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公开(公告)号：US20190146009A1
公开(公告)日：2019-05-16
申请号：US15812849
申请日：2017-11-14
Applicant: Analog Devices Global Unlimited Company
Inventor： Paul Blanchard, III , Jochen Schmitt , Yogesh Jayaraman Sharma , Victor L. Iseli
IPC: G01R15/20
CPC classification number: G01R15/205 , G01R15/202 , G01R15/207
Abstract: Magnetic sensors may be positioned around an opening for a wire to measure the current flowing through the wire. A non-symmetric positioning of the sensors around the target measurement zone can enable an expanded measurement zone compared to conventional current measurement devices. Further, some sensors may be paired such that a hypothetical line connecting the sensors is tangential to the target measurement zone. Other sensors may be paired such that a hypothetical line between the sensors crosses the target measurement zone. The different pairs of the sensors can enable a reduction in the impact of stray field interference on the measurement of the current flowing through the wire.
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公开(公告)号：US20170276514A1
公开(公告)日：2017-09-28
申请号：US15466611
申请日：2017-03-22
Applicant: Analog Devices Global
Inventor： Jochen Schmitt , Jan Kubik
IPC: G01D5/16
CPC classification number: G01R33/091 , G01D5/145 , G01D5/16 , G01D5/24438
Abstract: Apparatus and methods provide sensing of quadrants, angles, or distance using magnetoresistive elements. A quadrant or angle sensor can have magnetoresistive elements split into multiple angles to generate an output with reduced harmonics. A distance sensor can have magnetoresistive elements split and spaced apart to generate an output with reduced harmonics. A biasing conductor can alternatingly carry different amounts of current (different in at least one of magnitude or direction) for DC offset compensation or cancellation.
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公开(公告)号：US20170261345A1
公开(公告)日：2017-09-14
申请号：US15064544
申请日：2016-03-08
Applicant: Analog Devices Global
Inventor： Jochen Schmitt
IPC: G01D5/16
Abstract: A system includes a multiturn counter that can store a magnetic state associated with a number of accumulated turns of a magnetic field. The multiturn counter includes a plurality of magnetoresistive elements electrically coupled in series with each other. A matrix of electrical connections is arranged to connect magnetoresistive elements of the plurality of magnetoresistive elements to other magnetoresistive elements of the plurality of magnetoresistive elements.
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公开(公告)号：US10788517B2
公开(公告)日：2020-09-29
申请号：US15812849
申请日：2017-11-14
Applicant: Analog Devices Global Unlimited Company
Inventor： Paul Blanchard, III , Jochen Schmitt , Yogesh Jayaraman Sharma , Victor L. Iseli
IPC: G01R15/20
Abstract: Magnetic sensors may be positioned around an opening for a wire to measure the current flowing through the wire. A non-symmetric positioning of the sensors around the target measurement zone can enable an expanded measurement zone compared to conventional current measurement devices. Further, some sensors may be paired such that a hypothetical line connecting the sensors is tangential to the target measurement zone. Other sensors may be paired such that a hypothetical line between the sensors crosses the target measurement zone. The different pairs of the sensors can enable a reduction in the impact of stray field interference on the measurement of the current flowing through the wire.
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15.发明申请公开(公告)号：US20190383643A1
公开(公告)日：2019-12-19
申请号：US16008869
申请日：2018-06-14
Applicant: Analog Devices Global Unlimited Company
Inventor： Jochen Schmitt , Enda Joseph Nicholl
Abstract: A system includes a magnetic sensor that can store a magnetic state associated with a number of accumulated turns of a magnetic target. The magnetic sensor may work in conjunction with a magnetic target. The magnetic target may produce a magnetic field that, at some positions, drops below a magnetic window of the magnetic sensor. The magnetic target may produce a magnetic field that is within the magnetic window when needed to update the magnetic state of the sensor to keep track of the accumulated turns of the magnetic target. The magnetic sensor may be initialized with one or more domain walls.
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Patent Agency Ranking
公开(公告)号：US20190257894A1
公开(公告)日：2019-08-22
申请号：US16277130
申请日：2019-02-15
Applicant: Analog Devices Global Unlimited Company
Inventor： Jochen Schmitt , Eoin Edward English
Abstract: The disclosure provides a magneto resistive field sensor for detecting position in a particular direction. The sensor includes a plurality of magneto resistive elements arranged in pairs. The elements of the same pair are arranged so that their sensitivity direction is oriented in the same direction. The elements of different pairs are oriented so that their sensitivity direction is oriented in a different direction, preferably substantially perpendicular to another pair. The magneto resistive sensors and their sensitivity directions are generally arranged in a plane, which is perpendicular to the direction of measurement of the device. The elements of each pair are arranged in series between two nodes so as to form a bridge circuit. As such, movement of the magnet in the first plane causes a substantially equal change in the elements of each pair, thereby compensating for this movement in the output signal.
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17.发明申请公开(公告)号：US20180128648A1
公开(公告)日：2018-05-10
申请号：US15682966
申请日：2017-08-22
Applicant: Analog Devices Global
Inventor： Jochen Schmitt
IPC: G01D5/165
Abstract: This disclosure describes, among other things, embodiments of devices, systems, and methods for using 3-dimensional (3D) magnetic sensors to detect the position of a magnetic target. By using 3D magnetic sensors, a two dimensional array of such magnetic sensors can be used to determine a 3D position of a magnetic target.
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公开(公告)号：US20170276740A1
公开(公告)日：2017-09-28
申请号：US15466578
申请日：2017-03-22
Applicant: Analog Devices Global
Inventor： Jochen Schmitt , Jan Kubik
CPC classification number: G01R33/091 , G01D5/145 , G01D5/16 , G01D5/24438
Abstract: Apparatus and methods provide sensing of quadrants, angles, or distance using magnetoresistive elements. A quadrant or angle sensor can have magnetoresistive elements split into multiple angles to generate an output with reduced harmonics. A distance sensor can have magnetoresistive elements split and spaced apart to generate an output with reduced harmonics. A biasing conductor can alternatingly carry different amounts of current (different in at least one of magnitude or direction) for DC offset compensation or cancellation.
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公开(公告)号：US20160245677A1
公开(公告)日：2016-08-25
申请号：US15048883
申请日：2016-02-19
Applicant: Analog Devices Global , Sensitec GmbH
Inventor： Gavin Patrick Cosgrave , Jochen Schmitt , Dermot G. O'Keeffe
CPC classification number: G01D5/24461 , G01D5/145
Abstract: Sensor error detection with an additional channel is disclosed herein. First and second magnetic sensing elements can be disposed at angles relative to each other. In some embodiments, the first and second magnetic sensing elements can be magnetoresistive sensing elements, such as anisotropic magnetoresistance (AMR) sensing elements. Sensor data from first and second channels, respectively, having the first and second sensing elements, can be obtained. Third channel can receive a signal from the first sensing element and a signal from the second sensing element, and sensor data from the third channel can be obtained. Expected third channel data can be determined and compared to the obtained third channel data to indicate error.
Abstract translation: 本文公开了具有附加通道的传感器误差检测。 第一和第二磁感应元件可相对于彼此成角度地布置。 在一些实施例中，第一和第二磁感应元件可以是诸如各向异性磁阻（AMR）感测元件的磁阻感测元件。 可以获得具有第一和第二感测元件的来自第一和第二通道的传感器数据。 第三通道可以接收来自第一感测元件的信号和来自第二感测元件的信号，并且可以获得来自第三通道的传感器数据。 可以确定预期的第三通道数据并将其与获得的第三通道数据进行比较以指示误差。
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公开(公告)号：US10955493B2
公开(公告)日：2021-03-23
申请号：US16294192
申请日：2019-03-06
Applicant: Analog Devices Global Unlimited Company
Inventor： Yogesh Jayaraman Sharma , Jochen Schmitt , Paul R. Blanchard
Abstract: A calibration apparatus for calibrating a magnetic sensor configured to generate an output signal indicative of magnetic field strength when a bias signal is applied to it is disclosed. The apparatus includes a test magnetic field generator (MFG) to generate magnetic fields of known magnitude, and further includes a processor to control the MFG to generate a known magnetic field, control the sensor to generate a test output signal when the MFG generates the known magnetic field and a known bias signal is applied to the sensor, and determine how to change the bias signal based on a deviation of the measured test output signal from an expected output signal. Using a test MFG that produces known magnetic fields when known bias signals are applied to sensors allows evaluating and compensating for changes in sensitivity of the sensors by accordingly changing bias signals applied to the sensors.
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