公开(公告)号：US11181555B2

公开(公告)日：2021-11-23

申请号：US16391339

申请日：2019-04-23

申请人： Fu-Te Yuan ,  Yen-Chi Lee ,  Meng-Huang Lai

发明人： Fu-Te Yuan ,  Yen-Chi Lee ,  Meng-Huang Lai

IPC分类号： G01R15/18

摘要： A current sensing method and a current sensor are provided. The current sensing method includes the steps of: exciting a magnetic core to generate at least one pair of regions having opposite magnetization directions in the magnetic core; providing a current to pass through a sensing region of the magnetic core, so that the magnetic core correspondingly generates a magnetic field change; and sensing the magnetic field change of the magnetic core by a pickup coil wound around the magnetic core to output an output signal corresponding to the current.

公开(公告)号：US20200064379A1

公开(公告)日：2020-02-27

申请号：US16547604

申请日：2019-08-22

申请人： Fu-Te Yuan ,  Yen-Chi Lee

发明人： Fu-Te Yuan ,  Yen-Chi Lee

IPC分类号： G01R15/20

摘要： An electric current sensor includes a substrate, a first sloped surface, a second sloped surface, at least one conductive wire, a first anisotropic magnetoresistor (AMR) unit, a second AMR unit, a first magnetization direction setting device, and a second magnetization direction setting device. The first sloped surface and the second sloped surface are disposed on the substrate and arranged in a first direction. The at least one conductive wire extends along a second direction and is disposed beside the substrate. The first AMR unit is disposed on the first sloped surface. The second AMR unit is disposed on the second sloped surface. The first magnetization direction setting device and the second magnetization direction setting device are configured to set magnetization directions of the AMR units.

公开(公告)号：US11022632B2

公开(公告)日：2021-06-01

申请号：US16547604

申请日：2019-08-22

申请人： Fu-Te Yuan ,  Yen-Chi Lee

发明人： Fu-Te Yuan ,  Yen-Chi Lee

IPC分类号： G01R15/20

摘要： An electric current sensor includes a substrate, a first sloped surface, a second sloped surface, at least one conductive wire, a first anisotropic magnetoresistor (AMR) unit, a second AMR unit, a first magnetization direction setting device, and a second magnetization direction setting device. The first sloped surface and the second sloped surface are disposed on the substrate and arranged in a first direction. The at least one conductive wire extends along a second direction and is disposed beside the substrate. The first AMR unit is disposed on the first sloped surface. The second AMR unit is disposed on the second sloped surface. The first magnetization direction setting device and the second magnetization direction setting device are configured to set magnetization directions of the AMR units.

公开(公告)号：US20210033638A1

公开(公告)日：2021-02-04

申请号：US16944109

申请日：2020-07-30

申请人： Yen-Chi Lee ,  Fu-Te Yuan

发明人： Yen-Chi Lee ,  Fu-Te Yuan

IPC分类号： G01P13/00 ,  G01D5/16

摘要： A motion sensing module including a plurality of first and second magneto-resistive sensors and a processor is provided. The processor executes the following steps S1 and S2. The step S1: the processor defines at least one first coordinate system from a first portion of the first magneto-resistive sensors and a second portion of the second magneto-resistive sensors. The processor defines at least one second coordinate system from a third portion of the first magneto-resistive sensors and a fourth portion of the second magneto-resistive sensors. The first and the second coordinate systems are rotational symmetry to each other. The step S2: the first and second magneto-resistive sensors generate a plurality of sensing results according to an external magnetic field. The processor performs calculations according to these sensing results based on the first and second coordinate systems to obtain a calculation result and measures motion information according to the calculation result.

公开(公告)号：US20190331714A1

公开(公告)日：2019-10-31

申请号：US16391339

申请日：2019-04-23

申请人： Fu-Te Yuan ,  Yen-Chi Lee ,  Meng-Huang Lai

发明人： Fu-Te Yuan ,  Yen-Chi Lee ,  Meng-Huang Lai

IPC分类号： G01R15/18

摘要： A current sensing method and a current sensor are provided. The current sensing method includes the steps of: exciting a magnetic core to generate at least one pair of regions having opposite magnetization directions in the magnetic core; providing a current to pass through a sensing region of the magnetic core, so that the magnetic core correspondingly generates a magnetic field change; and sensing the magnetic field change of the magnetic core by a pickup coil wound around the magnetic core to output an output signal corresponding to the current.

公开(公告)号：US11061085B2

公开(公告)日：2021-07-13

申请号：US16519007

申请日：2019-07-23

申请人： Fu-Te Yuan

发明人： Fu-Te Yuan

IPC分类号： G01R33/09 ,  G01R33/00 ,  G01R17/10

摘要： A magnetic field sensing apparatus including a substrate, a plurality of magnetoresistance sensors and a plurality of magnetization direction setting devices is provided. A surface of the substrate includes a plurality of inclined surfaces and a plane surface. The magnetoresistance sensors include a plurality of first magnetoresistance sensors disposed at the inclined surfaces and a plurality of second magnetoresistance sensors disposed at the plane surface. The first magnetoresistance sensors include a first and a third portions and form a first full Wheatstone Bridge. The second magnetoresistance sensors include a second and a fourth portions and form a second full Wheatstone Bridge. The magnetization direction setting devices include a first and a second magnetization direction setting devices. The first magnetization direction setting device is disposed beside and overlaps with the first and the second portions. The second magnetization direction setting device is disposed beside and overlaps with the third and the fourth portions.

公开(公告)号：US11035913B2

公开(公告)日：2021-06-15

申请号：US16519010

申请日：2019-07-23

申请人： Fu-Te Yuan

发明人： Fu-Te Yuan

IPC分类号： G01R33/09

摘要： A magnetic field sensing device including a magnetic flux concentrating module and a plurality of vortex magnetoresistors is provided. The magnetic flux concentrating module has a first side, a second side, a third side and a fourth side, wherein the first side is parallel to the third side, the second side is parallel to the fourth side, and the first side is not parallel to the second side. The vortex magnetoresistors are disposed beside the first to the fourth sides. The vortex magnetoresistors have a same pinning direction. The pinning direction is inclined with respect to the first side and the second side. The vortex magnetoresistors are configured to be connected to form a plurality of different Wheatstone bridges, so as to sense magnetic field components in a plurality of different directions, respectively.

公开(公告)号：US20200057119A1

公开(公告)日：2020-02-20

申请号：US16519010

申请日：2019-07-23

申请人： Fu-Te Yuan

发明人： Fu-Te Yuan

IPC分类号： G01R33/09

摘要： A magnetic field sensing device including a magnetic flux concentrating module and a plurality of vortex magnetoresistors is provided. The magnetic flux concentrating module has a first side, a second side, a third side and a fourth side, wherein the first side is parallel to the third side, the second side is parallel to the fourth side, and the first side is not parallel to the second side. The vortex magnetoresistors are disposed beside the first to the fourth sides. The vortex magnetoresistors have a same pinning direction. The pinning direction is inclined with respect to the first side and the second side. The vortex magnetoresistors are configured to be connected to form a plurality of different Wheatstone bridges, so as to sense magnetic field components in a plurality of different directions, respectively.

公开(公告)号：US20180238973A1

公开(公告)日：2018-08-23

申请号：US15719586

申请日：2017-09-29

申请人： Fu-Te Yuan ,  Pei-Chun Kao ,  Meng-Huang Lai

发明人： Fu-Te Yuan ,  Pei-Chun Kao ,  Meng-Huang Lai

IPC分类号： G01R33/09

CPC分类号： G01R33/096

摘要： A magnetic field sensing apparatus and a sensing method are provided. The magnetic field sensing apparatus includes an anisotropic magnetoresistive (AMR) resistor, a current generator, and an arithmetic device. The AMR resistor is configured to provide a first resistance value according to a sensed magnetic field in a first magnetic field sensing phase and provide a second resistance value according to the sensed magnetic field in a second magnetic field sensing phase by a magnetized direction setting operation. The current generator provides a current based on a current direction to flow through two ends of the AMR resistor. The arithmetic device is configured to perform an arithmetic operation with respect to a first voltage difference and a second voltage difference generated according to the current respectively in the first magnetic field sensing phase and the second magnetic field sensing phase, and generate a magnetic field sensing voltage result accordingly.

公开(公告)号：US20200379064A1

公开(公告)日：2020-12-03

申请号：US16884076

申请日：2020-05-27

申请人： Fu-Te Yuan

发明人： Fu-Te Yuan

IPC分类号： G01R33/09 ,  G01C17/28

摘要： A magnetic field sensing apparatus including a magnetic flux concentrator, a plurality of single direction magneto-resistive sensors and a time division switching circuit is provided. The magnetic flux concentrator has a plurality of corners. The single direction magneto-resistive sensors have a same pinning direction. The single direction magneto-resistive sensors are respectively disposed beside the corners. The time division switching circuit is coupled to the single direction magneto-resistive sensors, and is configured to switch at least a portion of the junctions between the single direction magneto-resistive sensors to change a circuit connection between the magneto-resistive sensors, thereby forming different Wheatstone bridges being configured to measure different magnetic field components of the external magnetic field in different directions.