Device and method for detecting magnetic shielding effect of magnetic shielding material under low magnetic field

Abstract

The invention relates to a device and method for detecting the magnetic shielding effect of a magnetic shielding material under a low magnetic field. The device includes: a test tube, a fixed measurement system, a control acquisition system, a Gauss meter and a Gauss probe; the control acquisition system is connected to the Gauss meter; the Gauss meter is connected to the Gauss probe; the control acquisition system includes: an external magnetic field and control analysis equipment; an external magnetic field , used to generate a magnetic field; fixed measurement system, used to fix the external magnetic field and the Gauss probe; the test tube is located under the magnetic field, the test tube is a standard tube, or a sample tube; the Gauss probe is located in the test tube; the Gauss probe is used to test the magnetic field strength The magnetic field strength test result is transmitted to the control acquisition system through the gauss meter; the control analysis device is used to obtain the magnetic field strength through the gauss meter, analyze the magnetic field strength after shielding, and obtain the shielding effect. The device and method of the present application can compare the magnetic shielding performance of different ultra-thin soft magnetic materials under low magnetic field.

Description

technical field [0001] The invention relates to sensor technology, in particular to a device and method for detecting the magnetic shielding effect of a magnetic shielding material under a low magnetic field. Background technique [0002] For example, the biggest feature of permalloy material is its high permeability in weak magnetic field. [0003] However, the production process of permalloy is relatively complicated. The plate rolling process, annealing temperature, time, and cooling speed after annealing all have a great influence on the final magnetic properties of the material. In addition, some permalloys have good plasticity. It can even be processed into ultra-thin strips of 1 μm. [0004] For this kind of flake materials, the conventional magnetic permeability detection device is difficult to measure the magnetic permeability curve under low magnetic field, and has high requirements on the shape, specification and volume of the sample. Contents of the invention ...

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Problems solved by technology

[0003] However, the production process of permalloy is relatively complicated. The plate rolling process, annealing temperature, time, and cooling speed after annealing all have a great influence on the final magnetic properties of the material. In addition, some permalloys have good plasticity. It can even be processed into ultra-thin tapes of 1 μm

[0004] For this kind of flake materials, the conventional magnetic permeability detection device is difficult to measure the magnetic permeability curve under low magnetic field, and has high requirements for the shape, specification and volume of the sample.

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