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公开(公告)号：US20240302457A1
公开(公告)日：2024-09-12
申请号：US18276446
申请日：2021-07-15
Inventor： Yang Lv , Xiaowei Hou , Liangguang Zheng , Peng Wu , Po Zhang , Shengping Zhu
IPC: G01R33/04 , H01L23/498
CPC classification number: G01R33/04 , H01L23/49811
Abstract: The invention discloses a fluxgate chip packaging structure thereof. The fluxgate chip packaging structure comprises a fluxgate bare chip, a conductive pin, and a packaging layer wrapping the fluxgate bare chip and a pin tail of the conductive pin; and the fluxgate bare chip is electrically connected to the pin tail. Based on the fluxgate bare chip, the fluxgate chip packaging structure forms a universal chip which can be applied to a fluxgate current sensor; during use, the fluxgate bare chip can be quickly connected to the fluxgate current sensor through the conductive pin, and the fluxgate chip packaging structure can be matched with the internal structure of existing fluxgate current sensors to realize magnetic field detection of sensors; and the fluxgate chip packaging structure can completely replace traditional enameled wire probes, thus greatly reducing the probe size.
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公开(公告)号：US12061214B2
公开(公告)日：2024-08-13
申请号：US17630716
申请日：2020-07-20
Applicant: LEM INTERNATIONAL SA
Inventor： Stephan Trombert
CPC classification number: G01R15/185 , G01R33/04
Abstract: Fluxgate current transducer including a fluxgate device comprising a saturable soft magnetic core and an excitation coil, and a processing circuit comprising a control circuit and a voltage generator connected to the control circuit for generating an alternating current in the excitation coil, the voltage generator generating a voltage oscillating between a maximum positive voltage (+Umax) and a maximum negative voltage (−Umax) configured to alternatingly saturate the soft magnetic core. The control circuit is configured to generate a voltage having an absolute value of amplitude less than an absolute value of said maximum positive voltage (+Umax) and said maximum negative voltage (−Umax) voltage during a variable time window (Tn, Tn+1, Tn+2, Tn+3) after detection of the excitation coil current reaching a threshold current (S3) representative of saturation of the magnetic core during at least a subset of a plurality of alternating voltage periods (P).
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公开(公告)号：US20240111001A1
公开(公告)日：2024-04-04
申请号：US17956758
申请日：2022-09-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Preetinder Garcha , Srinath Ramaswamy , Viola Schaeffer
CPC classification number: G01R33/04 , G01R33/0017
Abstract: In some examples, an apparatus comprises a first coil, a second coil, a control circuit, and a processing circuit. The second coil is magnetically coupled to the first coil. The control circuit has a signal output coupled to the first coil, and a control output, and the control circuit configured to: responsive to a state of the control input, select a field strength level from a set of discrete field strength levels; and provide a first signal representing the selected field strength level at the signal output. Also, the processing circuit has processing inputs and a processing output, the processing inputs coupled to the second coil, the processing output coupled to the control input, and the processing circuit configured to, responsive to a second signal across the processing inputs, set a state of the processing output representing a polarity of a magnetic field sensed by the second coil.
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公开(公告)号：US20240061024A1
公开(公告)日：2024-02-22
申请号：US17820121
申请日：2022-08-16
Applicant: ChargePoint, Inc.
Inventor： Ivan Baranov
CPC classification number: G01R19/0092 , G01R15/146 , G01R15/16 , G01R33/04
Abstract: An open-loop fluxgate-type current sensor is described. The current sensor includes a single winding around a core that combines drive and sense that is used as both an excitation source and a feedback element to measure current through a primary winding. The current sensor further includes an H-bridge driver to impress voltage to the single winding to cause current to saturate the core, the volage being impressed with opposing polarities repeatedly causing the core to saturate at opposing polarities. The current sensor further includes an analog transconductance integrator that continuously integrates the current to infer magnetizing force being driven into the core at the opposing polarities. The current sensor further includes a microcontroller unit (MCU) that calculates residual current based on the inferred magnetizing force being driven into the core at the opposing polarities and cause remedial action to be taken when the calculated residual current exceeds a threshold.
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公开(公告)号：US11656299B2
公开(公告)日：2023-05-23
申请号：US16668646
申请日：2019-10-30
Applicant: National Central University
Inventor： Chien-Chih Chen
CPC classification number: G01R33/091 , G01R33/04 , G01V3/087 , G08G1/042
Abstract: A near magnetic field variation detection method comprises following steps of: measuring magnetic field by a first magnetic field sensor and a second magnetic field sensor respectively; and calculating a magnetic field measurement difference, wherein the magnetic field measurement difference is (1) a magnitude of a difference of a first-magnetic-field-measurement measured by the first magnetic field sensor and a second-magnetic-field-measurement measured by the second magnetic field sensor, or (2) a magnitude of a difference of a first-magnetic-field-measurement-component measured by the first magnetic field sensor along a characteristic direction and a second-magnetic-field-measurement-component measured by the second magnetic field sensor along the characteristic direction; wherein a near magnetic field variation is occurred when (a) the magnetic field measurement difference is continuously greater than a characteristic-threshold within a characteristic-time-period, or (b) an average value of the magnetic field measurement difference is greater than a characteristic-average-threshold within a characteristic-average-time-period.
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Patent Agency Ranking
公开(公告)号：US11650229B2
公开(公告)日：2023-05-16
申请号：US17769139
申请日：2020-10-16
Applicant: LEM INTERNATIONAL SA
Inventor： Stéphan Trombert
CPC classification number: G01R15/185 , G01R33/02 , G01R33/04 , G01R33/045 , G01R33/05 , G01R33/0206
Abstract: Fluxgate current transducer including a fluxgate device comprising a saturable soft magnetic core and an excitation coil, and a processing circuit comprising a control circuit and a voltage generator connected to the control circuit for generating an alternating current in the excitation coil, the voltage generator generating a voltage oscillating between a maximum positive voltage (+U) and a maximum negative voltage (−U) configured to alternatingly saturate the soft magnetic core. The signal processing circuit comprises an overload circuit portion connected to the control circuit, configured to generate overload currents through the excitation coil over time windows (Tn) after detection of the excitation coil current reaching positive and negative threshold currents (+S3, −S3) representative of saturation of the magnetic core, during at least one of a plurality of alternating voltage periods (P).
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公开(公告)号：US20190204394A1
公开(公告)日：2019-07-04
申请号：US16333882
申请日：2017-08-22
Applicant: SAFRAN ELECTRONICS & DEFENSE
Inventor： Yannick BAUDET , Etienne MERLET , Fabrice JEAN , Laurent DESROCHES , Mickaël MAGALHAES
CPC classification number: G01R33/0047 , G01R33/00 , G01R33/04
Abstract: The invention provides a pendulum system including a pendulum connected to a connector, the system including wires connecting the pendulum to the connector, which wires are connected together in a twisted cable, the twisted cable presenting a spiral central portion generally shaped as a cone having its apex connected to the connector so as to be the portion of the spiral that is closest to the pivot point of the pendulum. The invention also provides a method of fabricating such a pendulum system.
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公开(公告)号：US20180284310A1
公开(公告)日：2018-10-04
申请号：US15766046
申请日：2016-10-05
Applicant: AICHI STEEL CORPORATION
Inventor： Takeshi KAWANO , Hideo ARAKAWA , Michiharu YAMAMOTO , Hitoshi AOYAMA , Kazuo URAKAWA
Abstract: A minute magnetic body detecting sensor includes: a magnetic impedance element, with two magneto-sensitive bodies disposed in substantially two-dimensional directions such that an angle formed by respective sensitive axes is substantially 90 degrees; and a signal processing device, including a signal processing circuit, processing and amplifying damped oscillating voltages output by the two magneto-sensitive bodies that detected a local magnetic field due to a minute magnetic body that is a foreign substance, two square operating elements, squaring output signals, an adder, adding the squared signals, and a square root operating element, performing square root computation on the addition output and outputting a square root output, and enables high-precision detection of existence or non-existence of a minute magnetic body without detection overlooking.
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公开(公告)号：US20180096784A1
公开(公告)日：2018-04-05
申请号：US15832884
申请日：2017-12-06
Applicant: Texas Instruments Incorporated
Inventor： Dok Won Lee , Sudtida Lavangkul , Erika Lynn Mazotti , William David French
IPC: H01F27/34 , G01R33/00 , H01F27/24 , H01L43/12 , H01L23/522 , H01L23/528 , G01R33/04 , H01F27/28
CPC classification number: H01F27/346 , G01R33/0029 , G01R33/04 , H01F27/24 , H01F27/28 , H01L23/5226 , H01L23/528 , H01L27/22 , H01L43/02 , H01L43/12
Abstract: An integrated fluxgate device, which includes a magnetic core, an excitation coil, and a sense coil. The magnetic core has a longitudinal edge and a terminal edge. The excitation coil coils around the longitudinal edge of the magnetic core, and the excitation coil has a first number of excitation coil members within a proximity of the terminal edge. The sense coil coils around the longitudinal edge of the magnetic core, and the sense coil has a second number of sense coil members within the proximity of the terminal edge. For reducing fluxgate noise, the second number of sense coil members may be less than the first number of excitation coil members within the proximity of the terminal edge.
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公开(公告)号：US09927497B2
公开(公告)日：2018-03-27
申请号：US15120951
申请日：2014-12-22
Applicant: Robert Bosch GmbH
Inventor： Frank Reichenbach , Sevki Gencol , Rainer Eckstein , Christian Patak , Achim Breitling , Arne Dannenberg , Frank Schatz
CPC classification number: G01R33/04 , G01R33/0011 , G01R33/0052
Abstract: A sensor apparatus having at least one magnet core, on at least one carrier surface, which encompasses at least one soft magnetic material and for which a respective longitudinal center plane, which is oriented perpendicularly to the carrier surface and divides the respective magnet core into two halves having an identical mass, is definable, at least one coil being on, around, and/or adjacent to the at least one magnet core, the at least one magnet core having in its interior sub-regions by which an initiation of a magnetization reversal of the respective magnet core is targetedly locally controllable since a drive energy to be applied for propagation of a magnetic domain wall is elevated. Also described is a manufacturing method for a sensor apparatus having at least one magnet core, and a method for ascertaining a field strength of a magnetic field in at least one spatial direction.
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