Shielding closed body demagnetization structure and method

Abstract

The invention discloses a shielding closed body demagnetization structure and method, and belongs to the field of demagnetization. The demagnetizing method for the shielding closed body comprises the following steps: S100, uniformly winding an X-axis coil, a Y-axis coil and a Z-axis coil in the demagnetizing coil on four thin layers parallel to an X axis, four thin layers parallel to a Y axis and four thin layers parallel to a Z axis of the hexahedral shielding layer respectively; and S200, the X-axis coil, the Y-axis coil and the Z-axis coil are electrified at the same time, so that a magnetic field constructed by the demagnetization coil forms three-dimensional alternate circulation, and demagnetization is completed in one step. According to the invention, demagnetization can be completed in one step and can be carried out on X, Y and Z axes at one time, so that the problem of magnetizing local soft magnetic materials in the demagnetization process is solved, and the demagnetization efficiency can be improved.

Description

technical field [0001] The invention relates to a demagnetization structure and method of a shielding closed body, belonging to the field of demagnetization. Background technique [0002] At present, large-scale magnetic shields can shield the earth's magnetic field, man-made magnetic field and other magnetic fields in the environment, so that the internal magnetic field becomes weaker and even close to a non-magnetic state. However, since the magnetically permeable material used is a soft magnetic material, it will gradually be magnetized when placed in a magnetic field environment for a long time, resulting in an increasing internal magnetic field, and therefore, its shielding effect is getting worse and worse. At present, the structure of the magnetic shield is mainly hexahedron, and the demagnetization methods adopted are I-type, Z-type and L-type, which are uniaxial, biaxial and triaxial demagnetization respectively. Among them, in the biaxial and triaxial demagnetizati...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a demagnetization structure and method for a shielding closure, so that the demagnetization can be completed in one step and performed on the X, Y, and Z axes at one time, which not only solves the problem of local soft magnetic material magnetization in the demagnetization process, but also Can improve demagnetization efficiency

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