flow path, detecting the acoustic signal with a receiving transducer, measuring the time needed by the acoustic signal to travel from the acoustic signal emitting transducer to the receiving transducer, calculating the speed of sound, and calculating the temperature as a function of the speed of sound, the heat capacity ratio (?) and a specific gas constant (Rspec) of the gas flowing in the pressurized flow path. Besides the method, a gas turbine with a processor and transducers arranged to carry out such a method is disclosed.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: November 7, 2017
    Assignee: ANSALDO ENERGIA SWITZERLAND AG
    Inventors: Wolfgang Lang, Jürgen Hoffmann
  • Patent number: 9622004
    Abstract: Provided a sound velocity correction device including an environmental parameter obtainer that acquires a measured value of a surrounding environmental parameter of a sound collector that collects a sound emitted from a sound source; and a sound velocity corrector that corrects a sound velocity of the sound which is used to form directivity in a directing direction toward the sound source from the sound collector, using the measured value of the surrounding environmental parameter of the sound collector which is acquired by the environmental parameter obtainer.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: April 11, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hiroyuki Matsumoto, Shuichi Watanabe, Hisashi Tsuji, Akitoshi Izumi, Hirotaka Sawa
  • Patent number: 9581568
    Abstract: The present invention relates to system for measuring pressure and temperature based on change in the characteristic properties of a medium for ultrasound under the effect of pressure and temperature. The invention is based on two waveguides where geometry is adapted to the medium's characteristic properties for ultrasound such that only planar pressure waves are generated in the waveguides. The first of the waveguides is arranged for measuring temperature due to thermal expansion of the medium, where the medium is pressure-compensated by means of an internal compensator to prevent thermal pressure accumulation, and where measuring temperature is based on the medium's specific known characteristic data for ultrasound under the effect of temperature under constant pressure.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: February 28, 2017
    Assignee: Techni AS
    Inventors: Harald Borgen, David Christian Petersen, Petter F. Schmedling, Marius Bornstein, Trond Sjulstad, Morten Roll Karlsen, Andreas Bjerknes Taranrød, Jan Martin Bendiksen, Tor Helge Brandsæter
  • Patent number: 9500430
    Abstract: The invention is a. firearm (1) comprising a verification device (10) suitable for verifying and detecting an anomaly of the state of the barrel (2), such as the presence of partial or total occlusions or variations of cross-section. The device (10) comprises receiver means (200), on the firearm (1), suitable for detecting a detected signal (R) derivable from an emitted signal (E), influenced by said anomaly.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: November 22, 2016
    Assignee: FABBRICA D'ARMI PIETRO BERETTA S.p.A.
    Inventors: Eugenio Righi, Simone Dalola, Vittorio Ferrari
  • Patent number: 9422806
    Abstract: A system, method and apparatus for controlling a downhole operation is disclosed. A tool is operated to perform the downhole operation at a selected downhole location using a first value of an operation parameter of the tool. A magnetostrictive probe is used to determine a temperature profile along a section of a wellbore related to the operation being performed using the first value of the operation parameter. At least one temperature of the temperature profile is compared to a selected threshold. The operation parameter is altered to a second value based on the comparison of the temperature profile to the selected threshold.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: August 23, 2016
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Ke Wang, Zhiyue Xu, Carlos A. Prieto
  • Patent number: 9343055
    Abstract: A fluid flow system, device, and method for locating a fluid layer in a fluid flow using an acoustic waveguide. The acoustic waveguide comprises a waveguide base segment, and a waveguide reflector segment. The waveguide reflector segment comprises a plurality of disc shaped waveguide reflectors along its length for locating a fluid layer.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: May 17, 2016
    Assignee: General Electric Company
    Inventors: Xiaolei Shirley Ao, Shawn Li Doria, Jin Chang Xu, Reuben Micah Aronson
  • Patent number: 9212956
    Abstract: An ultrasonic thermometer for measuring a temperature profile along a measurement axis of a structure, comprising a continuous measurement pathway of a structure (310) having a longitudinal measurement axis and proximal (202) and distal ends (204), and at least two backscatterers (332) formed therein transverse to the longitudinal axis and separated by a predetermined separation distance.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: December 15, 2015
    Assignee: University of Utah Research Foundation
    Inventors: Mikhail Skliar, Kevin Whitty, Anthony Butterfield
  • Publication number: 20150078416
    Abstract: Disclosed is a method and apparatus for measuring semiconductor substrate temperature using a differential acoustic time of flight measurement technique. The measurement is based on measuring the time of flight of acoustic (ultrasonic) waves across the substrate, and calculating a substrate temperature from the measured time of flight and the known temperature dependence of the speed of sound for the substrate material. The differential acoustic time of flight method eliminates most sources of interference and error, for example due to varying coupling between an ultrasonic transducer and the substrate. To further increase the accuracy of the differential acoustic time of flight measurement, a correlation waveform processing algorithm is utilized to obtain a differential acoustic time of flight measurement from two measured ultrasonic waveforms. To facilitate signal recognition and processing, a symmetric Lamb mode may be used as mode of excitation of the substrate.
    Type: Application
    Filed: September 18, 2014
    Publication date: March 19, 2015
    Inventors: Jun PEI, Junwei BAO, Holger TUITJE, Ching-Ling MENG, Mihail D. MIHAYLOV
  • Publication number: 20150063411
    Abstract: A method and apparatus for operating a gas turbine engine including determining a temperature of a working gas at a predetermined axial location within the engine. An acoustic signal is encoded with a distinct signature defined by a set of predetermined frequencies transmitted as a non-broadband signal. Acoustic signals are transmitted from an acoustic transmitter located at a predetermined axial location along the flow path of the gas turbine engine. A received signal is compared to one or more transmitted signals to identify a similarity of the received signal to a transmitted signal to identify a transmission time for the received signal. A time-of-flight is determined for the signal and the time-of-flight for the signal is processed to determine a temperature in a region of the predetermined axial location.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 5, 2015
    Inventors: Upul P. DeSilva, Heiko Claussen, Michelle Xiaohong Yan, Justinian Rosca, Nancy H. Ulerich
  • Publication number: 20150043612
    Abstract: A method and apparatus for heat quantity measurement, wherein, with an ultrasonic, flow measuring device, which works according to the travel time difference principle, the flow of a fluid of known chemical composition through the lumen of a pipeline is ascertained, and wherein the temperature of the fluid before and after a heat transferer is ascertained, wherein, for a first ascertaining of the temperature of the fluid, the velocity of sound in the fluid is ascertained with the ultrasonic, flow measuring device and a temperature is ascertained outside of the lumen of the pipeline.
    Type: Application
    Filed: October 24, 2012
    Publication date: February 12, 2015
    Inventors: Achim Wiest, Oliver Brumberg, Andreas Berger
  • Patent number: 8801277
    Abstract: An ultrasonic thermometer for measuring a temperature profile along a measurement axis of a solid structure, comprising a continuous measurement pathway of a solid structure (310) having a longitudinal measurement axis and proximal (202) and distal ends (204), and at least two backscatterers (332) formed therein transverse to the longitudinal axis and separated by a predetermined separation distance.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: August 12, 2014
    Assignee: University of Utah Research Foundation
    Inventors: Mikhail Skliar, Kevin Whitty, Anthony Butterfield
  • Patent number: 8646278
    Abstract: A condition measurement apparatus is provided and includes a gas turbine engine combustor having an end cover, a liner defining a liner interior and a fuel nozzle communicative with the liner interior, the end cover being formed to separate a cold side thereof, which is a relatively low temperature environment, from a hot side thereof, which is a relatively high temperature environment in which the liner and the fuel nozzle are disposed, the combustor being formed to define a fuel flow path extending through piping disposed at the cold side of the end cover by which fuel is deliverable to the fuel nozzle, and a condition sensing device operably mounted on the piping.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: February 11, 2014
    Assignee: General Electric Company
    Inventors: Kwanwoo Kim, Geoffrey David Myers, Venkateswarlu Narra, Shiva Kumar Srinivasan
  • Patent number: 8434365
    Abstract: An aerodynamically shaped profile member for aircraft and wind power stations includes, for example, phased-array ultrasonic generator arrangement arranged therein. During operation of the profile member, the ultrasonic generator emits ultrasonic waves in a targeted manner in multiple directions to determine a profile of the thickness of an ice layer on the surface of the aerodynamic profile. The structure may be, for example, a composite fiber material arranged around a foam core, with the ultrasonic generator arrangement being laminated into the composite fiber material. For measurement of the ice thickness, ultrasonic waves are transmitted in a targeted manner to different positions of the surface of the aerodynamic profile, and the ultrasonic waves reflected on the interfaces of the ice layer are detected. At least one region of the surface is scanned by means of the targeted ultrasonic waves, to determine an ice thickness profile.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: May 7, 2013
    Assignee: Airbus Operations GmbH
    Inventors: Rudolf Bilgram, Christian Gradolph, Alois Friedberger, Valentin Kloeppel
  • Patent number: 8434936
    Abstract: A method for performing ultrasonic testing comprising, in one embodiment, the steps of firing an ultrasonic transducer to generate an ultrasonic pulse that passes through a delay line, measuring a delay echo time of flight, and determining the temperature of the delay line using the delay echo time of flight, thereby eliminating the need for additional temperature measuring devices. Other embodiments further comprise the step of using the temperature of the delay line to determine the temperature of a test object, and using the temperature of the test object to determine a thickness of the test object that is compensated for thermal expansion and temperature dependent ultrasonic velocity.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: May 7, 2013
    Assignee: GE Inspection Technologies, LP
    Inventors: John Michael Cuffe, James Barshinger, Ying Fan
  • Publication number: 20130066584
    Abstract: A temperature estimation method including: receiving a scan signal generated by scanning the target region using the ultrasound signal, and estimating, based on the scan signal, an echo shift which is an amount of change in time required for the ultrasound signal to pass through the target region, the time changing depending on the temperature in the target region; estimating, based on the estimated echo shift, a strain which is an apparent change rate of a travel distance required for the ultrasound signal to pass through the target region, the travel distance changing depending on the temperature in the target region; estimating, based on the estimated strain, a strain rate which is a temporal change rate of the strain; and estimating the temperature in the target region corresponding to the strain and the strain rate, based on a predetermined relationship between a strain, a strain rate, and a temperature.
    Type: Application
    Filed: April 3, 2012
    Publication date: March 14, 2013
    Inventors: Li Lan, Shu Feng Fan, Kok Seng Chong, Anh Tuan Tran, Satoshi Kondo
  • Publication number: 20120150413
    Abstract: A method and apparatus for operating a gas turbine engine including determining a temperature of a working gas at a predetermined axial location within the engine. Acoustic signals are transmitted from a plurality of acoustic transmitters and are received at a plurality of acoustic receivers. Each acoustic signal defines a distinct line-of-sound path from one of the acoustic transmitters to an acoustic receiver corresponding to the line-of-sound path. A time-of-flight is determined for each of the signals traveling along the line-of-sound paths, and the time-of-flight for each of the signals is processed to determine a temperature in a region of the predetermined axial location.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 14, 2012
    Inventors: Richard H. Bunce, Upul P. Desilva
  • Patent number: 8192075
    Abstract: Methods of performing ultrasonic testing are disclosed, comprising the step of determining a temperature gradient of an ultrasonic wedge. In one embodiment of the invention, the method further comprises the steps of determining a sound velocity gradient of the ultrasonic wedge to determine the time it takes for sound waves emanating from a plurality of ultrasonic transducer elements attached to the ultrasonic wedge to reach a point of interest within a test object, and firing each of the ultrasonic transducer elements in a timed sequence based on the times such that sound waves from each of the ultrasonic transducer elements reach the point of interest at the same time. In other embodiments of the invention, the total attenuation and acoustic impedance of a sound wave traveling through the ultrasonic wedge is determined to adjust the amplitude of the sound wave such that the sound wave has sufficient amplitude to perform the ultrasonic testing.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: June 5, 2012
    Assignee: GE Inspection Technologies, LP
    Inventor: Anand Desai
  • Patent number: 8182141
    Abstract: In one embodiment, an integrated circuit for providing distributed temperature sensing is disclosed. For example, the integrated circuit comprises a plurality of circuit components, an internal temperature sensing device deployed among the plurality of circuit components; and a plurality of ring-oscillators deployed among the plurality of circuit components, wherein at least one of the plurality of ring-oscillators is deployed adjacent to the internal temperature sensing device, where the plurality of ring-oscillators is used to provide one or more temperature measurements, e.g., a temperature gradient, for the integrated circuit.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: May 22, 2012
    Assignee: Xilinx, Inc.
    Inventors: Anthony J. Collins, Juan J. Noguera Serra
  • Patent number: 8016757
    Abstract: Ultrasound data are collected from a thermal source and a mass of tissue before initiating therapy to measure two parameters of the bio-heat transfer equation (BHTE). The parameters are the thermal diffusivity (K) of the tissue and the magnitude of the thermal source (Q). Once the parameters have been obtained, the BHTE can be calibrated to the specific mass of tissue and the specific thermal source. The calibrated BHTE can be used to generate a temperature dependence curve calibrated to the thermal source and tissue, and spatio-temporal temperature maps, to facilitate pre-therapy planning. During therapy, ultrasound data are collected to determine if Q changes during therapy, and if so, the BHTE is recalibrated using the new Q value, increasing an accuracy of the temperature estimations.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: September 13, 2011
    Assignee: University of Washington
    Inventors: Peter J. Kaczkowski, Ajay Anand
  • Patent number: 7845848
    Abstract: A thermometer and extensometer for cables and conductors is described. The travel time of one or more acoustic signals along a conductor is used to determine the temperature along the conductor and the length of the conductor. The acoustic frequency is selected to minimize temporal dispersion of the propagating acoustic energy. The technique can be used to measure the temperature of the conductor in a buried, undersea or submerged electrical power cable.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: December 7, 2010
    Assignee: FieldMetrics, Inc.
    Inventors: Christopher Yakymyshyn, Michael Allen Brubaker, Pamela Jane Hamilton
  • Patent number: 7845847
    Abstract: A thermometer and extensometer for cables and conductors is described. The travel time of one or more acoustic signals along a conductor is used to determine the temperature along the conductor and the length of the conductor. The acoustic frequency is selected to minimize temporal dispersion of the propagating acoustic energy. The technique can be used to measure the temperature of the windings in a transformer or other electrical apparatus.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: December 7, 2010
    Assignee: FieldMetrics, Inc.
    Inventors: Christopher Yakymyshyn, Michael Allen Brubaker, Pamela Jane Hamilton
  • Patent number: 7731420
    Abstract: At least one transceiver sends ultrasonic pulses through an object, which at least partially transmits ultrasonic pulses, into an element which reflects the ultrasonic pulses. The ultrasonic pulse(s) can be reflected in a temperature-correlated manner from the reflective element to the transceiver.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: June 8, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Gerd Brummel, Uwe Linnert, Klaus Newerla, Michael Willsch
  • Patent number: 7726875
    Abstract: Apparatus, methods, and articles of manufacture for monitoring a condition of a material are disclosed. In particular, the example apparatus, methods, and articles of manufacture emit a first acoustic signal into a wall of the tubular member having a first temperature value and obtain a first propagation time associated with the first acoustic signal. In addition, a second acoustic signal is emitted into the wall having a second temperature value and a second propagation time associated with the second ultrasonic acoustic signal is obtained. The second temperature value is determined based on the first temperature value and the first and second propagation times.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: June 1, 2010
    Assignee: Industrial Measurement Systems, Inc.
    Inventor: Donald E. Yuhas
  • Patent number: 7708461
    Abstract: A method for determining the temperature of an away-facing surface of an object, wherein at least one ultrasonic pulse is transmitted through a surface of the object facing a transmitter/receiver unit into said object; the at least one ultrasonic pulse is reflected at least partially in the direction of the transmitter/receiver unit on the surface of the object facing away from the transmitter/receiver unit; and the reflected part of the at least one transmitted ultrasonic pulse is received by the transmitter/receiver unit. At least one temperature value for the object surface facing the transmitter/receiver unit is also determined; at least one value is determined for the propagation time of the at least one ultrasonic pulse through the object, and at least one temperature value for the object surface facing away from the transmitter/receiver unit is determined by the at least one temperature value for the object surface facing the transmitter/receiver unit and the at least one propagation time value.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: May 4, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Gerd Brummel, Uwe Linnert, Klaus Newerla, Michael Willsch
  • Patent number: 7705292
    Abstract: A condition or detecting a change in the condition of an optical element of a laser arrangement is detected. An ultrasonic signal is coupled into an optical element such that the ultrasonic signal travels along a path within the optical element, and a transit time or a change in transit time for the ultrasonic signal to travel along the path within the optical element is detected.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: April 27, 2010
    Assignee: TRUMPF Werkzeugmaschinen GmbH + Co. KG
    Inventors: Gerhard Hammann, Dieter Hallasch, Juergen Hohenadel
  • Publication number: 20100096767
    Abstract: A method for the measurement of the temperature of a plastified plastic material at the exit of an extruder, characterised in that the function of the sound, velocity in dependence of the temperature is measured and memorised for at least one plastified plastic material, the sound velocity is measured during the extrusion of the plastic material, and the respective temperature is determined from the velocity measurement values and the function.
    Type: Application
    Filed: October 12, 2009
    Publication date: April 22, 2010
    Applicant: Sikora AG
    Inventors: Harald Sikora, Torben Clausen
  • Publication number: 20100046576
    Abstract: Methods of performing ultrasonic testing are disclosed, comprising the step of determining a temperature gradient of an ultrasonic wedge. In one embodiment of the invention, the method further comprises the steps of determining a sound velocity gradient of the ultrasonic wedge to determine the time it takes for sound waves emanating from a plurality of ultrasonic transducer elements attached to the ultrasonic wedge to reach a point of interest within a test object, and firing each of the ultrasonic transducer elements in a timed sequence based on the times such that sound waves from each of the ultrasonic transducer elements reach the point of interest at the same time. In other embodiments of the invention, the total attenuation and acoustic impedance of a sound wave traveling through the ultrasonic wedge is determined to adjust the amplitude of the sound wave such that the sound wave has sufficient amplitude to perform the ultrasonic testing.
    Type: Application
    Filed: August 19, 2008
    Publication date: February 25, 2010
    Inventor: Anand DESAI
  • Publication number: 20090279582
    Abstract: A thermometer and extensometer for cables and conductors is described. The travel time of one or more acoustic signals along a conductor is used to determine the temperature along the conductor and the length of the conductor. The acoustic frequency is selected to minimize temporal dispersion of the propagating acoustic energy. The technique can be used to measure the temperature of the conductor in a buried, undersea or submerged electrical power cable.
    Type: Application
    Filed: July 13, 2009
    Publication date: November 12, 2009
    Inventors: Christopher Yakymyshyn, Michael Allen Brubaker, Pamela Jane Hamilton
  • Publication number: 20090279581
    Abstract: A thermometer and extensometer for cables and conductors is described. The travel time of one or more acoustic signals along a conductor is used to determine the temperature along the conductor and the length of the conductor. The acoustic frequency is selected to minimize temporal dispersion of the propagating acoustic energy. The technique can be used to measure the temperature of the windings in a transformer or other electrical apparatus.
    Type: Application
    Filed: July 13, 2009
    Publication date: November 12, 2009
    Inventors: Christopher Yakymyshyn, Michael Allen Brubaker, Pamela Jane Hamilton
  • Publication number: 20090268776
    Abstract: An object of the present invention is to provide a piezoelectric resonator provided with a electrode on the surface of a plate piezoelectric blank, which excites the piezoelectric blank, the piezoelectric resonator being capable of suppressing deterioration of an electrode under high temperature circumstances. Another object is to provide a temperature sensor suitable for temperature measurement at high temperatures. As a concrete means for solving the problems is that the electrode includes a first metal layer, formed on the surface of the piezoelectric blank, and made of at least one kind selected from the group consisting of chromium (Cr), titanium (Ti), nickel (Ni), aluminum (Al) and copper (Cu), or having the same adhesion to the above-described piezoelectric blank as that of these metals; a second metal layer made of gold (Au) or silver (Ag) deposited on the surface of the first metal layer; and a third metal layer made of chromium (Cr) deposited on the surface of the second metal layer.
    Type: Application
    Filed: July 21, 2006
    Publication date: October 29, 2009
    Inventor: Mitsuaki Koyama
  • Patent number: 7575371
    Abstract: A thermometer and extensometer for cables and conductors is described. The travel time of one or more acoustic signals along a conductor is used to determine the temperature along the conductor and the length of the conductor. The acoustic frequency is selected to minimize temporal dispersion of the propagating acoustic energy. The technique can be used to measure the temperature and sag of an overhead power line, the temperature of the windings in a transformer, or the temperature of the central conductor in a coaxial power cable.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: August 18, 2009
    Assignee: FieldMetrics, Inc
    Inventors: Christopher Paul Yakymyshyn, Michael Allen Brubaker, Pamela Jane Hamilton
  • Publication number: 20090122830
    Abstract: The field of the invention is that of surface acoustic wave transponders and associated devices. This invention applies more particularly to the techniques for identifying and locating transponders. It also applies to the transmission of information or measurements, the transponder then being used as a transducer. This type of transponder can, in particular, be used on vehicles, and in particular on road vehicles. The inventive transponder (1) comprises a surface acoustic wave device, comprising one or more electronic filters (101) with narrow spectral band centered on one or more central frequencies and a delay line (102) operating in reflection mode. By having narrowband filters centered on different frequencies, it is thus possible to easily discriminate between different transponders. The delay lines make it possible to simply separate the transmitted signal and the received signal. The inventive transponder can also be used as a transducer.
    Type: Application
    Filed: December 14, 2005
    Publication date: May 14, 2009
    Applicant: SENSEOR
    Inventor: Michel CHOMIKI
  • Patent number: 7481577
    Abstract: Ultrasound transducer temperatures are measured in response to a temperature dependent property of the ultrasound transducer. The temperature is measured without addition of new electronics or hardware retrofits of the transducer. By implementing software and/or hardware on the ultrasound system rather than the transducer, the temperature is measured in order to provide a level of fault protection. The upgraded or new ultrasound system uses either old or new transducers while still providing temperature measurement. For example, the temperature of the lens or window is measured as a function of changes in attenuation or acoustic velocity. The receive beamformer already implemented on many ultrasound systems is used to measure a temperature dependent property of the lens or window. As another example, the dielectric constant or capacitance of one or more transducer elements is measured using additional hardware in the ultrasound system.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: January 27, 2009
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Bhaskar Ramamurthy, John Douglas Marshall, Jan-Ulco Kluiwstra
  • Patent number: 7470056
    Abstract: Apparatus, methods, and articles of manufacture for monitoring a condition of a cavity surface of an elongated member having a cavity therein. In particular, the example apparatus, methods, and articles of manufacture emit a first ultrasonic signal that propagates from a first surface of an elongated member having a cavity therein toward a second surface of the cavity having a first temperature value. First and second echoes associated with the first ultrasonic signal are then obtained. At least one of the first and second echoes is associated with a recess in the second surface. A condition of the second surface is monitored by determining a second temperature value of the second surface based on the first and second echoes and the first temperature value.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: December 30, 2008
    Assignee: Industrial Measurement Systems, Inc.
    Inventor: Donald E. Yuhas
  • Publication number: 20080298427
    Abstract: The invention relates to a device (31) which comprises at least one piezoacoustic resonator element (2) having a piezoelectric layer (32) and two electrodes that are electrically contacted to the piezoelectric layer (32). The piezoacoustic resonator element (2) is configured in such a manner that, when a voltage is applied to the piezoelectric layer (32), a thickness oscillation of the piezoelectric layer (32) is excited via the electrodes with a resonant frequency. The inventive device is characterized by comprising, integrated into the piezoacoustic resonator element (2), a temperature measurement device (3) having a measuring element (37) that is configured as a thin layer.
    Type: Application
    Filed: September 7, 2006
    Publication date: December 4, 2008
    Applicant: Siemens Aktiengesellschaft
    Inventors: Reinhard Gabl, Matthias Schreiter
  • Patent number: 7438684
    Abstract: A technology is disclosed for holding the test subject contact surface temperature below a predetermined value without providing a temperature sensor or setting ultrasonic wave output excessively low and, according to this technology, reflex time t1, which passes through oil 6, is reflected by the inner surface of window 5, and is returned via oil, and reflex time t2, which passes through the window, is reflected by the outer surface of the window, and returned via window or oil, are detected, sound velocity of window=(thickness of window×2)/(t2?t1) is measured, and the surface temperature of the window is detected from this measured sound velocity.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: October 21, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Kiyoshi Fujii
  • Patent number: 7434989
    Abstract: A temperature measurement system is characterized by at least one passive surface acoustic wave (SAW) temperature sensor. The sensor includes at least one piezoelectric substrate having an interdigital SAW transducer disposed upon the piezoelectric substrate for conversion of an RF signal into an acoustic wave and vice versa. At least three additional SAW elements are also disposed on the substrates in a manner such that they define two acoustic propagation paths that are non-parallel relative to the crystal axes of the substrates, and such that the temperature coefficients of delay in the two tracks differ. The SAW elements receive a signal from the SAW transducer and produce response signals. The response signals combine to produce a signal with a power spectral density such that the integrated power within each of two specified portions of the spectrum provides an indicator of the temperature.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: October 14, 2008
    Assignee: Applied Sensor Research & Development Corporation
    Inventor: Leland P. Solie
  • Patent number: 7434988
    Abstract: An acoustic pyrometer measures the average gas temperature across a space of known distance, especially turbulent, high temperature gas loaded with caustic particulates. It includes an acoustic signal generator that generates a high amplitude acoustic signal with a short rise time The acoustic signal generator includes an outer tank closed at top and bottom ends by top and bottom end walls and enclosing an outer chamber. A cylinder is supported within the tank and has top and bottom opposed ends. A mid-plate extends across the cylinder and defines the bottom end, and an axial opening in the mid-plate receives a shaft of a piston assembly having an upper piston and a lower piston at ends of the shaft. A throat is attached to the bottom end, and receives the lower piston. The lower piston seals the throat when received in the throat. The upper piston is slidable in the cylinder under influence of air pressure.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: October 14, 2008
    Assignee: Enertechnix, Inc.
    Inventors: George Kychakoff, Michael F. Anna, Ed Danzer
  • Patent number: 7404671
    Abstract: Acoustic temperature measurement at a remote location is provided. An acoustic source transmits acoustic radiation to an acoustic receiver along an acoustic path. The path passes through or near the remote location. The temperature is non-uniform along the path. A change in an integrated acoustic delay between the source and receiver along the path is measured. This acoustic delay can be either a phase velocity delay or a group velocity delay. The temperature at the remote location is determined by relating the measured change in integrated acoustic delay to the remote location temperature with a combined thermal-acoustic model. The combined model relates temperature to acoustic propagation velocity along the path. The combined model preferably includes temperatures of the source and receiver locations, and a heat source geometry at the remote location.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: July 29, 2008
    Assignee: Luna Innovations Incorporated
    Inventors: Joseph S. Heyman, Eugene V. Malyarenko
  • Patent number: 7376522
    Abstract: In an exemplary implementation of a method and system for determining the direction of fluid flow, one or more sound transducers are positioned in proximity to a conduit, each such sound transducer generating a signal representative of a selected characteristic of acoustic waves emanating from the conduit. Such signals are collected and analyzed to determine a threshold value for the selected characteristic (e.g., frequency) indicative of a change in the direction of fluid flow through the conduit. Based on whether subsequent measurements of the selected characteristic (e.g., frequency) are above or below the threshold value, the direction of fluid flow can be predicted and/or a change in the operational state of a component associated with the conduit can be identified.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: May 20, 2008
    Assignee: Genscape Intangible Holding, Inc.
    Inventors: Sterling Lapinski, Deirdre Alphenaar, Susan Olson
  • Publication number: 20080107150
    Abstract: A method for determining the temperature of an away-facing surface of an object, wherein at least one ultrasonic pulse is transmitted through a surface of the object facing a transmitter/receiver unit into said object; the at least one ultrasonic pulse is reflected at least partially in the direction of the transmitter/receiver unit on the surface of the object facing away from the transmitter/receiver unit; and the reflected part of the at least one transmitted ultrasonic pulse is received by the transmitter/receiver unit. At least one temperature value for the object surface facing the transmitter/receiver unit is also determined; at least one value is determined for the propagation time of the at least one ultrasonic pulse through the object, and at least one temperature value for the object surface facing away from the transmitter/receiver unit is determined by the at least one temperature value for the object surface facing the transmitter/receiver unit and the at least one propagation time value.
    Type: Application
    Filed: September 16, 2005
    Publication date: May 8, 2008
    Inventors: Hans-Gerd Brummel, Uwe Linnert, Klaus Newerla, Michael Willsch
  • Patent number: 7266989
    Abstract: A sensor system immersible in an ambient-fluid for sensing at least two conditions of the ambient fluid, includes a sealed chamber filled with a reference fluid of a known composition and/or pressure, and two acoustic transmission channels, one including the reference fluid, and the other including the ambient fluid. Measuring circuitry measures (a) the transit time of an energy wave through one transmission channel to determine the temperature of the fluid within the sealed chamber and thereby the temperature of the ambient fluid; and (b) the transit time of an energy wave through the other transmission channel to determine the composition and/or the pressure of the ambient fluid.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: September 11, 2007
    Assignee: Nexense Ltd.
    Inventor: Arie Ariav