CN210441746U - Wallboard of radar invisible shelter - Google Patents
Wallboard of radar invisible shelter Download PDFInfo
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- CN210441746U CN210441746U CN201921216250.3U CN201921216250U CN210441746U CN 210441746 U CN210441746 U CN 210441746U CN 201921216250 U CN201921216250 U CN 201921216250U CN 210441746 U CN210441746 U CN 210441746U
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Abstract
The utility model belongs to the technical field of the shelter, specific saying relates to a wallboard of stealthy shelter of radar. The main technical scheme is as follows: the radar invisible shelter wallboard is mainly composed of a wave-absorbing outer layer made of short carbon fibers and carbon fiber fabric mixed prepreg and a wave-absorbing inner layer composed of aramid fiber honeycomb plates, wherein the wave-absorbing outer layer is provided with a wave-transmitting skin composed of glass fiber reinforced polytetrafluoroethylene. The wall plate of the radar invisible shelter has excellent radar detection stealth performance, has a remarkable shielding effect on electromagnetic waves, and has the characteristics of good heat preservation and heat insulation performance.
Description
Technical Field
The utility model belongs to the technical field of the shelter, specific saying relates to a wallboard of stealthy shelter of radar.
Background
The shelter is from military terminology of the united states army and is a mobile unit organically assembled from various solid materials. The shelter is a structure similar to a container, can be transported by a truck, provides a proper environment for equipment and personnel in the shelter, and can be used as a field command center, an air defense radar system, an electronic equipment system, an environment monitoring shelter, a weather shelter, a hospital shelter, a mobile combination house and the like.
The wallboard of the traditional shelter is generally formed by compounding an aluminum alloy plate serving as an inner mask, an outer mask and a polyurethane foam sandwich, and does not have a stealth effect on radar detection; the wall plate thereof cannot necessarily shield electromagnetic wave radiation; or only one layer of wave-absorbing material is used for manufacturing, the stealth effect is not obvious, the radar stealth and the electromagnetic shielding are in a pair of contradiction, and no shelter which has both stealth effect on radar detection and electromagnetic wave radiation interference resistance can be used by armies.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stealthy performance is surveyed to lightning protection that has excellence, has apparent shielding effect to the electromagnetic wave, has the wallboard of the stealthy shelter of radar of good heat preservation and heat-proof quality simultaneously.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a wallboard of stealthy shelter of radar, mainly by including short carbon fiber and carbon fiber fabric mixed prepreg make inhale the ripples inlayer that ripples outer and aramid fiber honeycomb panel constitute and constitute, inhale the ripples skin that passes through that the outer glass fiber reinforcement polytetrafluoroethylene that sets up of ripples constitutes.
The wall plate of the invisible radar shelter is characterized by further comprising the following technical characteristics:
the wave-transparent skin, the wave-absorbing outer layer and the wave-absorbing inner layer are molded by pasting glue or pressure molding of viscous media;
a wave-absorbing enhancement layer formed by a barium ferrite hollow ceramic microsphere coating is arranged between the wave-transmitting skin and the wave-absorbing outer layer and/or between the wave-absorbing outer layer 1 and the wave-absorbing inner layer;
a heat insulation skin is arranged on the inner surface of the wave-absorbing inner layer, and the heat insulation skin is a low-density polyurethane rigid foam board;
the heat insulation skin and the wave-absorbing inner layer are provided with metal electromagnetic shielding layers, and the electromagnetic shielding layers are made of conductive silicone rubber taking copper-coated nickel powder as a conductive filling medium.
The utility model provides a wallboard of stealthy shelter of radar compares with prior art, has following advantage: the bulkhead plate is provided with a sandwich main body structure which is formed by a wave-absorbing outer layer made of short carbon fiber and carbon fiber fabric mixed prepreg and a wave-absorbing inner layer formed by an aramid fiber honeycomb plate, and is also provided with a wave-transmitting skin formed by glass fiber reinforced polytetrafluoroethylene on the wave-absorbing outer layer, so that radar electromagnetic waves are better permeated and absorbed, the energy of radar waves is consumed to the maximum extent, the generation of radar echoes is reduced or the incomplete radar echoes are reduced, the probability of detection by a radar is greatly reduced, and the glass fiber reinforced polytetrafluoroethylene has good impact resistance and wear resistance and plays a role in protecting the structure of the bulkhead; secondly, as the wave-absorbing enhancement layer formed by the barium ferrite hollow ceramic bead coating is arranged between the wave-transmitting skin and the wave-absorbing outer layer and/or between the wave-absorbing outer layer and the wave-absorbing inner layer, the shelter wall plate has good heat insulation effect and high heat reflection performance on the basis of improving the energy of absorbed radar waves, and the convection and radiation of heat energy inside and outside the shelter can be well isolated; and thirdly, the metal electromagnetic shielding layers are arranged on the heat insulation skin and the wave-absorbing inner layer, so that the transmission path of electromagnetic waves is cut off, interference is eliminated, the electromagnetic shielding layers are made of conductive silicone rubber taking copper-coated nickel powder as a conductive filling medium, and the shielding effect is obvious.
Drawings
Fig. 1 is the utility model relates to a wallboard structure sketch map of stealthy shelter of radar.
Detailed Description
The structure and the working principle of the invisible radar shelter wallboard provided by the invention are further described in detail with reference to the accompanying drawings.
Referring to fig. 1, it is a schematic structural view of the invisible shelter wall plate for radar according to the present invention. The structure of the radar invisible shelter wallboard mainly comprises a wave-absorbing outer layer 1 made of short carbon fibers and carbon fiber fabric mixed prepreg and a wave-absorbing inner layer 2 formed by aramid fiber honeycomb plates, wherein the wave-absorbing outer layer 1 is provided with a wave-transmitting skin 3 formed by glass fiber reinforced polytetrafluoroethylene.
The working principle is as follows: respectively laying carbon fiber fabrics (layer felts) on the upper surface and the lower surface of the chopped carbon fibers (carbon fiber yarns), adding epoxy resin, accelerant and the like, mixing and presoaking, heating and curing after preforming, and cutting into sheets to form the wave-absorbing outer layer 1; preparing an aramid fiber reinforced resin-based material into a sheet, and preparing the sheet into a honeycomb core to form an aramid fiber honeycomb plate of the wave-absorbing inner layer 2; and arranging a wave-transmitting skin 3 formed by glass fiber reinforced polytetrafluoroethylene on the surface of the wave-absorbing outer layer 1, and pressurizing and shaping the plate obtained in the steps to obtain the shelter wall plate with the radar stealth function.
In the structure constituting the wall panel of the radar concealed shelter described above,
in order to facilitate processing and manufacturing, the wave-transparent skin 3, the wave-absorbing outer layer 1 and the wave-absorbing inner layer 2 are formed by pasting and gluing or pressure forming of viscous media, production operation is simple and clear, manufacturing efficiency is improved, the wave-transparent skin 3 can improve radar wave permeability by more than 95%, and radar wave energy can be consumed to the maximum extent through a composite wave-absorbing sandwich structure after entering the interior of a wall plate, the radar scattering sectional area of the wall plate is reduced, and the stealth performance of the shelter is improved;
preferably, a wave-absorbing enhancement layer 4 formed by a barium ferrite hollow ceramic microsphere coating is arranged between the wave-transmitting skin 3 and the wave-absorbing outer layer 1 and/or between the wave-absorbing outer layer 1 and the wave-absorbing inner layer 2, and the barium ferrite hollow ceramic microspheres as a novel wave-absorbing material have excellent wave-absorbing performance and application prospect;
for example, in the Y-type barium ferrite hollow ceramic microsphere in the prior art, when the thickness is 2.19mm in the range of 2-18 GHz, the lowest reflectivity is-27.52 dB, the corresponding frequency is 12.93GHz, and the bandwidth with the reflectivity less than-10 dB is 2.54GHz (12.05-14.59 GHz);
when the W-type barium ferrite hollow ceramic microspheres are adopted in the range of 2-18 GHz and the thickness is 3.05mm, the lowest reflectivity can reach-42.55 dB, the corresponding frequency is 10.91GHz, and the absorption bandwidth smaller than-10 dB is 2.10GHz (9.86-11.96 GHz);
after heat treatment is carried out on Zn-Ti barium ferrite hollow ceramic microspheres, the lowest reflectivity can reach-21.98 dB in the range of 2-18 GHz and the thickness of 2mm, the corresponding frequency is 13.36GHz, and the absorption bandwidth smaller than-10 dB is 2.02GHz (11.87-13.89 GHz);
in order to further enhance the heat insulation performance of the shelter wall plate, a heat insulation skin 5 is arranged on the inner surface of the upper wave-absorbing inner layer 2, the heat insulation skin 5 is a low-density polyurethane hard foam board, the density is not more than 0.05g/cm3, the good heat insulation effect is achieved, and convection and radiation of heat energy inside and outside the shelter are isolated;
in order to enhance the electromagnetic shielding performance of the shelter wall plate, the heat insulation skin 5 and the wave absorption inner layer 2 are provided with the metal electromagnetic shielding layers 6, when the shelter wall plate is spliced into a shelter structure, the electromagnetic shielding layers 6 in the wall plate are connected into a whole to form a shielding net structure, preferably, the electromagnetic shielding layers 6 are formed by conductive silicone rubber taking copper-coated nickel powder as a conductive filling medium, and the nickel-coated copper powder is the most ideal conductive filling material of the conductive silicone rubber at present, has high cost performance, excellent conductive performance and electromagnetic wave shielding performance, has good oxidation resistance when the conductive rubber is formed at high temperature, and has quite long service life in various environments and corrosion resistance (salt spray test).
Claims (4)
1. The utility model provides a wallboard of stealthy shelter of radar which characterized in that: the wave-absorbing composite material is mainly composed of a wave-absorbing outer layer made of short carbon fibers and carbon fiber fabric mixed prepreg and a wave-absorbing inner layer formed by an aramid fiber honeycomb plate, wherein the wave-absorbing outer layer is provided with a wave-transmitting skin made of glass fiber reinforced polytetrafluoroethylene, and a wave-transmitting enhancement layer formed by a barium ferrite hollow ceramic microsphere coating is arranged between the wave-transmitting skin and the wave-absorbing outer layer and/or between the wave-absorbing outer layer and the wave-absorbing inner layer.
2. The wall panel of a radar stealth shelter according to claim 1, wherein: the wave-transmitting skin, the wave-absorbing outer layer and the wave-absorbing inner layer are formed by gluing or pressure forming of viscous media.
3. The wall panel of a radar stealth shelter according to claim 1, wherein: and a heat insulation skin is arranged on the inner surface of the wave-absorbing inner layer, and the heat insulation skin is a low-density polyurethane rigid foam board.
4. The wall panel of a radar stealth shelter according to claim 3, wherein: a metal electromagnetic shielding layer is arranged between the heat insulation skin and the wave absorbing inner layer, and the electromagnetic shielding layer is composed of conductive silicone rubber taking copper-coated nickel powder as a conductive filling medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921216250.3U CN210441746U (en) | 2019-07-31 | 2019-07-31 | Wallboard of radar invisible shelter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921216250.3U CN210441746U (en) | 2019-07-31 | 2019-07-31 | Wallboard of radar invisible shelter |
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| Publication Number | Publication Date |
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| CN210441746U true CN210441746U (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921216250.3U Active CN210441746U (en) | 2019-07-31 | 2019-07-31 | Wallboard of radar invisible shelter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969330A (en) * | 2020-07-31 | 2020-11-20 | 航天科工武汉磁电有限责任公司 | Radar wave-absorbing material with unit structure pattern and preparation method thereof |
| CN114053064A (en) * | 2020-07-29 | 2022-02-18 | 砺剑防务技术集团有限公司 | Square cabin with wave-absorbing coating |
-
2019
- 2019-07-31 CN CN201921216250.3U patent/CN210441746U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114053064A (en) * | 2020-07-29 | 2022-02-18 | 砺剑防务技术集团有限公司 | Square cabin with wave-absorbing coating |
| CN111969330A (en) * | 2020-07-31 | 2020-11-20 | 航天科工武汉磁电有限责任公司 | Radar wave-absorbing material with unit structure pattern and preparation method thereof |
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