Patents by Inventor Raviv Perahia

Raviv Perahia has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10718198
    Abstract: Described is a system for estimating a trajectory of a borehole. The system processes signals of sensor streams obtained from an inertial sensor system. Using the set of processed signals, the system determines whether a drill is in a survey mode state or a continuous mode state, and a measured depth of the borehole is determined. A set of survey mode positioning algorithms is applied when the drill is stationary. A set of continuous mode navigation algorithms is applied when the drill is non-stationary. Using at least one Kalman filter, results of the set of survey mode positioning algorithms and the set of continuous mode navigation algorithms are combined. An estimate of a borehole trajectory and corresponding ellipse of uncertainty (EOU) is generated using the combined results.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: July 21, 2020
    Assignee: HRL Laboratories, LLC
    Inventors: Logan D. Sorenson, Shuoqin Wang, David L. Walter, Adour V. Kabakian, Keerti S. Kona, Hung Nguyen, Raviv Perahia, David Chang
  • Patent number: 10697772
    Abstract: A sensor includes an acceleration or magnetic field sensitive microelectromechanical systems (MEMS) resonator, configured to oscillate in at least a first normal mode and a second normal mode. The sensor further includes: a coarse readout circuit configured to drive the first normal mode, measure a motion of the first normal mode, and derive from the measured motion a coarse measurement of the true acceleration or true external magnetic field; and a fine readout circuit configured to drive the second normal mode, measure a motion of the second normal mode, and derive from the measured motion and the coarse measurement a measurement of the difference between the true acceleration or true external magnetic field and the coarse measurement.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: June 30, 2020
    Assignee: HRL Laboratories, LLC
    Inventors: Logan D. Sorenson, Raviv Perahia, David T. Chang, Randall L. Kubena, Deborah J. Kirby, Hung Nguyen, Richard J. Joyce
  • Patent number: 10696546
    Abstract: An auxetic interposer includes: a frame enclosing an interior space; a pad arranged within the interior space; and a plurality of micro auxetic lattices extending between the frame and the pad.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: June 30, 2020
    Assignee: HRL Laboratories, LLC
    Inventors: Raviv Perahia, David W. Shahan, Christopher P. Henry, Hung Nguyen, Logan D. Sorenson
  • Patent number: 10655964
    Abstract: A resonator includes an anchor, an outer stiffener ring on an outer perimeter of the resonator, and a plurality of curved springs between the anchor and the outer stiffener ring.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: May 19, 2020
    Assignee: HRL Laboratories, LLC
    Inventors: Lian X. Huang, Logan D. Sorenson, Raviv Perahia, Hung Nguyen, David T. Chang
  • Patent number: 10571267
    Abstract: An angular rate sensor. The sensor includes a Coriolis vibratory gyroscope (CVG) resonator, configured to oscillate in a first normal mode and in a second normal mode; a frequency reference configured to generate a reference signal; and a first phase control circuit. The first phase control circuit is configured to: measure a first phase difference between: a first phase target, and the difference between: a phase of an oscillation of the first normal mode and a phase of the reference signal. The first phase control circuit is further configured to apply a first phase correction signal to the CVG resonator, to reduce the first phase difference. A second phase control circuit is similarly configured to apply a second phase correction signal to the CVG resonator, to reduce a corresponding, second phase difference.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: February 25, 2020
    Assignee: HRL Laboratories, LLC
    Inventors: Logan D. Sorenson, Raviv Perahia, David T. Chang, Randall L. Kubena, Deborah J. Kirby, Hung Nguyen, Richard J. Joyce
  • Patent number: 10514261
    Abstract: A geopositioning system. The geopositioning system includes an accelerometer including three sensing axes, a gyroscope including three sensing axes, and a magnetometer including three sensing axes, and a processing circuit. The processing circuit is configured to calculate a location of the geopositioning system as a latitude, longitude, and altitude with respect to the Earth.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: December 24, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Logan D. Sorenson, Hung Nguyen, Raviv Perahia, Deborah J. Kirby, Richard J. Joyce, David T. Chang
  • Publication number: 20190315621
    Abstract: A device preferably for use in an inertial navigation system the device having a single IC wafer; a plurality of sensors bonded to bond regions on said single IC wafer, at least one of said bond regions including an opening therein in gaseous communication with a pressure chamber associated with at least one of the plurality of said sensors; and a plurality of caps encapsulating said plurality of sensors, at least one of said plurality of caps forming at least a portion of said pressure chamber. A method of making the device is also disclosed.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 17, 2019
    Applicant: HRL Laboratories, LLC
    Inventors: Deborah J. KIRBY, Raviv PERAHIA, Hung NGUYEN, Frederic P. STRATTON, David T. CHANG
  • Patent number: 10444014
    Abstract: An angular sensor. The angular sensor includes a Coriolis vibratory gyroscope (CVG) resonator, configured to oscillate in a first pair of normal modes including a first normal mode and a second normal mode and a second pair of normal modes including a third normal mode and a fourth normal mode. The angular sensor further includes a coarse readout circuit configured to drive the first pair of modes, measure the motion of the first pair of modes, and derive from the measured motion of the first pair of modes a coarse measurement of an angular rate of the resonator. The angular sensor further includes and a fine readout circuit configured to derive a measurement of the difference between the true angular rate of the resonator and the coarse measurement.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: October 15, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Logan D. Sorenson, Raviv Perahia, David T. Chang, Randall L. Kubena, Deborah J. Kirby, Hung Nguyen, Richard J. Joyce
  • Patent number: 10436587
    Abstract: An angular sensor, comprising a Coriolis vibratory gyroscope (CVG) resonator, capable of oscillating along a first pair of normal n=1 modes comprising a first normal mode and a second normal mode; and a second pair of normal n=2 modes comprising a third normal mode and a fourth normal mode; the sensor further comprising one drive electrode and one sense electrode aligned along an anti-nodal axis of each mode; and a pair of bias tune electrodes aligned with an anti-nodal axis of each mode if no drive and sense electrode pair is aligned with said anti-nodal axis.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: October 8, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Logan D. Sorenson, Hung Nguyen, Raviv Perahia, Lian X. Huang, David T. Chang
  • Publication number: 20190305749
    Abstract: A resonator has a resonator body and a frame at least partially surrounding the resonator body, the resonator body being coupled to the frame by at least one tether. The resonator body, frame and at least one tether comprise silicon carbide. A plurality of interdigitated electrodes are disposed on the silicon carbide resonator body. The resonator body preferably comprises 6H silicon carbide and preferably has a crystalline c-axis oriented generally parallel to a thickness direction of the resonator body.
    Type: Application
    Filed: March 28, 2019
    Publication date: October 3, 2019
    Applicant: HRL Laboratories, LLC
    Inventors: Raviv PERAHIA, Logan D. Sorenson, Lian X. Huang, Jeremy Bregman
  • Publication number: 20190305744
    Abstract: A method of making a SiC resonator includes forming a layer of an oxide material on a relatively thick wafer of SiC; bonding the layer of oxide material on the relatively thick wafer of SiC to a handle wafer having at least an oxide exterior surface, the resulting bond being substantially free of voids; planarizing the relatively thick wafer of SiC to a desired thickness; forming top and bottom electrodes on the wafer of SiC wafer to define a SiC wafer resonator portion; and forming a trench around the top and bottom electrodes, the tench completely penetrating the planarized wafer of SiC around a majority of a distance surrounding said top and bottom electrodes, except for one or more tether regions of the planarized wafer of SiC which remain physically coupled a remaining portion the SiC wafer resonator portion which defines a frame formed of the planarized wafer of SiC surrounding the SiC wafer resonator portion.
    Type: Application
    Filed: March 28, 2019
    Publication date: October 3, 2019
    Inventors: Raviv PERAHIA, Logan D. SORENSON, Lian X. HUANG, David T. CHANG, Makena S. WHITE, Jeremy BREGMAN
  • Patent number: 10422641
    Abstract: A gyroscope includes a cylindrical shell having a first end and a second end, a pedestal, a plurality of spokes coupled from the pedestal to the second end of the cylindrical shell, and a plurality of tuning tabs extending from one or more of the plurality of spokes.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: September 24, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Raviv Perahia, Deborah J. Kirby, Logan D. Sorenson, Richard J. Joyce
  • Patent number: 10408622
    Abstract: Described is a system for incremental trajectory estimation of an implement. During operation, the system determines a time span of each stationary period of the implement based on accelerometer and gyroscopic data. Gyroscopic bias is then estimated based on the time span and gyroscopic data. An attitude of the implement is then estimated at each time step based on the estimated gyroscopic bias and gyroscopic data. Further, a traveling distance of the implement is estimated. Finally, a trajectory of the implement is estimated based on the estimated attitude and traveling distance. Given the trajectory estimate, an implement (e.g., drilling platform, vehicle, etc.) can be caused to alter its direction based on the trajectory estimate.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: September 10, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Shuoqin Wang, Logan D. Sorenson, Hung Nguyen, David Chang, Raviv Perahia
  • Patent number: 10329897
    Abstract: Described is a system for estimating measured depth of a borehole. The system comprises a drilling fluid pulse telemetry system positioned in a borehole and processors connected with the drilling fluid pulse telemetry system. Time series measures are obtained from an environmental sensor package. Initial estimates of a time delay and path attenuation amplitude are determined. An error for the initial estimates is determined, and iterative minimization of the error is performed until source signal parameters converge, resulting in a least squares estimate of the source signal and the reflected signals. The least squares estimate is used to obtain time delay values, which are then used to continuously generate an estimate of a measured depth of the borehole.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: June 25, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Keerti S. Kona, Logan D. Sorenson, Raviv Perahia, Hung Nguyen, David Chang
  • Publication number: 20190169979
    Abstract: An instrument package for use during the drilling a wellbore. The instrument package includes a plurality of instruments such as accelerometers, gyroscopes, and magnetometers; a computer is configured to determine the current position of the plurality of instruments from a set of measurements produced by the plurality of instruments; and wherein the plurality of instruments are mechanically isolated from a drill head assembly by one or more multi-degree of freedom vibration isolators. The computer preferably has at least two modes different analytical modes of analyzing the set of measurements produced by the plurality of instruments, including a continuous mode and a survey mode, the continuous mode being operational during times that active drilling is occurring and the survey mode being operational during times that the active drilling is not occurring.
    Type: Application
    Filed: December 3, 2018
    Publication date: June 6, 2019
    Applicant: HRL Laboratories, LLC
    Inventors: Hung NGUYEN, Logan D. Sorenson, David L. Walter, Adour V. Kabakian, Raviv Perahia, Shuoqin Wang, David W. Shahan, Lian X. Huang, David T. Chang
  • Patent number: 10308505
    Abstract: A device preferably for use in an inertial navigation system the device having a single IC wafer; a plurality of sensors bonded to bond regions on said single IC wafer, at least one of said bond regions including an opening therein in gaseous communication with a pressure chamber associated with at least one of the plurality of said sensors; and a plurality of caps encapsulating said plurality of sensors, at least one of said plurality of caps forming at least a portion of said pressure chamber. A method of making the device is also disclosed.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: June 4, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Deborah J. Kirby, Raviv Perahia, Hung Nguyen, Frederic P. Stratton, David T. Chang
  • Patent number: 10281277
    Abstract: A phononic travelling wave gyroscope. The gyroscope includes a phononic waveguide including at least one loop. The phase change incurred by phonons propagating around the loop is compared to a reference phase, and utilized to form an estimate of the rotational rate of the gyroscope.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: May 7, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Raviv Perahia, Logan D. Sorenson, Lian X. Huang, Hung Nguyen, David T. Chang, Deborah J. Kirby
  • Patent number: 10240925
    Abstract: A gyroscope includes a vibratory structure, and a control mechanism including at least a first electrode, and at least a second electrode adjacent the first electrode, wherein the vibratory structure is separated from the control mechanism by a gap, wherein to drive a vibration in the vibratory structure, the control mechanism is configured to apply an alternating electrical voltage between the first electrode and the second electrode, and wherein to sense motion in the vibratory structure, the control mechanism is configured to apply a direct current voltage bias between the first electrode and the second electrode.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: March 26, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Raviv Perahia, Jonathan Lake, Richard J. Joyce, Logan D. Sorenson
  • Patent number: 10236858
    Abstract: An electromechanical resonator including a drive electrode set having at least one pair of alternating pole interdigitated drive electrodes and including a sense electrode set having at least one pair of alternating pole interdigitated sense electrodes.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: March 19, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Logan Sorenson, Raviv Perahia, Hung Nguyen, David Chang
  • Publication number: 20190072388
    Abstract: A resonant structure comprising at least two coaxial rings, wherein adjacent coaxial rings have adjacent peripheries and are attached together by a plurality of connection structures regularly arranged along said adjacent peripheries; and wherein a first ring has a first ring portion with a first radial thickness and a second ring, portion, in a vicinity of a first connection structure, with a second radial thickness smaller than said first radial thickness.
    Type: Application
    Filed: August 13, 2018
    Publication date: March 7, 2019
    Applicant: HRL Laboratories, LLC
    Inventors: Lian X. HUANG, Logan D. SORENSON, Chia-Ming "Gavin" CHANG, Raviv PERAHIA, Hung NGUYEN, David T. CHANG