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    EXTENDED KALMAN FILTER BASED AUTONOMOUS MAGNETOMETER CALIBRATION
    2.
    发明公开
    EXTENDED KALMAN FILTER BASED AUTONOMOUS MAGNETOMETER CALIBRATION 审中-公开
    基于扩展卡尔曼滤波的自主磁测仪校准

    公开(公告)号：EP3218674A1

    公开(公告)日：2017-09-20

    申请号：EP14906042.8

    申请日：2014-11-11

    申请人： Intel Corporation

    发明人： HAN, Ke ,  HAN, He ,  WANG, Zhifeng ,  XU, Feng

    IPC分类号： G01C25/00 ,  G01R33/00

    CPC分类号： G01C17/38 ,  G01C19/56 ,  G01C25/005 ,  G01R33/00 ,  G01R33/0035 ,  G01R33/022 ,  G01R33/028

    摘要： Systems and methods may provide for obtaining first sensor data associated with a gyroscope and obtaining second sensor data associated with a magnetometer. Additionally, the first sensor data, the second sensor data and an extended Kalman filter may be used to calibrate the magnetometer. In one example, a sampling rate of the magnetometer is increased before obtaining the second sensor data and the sampling rate of the magnetometer is decreased after calibration of the magnetometer.

    摘要翻译： 系统和方法可以提供用于获得与陀螺仪（22）相关联的第一传感器数据并且获得与磁力计（10）相关联的第二传感器数据。 此外，第一传感器数据，第二传感器数据和扩展卡尔曼滤波器可用于校准磁力计（10）。 在一个示例中，在获得第二传感器数据之前增加磁力计（10）的采样率，并且在磁力计（10）的校准之后减小磁力计（10）的采样率。

    System and method for magnetometer calibration and compensation
    7.
    发明公开
    System and method for magnetometer calibration and compensation 审中-公开
    系统和方法校准和补偿磁力

    公开(公告)号：EP2843434A3

    公开(公告)日：2015-09-16

    申请号：EP14173999.5

    申请日：2014-06-25

    申请人： Honeywell International Inc.

    发明人： Elgersma, Michael Ray ,  Bageshwar, Vibhor L. ,  Kreichauf, Ruth Dagmar

    IPC分类号： G01R33/028 ,  G01R33/00 ,  G01C21/16 ,  G01R33/02 ,  G01R35/00

    CPC分类号： G01R35/005 ,  G01C17/38 ,  G01C21/165 ,  G01R33/0035 ,  G01R33/02 ,  G01R33/028

    摘要： A system comprises an inertial measurement unit comprising one or more gyroscopes configured to measure angular velocity about a respective one of three independent axes and one or more accelerometers configured to measure specific force along a respective one of the three independent axes; a magnetometer configured to measure strength of a local magnetic field along each of the three independent axes; and a processing device coupled to the inertial measurement unit and the magnetometer; the processing device configured to compute kinematic state data for the system based on measurements received from the magnetometer and the inertial measurement unit. The processing device is further configured to calculate magnetometer measurement calibration parameters using a first technique when position data is unavailable and to calculate magnetometer measurement calibration parameters using a second technique when position data is available.

    SYSTEM FOR MEASURING THE CONCENTRATION OF MAGNETIC BALLAST IN A SLURRY
    8.
    发明公开
    SYSTEM FOR MEASURING THE CONCENTRATION OF MAGNETIC BALLAST IN A SLURRY 审中-公开
    系统ZUR MESSUNG DER KONZENTRATION EINER MAGNETISCHEN VORSCHALTVORRICHTUNG IN EINER SUSPENSION

    公开(公告)号：EP2900352A1

    公开(公告)日：2015-08-05

    申请号：EP13841289.5

    申请日：2013-09-26

    申请人： Evoqua Water Technologies LLC

    发明人： FEDERICO, Frank, W. ,  KLYAMKIN, Simone ,  MCKEAN, Colin ,  WOODARD, Steven, E.

    IPC分类号： B01D35/06

    CPC分类号： G01N27/74 ,  B01D21/0009 ,  C02F1/488 ,  C02F2001/007 ,  G01N33/18 ,  G01R33/028

    摘要： A system and method for measuring the concentration of magnetic ballast in a slurry to be analyzed is provided. A detection conduit is provided and configured to receive a slurry to be analyzed. The detection conduit may be surrounded by a set of detection coaxial coils. A reference set of two coaxial coils is also provided. A power source is provided for establishing an electrical current. A measurement subsystem for measuring the differential induced voltage between detection and reference coils is provided to determine the concentration of the magnetic ballast in the slurry.

    摘要翻译： 提供了一种用于测量要分析的浆料中的电子镇流器的浓度的系统和方法。 提供并配置检测导管以接收待分析的浆料。 检测导管可以被一组检测同轴线圈包围。 还提供了一组两个同轴线圈。 提供用于建立电流的电源。 提供用于测量检测和参考线圈之间的差分感应电压的测量子系统，以确定浆料中的电子镇流器的浓度。

    System and Method for Performing a Background Calibration for a Magnetometer
    10.
    发明公开
    System and Method for Performing a Background Calibration for a Magnetometer 审中-公开
    系统和方法，用于执行Hintergrundskalbrierung磁力

    公开(公告)号：EP2447670A3

    公开(公告)日：2014-12-17

    申请号：EP11181845.6

    申请日：2011-09-19

    申请人： BlackBerry Limited

    发明人： Snow, Christopher Harris ,  Almalki, Nazih ,  Simmons, Sean Bartholomew

    IPC分类号： G01C17/38

    CPC分类号： G01C17/38 ,  G01R33/0035 ,  G01R33/028 ,  H04M1/24 ,  H04M2250/12

    摘要： A method and system are provided for performing a background calibration of a magnetometer. The method comprises obtaining a plurality of magnetometer readings; applying an active set of calibration parameters to the plurality of magnetometer readings to obtain a plurality of values; applying a new set of calibration parameters to the plurality of magnetometer readings to obtain a plurality of further values; applying an active set of calibration parameters to the plurality of magnetometer readings to obtain a plurality of further values; and replacing the active set of calibration parameters with the new set of calibration parameters when a quality of the plurality of values is higher than a quality of the further values.