Device capable of realizing magnetic field shielding without changing surrounding magnetic field distribution

Abstract

The invention relates to a device capable of realizing magnetic field shielding without changing surrounding magnetic field distribution. The device comprises a power source 1, a key 2, a resistor 3, an electromagnet 4, a circular ring 5 and a circular ring 6. The device is characterized in that the power source 1, the key 2, the resistor 3 and the electromagnet 4 are connected in series, connection and disconnection of the power source 1 are controlled by the key 2, the electromagnet 4 generates a uniform magnetic field, the circular ring 5 is prepared by a Cr-doped NdFeB material, the circular ring 6 is prepared by a NdFeB material, the two circular rings tightly contact, and the whole device is in an air environment. When relative magnetic permeability and inherent magnetization intensity of the circular ring 5 and the circular ring 6 and the radius dimension relation of the device satisfy conditions that magnetic field shielding and no magnetic field distribution change are realized, the device can realize magnetic field shielding and no influence on surrounding magnetic field distribution, so normal operation of the electrical and electronic equipment is not influenced by an external electromagnetic field.

Description

technical field [0001] The device can shield the magnetic field in the central area without affecting the distribution of the surrounding magnetic field, and belongs to the technical field of electromagnetic field. Background technique [0002] With the wide application of electronic products and the aggravation of electromagnetic environment pollution, the research of shielding technology is very important. Although the traditional shielding technology can shield the magnetic field, it also changes the surrounding magnetic field, which will interfere with the normal use of electrical and electronic equipment, especially for some precision electronic devices. For this reason, it is of great practical significance to design a device that can shield the magnetic field without affecting the distribution of the surrounding magnetic field. Contents of the invention [0003] In order to solve the above problems, the object of the present invention is to solve the above-mentione...

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