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Overall degaussing device of magnetic shielding bucket

A degaussing device and magnetic shielding technology, applied in the direction of magnetic objects, electrical components, circuits, etc., can solve the problems of unsuitable nuclear magnetic resonance gyroscope engineering application, lack of process repeatability, difficulty in optimizing key parameters, etc. reduce the complexity and design difficulty of the structure, avoid the effect of internal space

Active Publication Date: 2016-01-06
BEIJING AUTOMATION CONTROL EQUIP INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The magnetic shielding barrel used by the MRI gyro is small in size and should not be disassembled at any time. It is not suitable for internal embedding or threading degaussing
In addition, the traditional degaussing method mostly uses manual operation to reduce the magnetic induction, which does not have process repeatability and the optimization of key parameters is difficult, so it is not suitable for the engineering application of nuclear magnetic resonance gyro

Method used

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  • Overall degaussing device of magnetic shielding bucket
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Examples

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Embodiment Construction

[0027] The technical solutions of the present invention will be further described in detail below through specific examples.

[0028] An overall degaussing device for a magnetically shielded bucket, including a degaussing coil, a closed magnetic circuit bracket, a programming computer, a digital-to-analog converter, a power amplifier, and a transformer;

[0029] (1) The degaussing coil is located on the outside of the magnetic shielding barrel close to the wall of the magnetic shielding barrel;

[0030] The length L2 of the degaussing coil wound in the axial direction of the magnetic shielding barrel is less than the length L1 of the magnetic shielding barrel itself, and the degaussing coil and the magnetic shielding barrel form a closed magnetic circuit;

[0031] In this embodiment, aiming at the small size and few layers of the NMR gyro magnetic shielding barrel, a degaussing coil with a high coil constant is arranged outside the magnetic shielding barrel to demagnetize the ...

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Abstract

The invention discloses an overall degaussing device of a magnetic shielding bucket. The overall degaussing devoice has the advantages that the structure is simple, use is convenient, and the small overall degaussing devoice of the magnetic shielding bucket is especially suitable for the field of magnetic resonance gyroscopes and the like. According to the degaussing device, a degaussing structure is arranged outside the magnetic shielding bucket to replace an existing method of burying coils in a magnetic shielding bucket for degaussing, it is ensured that residual magnetism of the magnetic shielding bucket is effectively eliminated, meanwhile, the internal space of the magnetic shielding bucket is prevented from being occupied, and the structure complexity and design difficulty of the magnetic shielding bucket are lowered. An automatic driving mode is adopted in the degaussing device, the technological process is simplified, and the reliability of the degaussing device is improved.

Description

technical field [0001] The invention belongs to the technical field of a degaussing device, in particular to an integral degaussing device suitable for a nuclear magnetic resonance gyro magnetic shielding bucket. Background technique [0002] MRI gyros are highly dependent on accurate and stable magnetic fields. Passive magnetic shielding relying on magnetic shielding barrels is one of the main ways to isolate external magnetic field interference. The magnetic shielding bucket is made of soft magnetic material with high magnetic permeability, which will inevitably produce residual magnetism during processing, assembly and use. Different from the general large-scale magnetic shielding bucket, with the continuous reduction of the size of the gyroscope, the influence of the residual magnetism of the material of the small magnetic shielding bucket on the magnetic field inside the bucket has become the main factor. Larger material remanence will increase the difficulty of activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F13/00
Inventor 郑辛郭宇豪秦杰汪世林王春娥刘建丰孙晓光
Owner BEIJING AUTOMATION CONTROL EQUIP INST
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