DUAL Z-AXIS MAGNETORESISTIVE ANGLE SENSOR - MULTIDIMENSION TECHNOLOGY CO LTD

Title:

DUAL Z-AXIS MAGNETORESISTIVE ANGLE SENSOR

Document Type and Number:

WIPO Patent Application WO/2016/026412

Kind Code:

A1

Abstract:

A dual Z-axis magnetoresistive angle sensor, comprising a circular permanent magnet encoding disc (3), two Z-axis magnetoresistive sensor chips (1, 2) and a PCB (5), two Z-axis magnetoresistive sensors (9) being located on the PCB (5), the magnetic field sensitive directions of the Z-axis magnetoresistive sensors (9) being orthogonal. The Z-axis magnetoresistive sensor chips (1, 2) each comprise a substrate (8) and at least one magnetoresistive sensor (9) located on the substrate (8), the magnetic field sensitive direction of the magnetoresistive sensor (9) being perpendicular to the substrate (8), the magnetoresistive sensor (9) comprising a flux concentrator (6) and magnetoresistive sensing units (7), the magnetoresistive sensing units (7) being electrically connected into a push-pull structure, a push arm and a pull arm of the push-pull structure being respectively located at two side positions equidistant from a Y-axis central line and above or below the flux concentrator (6). The circular permanent magnet encoding disc (3) is provided with a magnetisation direction parallel to the diameter direction, and when the permanent magnet encoding disc (3) rotates, a magnetic field measurement angle is calculated via orthogonal magnetic fields measured by the two Z-axis magnetoresistive sensor chips (1, 2), and may be used for representing a rotation angle of the circular permanent magnet encoding disc (3). The present invention has a simple structure, high sensitivity and high spatial flexibility.

Inventors:

DEAK JAMES GEZA (CN)
ZHOU ZHIMIN (CN)

Application Number:

PCT/CN2015/087215

Publication Date:

February 25, 2016

Filing Date:

August 17, 2015

Export Citation:

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Assignee:

MULTIDIMENSION TECHNOLOGY CO LTD (CN)

International Classes:

G01B7/30; G01R33/09

Foreign References:

CN104197827A	2014-12-10
CN204043603U	2014-12-24
JP2003075108A	2003-03-12
CN103901363A	2014-07-02
US20050253578A1	2005-11-17
CN101918796A	2010-12-15
CN101629802A	2010-01-20

Other References: