CN109413982A - A kind of seawater electromagnetic shield - Google Patents
A kind of seawater electromagnetic shield Download PDFInfo
- Publication number
- CN109413982A CN109413982A CN201811508334.4A CN201811508334A CN109413982A CN 109413982 A CN109413982 A CN 109413982A CN 201811508334 A CN201811508334 A CN 201811508334A CN 109413982 A CN109413982 A CN 109413982A
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- Prior art keywords
- seawater
- transmitting plate
- side light
- electromagnetic
- shield
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
Abstract
The invention discloses a kind of seawater electromagnetic shields, wherein: including left side light-transmitting plate and right side light-transmitting plate, it is filled by seawater in gap between left side light-transmitting plate and right side light-transmitting plate, seawater is as electromagnetic shield, it is electromagnetic radiation area on the left of the light-transmitting plate of left side, the right side of right side light-transmitting plate is electromagnetic shield regions or zone of protection, and left side light-transmitting plate and right side light-transmitting plate are the DM305 glass with low-k.Seawater salinity value is in ‰ range of 1.0-40.0.The present invention have the advantages that shield effectiveness is good, structure is simple, it is cheap, transparent with light wave, be recycled it is thermally conductive.
Description
Technical field
The invention belongs to be electromagnetically shielded field, it is related to a kind of using seawater as the electromagnetic shield of electromagnetic shielding material.
Background technique
With the continuous development of science and technology, electric appliance and electronic equipment are gradually information-based and integrated, this brings
While providing amenities for the people, a very important problem is also resulted in --- electromagnetic pollution.Electronic component is constantly to miniaturization, height
Integrated direction development is spent, sensitivity is also higher and higher, this causes electronic component more " sensitivity ", easily by external interference or surreptitiously
It listens, Electromagnetic Interference, electromagnetic wave information are divulged a secret and the harm of electromagnetic environment etc. has become the problem of people increasingly pay close attention to.It explores
Efficient and practical electromagnetic shielding material prevents electromagenetic wave radiation from polluting to protect environmental and human health impacts, prevents electromagnetic wave from letting out
Leakage has become current problem in the urgent need to address in the world to ensure information safety.
Electromagnetic shielding refers to be reflected or the material of electromagnetic wave absorption with various, the electromagnetism that certain equipment or certain system are generated
Energy limit is in defined space or it is made to be reduced to the device of degree of admission to extraneous leakage: or in specified space
In to avoid external electromagnetic energy from entering or the technology and methods that make it be attenuated to degree of admission.Strictly speaking, according to its shielding
Mechanism is broadly divided into two classes: reflection-type electromagnetic shielding and absorption-type electromagnetic shielding.Reflection-type electromagnetic shielding mainly passes through conduction
Particle formulation goes out conductive composite material, such as conductive polymer material, conducting concrete, conductive rubber and intelligent semi-conductor electricity
Magnetic shielding material etc., they are to promote its conductivity with higher with doping or metal filling mode, are realized to electromagnetic wave
Strong reflection, to make it have preferable electromagnetic shielding (or energy selectivity shielding) efficiency.Absorption-type electromagnetic shielding material master
To go out absorption-type composite material by electromagnetic wave absorption particle formulation, by the effect for realizing electromagnetic shielding to the absorption of electromagnetic wave
Fruit.
But more or less all there are some defects in above-mentioned electromagnetic shielding material, as shield effectiveness is low, wideband absorb it is difficult,
Processing difficulties, the problems such as perishable, preparation process is complicated, expensive, environment sensitive is vulnerable.Therefore a kind of to have light wave saturating
The it is proposed for the electromagnetic shielding material that bright, electromagnet shield effect easily reconstructs, is recycled the advantages that thermally conductive, cheap is that have very much must
It wants.
Summary of the invention
That the technical problem to be solved by the present invention is to solve the above shortcomings of the prior art and to provide a kind of shield effectiveness is good,
Structure is simple, it is cheap, transparent with light wave, be recycled thermally conductive seawater electromagnetic shield.
To realize the above-mentioned technical purpose, the technical scheme adopted by the invention is as follows:
A kind of seawater electromagnetic shield, in which: including left side light-transmitting plate and right side light-transmitting plate, left side light-transmitting plate and right side light-transmitting plate
Between gap filled by seawater, seawater is electromagnetic radiation area, right side light-transmitting plate on the left of the light-transmitting plate of left side as electromagnetic shield
Right side be electromagnetic shield regions or zone of protection.
To optimize above-mentioned technical proposal, the concrete measure taken further include:
Above-mentioned left side light-transmitting plate and right side light-transmitting plate is glass.
Above-mentioned left side light-transmitting plate and right side light-transmitting plate uses the DM305 glass with low-k.
Above-mentioned seawater salinity value is in ‰ range of 1.0-40.0.
The present invention rises in electromagnetic shielding mechanism according to the physical shielding mechanism of electromagnetic shielding material, the i.e. conductivity of material
Key effect is proposed using seawater as a kind of concept of effective electromagnetic shielding material.Seawater is a kind of natural fluid substance, tool
There are higher dielectric constant and conductivity parameters, there is stronger reflection and attenuation effect, thus natural tool to interference electromagnetic wave
There is preferable electromagnet shield effect.Electromagnetic shield structure of the invention is made of double glazing and seawater, in wider frequency
There is good shield effectiveness in range.The direction of illumination of external electromagnetic wave is followed successively by glassy layer, seawater, glass from front to back
Layer.When external electromagnetic field enters via left side glass, portion of energy reflection can be generated on surface；Remaining electromagnetic energy part enters
Electromagnetic energy inside shield can partially be transmitted through right side glassy layer by Absorption by Sea Water, into electromagnetic shield regions or
Zone of protection.
Detailed description of the invention
Fig. 1 is double glazing encapsulation seawater electromagnetic shield structural schematic diagram；
Fig. 2 is influence of the sea water layer thickness to shield effectiveness；
Fig. 3 is influence of the glassy layer thickness to shield effectiveness；
Fig. 4 is influence of the seawater salinity to shield effectiveness；
Fig. 5 is influence of the ocean temperature to shield effectiveness.
For Fig. 2 into Fig. 5, ordinate SE is shield effectiveness, and abscissa qrequency is wave frequency.
Appended drawing reference are as follows: left side light-transmitting plate 1, right side light-transmitting plate 2, seawater 3.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
A kind of seawater electromagnetic shield, in which: including left side light-transmitting plate 1 and right side light-transmitting plate 2, left side light-transmitting plate 1 and the right side
Gap between side light-transmitting plate 2 is filled by seawater 3, and seawater 3 is used as electromagnetic shield, is electromagnetic radiation on the left of left side light-transmitting plate 1
Area, the right side of right side light-transmitting plate 2 are electromagnetic shield regions or zone of protection.
In embodiment, left side light-transmitting plate 1 and right side light-transmitting plate 2 are glass.
In embodiment, left side light-transmitting plate 1 and right side light-transmitting plate 2 are using the DM305 glass with low-k.
In embodiment, 3 salt angle value of seawater is in ‰ range of 1.0-40.0.
Below with specifically test to seawater shield of the present invention sea water layer thickness, glassy layer thickness, seawater salinity with
And shield effectiveness is verified under the varying environments such as ocean temperature.
As shown in Figure 1: the schematic diagram of seawater shield structure, by left area 1, intermediate region 2,3 groups of right area
At 1 region and 3 regions use low-k DM305 glass, and complex dielectric permittivity real and imaginary parts are approximately respectively,, centre is the seawater of the various concentration needed.
Different sea water layer thicknessTo the shadow of the shield effectiveness calculated result of seawater electromagnetic shield structure shown in FIG. 1
It rings: assuming that all taking room temperature in all extraneous factors=20 DEG C, salt angle value=35 ‰, thus can according to seawater debye dispersive model
Know its static dielectric=72.5, the relaxation time=9.09 × 10-12s, conductivity=4.8S/m, glass
Glass thickness==3.0cm。Thickness be respectively set to 3cm, 5cm, 7cm, 9cm.Obtained shield effectiveness result such as Fig. 2 institute
Show, as seen from Figure 2: when the electromagnetic property parameters of seawater determine, the thickness of sea water layer is bigger, and shield effectiveness is higher.Together
When, when the structural parameters of seawater electromagnetic shield and electromagnetic property parameters determine, electromagnet shield effect increases with frequency and is increased
By force.
Different glass thickness degreeInfluence to the shield effectiveness calculated result of seawater electromagnetic shield structure shown in FIG. 1:
Assuming that the electromagnetic parameter and structure of seawater are constant in all extraneous factors,=7.0cm,Thickness be respectively set to 1cm,
3cm,5cm,7cm.Obtained shield effectiveness result is as shown in figure 3, as seen from Figure 3: the thickness of glassy layer is to designed
The shield effectiveness of seawater electromagnetic shield influences smaller.Particularly, for low-frequency range electromagnetic wave, the thickness of glassy layer is compared to entering
The wavelength of radio magnetic wave can be ignored, the shield effectiveness difference very little of seawater electromagnetic shield.
Different salt concentration of sea-waterInfluence to the shield effectiveness calculated result of seawater electromagnetic shield structure shown in FIG. 1:
Assuming that other than salt concentration of sea-water is different, remaining factor is identical in all extraneous factors,==3cm, =7cm.Again
Because Global Seawater salt angle value about changes in ‰ range of 1.0-40.0, average value about 35.0 ‰.Concentration be respectively set to
0.00‰,30.0‰,35.0‰,40.0‰.Obtained shield effectiveness result is as shown in figure 4, as seen from Figure 4: seawater salt
Angle value is higher, and shield effectiveness is better.Particularly, when seawater salinity is 0, electromagnetic property is shielded close to deionized water
Body is smaller to the conduction absorption loss of low-frequency electromagnetic wave, mainly generates periodic reflection loss, such as the low frequency range institute in Fig. 4
Show；For frequency electromagnetic waves, shield effectiveness enhancing as shown in the high frequency region in Fig. 4, is mainly increased by Seawater polarization loss
Caused by strong.
Different ocean temperaturesInfluence to the shield effectiveness calculated result of seawater electromagnetic shield structure shown in FIG. 1: false
If in extraneous factor, other than ocean temperature is different, remaining factor is identical,==3cm, =7cm。Temperature value point
It is not set as 10 DEG C, 20 DEG C, 30 DEG C, 40 DEG C.Obtained shield effectiveness result is as shown in figure 5, as seen from Figure 5: temperature is got over
Height causes the conductivity of seawater bigger, so that shield effectiveness enhances, can achieve different shieldings in different electromagnetic wave frequency ranges
Levels of the standard.
In conclusion it is directed to seawater electromagnetic shield proposed by the invention, it can be by adjusting ocean temperature, seawater salt
Concentration, sea water layer thickness meet the requirement of the electromagnet shield effect of different requirements.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (4)
1. a kind of seawater electromagnetic shield, it is characterized in that: including left side light-transmitting plate (1) and right side light-transmitting plate (2), the left side
Gap between light-transmitting plate (1) and right side light-transmitting plate (2) is filled by seawater (3), and the seawater (3) is used as electromagnetic shield,
It is electromagnetic radiation area on the left of the left side light-transmitting plate (1), the right side of right side light-transmitting plate (2) is electromagnetic shield regions or guard plot
Domain.
2. a kind of seawater electromagnetic shield according to claim 1, it is characterized in that: the left side light-transmitting plate (1) and the right side
Side light-transmitting plate (2) is glass.
3. a kind of seawater electromagnetic shield according to claim 2, it is characterized in that: the left side light-transmitting plate (1) and the right side
Side light-transmitting plate (2) is using the DM305 glass with low-k.
4. a kind of seawater electromagnetic shield according to claim 3, it is characterized in that: described seawater (3) the salt angle value exists
1.0-40.0 in ‰ range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811508334.4A CN109413982A (en) | 2018-12-11 | 2018-12-11 | A kind of seawater electromagnetic shield |
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| CN201811508334.4A CN109413982A (en) | 2018-12-11 | 2018-12-11 | A kind of seawater electromagnetic shield |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3109027A1 (en) * | 2020-04-03 | 2021-10-08 | Constructions Mecaniques De Normandie | Adjustable broadband radar absorber |
| CN116744667A (en) * | 2023-07-04 | 2023-09-12 | 中国人民解放军陆军工程大学 | Strong electromagnetic pulse protection device and method for salt water saturation change of photovoltaic panel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3109027A1 (en) * | 2020-04-03 | 2021-10-08 | Constructions Mecaniques De Normandie | Adjustable broadband radar absorber |
| CN116744667A (en) * | 2023-07-04 | 2023-09-12 | 中国人民解放军陆军工程大学 | Strong electromagnetic pulse protection device and method for salt water saturation change of photovoltaic panel |
| CN116744667B (en) * | 2023-07-04 | 2024-02-13 | 中国人民解放军陆军工程大学 | Strong electromagnetic pulse protection device and method for salt water saturation change of photovoltaic panel |
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