Novel multi-layer belt winding type low-noise permalloy magnetic shielding barrel structure

A permalloy and magnetic shielding technology, applied in the fields of magnetic/electric field shielding, shielding materials, metal containers, etc., can solve the problems of large Johnson current noise, large structural magnetic field noise, and low resistivity, so as to save materials and magnetic field noise Great, reduce the effect of eddy current loss

Active Publication Date: 2020-04-17
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The general permalloy magnetic shielding barrel curls the thick permalloy strip into a cylindrical shape and assembles multiple magnetic shielding barrels coaxially to achieve a higher shielding effect, but its resistivity is low and the size is thicker , will result in a large Johnson current noise
The structural magnetic field noise of the traditional permalloy shielding barrel is large, which cannot meet the needs of ultra-high sensitivity magnetic field and inertial measurement. It is necessary to design a new type of high shielding coefficient and low noise magnetic shielding barrel to solve the above problems

Method used

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  • Novel multi-layer belt winding type low-noise permalloy magnetic shielding barrel structure
  • Novel multi-layer belt winding type low-noise permalloy magnetic shielding barrel structure
  • Novel multi-layer belt winding type low-noise permalloy magnetic shielding barrel structure

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Embodiment Construction

[0020] Below with the accompanying drawings ( Figure 1-Figure 2 ) to illustrate the present invention.

[0021] figure 1 It is a schematic diagram of the structure of the main body of the belt-wound magnetic shielding barrel implementing the present invention. figure 2 is included figure 1 Schematic diagram of a new type of multi-layer tape-wound low-noise permalloy magnetic shielding barrel with the main structure of the middle tape-wound magnetic shielding barrel. refer to Figure 1 to Figure 2 As shown, a main body structure of a tape-wound magnetic shielding barrel includes an annular barrel wall, the annular barrel wall has at least two layers of permalloy strip winding layers 5, and the surface of the permalloy strip has an insulating layer 6. The insulating layer 6 makes the radial conductive thickness of the annular barrel wall discontinuous to prevent eddy current transmission, thereby reducing eddy current loss and its Johnson current noise, while the radial m...

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Abstract

The utility model discloses a novel multi-layer belt winding type low-noise permalloy magnetic shielding barrel structure. A permalloy strip with an insulating layer on the surface is wound into at least two layers of strip-wound magnetic shielding barrel main body structures; the radial conductive thickness of the shielding barrel is discontinuous to prevent eddy current transmission, so that eddy current loss and Johnson current noise thereof are reduced, meanwhile, the radial magnetic conductive thickness is still kept continuous without increasing hysteresis loss and noise caused by the hysteresis loss, and the application requirements of high shielding coefficient and low magnetic field noise are met.

Description

technical field [0001] The invention relates to magnetic shielding technology, in particular to a novel multi-layer tape-wound low-noise permalloy magnetic shielding bucket structure, which is formed by winding a permalloy strip with an insulating layer on the surface into a tape-wound magnetic shield with at least two layers The main structure of the shielding barrel can make the radial conductive thickness of the shielding barrel discontinuous and prevent eddy current transmission, thereby reducing eddy current loss and Johnson current noise, while the radial magnetic thickness remains continuous without increasing hysteresis loss and its resulting Noise, which is conducive to meeting the application requirements of high shielding factor and low magnetic field noise. Background technique [0002] A stable magnetic field environment that is not disturbed by the geomagnetic field (30000-60000nT, nT is the unit of magnetic field strength, Nat or nanoTesla) and the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
CPCH05K9/0049H05K9/0075
Inventor 丁铭马丹跃陆吉玺王坤房秀杰韩邦成
Owner BEIHANG UNIV
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