An overall degaussing device for a magnetically shielded barrel

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

Active Publication Date: 2017-06-13
BEIJING AUTOMATION CONTROL EQUIP INST
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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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  • An overall degaussing device for a magnetically shielded barrel
  • An overall degaussing device for a magnetically shielded barrel

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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 present invention is an overall degaussing device for a magnetic shielding bucket, which is characterized by simple structure and convenient use, and is a small overall degaussing device for a magnetic shielding bucket especially suitable for the fields of nuclear magnetic resonance gyroscopes and the like. The degaussing device uses a degaussing structure arranged outside the magnetic shielding barrel to replace the existing method of degaussing the coil buried inside the magnetic shielding barrel. While ensuring the effective elimination of the remanence of the magnetic shielding barrel, it avoids occupying the inner space of the magnetic shielding barrel and reduces the magnetic shielding capacity. Bucket structure complexity and design difficulty. The degaussing device adopts an automatic driving method, which simplifies the process flow and improves the reliability of the degaussing device.

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 barrel. 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 Patents(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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