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Z-axis magnetic field loading device

A loading device and magnetic field technology, applied in the field of magnetic sensors, can solve problems such as measurement difficulties

Inactive Publication Date: 2015-12-16
AAC MICROTECH CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the difficult problem of measuring the direction of the Z-axis magnetic field, and provide a Z-axis magnetic field loading device using a magnetostrictive material for magnetic field measurement with a new structure

Method used

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Experimental program
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Embodiment Construction

[0018] The surface acoustic wave sensor of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] ginseng Figure 1-3 Shown is a Z-axis magnetic field loading device 100 of the present invention, which includes a surface acoustic wave substrate 10 made of silicon-doped material, and a plurality of magnetostrictive film layers 20 stacked on the surface acoustic wave substrate 10 . The material of the magnetostrictive film layer 20 can be FeCoSiB, FeBSiC, FeGa, FeGaB, CoFe, CoFeB, NiFe and other iron-based alloy single-phase materials or one of composite materials, which has high magnetic permeability, high magnetostriction coefficient, Features of low coercive force and low saturation magnetic field. Wherein the plurality of magnetostrictive film layers 20 are arranged separately from each other and form the first groove 21 , the Z-axis magnetic field loading device 100 further includes a magnetic flux guide 30 disposed ab...

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Abstract

The invention relates to the technical field of magnetic sensors, and specifically refers to a Z-axis magnetic field loading device based on magnetostrictive material measurement. The Z-axis magnetic field loading device comprises a surface acoustic wave base, multiple magnetostrictive film layers stacked on the surface acoustic wave base, and a magnetic flux guide arranged above the magnetostrictive film layers. When an X-axis or Y-axis magnetic field is externally applied, the magnetic fields entering the magnetostrictive film layers are of the same magnitude and in the same direction, and the differential calculation output is zero. When a Z-axis magnetic field is externally applied, the magnetic fields entering the magnetostrictive film layers are of the same magnitude and in opposite directions, and the differential calculation output is not zero. Thus, the loading device can be used to measure a Z-axis magnetic field.

Description

【Technical field】 [0001] The invention relates to the technical field of magnetic sensors, in particular to a device for measuring a Z-axis magnetic field loading based on a magnetostrictive material. 【Background technique】 [0002] In recent years, mobile communication terminal devices including cellular phones have spread rapidly. For portability, it is particularly desirable to reduce the size and weight of the terminal device, especially its electronic components. SAW devices are beneficial for size and weight reduction, so SAW filters are often used for high-frequency and intermediate-frequency components of terminal equipment. [0003] Due to the high sensitivity of piezoelectric properties to changes in the external environment, SAW devices, such as delay lines, reflective delay lines, and resonators, are ideal for measuring stress, strain, temperature, pressure, acceleration, vibration, and other physical quantities. Typically, a SAW device is fabricated on a piezo...

Claims

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Application Information

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IPC IPC(8): G01R33/18
Inventor 欧阳君李杨童贝杨晓非陈实刘浏周卓帆
Owner AAC MICROTECH CHANGZHOU