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    High dynamic range gyroscope
    12.
    发明授权
    High dynamic range gyroscope 有权

    公开(公告)号：US10697772B1

    公开(公告)日：2020-06-30

    申请号：US16277610

    申请日：2019-02-15

    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.

    High dynamic range gyroscope
    13.
    发明授权
    High dynamic range gyroscope 有权

    公开(公告)号：US10444014B1

    公开(公告)日：2019-10-15

    申请号：US15253694

    申请日：2016-08-31

    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: 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.

    FM demodulation system for quartz MEMS magnetometer
    15.
    发明授权
    FM demodulation system for quartz MEMS magnetometer 有权

    公开(公告)号：US10175307B1

    公开(公告)日：2019-01-08

    申请号：US14997203

    申请日：2016-01-15

    Applicant: HRL Laboratories, LLC

    Inventor： Logan D. Sorenson ,  Hung Nguyen ,  Raviv Perahia ,  David T. Chang ,  L. X. Coco Huang ,  Joshua A. Erbland

    IPC: G01R33/028 ,  G01R33/00

    Abstract: A magnetometer system has a magnetometer, an interface circuit and an electronic demodulator, the interface circuit being coupled to sense electrodes disposed on the magnetometer and the demodulator being coupled to the interface circuit. Preferably, the magnetometer has a loop electrode which follows an outline of the shape of an active portion of the magnetometer and wherein the electronic demodulator has an output for driving the loop electrode of the magnetometer. Preferably, the magnetometer includes a quartz plate with flexural and thickness shear vibratory modes and wherein the flexural vibratory mode is driven, in use, into vibration by the electronic demodulator and wherein the thickness shear vibratory mode is driven, in use, into vibration by the interface circuit.

    Vapor cells with transparent alkali source and/or sink
    16.
    发明授权
    Vapor cells with transparent alkali source and/or sink 有权

    公开(公告)号：US09763314B1

    公开(公告)日：2017-09-12

    申请号：US15203298

    申请日：2016-07-06

    Applicant: HRL Laboratories, LLC

    Inventor： Christopher S. Roper ,  Matthew T. Rakher ,  Logan D. Sorenson

    IPC: H05H3/02

    CPC classification number: H05H3/02 ,  G04F5/14

    Abstract: In some variations, a vapor-cell system comprises: a vapor-cell region configured to allow at least one vapor-cell optical path into a vapor phase within the vapor-cell region; a first electrode disposed in contact with the vapor-cell region; a second electrode that is electrically isolated from the first electrode; and a transparent ion-conducting layer interposed between the first electrode and the second electrode, wherein the transparent ion-conducting layer is optically transparent over a selected optical band of electromagnetic wavelengths. Some embodiments provide a magneto-optical trap or atomic-cloud imaging apparatus, comprising: the disclosed vapor-cell system; a source of laser beams configured to provide three orthogonal vapor-cell optical paths through the vapor-cell gas phase, to trap or image a population of cold atoms; and a magnetic-field source configured to generate magnetic fields within the vapor-cell region. Methods of use are also disclosed herein.

    Disk resonator gyroscope (DRG) with engineered radial stiffness for high anchor quality factor (Q)
    19.
    发明授权
    Disk resonator gyroscope (DRG) with engineered radial stiffness for high anchor quality factor (Q) 有权

    公开(公告)号：US11060865B1

    公开(公告)日：2021-07-13

    申请号：US16389462

    申请日：2019-04-19

    Applicant: HRL Laboratories, LLC

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

    IPC: G01C19/5712

    Abstract: Dimensions of a disk resonator gyroscope along the radial line of a resonator can be varied to engineer radial stiffness. An apparatus may comprise: a resonator comprising a plurality of concentric circumferential segments and a plurality of slots formed between the concentric circumferential segments; and at least one support supporting the resonator, wherein a width, in a radial direction, of each of the concentric circumferential segments is varied depending on a distance from the at least one support to the each of the concentric circumferential segments. The apparatus may further comprise radial segments connecting between the concentric circumferential segments. The concentric circumferential segments may have a ring shape.

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