CN105401535A - Anti-electromagnetic radiation noise barrier plate - Google Patents
Anti-electromagnetic radiation noise barrier plate Download PDFInfo
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- CN105401535A CN105401535A CN201510982668.5A CN201510982668A CN105401535A CN 105401535 A CN105401535 A CN 105401535A CN 201510982668 A CN201510982668 A CN 201510982668A CN 105401535 A CN105401535 A CN 105401535A
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- 230000004888 barrier function Effects 0.000 title claims abstract description 22
- 230000005855 radiation Effects 0.000 title claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 14
- 239000004411 aluminium Substances 0.000 claims description 16
- 230000009467 reduction Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 20
- 230000005670 electromagnetic radiation Effects 0.000 abstract description 14
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 11
- 230000030279 gene silencing Effects 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract 4
- 238000010422 painting Methods 0.000 abstract 1
- 230000005291 magnetic effect Effects 0.000 description 38
- 230000005684 electric field Effects 0.000 description 26
- 239000004020 conductor Substances 0.000 description 21
- 239000003302 ferromagnetic material Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0064—Perforated plate or mesh, e.g. as wall facing
- E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention provides an anti-electromagnetic radiation noise barrier plate. The anti-electromagnetic radiation noise barrier plate comprises a panel, a back plate, and a composite filler positioned between the panel and the back plate; and electrostatic painting layers are respectively arranged on one surfaces, far from the composite filler, of the panel and the back plate. The panel is an aluminum plate having a plurality of through holes in the surface; the back plate is a flat aluminum plate; the composite filler comprises a silencing layer, a metal net cover layer and at least two layers of aluminum shielding covers arranged in sequence from outside to inside; and the internal parts of the aluminum shielding covers are cavities. According to the design of the anti-electromagnetic radiation noise barrier plate, the panel faces a noise and electromagnetic radiation source; the holes of the panel achieve a primary noise isolating effect; as the cavities are formed in the composite filler, external composite layers are both double-layer structures positioned on the two sides of the cavities; the noise is gradually reduced through the silencing layer; and then, the electrostatic shielding, the magnetostatic shielding and the electromagnetic shielding are respectively performed on electromagnetic radiation through the metal net cover layer and the aluminum shielding layers. The anti-electromagnetic radiation noise barrier plate is simple in structure, prominent in effect and rich in practicability.
Description
Technical field
The present invention relates to a kind of sound barrier panel, be specifically related to a kind of anti-electromagnetic radiation sound barrier panel.
Background technology
Along with the progress of society and the development in city, urban traffic has become the most closely-related problem with us.It is convenient greatly that the operation of magnetic suspension train brings to the trip of people, also inevitably brings electromagnetic radiation simultaneously, and harm people's is healthy, causes disease.
Electromagnetic radiation is a kind of electromagnetic wave of compound, with orthogonal Electric and magnetic fields transferring energy over time.Human life activity comprises a series of bioelectric, and these biological electricity are very responsive to the electromagnetic wave of environment, and therefore, electromagnetic radiation can impact human body and damage.
Electromagnetic radiation, to the harm of human body, shows as fuel factor and non-thermal effect two broad aspect.
Fuel factor: human body more than 70% is water, is subject to phase mutual friction after electromagenetic wave radiation, causes body to heat up, thus have influence on the normal work of intracorporeal organ.Body temperature raises and causes various symptom, as palpitaition, alliteration, insomnia, bradycardia, Neuroleptic Leukocytopenia, and immunologic function decline, visual impairment etc.Produce the electromagnetic wave power density of thermal effect at 10MW/CM
2; Microcosmic thermal effect 1MW-MW/CM
2; Shallow thermal effect is at 10MW/CM
2below.When power is the microwave direct irradiation people of 1000W, can in several seconds causing death.
Non-thermal effect: the Organ and tissue of human body all exists faint electromagnetic field, they are stable and orderly, once be subject to the interference of external electromagnetic field, the weak electromagnetic field being in equilibrium state will be destroyed, and human body also can sustain damage.This mainly low-frequency electromagnetic wave produce impact, namely human body is by after electromagnetic radiation irradiation, body temperature does not obviously raise, but disturb the intrinsic weak electromagnetic field of human body, blood, lymph liquid and cellular plasm are changed, serious harm is caused to human body, fetal anomaly or pregnant woman's spontaneous abortion can be caused; Affect the circulation of human body, immunity, reproduction and metabolic function etc.
Summary of the invention
Goal of the invention: the invention solves the problem that existing sound barrier panel does not have concrete anti-electromagnetic radiation function, solves the problem that the prevention for the different sorting item of electromagnetic radiation does not propose simultaneously.
Technical scheme: for achieving the above object, the invention provides following technical scheme: a kind of anti-electromagnetic radiation sound barrier panel, what comprise panel, backboard and be positioned between panel and backboard is composite filled, described panel is the aluminium sheet that plate face is provided with some through holes, backboard is dull and stereotyped aluminium sheet, describedly composite filledly comprise the noise reduction layer, wire lath cap layer and at least two-layer aluminium radome that set gradually from outside to inside, described aluminium radome inside is cavity.
As optimization, described panel and backboard are equipped with one deck electrostatic enamelled coating away from composite filled one side.
As optimization, on described panel, the aperture of through hole is 1.5 ~ 3mm.
As optimization, described wire lath cap layer is mesh-like guard.
As optimization, described wire lath cap layer is copper/aluminium guard layer.
As optimization, described wire lath cap layer ground connection.
Beneficial effect: the present invention compared with prior art: prior art does not have the introduction of shaping anti-electromagnetic radiation sound barrier panel, the application is by planning the classification of electromagnetic radiation, simultaneously according to the dissimilar inhomogeneous precautionary measures of electromagnetic radiation relative set, make to be applied to the function that the larger sound barrier panel of the noises such as high ferro circuit can have anti-electromagnetic radiation concurrently simultaneously, structure of the present invention is simple, cost is low, is imbued with practicality.
Accompanying drawing explanation
Fig. 1 is cross section structure schematic diagram of the present invention;
Fig. 2 is the structural representation of panel of the present invention;
Fig. 3 is that the sound barrier panel of prior art is for electromagnetic radiation decibel/frequency diagram;
Fig. 4 position adopts sound barrier panel of the present invention for electromagnetic radiation decibel/frequency diagram.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of anti-electromagnetic radiation sound barrier panel, what comprise panel 1, backboard 2 and be positioned between panel 1 and backboard 2 is composite filled, described panel 1 is the aluminium sheet that plate face is provided with some through holes 3, backboard is dull and stereotyped aluminium sheet, describedly composite filledly comprise the noise reduction layer 4, wire lath cap layer 5 and the two-layer aluminium radome 6 that set gradually from outside to inside, described aluminium radome 6 inside is cavity 8.Described noise reduction layer 4 is the silencing means such as existing muffler with metal shell or chip noise damper.
Described panel 1 and backboard 2 are equipped with one deck electrostatic enamelled coating 7 away from composite filled one side.
On described panel, the aperture of through hole 3 is 1.5 ~ 3mm.
Described wire lath cap layer 5 is mesh-like guard.
Described wire lath cap layer 5 is copper/aluminium guard layer.
Whether described panel 1 also can select ground connection according to actual conditions with backboard 2.
Described wire lath cap layer 5 ground connection.Ground connection is for can arrange according to actual conditions herein, and grounded part is not shown.
How our concrete elaboration below obtains conclusion of the present invention:
The present invention has done deep research to electromagnetic radiation, a large amount of test and studies has been done to the Kelvin effect of the electromagnetic radiation of different frequency, change frequency, change material, change the parameters such as the thickness of material, obtain a large amount of experimental datas, obtain corresponding shielding curve by analysis and summary.
Magnetic field barrier
Magnetic field can not resemble the shielding problem in conductively-closed magnetic field electric field in theory, is a problem not only having had practical significance but also had theory significance.According to the difference of condition, the shielding of electromagnetic field can be divided into electrostatic screen, magnetic shielding and electromagnetic shielding three kinds of situations, and these three kinds of situations had both had the difference of matter, has again inherent contact, can not obscure.
Electrostatic screen:
Under state of electrostatic equilibrium, no matter be hollow conductor or solid conductor; No matter how much charged conductor itself is, or whether conductor is in external electric field, and must be equipotentiality body, its inner field intensity be zero, and this is the theoretical foundation of electrostatic screen.Because the electric field closed in conductor shell has typical meaning and practical significance, we do some for the electric field in closed conductor shell to electrostatic screen and discuss.
(1) conductor shell internal electric field is closed not by shell exterior charging or electric field influence.
As having electric charge q outside shell without electrical body in shell, then electrostatic induction makes shell outer wall charged.During electrostatic equilibrium, shell is interior without electric field.This is not say that shell exterior charging does not produce electric field in shell, root generating field.Because shell outer wall induces heterocharge, the conjunction field intensity that they and q space any point in shell excites is zero.Thus conductor shell inside can not be subject to the impact of shell exterior charging q or other electric fields.The charge inducing of shell outer wall plays autoregulation.If above-mentioned cavity conductor casing ground connection, then on shell, induced positive will flow into underground along grounding wire.Cavity conductor and the earth equipotentiality after electrostatic equilibrium, in cavity, field intensity is still zero.If have electric charge in cavity, then cavity conductor still with ground equipotentiality, without electric field in conductor.At this moment because cavity inner wall has contrary sign charge inducing, therefore electric field is had in cavity.This electric field by shell electric charge produce, shell exterior charging on shell internal electric field still without affect.
From discussing above, no matter whether close conductor shell ground connection, internal electric field does not affect by shell exterior charging.
(2) ground connection closes conductor shell external electrical field not by the impact of electric charge in shell.
As shell internal cavity has electric charge q, because electrostatic induction, shell inwall is with equivalent heterocharge, and shell outer wall is with the same class electric charge, and the shell external space has electric field to exist, and this electric field can be described as and indirectly produced by electric charge q in shell.Alternatively directly produced by the outer charge inducing of shell.If but by the earthing of casing, then shell exterior charging will disappear, in shell, electric charge q and inwall charge inducing produce electric field outward at shell will be zero.If electric charge to be made in shell on shell external electric field without impact visible, must by the earthing of casing.These are different from the first situation.
Here also notably:
1. we say that ground connection will eliminate shell exterior charging, but are not charged all scarcely at any situation shell outer wall.If have electrical body outside shell, then shell outer wall still may be charged, no matter and whether have electric charge in shell.
2. in practical application, metal shell need not be strictly completely closed, replaces metal shell also can reach similar electrostatic shield effect, although this shielding is not completely, thoroughly with metal net mask.
3., when electrostatic equilibrium, be without flow of charge in grounding wire, but if the electric charge in the shell of conductively-closed changes in time, or the electric charge time to time change of the outer neighbouring electrical body of shell, will make there is electric current in grounding wire.Also may there is residual charge in radome, at this moment shielding action will be again that incomplete sum is halfway.
In a word, no matter whether close conductor shell ground connection, internal electric field is not by shell exterior charging and electric field influence; Ground connection closes conductor shell external electric field not by the impact of electric charge in shell.This phenomenon, is electrostatic screen.Electrostatic screen has the meaning of two aspects:
First practical significance: shielding makes the instrument in metallic conductor shell or working environment not be subject to external electric fields, does not also have an impact to external electrical field.Some electronic device or measureing equipment, in order to exempt interference, all will carry out electrostatic screen, as metal cap or the closeer metal net mask of ground connection on indoor high-tension apparatus cover, and electron tube Can.And for example make the power transformer of full-wave rectification or bridge rectifier, between armature winding and secondary windings, wrap sheet metal or make it ground connection around last layer enamel-covered wire, reach shielding action.In high-voltage hot-line work, workman puts on all forcing to submit of being made into wire or conductive fiber, can play shielding protection effect to human body.In electrostatic experiment, because there is the vertical electric field of about 100V/m near the earth.Get rid of the effect of this electric field to electronics, the only motion under gravity of research electronics, then must there is eE < meg, E < 10-10V/m can be calculated, this is one does not almost have electrostatic field " electrostatic vacuum ", and this only has and carries out electrostatic screen to evacuated cavity and could realize.In fact, the electrostatic screen realized by a closed conductor cavity is very effective.
It two is theory significances: indirect verification Coulomb's law.Gauss theorem can be derived from Coulomb's law, if the inverse square index in Coulomb's law is not equal to 2 must not go out Gauss theorem.Otherwise, if demonstrate Gauss theorem, just prove the correctness of Coulomb's law.According to Gauss theorem, the field intensity of insulated metal spherical shell inside should be zero, and this is also the conclusion of electrostatic screen.If detect whether charged in shielding case with instrument, carry out according to measurement result analyzing the correctness that just can judge Gauss theorem, also just demonstrate the correctness of Coulomb's law.Nearest experimental result is that the people such as Williams completed in 1971, points out in formula F=q1q2/r2 ± δ, δ < (2.7 ± 3.1) × 10-16,
In the visible experimental precision that can reach in present stage, the inverse square relation of Coulomb's law is strict establishment.From the viewpoint of practical application, we can think that it is correct.
Magnetic shielding:
Magnetostatic field is the magnetic field that steady current or permanent magnet produce.Magnetic shielding utilizes the ferromagnetic material of high magnetic permeability μ to make radome to shield external magnetic field.It is similar from electrostatic screen effect and have different.
The principle of magnetic shielding can illustrate by the concept of magnetic circuit.As ferromagnetic material made the loop in cross section, then in outside magnetic field, exhausted most magnetic field concentration is in ferromagnetic circuit.This can analyze the air in ferromagnetic material and cavity as parallel circuits.Because the magnetic conductivity of ferromagnetic material is than the magnetic conductivity several thousand times greatly of air, the magnetic resistance of the magneto resistive ratio ferromagnetic material of cavity is much bigger, and the exhausted major part of the line of magnetic induction of external magnetic field will be passed through in ferromagnetic material wall, and the magnetic flux entering cavity is few.Like this, just be there is no external magnetic field by the cavity that ferromagnetic material shields, thus reach the object of magnetic shielding.The magnetic conductivity of material is higher, and barrel is thicker, and shield effectiveness is just more remarkable.Ferromagnetic material such as soft iron, silicon steel, the permalloy high because of conventional magnetic conductivity do screen layer, therefore magnetic shielding is named ferro-magnetic shield again.Magnetic shielding has a wide range of applications in electronic device.The leakage magnetic flux that such as transformer or other coils produce to the motion generation effect of electronics, can affect the focusing of electron beam in oscilloscope tube or kinescope.In order to improve the quality of instrument or product, the parts producing leakage magnetic flux must be carried out magnetic shielding.In wrist-watch, just demagnetizing effect can be played at core housing with soft iron shell.
Point out above, the effect of electrostatic screen is extraordinary.This is because the electrical conductivity of metallic conductor tens orders of magnitude larger than the electrical conductivity of air, and the difference of the magnetic conductivity of ferromagnetic material and air only has several order of magnitude, about greatly several thousand times usually.So magnetic shielding some leakage field total.In order to reach better shield effectiveness, can multilayer screen be adopted, the residual magnetic flux amount of leaking enter in cavity is masked one after another.So respond well magnetic screen is general all heavier.But, if will manufacture absolute " magnetostatic vacuum ", then can utilize the Meisser effect of superconductor.Be placed in external magnetic field by one piece of superconductor, the magnetic induction density B in its body is zero forever.Superconductor is complete diamagnetic body, has optimal magnetic shielding effect, but can't generally apply at present.
Electromagnetic shielding:
When electromagnetic field is propagated in conducting medium, it is measured the increase of the amplitude distance of (E and H) and exponentially decays.From the viewpoint of energy, when electromagnetic wave is propagated in conducting medium, there is energy loss, therefore, show as the reduction of field amount amplitude.The field amount of conductive surface is maximum, more gos deep into conductor, and field amount is less.This phenomenon is also referred to as Kelvin effect.Utilize Kelvin effect that frequency electromagnetic waves can be stoped to penetrate good conductor and be made electromagnetic screen.It has more universal significance than electrostatic, magnetic shielding.
Electromagnetic shielding suppresses interference, the reliability strengthening equipment and the effective means of improving the quality of products.Reasonably use electromagnetic shielding, the interference of external frequency electromagnetic waves can be suppressed, also can avoid going to affect other equipment as interference source.As in radio, with aluminium radome outside coil, it is made not to be subject to the interference of extraneous time-varying field thus to avoid noise.Audio frequency feeder line shielding line is also this reason.Oscilloscope tube iron sheet encloses, and is also the scanning in order to make stray EM field not affect electron ray.The frequency electromagnetic waves that element in metal shielding inside or equipment produce thoroughly does not go out metal-back yet and unlikelyly affects external equipment.
Claims (6)
1. an anti-electromagnetic radiation sound barrier panel, it is characterized in that: what comprise panel, backboard and be positioned between panel and backboard is composite filled, described panel is the aluminium sheet that plate face is provided with some through holes, backboard is dull and stereotyped aluminium sheet, describedly composite filledly comprise the noise reduction layer, wire lath cap layer and at least two-layer aluminium radome that set gradually from outside to inside, described aluminium radome inside is cavity.
2. anti-electromagnetic radiation sound barrier panel according to claim 1, is characterized in that: described panel and backboard are equipped with one deck electrostatic enamelled coating away from composite filled one side.
3. anti-electromagnetic radiation sound barrier panel according to claim 1, is characterized in that: on described panel, the aperture of through hole is 1.5 ~ 3mm.
4. anti-electromagnetic radiation sound barrier panel according to claim 1, is characterized in that: described wire lath cap layer is mesh-like guard.
5. anti-electromagnetic radiation sound barrier panel according to claim 1, is characterized in that: described wire lath cap layer is copper/aluminium guard layer.
6. anti-electromagnetic radiation sound barrier panel according to claim 1, is characterized in that: described wire lath cap layer ground connection.
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| CN201510982668.5A CN105401535B (en) | 2015-12-24 | 2015-12-24 | A kind of anti-electromagnetic radiation sound barrier panel |
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| CN201510982668.5A CN105401535B (en) | 2015-12-24 | 2015-12-24 | A kind of anti-electromagnetic radiation sound barrier panel |
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| CN105401535B CN105401535B (en) | 2017-12-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108966624A (en) * | 2018-08-29 | 2018-12-07 | 合肥本源量子计算科技有限责任公司 | A kind of quantum chip packaging device |
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| DE102008031859A1 (en) * | 2008-07-05 | 2010-01-07 | Frei, Johann H. | Traffic noise absorption panel has outer noise absorption panel consisting of two layers with hard foam panel |
| CN201679106U (en) * | 2010-03-25 | 2010-12-22 | 上海申华声学装备有限公司 | Suction separation type multilayer cavity straight plate type sound barrier |
| CN201730231U (en) * | 2010-06-28 | 2011-02-02 | 四川正升声学科技有限公司 | Compound electromagnetic shielding and noise-absorbing module |
| CN203807964U (en) * | 2014-04-16 | 2014-09-03 | 上海然贝声学环保工程有限公司 | Sound barrier for urban rail transit |
| CN204626682U (en) * | 2015-03-25 | 2015-09-09 | 周辉 | A kind of combined type sound barrier |
| CN205443982U (en) * | 2015-12-24 | 2016-08-10 | 江苏远兴环保集团有限公司 | Anti -electromagnetic radiation sound -screen baffle |
-
2015
- 2015-12-24 CN CN201510982668.5A patent/CN105401535B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008031859A1 (en) * | 2008-07-05 | 2010-01-07 | Frei, Johann H. | Traffic noise absorption panel has outer noise absorption panel consisting of two layers with hard foam panel |
| CN201679106U (en) * | 2010-03-25 | 2010-12-22 | 上海申华声学装备有限公司 | Suction separation type multilayer cavity straight plate type sound barrier |
| CN201730231U (en) * | 2010-06-28 | 2011-02-02 | 四川正升声学科技有限公司 | Compound electromagnetic shielding and noise-absorbing module |
| CN203807964U (en) * | 2014-04-16 | 2014-09-03 | 上海然贝声学环保工程有限公司 | Sound barrier for urban rail transit |
| CN204626682U (en) * | 2015-03-25 | 2015-09-09 | 周辉 | A kind of combined type sound barrier |
| CN205443982U (en) * | 2015-12-24 | 2016-08-10 | 江苏远兴环保集团有限公司 | Anti -electromagnetic radiation sound -screen baffle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108966624A (en) * | 2018-08-29 | 2018-12-07 | 合肥本源量子计算科技有限责任公司 | A kind of quantum chip packaging device |
| CN108966624B (en) * | 2018-08-29 | 2023-10-10 | 本源量子计算科技（合肥）股份有限公司 | Quantum chip packaging device |
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| Publication number | Publication date |
|---|---|
| CN105401535B (en) | 2017-12-22 |
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