Transducer Switching Or Gating Patents (Class 367/105)
  • Patent number: 10806429
    Abstract: An ultrasonic imaging apparatus includes an ultrasonic probe and a delay amount calculation unit. Each of the delay circuits is configured to allow a first delay amount and a second delay amount to be set for each of the delay circuits, and delays a signal by a delay amount obtained by adding the first delay amount and the second delay amount together. The delay amount calculation unit calculates the first delay amount and the second delay amount such that a sum of the first delay amount and the second delay amount set for each of the delay circuits is equal to or less than a predefined maximum delay amount.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: October 20, 2020
    Assignee: Hitachi, Ltd.
    Inventor: Shinta Takano
  • Patent number: 10754528
    Abstract: Techniques are disclosed for systems and methods to provide intuitive user interfaces for sonar systems attached to mobile structures. A sonar user interface system includes a logic device configured to communicate with one or more sonar controllers and/or sonar transducer assemblies and associated processing and control electronics and optionally orientation and/or position sensors disposed substantially within the sonar transducer assemblies. Each sonar controller and/or transducer assembly includes channels that can be operated together or independently. Configurations for each channel, transducer assembly, controller, and/or for the entire sonar system are rendered and displayed using a combination of graphical and textual indicators to allow intuitive selection and/or arrangement of system, controller, assembly, and/or channel configurations and to store configurations for recall.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: August 25, 2020
    Assignee: FLIR SYSTEMS, INC.
    Inventor: Christopher Daniel Gatland
  • Patent number: 10610198
    Abstract: An ultrasound system (10) which is capable of biplane imaging is able to display, store and export independent image frames of only the reference image or only the variable orientation image, or the standard display of both images. The system is also able to sweep through a range of image plane orientations and to automatically acquire an image in each orientation over the range of plane orientations. The system is preferably operable in the biplane tilt mode, the biplane rotate mode, or the biplane elevation tilt mode.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: April 7, 2020
    Assignee: Koninklijke Philips N.V.
    Inventor: Michael Schauf
  • Patent number: 10551497
    Abstract: Methods, apparatuses, and computer program products are therefore provided for producing a 3D image of an underwater environment. An example method for providing an image of an underwater environment includes analyzing sonar returns to identify and display objects, such as fish or debris, in a 3D view. Such an image allows for differentiation between the sea floor and objects in a 3D sonar view. Some example methods provide for real-time tracking of fish. Further, the fish or other objects may be displayed over a continuous surface geometry based on sonar returns from a lake, sea, or river “floor.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: February 4, 2020
    Assignee: NAVICO HOLDING AS
    Inventors: Matthew Hunt, Shahzad F. Kirmani
  • Patent number: 10509094
    Abstract: The invention relates to a method for determining the direction of a source of waterborne sound that emits a waterborne acoustic signal, by means of a hydrophone arrangement which forms a linear antenna or a virtual linear antenna, as well as to a computer program product, a computer, a sonar, and a watercraft.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: December 17, 2019
    Assignee: ATLAS ELEKTRONIK GMBH
    Inventor: Werner Loges
  • Patent number: 10499878
    Abstract: A portable ultrasonic imaging probe that is adapted to connect to a host computer via a passive interface cable. The probe includes an array of ultrasound transducers, a high voltage pulser for energizing transducers to emit an ultrasound pulse, analog signal processing circuitry that combines echoes detected by transducers into a single analog echo signal, am analog-to-digital converter that converts the analog echo signal into a digital echo signal; and interface circuitry that transfers the digital echo signal across the passive interface cable to the host computer. The probe includes transmit switches configured to selectively connect sets of ultrasound transducers to the HV pulser and a plurality of receive switches configured to selectively connect sets of ultrasound transducers to the analog signal processing circuitry.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: December 10, 2019
    Assignee: INTERSON CORPORATION
    Inventor: Roman Solek
  • Patent number: 10426436
    Abstract: An ultrasonic probe includes a multi-dimensionally arrayed transducer, a matching layer, and a backing layer. The transducer includes element groups having different focal distances and simultaneously transmitting ultrasonic signals toward an object. According to the ultrasonic imaging apparatus using the multi-dimensionally arrayed transducer, a multi-focus transmission is performed. Thus, the multi-focus ultrasonic image may be acquired within a short period of time, thereby increasing frame rates, and a high-quality image in which all areas are focused may be quickly acquired.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: October 1, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joo Young Kang, Sung Chan Park, Kyu Hong Kim, Jung Ho Kim, Su Hyun Park
  • Patent number: 10281577
    Abstract: Methods, apparatuses, and computer program products are therefore provided for producing a 3D image of an underwater environment. An example method for providing an image of an underwater environment includes analyzing sonar returns to identify and display objects, such as fish or debris, in a 3D view. Such an image allows for differentiation between the sea floor and objects in a 3D sonar view. Some example methods provide for real-time tracking of fish. Further, the fish or other objects may be displayed over a continuous surface geometry based on sonar returns from a lake, sea, or river “floor.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: May 7, 2019
    Assignee: NAVICO HOLDING AS
    Inventors: Matthew Hunt, Shahzad F. Kirmani
  • Patent number: 10139479
    Abstract: An array of piezoelectric ultrasonic transducer elements includes a plurality of superpixel regions. Each superpixel region includes at least two pixel sets, a first pixel set of the at least two pixel sets being disposed in a central portion of the superpixel region, and at least a second pixel set being disposed in an outer portion of the superpixel region. An electrical coupling may be provided between the array and transceiver electronics. The transceiver electronics may be configured to operate the array in a selectable one of a first mode and a second mode. In the first mode, the array generates a substantially plane ultrasonic wave having a first acoustic pressure. In the second mode, the array generates, from each superpixel region, a focused beam having a second acoustic pressure that is substantially higher than the first acoustic pressure.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: November 27, 2018
    Assignee: QUALCOMM INCORPORATED
    Inventors: Yipeng Lu, Hao-Yen Tang, Hrishikesh Vijaykumar Panchawagh
  • Patent number: 9810784
    Abstract: A system for small space positioning comprises a transmitting element at a fixed and known location, which transmitting a modulated continuous wave, for example an ultrasonic wave, having a continuous carrier signal part and a base-band signal modulated thereon. The transmitting element transmits the modulated continuous wave over a range in which an object to be positioned may appear. A receiving element receives signals transmitted by the transmitting device and reflected by the object, and a position detection element determines a position of the object from analysis of both the carrier signal part and the base-band signal received from the reflected signal.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: November 7, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Nathan Altman, Yossef Tsfaty, Meir Agassy
  • Patent number: 9802681
    Abstract: This disclosure provides wave-powered vessels equipped for fish stock management. The vessels have observational sensors for monitoring fish, a positional sensor to determine the geographical location of the vessel, and a transmitter for sending data to a central control unit. The observational sensors may be deployed on a tow body pulled behind the vessel, or the tow body may relay information from sensors located on a separate unit on the bottom or at a defined depth. The control unit communicates with each of the monitor vessels to direct navigation and obtain data from the sensors. Substance distribution vessels in the fleet are equipped to distribute fish food in target area for the purpose of fish farming.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: October 31, 2017
    Assignee: LIQUID ROBOTICS, INC.
    Inventor: Roger G. Hine
  • Patent number: 9692562
    Abstract: A communication apparatus includes an output portion and a controller. The output portion outputs an output signal. The output signal includes a synchronization signal, a data signal, and an end signal in this order. The controller includes a measuring portion that measures a length of a received pulse, a signal determiner that determines whether the received pulse corresponds to the synchronization signal based on the length of the received pulse, and a signal acquisition portion. The signal acquisition portion skips the received pulse in a case where the signal determiner determines that the received signal does not include the synchronization signal. The signal acquisition portion considers the received signal as the synchronization signal and reads a pulse following the received pulse to the end signal in a case where the signal determiner determines that the received signal includes the synchronization signal.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: June 27, 2017
    Assignee: DENSON CORPORATION
    Inventor: Takaharu Kozawa
  • Patent number: 9622724
    Abstract: An ultrasound imaging system and method includes identifying, with a processor, a subset of the ultrasound channel data with a specular reflector signature, and implementing, with the processor, a specular reflector processing technique on the subset of the ultrasound channel data to calculate at least one of a position and an orientation of a specular reflector. The system and method includes performing an action based on at least one of the position and the orientation of the specular reflector.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: April 18, 2017
    Assignee: General Electric Company
    Inventors: Eigil Samset, Anders Rasmus Sørnes, Raja Sekhar Bandaru
  • Patent number: 9551802
    Abstract: A method and towed sonic array system for defocusing the beampattern of the towed sonic array. The method includes determining an amplitude adjustment and a phase adjustment for each of the sonic projectors; and driving each of the sonic projectors with a drive signal modified by the amplitude adjustment and the phase adjustment for that sonic projector. The amplitude adjustment and phase adjustment for each of the sonic projectors are, at least in part, based upon the distance from that sonic projector to a virtual source. The location of the virtual source may be selected so as to achieve different beampatterns, including wide-sector beams and, in at least one case, a near-omni-directional beampattern. The drive signal may include multiple frequency components, in which case the method may be used to find a set of beamformer coefficients for each of the frequency components and an inverse transform may be used to realize a defocused driving signal.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: January 24, 2017
    Assignee: ULTRA ELECTRONICS MARITIME SYSTEMS INC.
    Inventor: Olivier Beslin
  • Patent number: 9453819
    Abstract: An ultrasonic flaw detector including an ultrasonic probe for emitting an ultrasonic wave on an object to be inspected and receiving a reflected ultrasonic wave from the object, a drive element control unit for controlling a plurality of ultrasonic elements to emit an ultrasonic wave from the ultrasonic probe and to control a reflected ultrasonic wave from the object, and a calculation unit for obtaining, by using a refraction angle of the ultrasonic wave at a time of the ultrasonic wave entering the object, an incident position of the ultrasonic wave on a surface of the object, and a surface shape of a surface of the object at the incident position, the incident angle of the ultrasonic wave entering the incident position, and obtaining a plurality of ultrasonic elements to be driven, based on the incident position and the incident angle.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: September 27, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Setsu Yamamoto, Takahiro Miura, Jun Semboshi, Makoto Ochiai, Satoshi Nagai, Kazumi Watanabe, Tadahiro Mitsuhashi, Hiroyuki Adachi, Satoshi Yamamoto, Junichi Takabayashi, Masaru Otsuka
  • Patent number: 9252799
    Abstract: A receiver with orthogonal beam forming technique is achieved that is capable of differentiating different signal components within the received composite signal. An adaptive processor is used to eliminate the signal component whose phase information is known or can be calculated. The phase information of the major component of a signal can be easily acquired by using a limiter. The phase information of other signal components can be acquired by their direction information and other characteristics, such as modulation scheme, etc. Multiple orthogonal beams can be formed by eliminating one unwanted signal component each time by the adaptive processor until all unwanted signal is eliminated. Thus, a composite signal from multiple sources can be broken down into their component signals.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: February 2, 2016
    Assignee: SPATIAL DIGITAL SYSTEMS, INC.
    Inventors: Donald C. D. Chang, Yulan Sun, Frank Lu
  • Patent number: 9252352
    Abstract: An ultrasonic transducer device includes an ultrasonic transducer element array, a first signal terminal and a second signal terminal. The ultrasonic transducer element array has a 1st element group to a kth element group (where k is a natural number such that k?2). The first signal terminal is connected with a control section configured to perform at least one of receiving and transmitting of signals. The second signal terminal is connected with the first signal terminal via the ultrasonic transducer element array. Each of the 1st element group to the kth element group includes a plurality of ultrasonic transducer elements electrically connected in parallel. The 1st element group to the kth element group are electrically connected in series between the first signal terminal and the second signal terminal.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: February 2, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Hiroshi Matsuda
  • Patent number: 9246077
    Abstract: An ultrasonic transducer device includes an ultrasonic transducer element array, a first signal terminal, and a second signal terminal. The ultrasonic transducer element array has a 1st element group to a kth element group (where k is a natural number such that k?2). The first signal terminal is connected with a control section configured and arranged to perform at least one of receiving and transmitting of signals. The second signal terminal is connected with the first signal terminal via the ultrasonic transducer element array. Each of the 1st element group to the kth element group includes a plurality of ultrasonic transducer elements electrically connected in series. The 1st element group to the kth element group are electrically connected in parallel between the first signal terminal and the second signal terminal.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: January 26, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Hiroshi Matsuda, Tsukasa Funasaka
  • Patent number: 9244161
    Abstract: An ultrasound transmission circuit comprises a pulse generating circuit, a feedback circuit and a processing circuit. The feedback circuit outputs a trigger signal according to a first pulse signal arriving at an ultrasound transducer. The processing circuit records a first time point at which the first pulse signal is generated, and records a second time point at which the first pulse signal arrives the ultrasound transducer according to the trigger signal. The processing circuit adjusts a first delay value according to a variance between the first time point and the second time point to generate a second delay value, and drives the pulse generating circuit according to the second delay value to generate a second pulse signal.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: January 26, 2016
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chin Hsia, Yu-Te Kao
  • Patent number: 9199380
    Abstract: An acoustic pretouch sensor or proximity sensor (110) includes a cavity (104) with a first microphone (106) disposed therein, and optionally a second microphone (108) disposed outside of the cavity. A processing system (110) receives the signals generated by the first microphone and analyzes the spectrum to produce a result representing the resonant frequency of the cavity. The processing system may optionally subtract the second microphone signal spectrum from the first to automatically compensate for changes in ambient noise. The processing system uses the resonant frequency to estimate the distance from the cavity opening to a surface (90). For example, the pretouch sensors may be incorporated into a stand alone device (100), into a robotic end effector (204), or into a device such as a phone (300).
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: December 1, 2015
    Assignee: University of Washington through its Center for Commercialization
    Inventors: Joshua R. Smith, Liang-Ting Jiang
  • Patent number: 9184370
    Abstract: An ultrasonic transducer device includes an ultrasonic element array and a common electrode wiring. The ultrasonic element array has three ultrasonic element rows with each of the three ultrasonic element rows including a plurality of ultrasonic elements arranged along a first direction and electrically connected to each other. The three ultrasonic element rows are arranged along a second direction intersecting with the first direction. The common electrode wiring is configured and arranged to supply a common voltage to at least one of the three ultrasonic element rows. The common electrode wiring extends in the first direction and is arranged between two of the three ultrasonic element rows positioned on outer sides among the three ultrasonic element rows with respect to the second direction.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: November 10, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Kazuyuki Kano
  • Publication number: 20130301391
    Abstract: A system for small space positioning comprises a transmitting element at a fixed and known location, which transmitting a modulated continuous wave, for example an ultrasonic wave, having a continuous carrier signal part and a base-band signal modulated thereon. The transmitting element transmits the modulated continuous wave over a range in which an object to be positioned may appear. A receiving element receives signals transmitted by the transmitting device and reflected by the object, and a position detection element determines a position of the object from analysis of both the carrier signal part and the base-band signal received from the reflected signal.
    Type: Application
    Filed: November 16, 2011
    Publication date: November 14, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Nathan Altman, Yossef Tsfaty, Meir Agassy
  • Patent number: 8532822
    Abstract: A system is employed for defining a position (location) of a receiving element inside an area surrounded by a wire loop, along the perimeter (a perimeter wire loop), of a work area or other bounded area. In particular, the system can determine whether the receiver is inside or outside the loop, and evaluate its distance from the perimeter wire.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: September 10, 2013
    Assignee: F Robotics Acquisitions Ltd.
    Inventors: Shai Abramson, Eli Levi
  • Patent number: 8172755
    Abstract: A beamforming apparatus is provided for improving beamforming accuracy by employing fractional delay filters in an interpolation process and reducing hardware complexity by using post-filtering technique. The beamforming apparatus of the present invention includes a post-filtering means implemented with fractional delay filters that combines block data, on the respective channels, supposed to be fractionally delayed and obtains a delay value of fractional part from the combined data. The post-filtering means collects the block data of the channels assigned identical coefficients and performs a filtering process simultaneously.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: May 8, 2012
    Assignee: Industry-University Cooperation Foundation Sogang University
    Inventors: Tai-Kyong Song, Jeong Cho, Jae-Hee Song
  • Patent number: 8046103
    Abstract: A system is employed for defining a position (location) of a receiving element inside an area surrounded by a wire loop, along the perimeter (a perimeter wire loop), of a work area or other bounded area. In particular, the system can determine whether the receiver is inside or outside the loop, and evaluate its distance from the perimeter wire.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: October 25, 2011
    Assignee: F Robotics Acquisitions Ltd.
    Inventors: Shai Abramson, Eli Levi
  • Patent number: 8038620
    Abstract: A method for Fresnel zone imaging is provided. The method comprises identifying a plurality of constructive regions and a plurality of destructive regions in an energy transmitting device and converting the destructive regions to the constructive regions by using an apodization profile. The apodization profile comprises apodization values for each constructive region and destructive region and the apodization values comprise real numbers.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: October 18, 2011
    Assignee: General Electric Company
    Inventors: Warren Lee, Kenneth Wayne Rigby, Lowell Scott Smith
  • Patent number: 7678048
    Abstract: A medical diagnostic ultrasound system comprises several subsystems, such as a transmit beamformer, a receive beamformer, a B-mode processor, a Doppler processor and a scan converter. These subsystems are within the ultrasound data processing path for processing ultrasound data. One or more of these subsystems are implemented with one or more re-programmable logic devices. For example, one or two field programmable gate arrays are used is each subsystem to perform most or almost all of the subsystems essential functionality.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: March 16, 2010
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Joseph A. Urbano, Christopher B. Knell, Kevin S. Randall, Andrew J. Wood
  • Publication number: 20090154292
    Abstract: A transducer senses repetitive pulses on a magnetostrictive element and provides transducer output bursts. A transducer circuit detects the transducer output bursts. An energy storage device couples to a power input of the transducer circuit. A switching power supply couples to the energy storage device and has repetitive suppressed states during which switching in the switching power supply is suppressed. A sequence circuit provides synchronization of the repetitive suppressed states of the switching power supply with the transducer output bursts.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 18, 2009
    Applicant: MTS Systems Corporation
    Inventors: Uwe Viola, Aleksey G. Minin, Frank Kraehe
  • Publication number: 20090054780
    Abstract: A method for real-time computation of point-by-point apodization coefficients used for beam-forming includes storing apodization coefficients of receiving focus points in memory, and computing at least one of an included angle between a vector from a transducer element to a receiving point and a normal vector of the transducer element, and a trigonometric function value of the included angle. The method also includes addressing the memory storing the apodization coefficients according to the quantized included angle or trigonometric function value, and reading the apodization coefficients. In one embodiment, the method may include computing in advance apodization coefficients of a receiving focus point as the starting point for the subsequent interpolation operation and another receiving focus point as the ending point, and deriving, for each receiving channel, apodization coefficients of the points situated between these two receiving focus points through an interpolation operation.
    Type: Application
    Filed: December 31, 2007
    Publication date: February 26, 2009
    Applicant: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
    Inventors: Bo Yang, Pengfei Yang, Qinjun Hu
  • Patent number: 7289390
    Abstract: An ultrasonic apparatus is disclosed that includes a transducer having a plurality of transducer elements, a controller operatively connected to the transducer and driving the transducer elements to produce a first ultrasonic transmitting beam having a first frequency and a second ultrasonic transmitting beam having a second frequency; and a processor operatively connected to said transducer for forming and moving reception beams to receive echo signals and extracting frequency components corresponding to said first ultrasonic transmitting beam and said second ultrasonic transmitting beam.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: October 30, 2007
    Assignee: Furuno Electric Company, Limited
    Inventors: Yasushi Nishimori, Minoru Handa, Shiroh Ozasa
  • Patent number: 7280435
    Abstract: A device comprising an array of sensors that are reconfigurable by means of a switching network. The sensors may be optical, thermal or pressure sensors or ultrasonic transducers.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: October 9, 2007
    Assignee: General Electric Company
    Inventors: Kai Erik Thomenius, Rayette Ann Fisher, Robert Gideon Wodnicki, Christopher Robert Hazard, Lowell Scott Smith, David Martin Mills
  • Patent number: 7274622
    Abstract: The present invention presents a method for use with an acoustic sensor array comprised of a number of pressure-vector sensors capable of sensing the acoustic scalar field and acoustic vector field of an acoustic wave. The method is a signal processing technique that utilizes nonlinear processing of pressure-vector sensor signals in the acoustic sensor array. The method involves the steps of receiving the sensor output values, processing the output values using a non-linear algorithm to create a mathematical series of values, transforming the series, applying weighting to the series and performing a summation of the values in the series to calculate the array directivity response. The array directivity response can then be further processed where the array is part of a sonar system.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: September 25, 2007
    Assignee: The United States of America represented by the Secretary of the Navy
    Inventors: Dehua Huang, Roy C. Elswick
  • Patent number: 7257051
    Abstract: An integrated switch matrix for reconfiguring subelements of a mosaic sensor array to form elements. The configuration of the switch matrix is fully programmable. The switch matrix includes access switches that connect subelements to bus lines and matrix switches that connect subelements to subelements. Each subelement has a unit switch cell comprising at least one access switch, at least one matrix switch, a respective memory element for storing the future state of each switch, and a respective control circuit for each switch. The access and matrix switches are of a type having the ability to memorize control data representing the current switch state of the switch, which control data includes a data bit input to turn-on/off circuits incorporated in the control circuit. The sensor array and the switching matrix may be built in different strata of a co-integrated structure or they may be built on separate wafers that are electrically connected.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: August 14, 2007
    Assignee: General Electric Company
    Inventors: Kai E. Thomenius, Rayette Ann Fisher, Robert Gideon Wodnicki, William Edward Burdick, Jr.
  • Patent number: 6926671
    Abstract: An ultrasonic imaging apparatus and method combines dynamically focused reception and coded transmission/reception technologies by inexpensive circuitry. A receive aperture is divided into smaller apertures. Correspondingly, a receive beam former is divided into receive sub-beam formers 36a to 36n by which a phase alignment and summing process is performed. Thereafter, coded signals are compressed in decoders 37a to 37n in a time axis direction. Output signals from the decoders are once again subjected to a phase alignment and summing process in a second beam former.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: August 9, 2005
    Assignee: Hitachi Medical Corporation
    Inventors: Takashi Azuma, Shin-ichiro Umemura, Yuichi Miwa
  • Patent number: 6836159
    Abstract: An integrated high-voltage switching circuit includes a switch having ON and OFF states and having a parasitic gate capacitance. The switch consists of a pair of DMOS transistors integrated back to back and having a shared gate terminal, the drains of the DMOS transistors being connected to the input and output terminals of the switch respectively. The switching circuit further includes a turn-on circuit comprising a PMOS transistor having its drain connected to the shared gate terminal of the switch via a first diode, having its source connected to a global switch gate bias voltage terminal from which the PMOS transistor draws current, and having its gate electrically coupled to a switch gate control terminal that receives a switch gate control voltage input.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: December 28, 2004
    Assignee: General Electric Company
    Inventor: Robert Gideon Wodnicki
  • Patent number: 6445646
    Abstract: Signals entered from receiving transducer elements of 160 channels are multiplexed into 10 signal lines by 10 multiplexers. Each of 10 A/D converters converts the signals of 16 channels from analog from into digital form. The multiplexers are switched with synchronized switching timing to produce 10 pieces of sample data strings with the same timing. 160 pieces of sample data sampled in a steplike form are shifted in phase according to an oblique-line sampling scheme. The signal of the same channel is sampled twice with a phase delay of 90° so that the signal can be converted into complex-valued sample data without increasing the number of processing circuits.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: September 3, 2002
    Assignee: Furuno Electric Company, Limited
    Inventors: Minoru Handa, Hideharu Morimatsu, Yasushi Nishimori, Mitsuaki Watanabe
  • Patent number: 6421299
    Abstract: An apparatus and method for scanning a body of water for fish and other underwater articles with a sonar depth finder of a type having a transducer that can transmit an acoustic wave and receive sonar returns on both a narrow acoustic wave beam mode and on a wide acoustic wave beam mode, in which the sonar depth finder repetitively determines the approximate depth of the body of water by repetitively transmitting in the wide beam mode and receiving and displaying the sonar returns from each transmission initially in the wide beam mode and then in the narrow beam mode, with the duration of receiving in the narrow acoustic wave beam mode being a function of the determined depth from a prior transmission.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: July 16, 2002
    Assignee: Techsonic Industries, Inc.
    Inventors: David A. Betts, Louis Loving
  • Patent number: 6310831
    Abstract: A method and system for compensating for steering anomalies by adjusting aperture in steered phased array transducer systems adjusts the aperture of a transducer array to effectively compensate for the steering anomalies. The aperture of the transducer array can be varied depending upon the steering angle of the beam and the resultant steering angle anomalies.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: October 30, 2001
    Inventor: Richard F Dillman
  • Patent number: 6285628
    Abstract: The invention pertains a bathymetric sonar system involving a single swept transmit beam projector system which compensates for ship attitude and positioning changes. A sonar transducer array has a matrix of acoustic projector elements arranged in a plurality of substantially parallel rows and a plurality of substantially parallel columns; and means for causing each of the projector elements to generate an acoustic signal at a frequency and phase independently from each other projector element. Preferably the transducer array is operated by causing the projector elements to generate an acoustic signal at a frequency and phase independently from each other projector element, at a frequency and phase which is initially the same as the frequency and phase of each other element in its column and such that the frequency and phase of the projector elements in each column is different from each other column. Thus a single swept beam is projected toward the ocean floor.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: September 4, 2001
    Assignee: L3 Communications Corporation
    Inventor: Kenneth C. Kiesel
  • Patent number: 6181643
    Abstract: The interferometer, which is preferably in the form of a sonar, can have a single projector array and a single receiver array. The projector array comprises a first subset of projector elements that function as a first pseudo projector and a second subset of projector elements that function as a second pseudo projector. One or more of the projector elements belong in both the first and the second subsets, such that one or more of the projector elements function as part of both the first and the second pseudo projectors. A receiver is operative for receiving reflected portions of the signals emitted by the pseudo projectors. A processing system analyzes the signals received by the receiver to at least partially determine the position of an object.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: January 30, 2001
    Assignee: The Boeing Company
    Inventor: Richard Ove Nielsen
  • Patent number: 6138513
    Abstract: New apodization functions providing an effective rejection of side lobe amplitude level within wide range of beam steering angles are described in this invention. A central amplitude apodization function (13) reduces amplitudes for the central section of transmit and receive array individual elements. A time apodization function (14) changes a duration of transmit pulses. A duration of transmit pulses is short for central section of transmit array and increases for outlying transmit individual elements. A frequency apodization function (15) changes frequency of transmit pulses for different transmit individual elements. The use of new apodization function allows realization of portable acoustic scanners. Some versions of a portable acoustic scanner design and a version with time compression of echo signals are described.
    Type: Grant
    Filed: January 9, 1999
    Date of Patent: October 31, 2000
    Inventors: Leonid S. Barabash, Aaron E. LaBarge
  • Patent number: 6046961
    Abstract: A sonar sensor array having a multi-layer tiling arrangement for the indiual elements that increases surface area available for each element while maintaining the inter-element spacing required to avoid spatial aliasing when the received signals are combined to form a sonar beam. The array comprises outer and inner arrays of transducer elements for converting an acoustic signal to an electrical response. The transducer elements of the outer array are positioned such than a grid of isolation spaces separates each of the transducer elements. The transducer elements of the inner array are also positioned such that a grid of isolation spaces separates each one of the transducer elements. The electrical response generated by the transducer elements of the inner and outer arrays are coupled to a beamformer which processes the responses to produce an output signal.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: April 4, 2000
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Maurice J. Griffin, Fred Nussbaum, Gerald T. Stevens
  • Patent number: 5787049
    Abstract: An acoustic imaging apparatus and method that achieves desired delays with coded signals. Linear, curved linear and sector scanning is provided in 1-D arrays and planar, curved planar and sector scanning is provided in 2-D arrays. Composite and non-linear implementations are presented. Dynamic and discrete dynamic focusing is disclosed for the relevant arrays. The 2-D array makes possible 3-D imaging.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: July 28, 1998
    Inventor: Kenneth N. Bates
  • Patent number: 5642329
    Abstract: A sonar array which has a resolving power which is double that of convental sonar arrays includes an array of hydrophones each having an acoustic center, a first projector positioned proximate a first endmost one of the hydrophones for launching a first sound signal during a first transmission time period, a second projector positioned proximate a second endmost one of the hydrophones for launching a second sound signal during a second transmission time period, wherein the hydrophones receive first echo signals and convert the first echo signals into first electrical echo signals during the first transmission time period, and receive second echo signals and convert the second echo signals into second electrical echo signals during the second transmission time period, and, a receiver for receiving and storing the first and second electrical echo signals, and for coherently summing the stored first and second electrical echo signals, to thereby produce a beam having a half-power beam width which is one-half tha
    Type: Grant
    Filed: October 3, 1995
    Date of Patent: June 24, 1997
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: William J. Zehner
  • Patent number: 5557583
    Abstract: A transducer capable of generating a phase-encoded wavefield is described. The encoded phase is related to the angular co-ordinates of direction of transmission. By decoding the phase values of the received wavefield, a direction can be obtained. Therefore, in navigation applications this transmitter gives additional location information not available from a single received signal using traditional methods such as "range-range" and "hyperbolic" systems. In its simplest configuration, the new transducer comprises two transducers which can be individually controlled. In more complex constructions use of more than two transducers increases the controllability of the desired phase characteristics of the resulting wavefield.
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: September 17, 1996
    Inventors: Stephen T. Ha, Norman S. Neidell
  • Patent number: 5548561
    Abstract: In a digital ultrasound imaging system, artifacts due to spurious ultrasound reflections from a highly reflective object outside the region of interest are reduced in magnitude by apparatus included in the beamforming system of the digital imaging system. A null is formed in a specified direction in the ultrasound beam patterns by perturbing the time delay on each receive channel. After estimating the direction of the highly reflective, interfering object and computing a time delay perturbation using a very fast algorithm, a null approximately 10 dB deep is introduced into each beam in the direction of the interfering object. This null reduces the magnitude of artifacts in the image, thereby providing image enhancement.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: August 20, 1996
    Assignee: General Electric Company
    Inventors: Moayyed A. Hussain, Kenneth W. Rigby, Koeunyi Bae
  • Patent number: 5540098
    Abstract: A transfer device an ultrasonic sensor having an oscillating section for oscillating an ultrasonic beam toward wafers which are horizontally arranged in a carrier and a receiving section for receiving a reflected ultrasonic wave, and driving mechanism for vertically moving the ultrasonic sensor relative to the carrier so as to sequentially radiate an ultrasonic beam to the end faces of the wafers. The presence/absence of a wafer and projection of the wafer in and from the carrier are detected based on the reflected wave received by the receiving section.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: July 30, 1996
    Assignees: Tokyo Electron Limited, Tokyo Electron Tohoku Limited
    Inventor: Tetsu Ohsawa
  • Patent number: 5537380
    Abstract: A sonar system includes an interactive sonar viewing apparatus for facilitating operator selection of a variety of features. The interactive sonar viewing apparatus can include a screen display for displaying a graphical representation of characterization data representative of the predetermined signal characteristics of each of the transducers. The characterization data can include data representative of the predetermined orientation and predetermined cone angle of each of the transducers. Based upon the graphical representation of the characterization data, the operator can select the specific transducers to be activated. Thus, the operator can selectively reconfigure the sonar system. Alternatively, the interactive sonar viewing apparatus can include a screen display which displays a graphical representation of orientation data representative of a number of display frames.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: July 16, 1996
    Assignee: Lowrance Electronics, Inc.
    Inventors: John W. Sprankle, Jr., Jeffrey M. McCollum
  • Patent number: 5301168
    Abstract: An ultrasonic transducer is provided which has multiple apertures in at least the elevation direction, and preferably in both the elevation and azimuth direction. Each aperture has a selected focal length, with the focal length increasing with the size of the aperture. By transmitting multiple scan lines at a given angle using the different apertures and line splicing received echo signals, resolution is enhanced by utilizing only the portion of each received scan line for which the corresponding elevation aperture is focused. While different controlled elevation apertures may be utilized for transmit and receive, the same aperture is preferably used for both. Additional techniques are discussed for both further enhancing resolution and for mitigating the decrease in frame rate which results from shooting multiple scan lines at a given angle.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: April 5, 1994
    Assignee: Hewlett-Packard Company
    Inventor: David G. Miller
  • Patent number: RE40456
    Abstract: An acoustic imaging apparatus and method that achieves desired delays with coded signals. Linear, curved linear and sector scanning is provided in 1-D arrays and planar, curved planar and sector scanning is provided in 2-D arrays. Composite and non-linear implementations are presented. Dynamic and discrete dynamic focusing is disclosed for the relevant arrays. The 2-D array makes possible 3-D imaging.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: August 12, 2008
    Inventor: Kenneth N. Bates