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Magnetic sensing unit array and method for measuring planar two-dimensional magnetic field direction

A technology of sensing unit and sensitive direction, applied in the field of magnetic sensitive sensors, can solve problems such as poor accuracy and insufficient device robustness, and achieve the effects of improving robustness, reducing the influence of errors, and improving measurement accuracy

Pending Publication Date: 2022-07-08
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an array of magnetic sensing units and a method for measuring the direction of the two-dimensional magnetic field in a plane, so as to solve the problem of existing two-dimensional magnetic field direction sensors that adopt two sets of orthogonal core magnetic sensing units. Technical issues of insufficient device robustness and poor accuracy

Method used

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  • Magnetic sensing unit array and method for measuring planar two-dimensional magnetic field direction
  • Magnetic sensing unit array and method for measuring planar two-dimensional magnetic field direction
  • Magnetic sensing unit array and method for measuring planar two-dimensional magnetic field direction

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Embodiment 1

[0029] see figure 1 and figure 2 As shown in the figure, the present invention is a magnetic sensing unit array, and the magnetic sensing unit array includes three or more magnetic field sensitive directions (denoted as e 0 ) of the magnetic sensitive sensing units 1, each of the magnetic sensitive sensing units 1 is uniformly arranged along the circumferential direction, and the magnetic field sensitive direction e of each of the magnetic sensitive sensing units 1 0 are arranged in the radial direction.

[0030] Please refer to figure 2 As shown, the magnetic sensitive sensing unit 1 used in the present invention, when the external magnetic field H and the magnetic field sensitive direction e 0 When the angle between them changes, according to the giant magnetoresistance effect or tunneling magnetoresistance effect, in the linear response region, the magnetoresistance R(θ) of the magneto-sensitive sensing unit 1 can be approximated as a period of 2π. cosine function.

...

Embodiment approach

[0034] As a specific embodiment of the present invention, the magnetic field sensitive direction e of each of the magnetic sensitive sensing units 1 0 All are arranged radially toward the inside of the circumference.

[0035] As another specific embodiment of the present invention, the magnetic field sensitive direction e of each of the magnetic sensitive sensing units 1 0 Both are arranged radially toward the outside of the circumference.

[0036] In some embodiments of the present invention, the magneto-sensitive sensing unit 1 adopts a magneto-sensitive sensor unit with a period of 2π, specifically a magneto-sensitive sensor unit with a period of 2π in the direction of the magnetic field in a given plane. is the plane where the array of magneto-sensitive sensing units is located; for example, any one of giant magnetoresistance devices and tunneling magnetoresistive devices is used as the magneto-sensitive sensing unit 1 in the array of magneto-sensitive sensing units 1. I...

Embodiment 2

[0039] Please refer to Figure 1 to Figure 4 As shown in the figure, the present invention is a method for measuring the plane two-dimensional magnetic field direction based on a magnetic sensitive sensing unit array, wherein the specific structure of the magnetic sensitive sensing unit array please refer to the detailed introduction of the first embodiment, and will not be described here. repeat;

[0040] The method includes:

[0041] Set the reference direction of the external magnetic field of the magnetic sensitive sensing unit array, and measure the magnetoresistance of each magnetic sensitive sensing unit 1 in the magnetic sensitive sensing unit array under the reference direction of the external magnetic field, and measure the magnetic resistance of each magnetic sensitive sensing unit measured. The magnetoresistance R(θ) of unit 1 is fitted to obtain the first cosine function curve with a period of 2π Among them, θ represents the angle between each magnetic sensing ...

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Abstract

The invention provides a magnetic sensing unit array and a planar two-dimensional magnetic field direction measurement method, the magnetic sensing unit array comprises three or more than three magnetic sensing units with magnetic field sensitive directions, and the magnetic sensing units are uniformly arranged along the circumferential direction; and the magnetic field sensitive direction of each magnetic sensitive sensing unit is arranged along the radial direction. The method has the advantages that the two-dimensional magnetic field direction can be measured through fitting of the cosine function with the period of 2 pi, and the measurement precision of the two-dimensional magnetic field can be improved; and meanwhile, the device can still be normally used under the condition that part of the magnetic sensing units are damaged, and the robustness of the device can be improved.

Description

【Technical field】 [0001] The invention relates to the technical field of magnetic sensitive sensors, in particular to an arrangement of a magnetic sensitive sensing unit array, and a method for realizing plane two-dimensional magnetic field direction measurement by utilizing phase information generated by the magnetic sensitive sensing unit array arrangement. 【Background technique】 [0002] The core magneto-sensitive sensing units of existing two-dimensional magnetic sensors can be designed based on Hall effect devices, anisotropic magnetoresistance devices, giant magnetoresistance devices or tunneling magnetoresistance devices. Usually based on Hall effect devices, anisotropic magnetoresistance devices, giant magnetoresistance devices and tunneling magnetoresistance devices to achieve the measurement of two orthogonal direction components of the magnetic field in space, it is necessary to use two (groups) of orthogonally arranged cores For the magneto-sensitive sensing unit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/09G01R33/00
CPCG01R33/09G01R33/093G01R33/098G01R33/0005
Inventor 潘淼周伯萌付亮李阳志林全王锋苏子生李淑芬苏建志谢清来陈文杰苏志从陈泽强
Owner QUANZHOU NORMAL UNIV
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