公开(公告)号：US11835339B1

公开(公告)日：2023-12-05

申请号：US17713789

申请日：2022-04-05

Applicant: HRL Laboratories, LLC

Inventor： Logan Sorenson ,  David Chang ,  Hung Nguyen ,  Matthew Pelliccione ,  Raviv Perahia

IPC: G01C19/5776

CPC classification number: G01C19/5776

Abstract: A CVG having first and second degenerate resonator modes with each a damping rate; drive circuits for causing the resonator to oscillate in the first and second modes in response to first and second drive signals; first and second sense circuits for generating first and second sense signals in response to the resonator oscillating in the first and second modes; a signal processing circuit having control loops for generating the first and second drive signals based on the first and second sense signals; and first and second damping feedback circuits for generating first and second damping feedback signals proportional to the first and second damping rates; an adding the damping feedback signals to the first and second drive signals.

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：US11117800B2

公开(公告)日：2021-09-14

申请号：US16376970

申请日：2019-04-05

Applicant: HRL Laboratories, LLC

Inventor： Deborah J. Kirby ,  Raviv Perahia ,  Hung Nguyen ,  Frederic P. Stratton ,  David T. Chang

IPC: B81B3/00 ,  B81C1/00 ,  G01C19/5783 ,  G01C21/18

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.

公开(公告)号：US11101786B1

公开(公告)日：2021-08-24

申请号：US15899122

申请日：2018-02-19

Applicant: HRL Laboratories, LLC

Inventor： Randall L. Kubena ,  Deborah J. Kirby ,  Hung Nguyen ,  David T. Chang

IPC: H03H9/19 ,  H03H9/02 ,  H01L21/311 ,  B81C1/00 ,  H03H3/007

Abstract: A MEMS resonator comprising a baseplate wafer; a piezoelectric HF-VHF resonator that comprises a monolithic piezoelectric member having at least two separate spring piezoelectric support members integrally extending therefrom, each spring piezoelectric support member having at least a rounded corner; said piezoelectric resonator being attached to the baseplate wafer by said support members; wherein said monolithic piezoelectric member comprises first and second main surfaces joined by side edges; at least one of said side edges forming an angle of between 90 and 105 degrees with one of the first and second main surfaces.

公开(公告)号：US10914585B1

公开(公告)日：2021-02-09

申请号：US16871497

申请日：2020-05-11

Applicant: HRL LABORATORIES, LLC

Inventor： Logan D. Sorenson ,  Raviv Perahia ,  David T. Chang ,  Randall L. Kubena ,  Deborah J. Kirby ,  Hung Nguyen ,  Richard J. Joyce

IPC: G01C19/5726 ,  G01C19/5755

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.

公开(公告)号：US20180149480A1

公开(公告)日：2018-05-31

申请号：US15825067

申请日：2017-11-28

Applicant: HRL Laboratories, LLC

Inventor： Shuoqin Wang ,  Logan D. Sorenson ,  Hung Nguyen ,  David Chang ,  Raviv Perahia

IPC: G01C21/18 ,  G01C21/16 ,  G01C21/20 ,  G01C21/08 ,  E21B44/00

CPC classification number: G01C21/18 ,  E21B7/04 ,  E21B44/005 ,  E21B47/09 ,  G01C21/08 ,  G01C21/165 ,  G01C21/20

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.

公开(公告)号：US20180080310A1

公开(公告)日：2018-03-22

申请号：US15823489

申请日：2017-11-27

Applicant: HRL Laboratories, LLC

Inventor： Logan D. Sorenson ,  Shuoqin Wang ,  David L. Walter ,  Adour V. Kabakian ,  Keerti S. Kona ,  Hung Nguyen ,  Raviv Perahia ,  David Chang

IPC: E21B44/00 ,  E21B47/022 ,  E21B47/04

CPC classification number: E21B44/005 ,  E21B41/0092 ,  E21B47/022 ,  E21B47/04 ,  G01C21/16 ,  G01R33/0206

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.

公开(公告)号：US20170292840A1

公开(公告)日：2017-10-12

申请号：US15387435

申请日：2016-12-21

Applicant: HRL Laboratories, LLC

Inventor： Logan D. Sorenson ,  Hung Nguyen ,  Raviv Perahia ,  Deborah J. Kirby ,  Richard J. Joyce ,  David T. Chang

IPC: G01C21/08 ,  G01R33/02 ,  G01P15/18 ,  G01V7/06

CPC classification number: G01C21/08 ,  G01R33/0206 ,  G01V7/00

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.

公开(公告)号：US09599470B1

公开(公告)日：2017-03-21

申请号：US14024506

申请日：2013-09-11

Applicant: HRL LABORATORIES, LLC

Inventor： Deborah J. Kirby ,  Raviv Perahia ,  Hung Nguyen ,  David T. Chang ,  Tracy J. Boden

IPC: G01C19/56 ,  G01C19/5691 ,  G01C25/00

CPC classification number: G01C19/5691 ,  G01C25/00

Abstract: A gyroscope includes a cylindrical shell having a first end and a second end, a base on the second end of the shell, a substrate, an anchor coupling the base to the substrate, and electrodes for driving and sensing mechanically separated from the cylindrical shell.

公开(公告)号：US09061886B1

公开(公告)日：2015-06-23

申请号：US13840160

申请日：2013-03-15

Applicant: HRL LABORATORIES, LLC

Inventor： Hung Nguyen ,  Deborah J. Kirby ,  David T. Chang

IPC: H03H9/00 ,  B81B3/00 ,  B81C1/00

CPC classification number: B81B3/0021 ,  B81B3/0072 ,  B81B2203/0154 ,  B81B2203/0163 ,  B81B2203/0307 ,  B81C1/0015 ,  H03H3/02 ,  H03H9/19 ,  H03H2003/027

Abstract: A resonator includes a base substrate with anchor pads, and a quartz resonator device including a resonant microbridge with an electrode, a first flexure beam connected to an end of the microbridge, a second flexure beam connected to a second end of the microbridge, a first and second spring connected between the first flexure beam and first and second anchor mounts, respectively, a third and fourth spring connected between the second flexure beam and third and fourth anchor mounts, respectively, the anchor mounts connected to anchor pads on the base substrate. A single crystal quartz includes the microbridge, the flexure beams, the springs, and the anchor mounts. The flexure beams and the springs prevent buildup of stress in the microbridge.

Abstract translation: 谐振器包括具有锚定垫的基底衬底和包括具有电极的谐振微桥的石英谐振器装置，连接到微桥的端部的第一挠曲梁，连接到微桥的第二端的第二挠曲梁，第一 以及第二弹簧，分别连接在第一弯曲梁和第一和第二锚定安装件之间，第三和第四弹簧分别连接在第二弯曲梁和第三和第四锚固装置之间，锚固装置分别连接到基底基板上的锚定垫。 单晶石英包括微桥，挠曲梁，弹簧和锚固安装座。 弯曲梁和弹簧防止在微桥中产生应力。