公开(公告)号：US11371862B2

公开(公告)日：2022-06-28

申请号：US16996167

申请日：2020-08-18

Applicant: Melexis Technologies SA

Inventor： Nicolas Dupre ,  Lionel Tombez ,  Gael Close ,  Yves Bidaux ,  David Goyvaerts

IPC: G01D5/14 ,  G01B7/30

Abstract: Angular position sensor system comprising: a cylindrical magnet rotatable about a rotation axis; and an angular position sensor device comprising: a substrate comprising a plurality of magnetic sensitive elements configured for measuring a first magnetic field component in a first direction and a second magnetic field component in a second direction perpendicular to the first direction; and a processing circuit configured for calculating the angular position; the sensor device being oriented such that the first direction is oriented in a circumferential direction, and the second direction is either parallel or orthogonal to the rotation axis; the sensor device being located at a predefined position where a magnitude of a third magnetic field component orthogonal to the first and second magnetic field component is negligible over the 360° angular range.

公开(公告)号：US20220099709A1

公开(公告)日：2022-03-31

申请号：US17484011

申请日：2021-09-24

Applicant: Melexis Technologies SA

Inventor： Lucian BARBUT ,  Francis MONCHAL ,  Simon HOUIS ,  Lionel TOMBEZ

IPC: G01R15/20 ,  G01R19/32

Abstract: A sensor device includes a silicon substrate having an active surface; a first sensing area disposed near a first edge of the active surface of the silicon substrate such that the first sensing area has at least one first magnetic sensing element is made of a first compound semiconductor material and contact pads; and a second sensing area disposed near a second edge of the active surface of the silicon substrate, such that the second edge is substantially opposite to the first edge, such that the second sensing area has at least one second magnetic sensing element made of a second compound semiconductor material and contact pads. A processing circuit is disposed of in the silicon substrate and is electrically connected via wire bonds and/or a redistribution layer with the contact pads of the first and second sensing areas.

公开(公告)号：US11276517B2

公开(公告)日：2022-03-15

申请号：US16435782

申请日：2019-06-10

Applicant: Melexis Technologies SA

Inventor： Yves Bidaux

IPC: H01F7/02 ,  G01B7/30 ,  G01D5/14 ,  H01F41/02

Abstract: A permanent magnet in the form of a multi-pole magnet, comprising an isotropic magnetic material, having a central axis, magnetised such that the magnetic field, considered on a virtual circle lies substantially in a virtual plane tangential to the circle, and rotates inside that virtual plane, depending on the position on the circle. A method of producing a magnet comprising: a) providing a shaped body comprising an isotropic magnetic material; b) providing at least four electrical conductor segments; c) simultaneously make currents flow in each conductor segment. A magnet made in this way. Use of such a magnet for angular position sensing. An angular position sensor system comprising such a magnet.

公开(公告)号：US11275704B2

公开(公告)日：2022-03-15

申请号：US16584105

申请日：2019-09-26

Applicant: Melexis Technologies SA

Inventor： Mathieu Poezart ,  Zsombor Lazar ,  Antonius Duisters

IPC: G06F13/36 ,  G06F13/362 ,  G06F13/38 ,  G06F13/40 ,  H04L12/413

Abstract: A communication system comprising: a digital serial bus, and a master device and at least one slave device connected to the bus. The master and the slave(s) are adapted to communicate according to a predefined communication protocol. The master is adapted for transmitting a continuous bitstream in the form of a plurality of frames, such that each frame comprises one or more words. Each word has a constant time duration, with the first word of each frame being a unique word transmitted by the master for indicating the start of a frame. One or more bits each word is transmitted by the master as a dominant bit; a non-dominant bit, for allowing the at least one slave to overwrite. The at least one slave is adapted for overwriting in the continuous bitstream some non-dominant bits to transmit data in a quasi-synchronous manner.

公开(公告)号：US11257643B2

公开(公告)日：2022-02-22

申请号：US16745972

申请日：2020-01-17

Applicant: Melexis Technologies SA

Inventor： Hao Wang

IPC: G01R33/07 ,  H01H25/06 ,  G01D5/14 ,  H01H36/00

Abstract: A rotary button system for use in a domestic apparatus, comprising: a ferromagnetic plate; a button removably mountable at a predefined first distance from said ferromagnetic plate on a first side of said plate, and rotatable about a virtual rotation axis substantially perpendicular to said plate, and comprising a permanent magnet magnetised in a direction perpendicular to said rotation axis; and a magnetic sensor device mounted at a predefined second distance from said ferromagnetic plate on a second side of said plate opposite the first side, and comprising one or more magnetic sensors for measuring one or more magnetic field components or field gradients, and configured for determining an angular position of the rotary button based on said one or more field components and/or field gradients.

公开(公告)号：US11150109B2

公开(公告)日：2021-10-19

申请号：US16833444

申请日：2020-03-27

Applicant: MELEXIS TECHNOLOGIES SA

Inventor： Takumi Yoshiya

IPC: G01B7/14 ,  G01D5/14 ,  G01B7/00 ,  F16H9/08 ,  F16H59/68 ,  F16H61/662

Abstract: A system includes a magnet for forming a magnetic field and a sensor between the magnet and an object having a circumferential surface. The object rotates around a rotation axis direction of the circumferential surface and displaces along the rotation axis direction, and an interaction between the magnet and a recess or projection portion of the circumferential surface of the object is configured to induce the magnetic field. The sensor outputs a first signal proportional to a first magnetic flux density in the rotation axis direction at a predetermined time, outputs a second signal proportional to a second magnetic flux density in a direction perpendicular to the circumferential surface of the object at the predetermined time, calculates an angle based on the first and the second magnetic flux density, and output a third signal proportional to the angle based on the first and the second magnetic flux density.

公开(公告)号：US11143527B2

公开(公告)日：2021-10-12

申请号：US16453321

申请日：2019-06-26

Applicant: Melexis Technologies SA

Inventor： Javier Bilbao De Mendizabal

IPC: G01D5/245

Abstract: A position sensor system comprising: a magnetic field generator movable relative to two sensor devices or vice versa. The system has at least one processor adapted with a special algorithm for determining a position of the magnetic field generator in a manner which is highly robust against a disturbance field. A method for determining the position of the magnetic field generator based on a set of equations, in particular a set of linear equations which allows to completely eliminate the external disturbance field.

公开(公告)号：US20210293901A1

公开(公告)日：2021-09-23

申请号：US17207290

申请日：2021-03-19

Applicant: Melexis Technologies SA

Inventor： Nicolas DUPRE ,  Yves BIDAUX

IPC: G01R33/022 ,  G01R33/07 ,  G01R33/00

Abstract: A method of determining a gradient of a magnetic field, includes the steps of: biasing a first/second magnetic sensor with a first/second biasing signal; measuring and amplifying a first/second magnetic sensor signal; measuring a temperature and/or a stress difference; adjusting at least one of: the second biasing signal, the second amplifier gain, the amplified and digitized second sensor value using a predefined function f(T) or f(T, ΔΣ) or f(ΔΣ) of the measured temperature and/or the measured differential stress before determining a difference between the first/second signal/value derived from the first/second sensor signal. A magnetic sensor device is configured for performing this method, as well as a current sensor device, and a position sensor device.

公开(公告)号：US11092461B2

公开(公告)日：2021-08-17

申请号：US16678336

申请日：2019-11-08

Applicant: Melexis Technologies SA

Inventor： Yves Bidaux

IPC: G01D5/14 ,  G01R33/022 ,  G01R33/07 ,  G01R33/09

Abstract: A position sensor system for determining a position of a sensor device relative to a magnetic structure, the system comprising: said magnetic structure comprising a plurality of poles; said sensor device comprising a plurality of magnetic sensors; the magnetic structure being movable relative to the sensor device, or vice versa; wherein: a distance between centres of adjacent poles varies along the movement direction; the sensor device is adapted: for determining a first magnetic field component parallel to, and a second magnetic field component perpendicular to a movement direction, and for calculating a coarse signal based on these components; and for determining a first and second gradient of these signals along the movement direction, and for calculating a fine signal based on these gradients; and for determining said position based on the coarse signal and the fine signal.

公开(公告)号：US11067413B2

公开(公告)日：2021-07-20

申请号：US16901776

申请日：2020-06-15

Applicant: MELEXIS TECHNOLOGIES SA

Inventor： Takumi Yoshiya

IPC: G01D5/14

Abstract: A rotation angle detector includes a magnet arranged to rotate, and a magnetic detection circuit provided with a first pair of magnetic detection elements arranged to be in combination sensitive to a first magnetic field in circumferential direction to the first surface and to a second magnetic field in normal direction to the first surface and arranged away from the rotation axis, and configured to detect magnetic flux of the magnet. A second pair of magnetic detection elements are arranged to be in combination sensitive to the first magnetic field in circumferential direction to the first surface and to the second magnetic field in normal direction to the first surface. A signal processing unit is configured to output a signal representative of a rotation angle of the magnet based on outputs of the first and second pair of magnetic detection elements.