Device and method for testing magnetic property of high-permeability magnetic material in low-frequency weak magnetic environment

A technology of magnetic characteristics and magnetic environment, which is applied in measurement devices, magnetic performance measurement, shielding devices, etc., can solve the problem of large error between the design value and actual value, low accuracy and accuracy of theoretical calculation and simulation calculation of magnetic shielding device, and inability to obtain High magnetic permeability of materials such as permeability, to achieve the effect of improving precision and accuracy and reducing errors

Pending Publication Date: 2022-06-03
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The device and method for testing the magnetic properties of high-permeability materials in low-frequency and weak-magnetic environments provided by this application at least solve the problem of the inability to obtain the magnetic permeability of high-permeabilit

Method used

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  • Device and method for testing magnetic property of high-permeability magnetic material in low-frequency weak magnetic environment
  • Device and method for testing magnetic property of high-permeability magnetic material in low-frequency weak magnetic environment
  • Device and method for testing magnetic property of high-permeability magnetic material in low-frequency weak magnetic environment

Examples

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Example Embodiment

[0027] Example 1

[0028] figure 1 The structure diagram of the device for testing the magnetic properties of high-permeability materials in a low-frequency weak magnetic environment provided by the embodiment of the present disclosure, as shown in figure 1 As shown, the system includes: a coil group, a magnetic characteristic tester 2, a magnetic shielding cylinder 3 and a host computer 1;

[0029] The coil assembly is wound on the tested sample 5 and connected to the magnetic property tester 2 through the test wire 4, and the tested sample 5 wound with the coil assembly is placed in the magnetic shielding cylinder 3;

[0030] The magnetic shielding cylinder 3 is used to provide a weak magnetic environment for the tested sample 5 placed in the magnetic shielding cylinder, and shield the external interference magnetic field;

[0031] The magnetic characteristic tester 2 is used to provide excitation current to the coil set and detect the induced voltage of the sample 5 to be...

Example Embodiment

[0081] Example 2

[0082] image 3 It is a flowchart of a method for testing the magnetic properties of a high magnetic permeability material in a low-frequency weak magnetic environment provided according to an embodiment of the present application. The method includes:

[0083] Step 1: Prepare the sample 5 to be tested and wrap the coil assembly on the sample 5 to be tested;

[0084] Step 2: Connect the coil assembly to the magnetic characteristic tester 2 through the test wire 4;

[0085] Step 3: Place the tested sample 5 wound with the coil set on the sample platform 6 of the shielding cylinder 3 and cover the corresponding shielding cover to provide a weak magnetic environment for the tested sample 5;

[0086] Step 4: Start the magnetic characteristic tester 2, and the host computer 1 obtains the data measured by the magnetic characteristic tester 2 and draws the magnetization curve;

[0087] In the embodiment of the present disclosure, the tested sample 5 after windin...

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Abstract

The invention relates to a device for testing the magnetic property of a high-permeability magnetic material in a low-frequency weak magnetic environment. The device comprises a coil group, a magnetic property tester, a magnetic shielding cylinder and an upper computer, the coil assembly is wound on a tested sample piece and is connected with the magnetic property tester, and the tested sample piece wound with the coil assembly is placed in the magnetic shielding cylinder; the magnetic shielding cylinder provides a weak magnetic environment for a tested sample piece; the magnetic property tester is used for providing exciting current for the coil assembly, detecting the induced voltage of the tested sample piece and transmitting the measured data to the upper computer; and the upper computer is used for acquiring data tested by the magnetic characteristic tester and drawing a magnetization curve. According to the technical scheme, the problem that an existing magnetic material magnetic property testing device cannot obtain the magnetic conductivity of a high-magnetic-conductivity material in a low-frequency weak magnetic environment is solved, so that the precision and accuracy of theoretical calculation and simulation calculation of a magnetic shielding device are improved, and the error between a design value and an actual value is reduced.

Description

technical field [0001] The invention relates to the technical field of magnetic property measurement of high magnetic permeability materials, in particular to a magnetic property testing device and method of high magnetic permeability materials in a low-frequency weak magnetic environment. Background technique [0002] High magnetic permeability materials are usually used in the shielding of the geomagnetic field, shielding the external magnetic field through the shunt effect of the magnetic circuit. The actual geomagnetic environment is a low-frequency alternating magnetic field with a frequency range of about 0.1 to 300 Hz. The shielding coefficient of the alternating magnetic field is related to the magnetic and conductive properties of the shielding material. The magnetic permeability of permalloy and other materials varies with frequency, and it is the premise to ensure the accuracy of the calculation that the shielding coefficient is calculated by using the accurate ma...

Claims

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Application Information

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IPC IPC(8): G01R33/12G01R1/18
CPCG01R33/1223G01R33/1253G01R1/18
Inventor 徐学平孙津济周伟勇任建伊
Owner BEIHANG UNIV
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