CN103068213A - Flexible magnetic shielding device - Google Patents
Flexible magnetic shielding device Download PDFInfo
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- CN103068213A CN103068213A CN2012105487236A CN201210548723A CN103068213A CN 103068213 A CN103068213 A CN 103068213A CN 2012105487236 A CN2012105487236 A CN 2012105487236A CN 201210548723 A CN201210548723 A CN 201210548723A CN 103068213 A CN103068213 A CN 103068213A
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- magnetic shielding
- magnetic
- gauze screen
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- permalloy
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Abstract
The invention relates to a flexible magnetic shielding device. Shielding nets are formed by adhering magnetizable metal alloy wires side by side tightly. The shielding net forming a cylinder wall is in a corrugated shape. Each corrugated strip is parallel to an axis of a cylinder. The shielding net forming two cover boards at two ends of the cylinder is in a foldable umbrella shape. Therefore a whole magnetic shielding cover is extensible in various shapes so that magnetic shielding spaces with different sizes and different shapes are formed and magnetic lines of force are prevents from passing through the magnetic shielding cover. The shape of the shielding cover can be adjusted by a user according to practical requirements so that an ideal practical aim is achieved.
Description
Technical field
The present invention relates to magnetic field shielding device Function Extension field, relate in particular to a kind of flexible magnetism radome.
Background technology
Nowadays, electronic circuit and electronic technology are used increasingly extensive in fields such as family, industry, traffic, national defence, and electromagnetic interference has spreaded all over human lives's every nook and cranny.But along with becoming more meticulous of high-tech industry development, many sophisticated electronicses are also more and more harsher for the requirement of environmental magnetic field isolation, how to reduce magnetic field to the impact of ultrahigh precision electronic equipment, are the problems that high-tech industry is paid close attention to always.Whole scientific and technological circle are in the process of microminiaturization development, when the hard disk storage density larger, semiconductor wire width is also just more and more less, Optical Resolution is more and more higher, and it is more careful more responsive that system requirements will become, so the trickle change in magnetic field also can have influence on the efficient of equipment, the use that whether can put goods on the market of highly sophisticated device equipment, key point just is to make zero magnetic field environment, avoid the interference in magnetic field, thereby the use of magnetic field shielding equipment has become only selection.
Magnetic field shielding usefulness is main relevant with conductivity, the magnetic permeability of magnetic field shielding material.In general conductivity and magnetic permeability are more high-effect just better.According to the magnetic induction law of refraction: from the little medium of permeability to the large medium of permeability, the line of magnetic induction departs from method, from the large medium of permeability to the little medium of magnetic permeability, and line of magnetic induction deflection normal.Thereby the very large material of selection permeability, the magnetic shielding cover of making such as permalloy, put into magnetic field, because the permeability of magnetic shielding cover is considerably beyond space permeability, magnetic resistance is far smaller than air reluctance, thereby the line of magnetic induction of the overwhelming majority just passes through from the magnetic shielding cover body wall, and the cavity inside line of magnetic induction is few, so just reaches the purpose of magnetic screen.Nowadays radome is obtained large development to the magnetic field shielding performance on the market, but radome generally all is fixing, the object that volume is larger, and it is large to take up room, and is difficult for adjusting shortcoming.Although the combined shielding cover detachably makes up, conveniently move, still can't solve adjusting size, joint space-efficient problem.Therefore, how the shielding material pliability is improved, it can be stretched, regulating the usage space size is a problem that is worth solution.
Summary of the invention
How the present invention makes magnetic shielding cover having under the function prerequisite of armoured magnetic field in order to solve, and has the pliability scalability, the technological transformation of carrying out, thus realize the purpose that magnetic shielding cover can adjusting size.
The invention provides a kind of flexible magnetism radome, gauze screen is bonded side by side by magnetizable metal alloy wires densification, the gauze screen that consists of cylindrical wall is corrugated, each corrugation bar is parallel to each other and is parallel with the axis of cylindrical pressure vessel, the gauze screen of formation cylinder two end cover plate is corrugated radially, collapsible, cylindrical wall and cover plate, the corrugation keel of gauze screen is fixed with the magnetisable alloy bar of rigidity and does keel, thereby make whole magnetic shielding cover can form definite shape and can be out of shape flexible, form the magnetic shielding space of different sizes and shape, to stop the magnetic line of force by the magnetic shielding cover wall.
Magnetic shielding material is made of permalloy, and wherein nickel content is: 45～80%.This scope can make permalloy have good magnetic conductivity, meets the demand of radome material.
Comprise 1～5% in the permalloy cobalt or molybdenum are arranged.Purpose is in order to improve the suppleness of magnetic conductivity.The content of cobalt or molybdenum is excessively low, can't play the effect that suppleness strengthens, if too high material is excessively soft, then can't fix.In order to reach ideal effect, the present invention is made as 3.5% with cobalt or the molybdenum that comprises in the permalloy.
Two faces of gauze screen evenly spray the polyester fiber flexiplast.Can prevent that permeability magnetic material is aging, prolongs its useful life.
The permalloy that consists of gauze screen is 0.3～0.5 millimeter of diameter.If the permalloy diameter is meticulous, manufacturing process is numerous and diverse, high cost, and specification requirement is really up to the mark.If but excessively thick, then the slit of gauze screen can become greatly, stop that the effect of magnet-wire will weaken, so permalloy is 0.3～0.5 millimeter of diameter, meet current demand.The present invention is made as 0.38 millimeter of diameter in order to reach ideal effect with the permalloy of gauze screen.
The magnetic shielding cover outer surface evenly sprays reflectorized material, makes the magnetic shielding cover outside that one deck reflective membrane be arranged.When reducing outdoor shining upon on the impact of magnetic screen.
Further technological improvement of the present invention, magnetic shielding cover is designed to be made of double-deck magnetic screen net, fill the polyester fiber flexiplast in the middle of the Double-level Reticulated, distance between the Double-level Reticulated is 0.3～0.8 millimeter, outer layer net is 0.3～0.8 with the ratio of inner layer net nickel content, and outer layer net is 1.5～1.1 with the ratio of inner layer net cobalt or molybdenum content.In order to reach optimum efficiency, the present invention is made as 0.5 millimeter with the distance between the Double-level Reticulated, and outer layer net is decided to be 0.45 with the ratio of inner layer net nickel content, and outer layer net is decided to be 1.25 with the ratio of inner layer net cobalt or molybdenum content.
The present invention has obtained following technique effect:
By the improvement that the present invention carries out common magnetic shielding cover, cost increases not obvious, regulates so that radome is scalable, according to the space size of actual operating position adjusting radome, conserve space, the convenient use.
Description of drawings
Fig. 1 is the side schematic view of flexible magnetism radome of the present invention;
Fig. 2 is the cross sectional representation of flexible magnetism radome of the present invention.
Embodiment
As shown in Figure 1, the invention discloses a kind of flexible magnetism radome inventive method.Understand and enforcement the present invention for the ease of those of ordinary skills, the present invention is described in further detail below in conjunction with the drawings and the specific embodiments.
Embodiment:
Fig. 1, the flexible magnetism radome is bonded side by side by the magnetizable metal alloy wires densification of gauze screen, the gauze screen that consists of cylindrical wall 1 is corrugated, each corrugation bar is parallel to each other and is parallel with the axis 2 of cylindrical pressure vessel, the gauze screen of formation cylinder two end cover plate 3 is corrugated radially, collapsible, the corrugation keel of cylindrical wall 1 and cover plate 3 gauze screens is fixed with the magnetisable alloy bar of rigidity and does keel 4, thereby make whole magnetic shielding cover can form definite shape and can be out of shape flexible, form the magnetic shielding space of different sizes and shape, to stop the magnetic line of force by the magnetic shielding cover wall.
The magnetic screen net materials is made of permalloy, and comprising 3.5% in the permalloy has cobalt or molybdenum, and cobalt or molybdenum are conducive to improve the pliability of permalloy; Comprise 45～80% nickel in the permalloy.In general the content of nickel is higher in the permalloy, and then permeability is then higher, and is as shown in table 1:
| Code name | Thickness mm | Nickel content | Permeability |
| 1J51 | 0.02～0.04 | 49～50.5％ | 75 |
| 1J52 | 0.02～0.04 | 49～50.5％ | 62.5 |
| 1J65 | 0.02～0.04 | 64.5～66％ | 125 |
| 1J67 | 0.02～0.04 | 64.5～66％ | 200 |
| 1J83 | 0.02～0.04 | 78.5～79.5％ | 200 |
Table 1
As seen from Table 1, the magnetic conduction effect is best when the content of nickel reaches 78.5～79.5%, but nickel content is higher in permalloy, and the hardness of material is just higher, and hardness is high, and toughness is relatively poor usually; Good toughness, hardness is scarcely high.As shown in table 2 below:
| Hardness | Nickel content % |
| 170 | 45～46.5 |
| 170 | 49～50.5 |
| 190 | 49.5～51 |
| 210 | 78.5～80 |
| 240 | 79～81 |
Table 2
If therefore nickel content is up to 70%～80% in the permalloy, the hardness of material can increase, and this is unfavorable for the making of flexible material, more can lose this feature of pliability in the magnetic screen net.Only in 45～50%, the flexibility of alloy just can meet the demands.
Because the present invention is in order to guarantee the pliability of permalloy, and reduce the content of nickel, in order to guarantee high permeability of the present invention, gauze screen has been designed to double-deck pattern.Double-deck pattern has indirectly increased the thickness of gauze screen, but can not affect its pliability.Real data shows that the thickness of material is directly proportional with permeability, and the thicker then permeability of permalloy is higher.As shown in table 3:
| Thickness mm | Permeability |
| 0.005～0.01 | 100 |
| 0.02～0.04 | 125 |
| 0.05～0.09 | 187.5 |
| 0.1～0.5 | 275 |
Table 3
Therefore, gauze screen is designed to two net patterns, not only can guarantees the gauze screen high permeability, and have pliable and tough scalability.
The permalloy of gauze screen is 0.38 millimeter of diameter.Magnetic shielding cover is made of double-deck magnetic screen net, fills the polyester fiber flexiplast in the middle of the Double-level Reticulated, and the distance between the Double-level Reticulated is 0.5 millimeter, and outer layer net is 0.45 with the ratio of inner layer net nickel content, and outer layer net is 1.25 with the ratio of inner layer net cobalt or molybdenum content.The magnetic shielding cover outer surface evenly sprays reflectorized material, makes the magnetic shielding cover outside that one deck reflective membrane be arranged, and avoids light to disturb, and 1 two faces of gauze screen evenly spray the polyester fiber flexiplast, and preventing from wearing out prolongs its useful life.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. flexible magnetism radome, the cylindrical pressure vessel of the shape variable that is formed by the flexible magnetism gauze screen, it is characterized in that this gauze screen is bonded side by side by magnetizable metal alloy wires densification, the gauze screen that consists of cylindrical wall (1) is corrugated, each corrugation bar is parallel to each other and is parallel with the axis (2) of cylindrical pressure vessel, the gauze screen of formation cylinder two end cover plate (3) is corrugated radially, collapsible, the corrugation keel of cylindrical wall (1) and cover plate (3) gauze screen is fixed with the magnetisable alloy bar of rigidity and does keel (4), thereby make whole magnetic shielding cover can form definite shape and can be out of shape flexible, form the magnetic shielding space of different sizes and shape, to stop the magnetic line of force by the magnetic shielding cover wall.
2. flexible magnetism radome according to claim 1 is characterized in that described magnetic shielding material is made of permalloy, and wherein nickel content is: 45～50%.
3. flexible magnetism radome according to claim 2 is characterized in that comprising in the described permalloy 1～5% cobalt or molybdenum.
4. flexible magnetism radome according to claim 3, it is characterized in that comprising in the described permalloy 3.5% has cobalt or molybdenum.
5. flexible magnetism radome according to claim 2 is characterized in that (1) two face of described gauze screen evenly sprays the polyester fiber flexiplast.
6. flexible magnetism radome according to claim 2, the permalloy that it is characterized in that described formation gauze screen (1) is 0.3～0.5 millimeter of diameter.
7. flexible magnetism radome according to claim 6, the permalloy that it is characterized in that described formation gauze screen (1) is 0.38 millimeter of diameter.
8. flexible magnetism radome according to claim 1 is characterized in that described magnetic shielding cover outer surface evenly sprays reflectorized material, makes the magnetic shielding cover outside that one deck reflective membrane be arranged.
9. flexible magnetism radome according to claim 2, it is characterized in that described magnetic shielding cover is made of double-deck magnetic screen net (1), fill the polyester fiber flexiplast in the middle of the Double-level Reticulated, distance between the Double-level Reticulated is 0.3～0.8 millimeter, outer layer net is 0.3～0.8 with the ratio of inner layer net nickel content, and outer layer net is 1.5～1.1 with the ratio of inner layer net cobalt or molybdenum content.
10. flexible magnetism radome according to claim 9 is characterized in that the distance between the described Double-level Reticulated is 0.5 millimeter, and outer layer net is 0.45 with the ratio of inner layer net nickel content, and outer layer net is 1.25 with the ratio of inner layer net cobalt or molybdenum content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548723.6A CN103068213B (en) | 2012-12-18 | 2012-12-18 | Flexible magnetic shielding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548723.6A CN103068213B (en) | 2012-12-18 | 2012-12-18 | Flexible magnetic shielding device |
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| Publication Number | Publication Date |
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| CN103068213A true CN103068213A (en) | 2013-04-24 |
| CN103068213B CN103068213B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210548723.6A Expired - Fee Related CN103068213B (en) | 2012-12-18 | 2012-12-18 | Flexible magnetic shielding device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928200A (en) * | 2014-04-01 | 2014-07-16 | 国家电网公司 | Assembly type grading shield device used for electricity |
| CN104244687A (en) * | 2014-09-23 | 2014-12-24 | 中国科学院电子学研究所 | Electromagnetic shielding room |
| CN113917373A (en) * | 2021-10-26 | 2022-01-11 | 国网河南省电力公司濮阳供电公司 | Induced voltage shielding cover for power failure interval of high-voltage line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08139483A (en) * | 1994-11-09 | 1996-05-31 | Asahi Chem Ind Co Ltd | Electromagnetic wave shielding cover and manufacture thereof |
| CN1372300A (en) * | 2002-03-25 | 2002-10-02 | 宁波市友和新光源有限公司 | Microwave sulfur lamp shielding new cover and making method thereof |
| CN203151936U (en) * | 2012-12-18 | 2013-08-21 | 兰州大学 | Folding magnetic shielding device |
-
2012
- 2012-12-18 CN CN201210548723.6A patent/CN103068213B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08139483A (en) * | 1994-11-09 | 1996-05-31 | Asahi Chem Ind Co Ltd | Electromagnetic wave shielding cover and manufacture thereof |
| CN1372300A (en) * | 2002-03-25 | 2002-10-02 | 宁波市友和新光源有限公司 | Microwave sulfur lamp shielding new cover and making method thereof |
| CN203151936U (en) * | 2012-12-18 | 2013-08-21 | 兰州大学 | Folding magnetic shielding device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928200A (en) * | 2014-04-01 | 2014-07-16 | 国家电网公司 | Assembly type grading shield device used for electricity |
| CN103928200B (en) * | 2014-04-01 | 2017-02-01 | 国家电网公司 | Assembly type grading shield device used for electricity |
| CN104244687A (en) * | 2014-09-23 | 2014-12-24 | 中国科学院电子学研究所 | Electromagnetic shielding room |
| CN113917373A (en) * | 2021-10-26 | 2022-01-11 | 国网河南省电力公司濮阳供电公司 | Induced voltage shielding cover for power failure interval of high-voltage line |
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| Publication number | Publication date |
|---|---|
| CN103068213B (en) | 2015-07-15 |
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| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Zhonghu Inventor after: Zhu Beibei Inventor after: Ding Shaomei Inventor before: Zhao Zhonghu |
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Free format text: CORRECT: INVENTOR; FROM: ZHAO ZHONGHU TO: ZHAO ZHONGHU ZHU BEIBEI DING SHAOMEI |
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Granted publication date: 20150715 Termination date: 20151218 |
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