公开(公告)号：US11561095B2

公开(公告)日：2023-01-24

申请号：US16847248

申请日：2020-04-13

Applicant: HRL Laboratories, LLC

Inventor： Lian X. Huang ,  Logan Sorenson ,  Raviv Perahia ,  Hung Nguyen ,  David T. Chang

IPC: B81C1/00 ,  H01L41/00 ,  G01C19/5712 ,  G01C19/5684 ,  G01C19/5677

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.

公开(公告)号：US11509277B2

公开(公告)日：2022-11-22

申请号：US16368802

申请日：2019-03-28

Applicant: HRL Laboratories, LLC

Inventor： Raviv Perahia ,  Logan D. Sorenson ,  Lian X. Huang ,  Jeremy Bregman

IPC: H03H3/02 ,  H03H9/205 ,  H03H9/02 ,  H03H9/05 ,  H03H9/13 ,  H03H9/17 ,  H03H9/15

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.

公开(公告)号：US11493534B1

公开(公告)日：2022-11-08

申请号：US16673878

申请日：2019-11-04

Applicant: HRL Laboratories, LLC

Inventor： Logan D. Sorenson ,  Lian X. Huang ,  Matthew J. Pelliccione ,  Raviv Perahia ,  Hung Nguyen ,  David T. Chang

IPC: G01P21/00 ,  B81B3/00 ,  G01P15/08

Abstract: A self-calibration method for an accelerometer having a proof mass separated by a gap from a drive electrode and a sense electrode includes initializing the accelerometer to resonate, applying a first bias voltage to the sense electrode and a second bias voltage to the drive electrode to obtain a first scale factor, measuring a first acceleration over a first time interval, swapping the first bias voltage on the sense electrode with the second bias voltage previously on the drive electrode and the second bias voltage on the drive electrode with the first bias voltage previously on the sense electrode so that a bias voltage on the sense electrode is set to the second bias voltage and a bias voltage on the drive electrode is set to the second bias voltage to obtain a second scale factor, measuring a second acceleration over a second time interval, and calculating a true acceleration.

公开(公告)号：US11299981B2

公开(公告)日：2022-04-12

申请号：US16208449

申请日：2018-12-03

Applicant: HRL Laboratories, LLC

Inventor： Hung Nguyen ,  Logan D. Sorenson ,  David L. Walter ,  Adour V. Kabakian ,  Raviv Perahia ,  Shuoqin Wang ,  David W. Shahan ,  Lian X. Huang ,  David T. Chang

IPC: E21B47/09 ,  E21B41/00 ,  G01P15/105 ,  G01P15/14 ,  G01C1/00 ,  G01C19/00 ,  E21B47/024 ,  E21B47/022 ,  G01P15/18

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.

公开(公告)号：US09991868B1

公开(公告)日：2018-06-05

申请号：US14686567

申请日：2015-04-14

Applicant: HRL Laboratories, LLC

Inventor： Hung Nguyen ,  Raviv Perahia ,  Lian X. Huang ,  Srikanth Iyer

IPC: H03H9/02 ,  H03H9/24 ,  H03H3/007

CPC classification number: H03H9/02259 ,  B81B2207/094 ,  H03H3/0072 ,  H03H9/2426 ,  H03H9/2463

Abstract: A micro-resonator employs a lid-integrated electrode to one or more of drive, sense and tune a vibrational resonant mode of a microelectromechanical systems (MEMS) resonator. The micro-resonator includes a lid attached to a base that provides a resonator cavity. The micro-resonator further includes the MEMS resonator extending from a surface of the base toward the lid within the resonator cavity. The lid-integrated electrode extends vertically from the lid into the resonator cavity toward the base. The vertically extending, lid-integrated electrode is positioned spaced from and adjacent to a side of the MEMS resonator to one or more of drive, sense and tune mechanical movement of the MEMS resonator.

公开(公告)号：US11469732B2

公开(公告)日：2022-10-11

申请号：US16368737

申请日：2019-03-28

Applicant: HRL Laboratories, LLC

Inventor： Raviv Perahia ,  Logan D. Sorenson ,  Lian X. Huang ,  David T. Chang ,  Makena S. White ,  Jeremy Bregman

IPC: H03H3/02 ,  H03H9/205 ,  H03H9/02 ,  H03H9/05 ,  H03H9/13 ,  H03H9/17 ,  H03H9/15

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.

公开(公告)号：US11275099B1

公开(公告)日：2022-03-15

申请号：US16512091

申请日：2019-07-15

Applicant: HRL Laboratories, LLC

Inventor： Logan D. Sorenson ,  Lian X. Huang ,  Raviv Perahia ,  Hung Nguyen ,  David T. Chang

IPC: G01P15/18 ,  G01P15/13 ,  G01P1/02

Abstract: A resonant accelerometer includes a proof mass, one or more springs connecting the proof mass to an anchor, and one or more capacitive transduction gaps providing a void or space between the movable proof mass and a corresponding fixed electrode, wherein the static displacement of the proof mass in response to acceleration applied to the anchor modifies the electrostatic stiffness imparted by one or more of the capacitive transduction gaps on the proof mass, resulting in a corresponding change in the resonance frequency of the resonant accelerometer.

公开(公告)号：US10281277B1

公开(公告)日：2019-05-07

申请号：US15347748

申请日：2016-11-09

Applicant: HRL Laboratories, LLC

Inventor： Raviv Perahia ,  Logan D. Sorenson ,  Lian X. Huang ,  Hung Nguyen ,  David T. Chang ,  Deborah J. Kirby

IPC: G01C19/58 ,  G01C19/64 ,  G01C19/5698 ,  G10K11/20

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.

公开(公告)号：US20190049246A1

公开(公告)日：2019-02-14

申请号：US16004310

申请日：2018-06-08

Applicant: HRL Laboratories, LLC

Inventor： Logan D. SORENSON ,  Hung Nguyen ,  Raviv PERAHIA ,  Lian X. Huang ,  David T. CHANG

IPC: G01C19/5684 ,  G01C19/5712

CPC classification number: G01C19/5684 ,  G01C19/025 ,  G01C19/5712

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.

公开(公告)号：US11244667B1

公开(公告)日：2022-02-08

申请号：US16258439

申请日：2019-01-25

Applicant: HRL Laboratories, LLC

Inventor： Raviv Perahia ,  Jeremy Bregman ,  Amit M. Patel ,  Sean M. Meenehan ,  Lian X. Huang ,  Logan D. Sorenson

IPC: G10K11/28 ,  B06B3/04

Abstract: A curved phononic waveguide. In some embodiments, the curved phononic waveguide includes a sheet including a plurality of standard reflectors and a plurality of divergent reflectors. Each of the standard reflectors is associated with a respective grid point of a grid defined by a plurality of intersecting lines, each grid point being a respective intersection of two of a plurality of intersecting lines, the grid being locally periodic to within 5%, and having a local grid spacing. Each of the standard reflectors has a center separated from the respective grid point of the standard reflector by at most 1% of the grid spacing. The divergent reflectors define a waveguide among the standard reflectors, each of the divergent reflectors being an absent reflector or a reflector that is smaller than one of the standard reflectors.