Demagnetizing method of multilayer shielding device

Abstract

The invention relates to a demagnetization method of a multilayer shielding device; the demagnetization method realizes demagnetization based on a demagnetization coil system, and the demagnetizationcoil system comprises a multi-turn demagnetization coil, a plurality of connecting wires and a power supply module; the multi-layer shielding device comprises at least two layers of shielding bodies,the shielding bodies are sleeved layer by layer from inside to outside, multiple turns of demagnetization coils are wound on each layer of shielding body at intervals, one half of each turn of demagnetization coil is located on the inner side of the wound shielding body, and the other half of each turn of demagnetization coil is located on the outer side of the wound shielding body; each demagnetization coil is connected to the power supply module through a corresponding connecting wire; the power supply module comprises a controller, and the controller is connected with each connecting wire.The demagnetization method comprises the steps: introducing corresponding demagnetization currents into all the demagnetization coils, demagnetizing all the layers of shielding bodies layer by layer from inside to outside and then performing demagnetization layer by layer from outside to inside, wherein the intensity of the demagnetization currents is set according to the sizes of all the layers of shielding bodies. Compared with an existing demagnetization method, the method can effectively improve the demagnetization effect.

Description

technical field [0001] The invention relates to the technical field of magnetic field shielding, in particular to a demagnetization method of a multilayer shielding device. Background technique [0002] The shielding device can shield the external geomagnetic field and environmental interference magnetic field, and provide an absolute magnetic field and its weak magnetic field environment. The development of aerospace engineering, defense industry, space science, life science, basic physics and other directions has put forward application requirements for shielding devices, and with the deepening of research, the requirements for the internal magnetic field environment of shielding devices have been continuously improved in recent years. [0003] The residual static magnetic field in the shielding device is a direct indicator to measure the degree to which the near-zero magnetic field is close to the true zero magnetic field, and is expressed by the amplitude of the static m...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a demagnetization method for multi-layer shielding devices based on at least some of the above defects, so as to solve the problem that it is difficult to achieve complete demagnetization of multi-layer shielding devices in the prior art

Images