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    SYSTEM AND METHOD FOR GENERATING OUTPUT OF A DOWNHOLE INERTIAL MEASUREMENT UNIT
    1.
    发明申请
    SYSTEM AND METHOD FOR GENERATING OUTPUT OF A DOWNHOLE INERTIAL MEASUREMENT UNIT 审中-公开

    公开(公告)号：US20180371894A1

    公开(公告)日：2018-12-27

    申请号：US16018695

    申请日：2018-06-26

    Applicant: HRL LABORATORIES, LLC

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

    IPC: E21B47/022 ,  E21B47/06 ,  E21B7/04 ,  E21B47/024

    Abstract: A method for generating an output of a downhole inertial measurement unit (IMU) includes: generating a trajectory between a plurality of survey points of a planned well data as a function of time, wherein the planned well data includes a plurality of three-dimensional coordinates corresponding to the survey points of an underground planned well are used to generate a trajectory comprising a plurality of trajectory coordinates between the consecutive ones of the survey points; generating sensor data for each of the trajectory coordinates as a function of time based on the geodetic reference parameters, the generated sensor data comprising: generated accelerometer output; generated gyroscopic output; and generated magnetometer output; and outputting the generated accelerometer output; the generated gyroscopic output; and the generated magnetometer output as a function of time as a generated output of the downhole IMU.

    Double-pulse technique for on-line diagnostics of electrochemical systems
    4.
    发明授权
    Double-pulse technique for on-line diagnostics of electrochemical systems 有权

    公开(公告)号：US10222426B2

    公开(公告)日：2019-03-05

    申请号：US14301334

    申请日：2014-06-11

    Applicant: HRL Laboratories, LLC

    Inventor： Shuoqin Wang ,  Luan D. Vu

    IPC: G01R31/36

    Abstract: A method for dynamic characterization of an electrochemical system (such as a lithium-ion battery) is provided, comprising exciting an electrochemical system with a plurality of double-pulse sequences, each comprising a constant-current discharge pulse, a constant-current charge pulse having the same pulse width and pulse amplitude, and a zero-current period between the pulses; and calculating an impulse response, using a recursive or matrix-based method, to dynamically characterize the electrochemical system. A constant state-of-charge is maintained in the electrochemical system. Therefore the signal-to-noise ratio is high due to the repetition of the driving sequence. This method may be employed for on-line determination of the impedance spectrum of an electrochemical system, since the cycling profile can be easily integrated into charge/discharge profiles. Batteries (and other devices) can be diagnosed at high speed and with high accuracy. The double-pulse sequence is robust for fairly noisy systems.

    Methods for on-line, high-accuracy estimation of battery state of power
    5.
    发明授权
    Methods for on-line, high-accuracy estimation of battery state of power 有权

    公开(公告)号：US09989595B1

    公开(公告)日：2018-06-05

    申请号：US14586828

    申请日：2014-12-30

    Applicant: HRL Laboratories, LLC

    Inventor： Shuoqin Wang ,  Luan D. Vu ,  Qin Jiang

    IPC: G01R31/36

    CPC classification number: G01R31/3648 ,  G01R31/3606

    Abstract: Some variations provide a method for real-time estimation of state of charge and state of power of a battery, comprising: (a) cycling a battery with a driving profile; (b) utilizing a recursive algorithm that relates battery terminal voltage to battery current, wherein the algorithm includes open-circuit voltage and a finite-impulse-response filter to dynamically model kinetic voltage; measuring the battery terminal voltage and the battery current at least at a first time and a second time during cycling; calculating battery open-circuit voltage and finite-impulse-response filter parameters; calculating battery state of charge based on the open-circuit voltage; and calculating battery state of power based on the open-circuit voltage and the finite-impulse-response filter parameters. An extended Kalman filtering technique is incorporated for real-time updating of FIR model parameters. Only a single FIR filter is necessary, making these methods applicable for battery-powered systems with limited computing and storage capabilities.

    Methods and apparatus for sensing the internal temperature of an electrochemical device
    6.
    发明授权
    Methods and apparatus for sensing the internal temperature of an electrochemical device 有权

    公开(公告)号：US09880061B2

    公开(公告)日：2018-01-30

    申请号：US14303132

    申请日：2014-06-12

    Applicant: HRL Laboratories, LLC

    Inventor： John Wang ,  Shuoqin Wang ,  Souren Soukiazian ,  Jason A. Graetz

    IPC: G01R21/00 ,  G01K13/00 ,  G01R31/36 ,  G01K7/42

    CPC classification number: G01K13/00 ,  G01K7/427 ,  G01R31/3606 ,  G01R31/3624 ,  G01R31/3651 ,  G01R31/3662 ,  G01R31/3675

    Abstract: The internal temperature of an electrochemical device may be probed without a thermocouple, infrared detector, or other auxiliary device to measure temperature. Some methods include exciting an electrochemical device with a driving profile; acquiring voltage and current data from the electrochemical device, in response to the driving profile; calculating an impulse response from the current and voltage data; calculating an impedance spectrum of the electrochemical device from the impulse response; calculating a state-of-charge of the electrochemical device; and then estimating internal temperature of the electrochemical device based on a temperature-impedance-state-of-charge relationship. The electrochemical device may be a battery, fuel cell, electrolytic cell, or capacitor, for example. The procedure is useful for on-line applications which benefit from real-time temperature sensing capabilities during operations. These methods may be readily implemented as part of a device management and safety system.

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