CN105823913A - Portable electromagnetic shielding barrel for Dewar - Google Patents
Portable electromagnetic shielding barrel for Dewar Download PDFInfo
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- CN105823913A CN105823913A CN201510012141.XA CN201510012141A CN105823913A CN 105823913 A CN105823913 A CN 105823913A CN 201510012141 A CN201510012141 A CN 201510012141A CN 105823913 A CN105823913 A CN 105823913A
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- magnetic
- electromagnetic shielding
- substrate
- dewar
- shape
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Abstract
The present invention provides a portable electromagnetic shielding barrel for Dewar. The portable electromagnetic shielding barrel is used for carrying out electromagnetic shielding processing on a low temperature Dewar unit. The portable electromagnetic shielding barrel comprises a non-magnetic bucket-type substrate, a non-magnetic cap-type substrate bound to the non-magnetic bucket-type substrate, and at least one layer of metal film which coats the surfaces of the non-magnetic bucket-type substrate and the non-magnetic cap-type substrate, wherein the junction of the non-magnetic bucket-type substrate and the non-magnetic cap-type substrate is provided with a convex and concave lock, and a closed space is formed by the non-magnetic bucket-type substrate and the non-magnetic cap-type substrate through the convex and concave lock so as to encircle the low temperature Dewar unit. According to the portable electromagnetic shielding barrel for Dewar, the non-magnetic bucket-type substrate and the non-magnetic cap-type substrate are effectively sealed through the convex and concave lock, through designing different layers of metal films, all levels of electromagnetic interferences in a field are effectively handled, and the testing of a low temperature superconducting field under different environments is realized. The electromagnetic shielding barrel provided by the invention is light and easy to carry and can be repeatedly used, and the cost is reduced.
Description
Technical field
The present invention relates to electromagnetic shielding bucket field, particularly relate to a kind of Dewar portable electromagnetic shielding bucket being suitable for varying environment.
Background technology
Superconducting quantum interference device (SQUID) is a kind of extremely delicate that can measure faint magnetic signal, it it is functionally a kind of magnetic flux transducer, it is possible not only to the change for measuring magnetic flux, other physical quantitys that can be converted to magnetic flux can also be measured, such as voltage, electric current, resistance, inductance, magnetic induction, magnetic field gradient, susceptibility etc..SQUID needs to work at low temperatures, and usual use Dewar maintains low temperature environment during its work.Common Dewar has two types, is metal Dewar and nonmetal Dewar respectively, and because metal Dewar has preferable shielding to electromagnetic interference, during application, its electromagnetic shielding does not processes, but limitation is compared in application scenario.So generally using Non-magnetic dewar in practical, due to material reason, before not doing electromagnetic wave shielding and processing, in using, electromagnetic interference had no resistance.In order to solve electromagnetic interference problem, Non-magnetic dewar need to be carried out electromagnetic wave shielding process.
At present, in low-temperature superconducting is applied, protection to electromagnetic interference is all around the process that cryogenic unit itself is made, and first is directly to be coated with conductive metal film to Dewar outer layer to carry out electromagnetic shielding, and second is to carry out electromagnetic shielding to superconducting quantum interference device (SQUID) set niobium bucket.Both treatment technologies are the most ripe in laboratory environment application, but are directed to outfield experiments, and these processing modes are the most undesirable.First, as directly used Dewar external sheath conductive metal film mode to carry out electromagnetic shielding, whole cladding process is more complicated, make cannot to be coated with at scene when outfield experiments, early stage electromagnetic shielding layer covers can only be done according to the electromagnetic interference value that place provides at laboratory to process, even if strictly according to the facts, can not guarantee to tackle the electromagnetic environment that outfield is complicated and changeable, this disposable cladding screen layer is ensured, and the way of test system worked well increases the risk of the failure of an experiment.Secondly, it is simply that itself, what outfield experiments was mainly tested is active magnetic field and moving magnetic field in experiment, if not only considering elimination interference and the shielding of too much cladding, can decay useful signal, making experimental result undesirable.Finally, the shielding of niobium bucket is mainly used in the test of laboratory passive field, does not considers here.For overcoming problem encountered, we devise the electromagnetic shielding bucket of a kind of varying environment being applicable to field, it is ensured that the success rate of outfield experiments, thus accomplish time-consuming cost and through costly.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of portable electromagnetic shielding bucket for Dewar, for solving the problem that design of Electromagnetic Shielding of the prior art cannot meet the test request of varying environment.
For achieving the above object and other relevant purposes, the present invention provides a kind of portable electromagnetic shielding bucket for Dewar, and for cooled cryostat unit is carried out electromagnetic shielding process, described electromagnetic shielding bucket at least includes:
The substrate of barrel shape without magnetic；
The substrate of shape for hat without magnetic, it is incorporated on the described substrate of barrel shape without magnetic, the described substrate of barrel shape without magnetic and the junction without magnetic shape for hat substrate are provided with concavo-convex lock, by concavo-convex lock will without magnetic barrel shape substrate and without magnetic shape for hat substrate seal surround a confined space, to surround described cooled cryostat unit；
At least one of which metallic film, is coated on the described substrate of barrel shape without magnetic and without magnetic shape for hat substrate surface.
As the present invention for the scheme of a kind of optimization of the portable electromagnetic shielding bucket of Dewar, the described substrate of barrel shape without magnetic and be hard or soft material without magnetic shape for hat substrate.
Be used for the scheme of a kind of optimization of the portable electromagnetic shielding bucket of Dewar as the present invention, the described substrate of barrel shape without magnetic and the thickness range without magnetic shape for hat substrate are 3～8mm.
As the present invention for the scheme of a kind of optimization of the portable electromagnetic shielding bucket of Dewar, described concavo-convex lock includes the matrix being arranged on the described substrate of barrel shape without magnetic lock and is arranged on without locking with the convex of described matrix lock fitted seal on magnetic shape for hat substrate.
As the present invention for the scheme of a kind of optimization of the portable electromagnetic shielding bucket of Dewar, the groove walls of described matrix lock being provided with a pair recess, described convex is locked and is provided with a pair protuberance corresponding with described recess, and described protuberance is equipped in described recess.
Be used for the scheme of a kind of optimization of the portable electromagnetic shielding bucket of Dewar as the present invention, described concavo-convex lock is without magnetic metal material.
Be used for the scheme of a kind of optimization of the portable electromagnetic shielding bucket of Dewar as the present invention, the number of plies scope of described metallic film is 24～54 layers, and thickness in monolayer scope is 0.5～0.8 μm.
Be used for the scheme of a kind of optimization of the portable electromagnetic shielding bucket of Dewar as the present invention, the little metallic film that described metallic film is separated by the polylith uniformly arranged forms.
As the present invention for the scheme of a kind of optimization of the portable electromagnetic shielding bucket of Dewar, also it is sticked identification layer at described metal film surfaces.
As it has been described above, the portable electromagnetic shielding bucket for Dewar of the present invention, for cooled cryostat unit is carried out electromagnetic shielding process, including: without magnetic barrel shape substrate；The substrate of shape for hat without magnetic, it is incorporated on the described substrate of barrel shape without magnetic, the described substrate of barrel shape without magnetic and the junction without magnetic shape for hat substrate are provided with concavo-convex lock, by concavo-convex lock will without magnetic barrel shape substrate and without magnetic shape for hat substrate seal surround a confined space, to surround described cooled cryostat unit；At least one of which metallic film, is coated on the described substrate of barrel shape without magnetic and without magnetic shape for hat substrate surface.The present invention effectively will be sealed without magnetic barrel shape substrate with without magnetic shape for hat substrate by concavo-convex lock for the portable electromagnetic shielding bucket of Dewar, and by the metallic film of the different number of plies of design, successfully manage the various degrees of electromagnetic interference in field, it is achieved the test in low-temperature superconducting outfield under varying environment.The electromagnetic shielding bucket that this invention provides is light, it is easy to carries, and can repeatedly use, reduces the cost.
Accompanying drawing explanation
Fig. 1 is the present invention structural representation for the portable electromagnetic shielding bucket of Dewar.
Fig. 2 is present invention Longitudinal cross section schematic of concavo-convex lock in the portable electromagnetic shielding bucket of Dewar.
Fig. 3 is that the present invention locks the cross sectional representation along AA ' direction for the portable electromagnetic shielding bucket drop centre type of Dewar.
Fig. 4 is that present invention convex in the portable electromagnetic shielding bucket of Dewar locks the cross sectional representation along AA ' direction.
Fig. 5 is present invention structural representation of metallic film in the portable electromagnetic shielding bucket of Dewar.
Element numbers explanation
1 cooled cryostat unit
2 without magnetic barrel shape substrate
3 without magnetic shape for hat substrate
4 concavo-convex locks
41 matrix locks
411 recesses
42 convex locks
421 protuberances
5,6 metallic films
7 identification layers
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be understood other advantages and effect of the present invention easily by the content disclosed by this specification.The present invention can also be carried out by the most different detailed description of the invention or apply, and the every details in this specification can also carry out various modification or change based on different viewpoints and application under the spirit without departing from the present invention.
Refer to accompanying drawing.It should be noted that, diagram provided in the present embodiment illustrates the basic conception of the present invention the most in a schematic way, component count, shape and size when only showing the assembly relevant with the present invention rather than implement according to reality in the most graphic are drawn, during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random change, and its assembly layout kenel is likely to increasingly complex.
Niobium bucket of the prior art shielding is mainly used in the test of the passive field of laboratory, if for outfield experiments, main test is active magnetic field and moving magnetic field, existing way is that Dewar itself is carried out conductive metal film cladding, this disposable cladding is the thickest, test result can be affected, and this disposable cladding can not tackle the electromagnetic environment that outfield is changeable.In view of this, the present invention provides a kind of portable electromagnetic shielding bucket for Dewar, can the most anti-electromagnetic interference, especially in the outfield of low-temperature superconducting quantum interference device (SQUID) is applied, in the face of electromagnetic environment multiformity and uncertainty, its Heterosis is obvious especially, the time-consuming and monetary cost for outfield experiments.The present invention described in detail below is used for principle and the embodiment of the portable electromagnetic shielding bucket of Dewar, makes those skilled in the art need not creative work and is i.e. appreciated that the portable electromagnetic shielding bucket of the present invention.
The present invention provides a kind of portable electromagnetic shielding bucket for Dewar, as shown in Figure 1, for cooled cryostat unit 1 carries out electromagnetic shielding process, described electromagnetic shielding bucket at least includes: without magnetic barrel shape substrate 2, without magnetic shape for hat substrate 3, concavo-convex lock 4, at least one of which metallic film 5,6.
Size according to the actual Dewar cryogenic unit 1 used and structure, determine the size without magnetic barrel shape substrate 2.The thickness of the described substrate of barrel shape without magnetic 2 selects in the range of 3～8mm.In the present embodiment, the thickness of the described substrate of barrel shape without magnetic 2 elects 5mm temporarily as, and certainly, in other embodiments, the thickness of the described substrate of barrel shape without magnetic 2 can be 4mm, 6mm or 7mm etc..
As example, the material of the described substrate of barrel shape without magnetic 2 selects hard or soft material.In the present embodiment, the described substrate of barrel shape without magnetic 2 is hard material, such as, engineering plastics or epoxy etc..
The described substrate of shape for hat without magnetic 3 is incorporated on the described substrate of barrel shape without magnetic 2, and its dimensional thickness and material are mated with the described substrate of barrel shape without magnetic 2 one_to_one corresponding.Such as, the thickness of the described substrate of barrel shape without magnetic 2 is chosen as 5mm, and material is chosen as hard material, then the thickness without magnetic shape for hat substrate 3 is also selected to 5mm, and material is the most also hard material.
The described substrate of barrel shape without magnetic 2 and the junction without magnetic shape for hat substrate 3 are provided with concavo-convex lock 4, by concavo-convex lock 4 will without magnetic barrel shape substrate 2 and without magnetic shape for hat substrate 3 seal surround a confined space, to surround described cooled cryostat unit 1.
Specifically, the structure of described concavo-convex lock 4 is as shown in Figure 2 to 4, matrix lock 41 that described concavo-convex lock 4 includes being arranged on the described substrate of barrel shape without magnetic 2 and being arranged on without on magnetic shape for hat substrate 3 and described matrix locks the convex lock 42 of 41 fitted seal, locks 42 by matrix lock 41 and convex and is sealed in the substrate by cooled cryostat unit 1.
As in figure 2 it is shown, matrix lock 41 is in U shape structure, convex lock 42 is in T font structure, and the T word projection of convex lock 42 is embedded in the groove of matrix lock 41, thus realizes shield gasket effect.
It should be noted that described matrix lock 41 can also be arranged on without on magnetic shape for hat substrate 3, corresponding, convex lock 42 is then arranged on without on magnetic barrel shape substrate 2, the most also can play identical sealing effectiveness.
Further, as shown in Fig. 3～Fig. 4, in order to fast and effeciently position concavo-convex lock 4, the groove walls of described matrix lock 41 is provided with a pair recess 411, a pair protuberance 421 corresponding with described recess 411 then it is provided with on described convex lock 42, described protuberance 421 is equipped in described recess 411, it is achieved location.
Described metallic film 5,6 is coated on the described substrate of barrel shape without magnetic 2 and without magnetic shape for hat substrate 3 surface.Preferably, the number of plies of described metallic film 6 is chosen as 24～54 layers, and thickness in monolayer scope is 0.5～0.8 μm.When low-temperature superconducting outfield experiments, by selecting the number of plies of metallic film 5,6 to successfully manage the various degrees of electromagnetic interference in field flexibly.Such as, this meagrely-populated place on grassland and island, 24～27 layers of metallic film of general selection carry out anti-electromagnetic interference；And for example, in the place (village and mountain region) of some population and ordinary power line and communication tower, 30～45 layers of metallic film of general selection carry out anti-electromagnetic interference；For another example, at population than the area of comparatively dense and special place (cities and towns periphery and electrical network distribution network), 48～54 layers of metallic film of general selection carry out anti-electromagnetic interference.
In order to reduce the eddy current impact on experiment, needing to make described metallic film 5,6 cutting process, metallic film 5,6 structure that cutting is formed is as shown in Figure 5.Described metallic film one side conduction, one side insulation.Cutting process is substantially: utilizes cutter or laser that the block of metal thin film of conducting surface cuts into the little metallic film that polylith is uniformly arranged, finally the one side being bonded with the insulation of little metallic film is coated on without magnetic barrel shape substrate 2 with without on magnetic shape for hat substrate 3.The little metallic film formed after cutting is blockage shape, and the size of each blockage is 1cm*1cm.
It is also to be noted that described concavo-convex lock 4 is chosen as, without magnetic metal material, being pressed against described concavo-convex lock 4 without magnetic barrel shape substrate 2 with without on magnetic shape for hat substrate 3, it is desirable to concavo-convex lock 4 contacts with metallic film 5,6, to form good electric path.
It addition, for the number of plies preferably identifying metal 5,6, be sticked on described metallic film 5,6 one layer of identification layer 7 the most respectively.Such as, identification layer 7 is set to different colours, the corresponding specific number of plies of each color.As example, number of plies N=24 (red), N=27 (orange), N=30 (yellow), N=36 (green), N=42 (blue), N=48 (purple), N=54 (in vain) etc..
In sum, the present invention provides a kind of portable electromagnetic shielding bucket for Dewar, for cooled cryostat unit is carried out electromagnetic shielding process, including: without magnetic barrel shape substrate；The substrate of shape for hat without magnetic, it is incorporated on the described substrate of barrel shape without magnetic, the described substrate of barrel shape without magnetic and the junction without magnetic shape for hat substrate are provided with concavo-convex lock, by concavo-convex lock will without magnetic barrel shape substrate and without magnetic shape for hat substrate seal surround a confined space, to surround described cooled cryostat unit；At least one of which metallic film, is coated on the described substrate of barrel shape without magnetic and without magnetic shape for hat substrate surface.The present invention effectively will be sealed without magnetic barrel shape substrate with without magnetic shape for hat substrate by concavo-convex lock for the portable electromagnetic shielding bucket of Dewar, and by the metallic film of the different number of plies of design, successfully manage the various degrees of electromagnetic interference in field, realize the test in low-temperature superconducting outfield under varying environment, improve the success rate of experiment.The electromagnetic shielding bucket that this invention provides is light, it is easy to carries, and can repeatedly use, reduces the cost.
So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by any person skilled in the art.Therefore, art has all equivalence modification or changes that usually intellectual is completed under without departing from disclosed spirit and technological thought such as, must be contained by the claim of the present invention.
Claims (9)
1. for a portable electromagnetic shielding bucket for Dewar, for cooled cryostat unit is carried out electromagnetic shielding process, it is characterised in that described electromagnetic shielding bucket at least includes:
The substrate of barrel shape without magnetic；
The substrate of shape for hat without magnetic, it is incorporated on the described substrate of barrel shape without magnetic, the described substrate of barrel shape without magnetic and the junction without magnetic shape for hat substrate are provided with concavo-convex lock, by concavo-convex lock will without magnetic barrel shape substrate and without magnetic shape for hat substrate seal surround a confined space, to surround described cooled cryostat unit；
At least one of which metallic film, is coated on the described substrate of barrel shape without magnetic and without magnetic shape for hat substrate surface.
Portable electromagnetic shielding bucket for Dewar the most according to claim 1, it is characterised in that: the described substrate of barrel shape without magnetic and be hard or soft material without magnetic shape for hat substrate.
Portable electromagnetic shielding bucket for Dewar the most according to claim 1, it is characterised in that: the described substrate of barrel shape without magnetic and the thickness range without magnetic shape for hat substrate are 3～8mm.
Portable electromagnetic shielding bucket for Dewar the most according to claim 1, it is characterised in that: matrix lock that described concavo-convex lock includes being arranged on the described substrate of barrel shape without magnetic and being arranged on without locking with the convex of described matrix lock fitted seal on magnetic shape for hat substrate.
Portable electromagnetic shielding bucket for Dewar the most according to claim 4, it is characterized in that: in the groove walls of described matrix lock, be provided with a pair recess, described convex is locked and is provided with a pair protuberance corresponding with described recess, and described protuberance is equipped in described recess.
Portable electromagnetic shielding bucket for Dewar the most according to claim 1, it is characterised in that: described concavo-convex lock is without magnetic metal material.
Portable electromagnetic shielding bucket for Dewar the most according to claim 1, it is characterised in that: the number of plies scope of described metallic film is 24～54 layers, and thickness in monolayer scope is 0.5～0.8 μm.
Portable electromagnetic shielding bucket for Dewar the most according to claim 1, it is characterised in that: the little metallic film that described metallic film is separated by the polylith uniformly arranged forms.
Portable electromagnetic shielding bucket for Dewar the most according to claim 1, it is characterised in that: also it is sticked identification layer at described metal film surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510012141.XA CN105823913A (en) | 2015-01-09 | 2015-01-09 | Portable electromagnetic shielding barrel for Dewar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510012141.XA CN105823913A (en) | 2015-01-09 | 2015-01-09 | Portable electromagnetic shielding barrel for Dewar |
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| CN105823913A true CN105823913A (en) | 2016-08-03 |
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| CN201510012141.XA Pending CN105823913A (en) | 2015-01-09 | 2015-01-09 | Portable electromagnetic shielding barrel for Dewar |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87216407U (en) * | 1987-12-21 | 1988-08-03 | 中国科学技术大学研究生院 | Magnetic shield device made from high temperature super conductor function |
| US20030161077A1 (en) * | 2000-06-22 | 2003-08-28 | Yasuhiro Kawawake | Magnetoresistance effect device and magnetoresistance effect head comprising the same, and magnetic recording/reproducing apparatus |
| CN101206231A (en) * | 2007-12-20 | 2008-06-25 | 北京斯奎德生物磁技术有限公司 | Dewar flask for hyperthermia superconducting magnetic detection |
| CN101435533A (en) * | 2008-12-24 | 2009-05-20 | 西南交通大学 | Non-metal Dewar container of high temperature superconduction magnetic suspension experiment vehicle |
| CN201509392U (en) * | 2009-10-15 | 2010-06-16 | 北京普源精电科技有限公司 | Electronic module shielding case |
| CN102707204A (en) * | 2012-05-24 | 2012-10-03 | 中国科学院等离子体物理研究所 | Testing experimental platform for performing disruptive discharge on insulation sample under low-temperature vacuum environment |
| CN103245859A (en) * | 2013-04-26 | 2013-08-14 | 中国科学院上海技术物理研究所 | Improved testing system and method for focal plane detector chip |
| CN203551696U (en) * | 2013-10-30 | 2014-04-16 | 中国科学院上海微系统与信息技术研究所 | Non-magnetic Dewar electromagnetic shielding performance testing device |
| CN204330835U (en) * | 2015-01-09 | 2015-05-13 | 中国科学院上海微系统与信息技术研究所 | A kind of portable electromagnetic shielding bucket for Dewar |
-
2015
- 2015-01-09 CN CN201510012141.XA patent/CN105823913A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87216407U (en) * | 1987-12-21 | 1988-08-03 | 中国科学技术大学研究生院 | Magnetic shield device made from high temperature super conductor function |
| US20030161077A1 (en) * | 2000-06-22 | 2003-08-28 | Yasuhiro Kawawake | Magnetoresistance effect device and magnetoresistance effect head comprising the same, and magnetic recording/reproducing apparatus |
| CN101206231A (en) * | 2007-12-20 | 2008-06-25 | 北京斯奎德生物磁技术有限公司 | Dewar flask for hyperthermia superconducting magnetic detection |
| CN101435533A (en) * | 2008-12-24 | 2009-05-20 | 西南交通大学 | Non-metal Dewar container of high temperature superconduction magnetic suspension experiment vehicle |
| CN201509392U (en) * | 2009-10-15 | 2010-06-16 | 北京普源精电科技有限公司 | Electronic module shielding case |
| CN102707204A (en) * | 2012-05-24 | 2012-10-03 | 中国科学院等离子体物理研究所 | Testing experimental platform for performing disruptive discharge on insulation sample under low-temperature vacuum environment |
| CN103245859A (en) * | 2013-04-26 | 2013-08-14 | 中国科学院上海技术物理研究所 | Improved testing system and method for focal plane detector chip |
| CN203551696U (en) * | 2013-10-30 | 2014-04-16 | 中国科学院上海微系统与信息技术研究所 | Non-magnetic Dewar electromagnetic shielding performance testing device |
| CN204330835U (en) * | 2015-01-09 | 2015-05-13 | 中国科学院上海微系统与信息技术研究所 | A kind of portable electromagnetic shielding bucket for Dewar |
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Application publication date: 20160803 |