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    METHOD AND APPARATUS FOR CALIBRATING A MEASUREMENT DEVICE
    4.
    发明公开
    METHOD AND APPARATUS FOR CALIBRATING A MEASUREMENT DEVICE 审中-实审

    公开(公告)号：EP4390434A2

    公开(公告)日：2024-06-26

    申请号：EP24174552.0

    申请日：2021-04-01

    申请人： Solaredge Technologies Ltd.

    发明人： BRAGINSKY, David ,  YAIRI, Dor ,  YOSCOVICH, Ilan

    IPC分类号： G01R35/00

    CPC分类号： G01R35/005 ,  G01R1/22 ,  G01R15/186

    摘要： Systems, apparatuses, and methods are described for calibration of a current transformer. In some examples, one or more electrical elements may be affected in order to set a calibration of the current transformer. A calibration circuit of the current transformer may be permanently or non-permanently affected according to a calibration code in order to set the calibration of the current transformer. For example, one or more fuses may be burned to lock in a certain configuration of the current transformer.

    MAGNETIC FIELD SENSOR HAVING ALIGNMENT ERROR CORRECTION
    5.
    发明公开
    MAGNETIC FIELD SENSOR HAVING ALIGNMENT ERROR CORRECTION 审中-实审

    公开(公告)号：EP4325238A3

    公开(公告)日：2024-04-24

    申请号：EP23213503.8

    申请日：2017-06-02

    申请人： Allegro MicroSystems, LLC

    发明人： ROMERO, Hernán, D.

    IPC分类号： G01P21/02 ,  G01D18/00 ,  G01R35/00 ,  G01R33/00 ,  G01R33/06

    CPC分类号： G01P21/02 ,  G01R33/06 ,  G01R35/005 ,  G01R33/0017 ,  G01R33/0029

    摘要： A method of calibrating a magnetic field sensor includes setting a first input signal at a first input node of a processor of the magnetic field sensor to a constant value. While the magnetic field sensor experiences a magnetic field, a first transition at an output node of the processor is measured. A second input signal at a second input node of the processor is set to the constant value. While the magnetic field sensor experiences the magnetic field, a second transition of at the output node of the processor is measured. An orthogonality error value is calculated based on a deviation of the first transition and the second transition. The first and/or second input signal is adjusted by modifying the first and/or second input signal by a function of the calculated orthogonality error value to compensate for the orthogonality error.

    IMU CALIBRATION
    7.
    发明公开
    IMU CALIBRATION 审中-公开

    公开(公告)号：EP3389490A1

    公开(公告)日：2018-10-24

    申请号：EP16876874.5

    申请日：2016-12-16

    申请人： Mahfouz, Mohamed R.

    发明人： Mahfouz, Mohamed R.

    IPC分类号： A61B5/11 ,  G01C17/00 ,  G01C21/00

    CPC分类号： G01R35/005 ,  A61B5/065 ,  A61B5/7242 ,  A61B34/10 ,  A61B34/20 ,  A61B2017/00725 ,  A61B2034/102 ,  A61B2034/105 ,  A61B2034/108 ,  A61B2034/2048 ,  A61B2560/0223 ,  A61B2562/0219 ,  G01C17/38 ,  G01C25/005 ,  G01P21/00

    摘要： A method of calibrating an inertial measurement unit, the method comprising: (a) collecting data from the inertial measurement unit while stationary as a first step; (b) collecting data from the inertial measurement unit while repositioning the inertial measurement unit around three orthogonal axes of the inertial measurement unit as a second step; (c) calibrating a plurality of gyroscopes using the data collected during the first step and the second step; (d) calibrating a plurality of magnetometers using the data collected during the first step and the second step; (e) calibrating a plurality of accelerometers using the data collected during the first step and the second step; (f) where calibrating the plurality of magnetometers includes extracting parameters for distortion detection and using the extracted parameters to determine if magnetic distortion is present within a local field of the inertial measurement unit.

    MULTI-ELEMENT SENSOR ARRAY CALIBRATION METHOD
    9.
    发明授权
    MULTI-ELEMENT SENSOR ARRAY CALIBRATION METHOD 有权

    公开(公告)号：EP3139161B1

    公开(公告)日：2018-10-17

    申请号：EP16184005.3

    申请日：2016-08-12

    申请人： Rolls-Royce plc

    发明人： Hughes, Robert ,  Lane, Christopher

    IPC分类号： G01N27/90 ,  G01D18/00

    CPC分类号： G01R35/005 ,  G01D18/008 ,  G01N27/9086

    摘要： A method of calibrating a sensor array (100). The array (100) comprises a plurality of elements (112) spaced from one another in a first direction (X), the array (100) defining an array spatial response function f(x). The calibration method comprises the following steps: providing a test workpiece (110) comprising at least first and second calibrated defects (114, 116) spaced apart in the first direction by a characteristic distance such that when the first calibrated surface defect (114) is located at a position corresponding to a maximum of the array response function, the second calibrated surface defect (116) is located at a position corresponding to a minimum of the array response function; passing the array (110) across the first and second calibrated surface defects (114, 116) in a direction normal to the first direction (X) and determining a peak sensor signal from at least two of the elements (112) in the array (110) to determine a root mean squared average of the array spatial response function; and setting a rejection threshold as a predetermined proportion of the root mean squared average of the array spatial response function.

    CIRCUITS AND TECHNIQUES FOR PERFORMING SELF-TEST DIAGNOSTICS IN A MAGNETIC FIELD SENSOR
    10.
    发明公开
    CIRCUITS AND TECHNIQUES FOR PERFORMING SELF-TEST DIAGNOSTICS IN A MAGNETIC FIELD SENSOR 审中-公开

    公开(公告)号：EP3368913A1

    公开(公告)日：2018-09-05

    申请号：EP16816799.7

    申请日：2016-12-01

    申请人： Allegro MicroSystems, LLC

    发明人： MONREAL, Gerardo, A. ,  UBERTI, Bruno, Luis ,  MILESI,Alejandro, G. ,  HOLLINS, Joseph, D.

    IPC分类号： G01R33/07 ,  G01R33/00

    CPC分类号： G01R35/005 ,  G01R33/0035 ,  G01R33/075

    摘要： Systems and methods are provided herein for performing a self-test of a magnetic field sensor using internal diagnostic components for fault detection. The magnetic field sensor includes a magnetic sensing element coupled to a sensor biasing current source and a switching network coupled to the magnetic sensing element. The switching network includes one or more diagnostics switches and one or more signal switches, and the one or more diagnostic switches are coupled to a diagnostic input current source. The switching network is configured to generate a time-multiplexed signal having a magnetic signal responsive to an external magnetic field in a magnetic signal time period and a diagnostic signal in a diagnostic signal time period. The diagnostic signal may be operable to produce an intermediate signal to have a predetermined sequence between a first state and a second state.