CN114274608A - Wave-absorbing stealth material capable of resisting radar scanning and application thereof - Google Patents
Wave-absorbing stealth material capable of resisting radar scanning and application thereof Download PDFInfo
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- CN114274608A CN114274608A CN202111633905.9A CN202111633905A CN114274608A CN 114274608 A CN114274608 A CN 114274608A CN 202111633905 A CN202111633905 A CN 202111633905A CN 114274608 A CN114274608 A CN 114274608A
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Abstract
The invention discloses a wave-absorbing stealth material capable of resisting radar scanning, which comprises a substrate layer, a second wave-absorbing layer, a first wave-absorbing layer and a wave-transmitting layer which are sequentially laminated; the wave-transmitting layer is of a hollow structure, and the hollow patterns are squares, circles, crosses, stars or pentagons distributed in an array; the first wave absorption layer comprises modified basalt fibers and a reinforcing material; the second wave-absorbing layer adopts continuous fiber fabric as a matrix reinforcing material, metal wires are embedded in the normal direction of the second wave-absorbing layer to serve as reinforcing ribs, and a composite material with uniform micropore distribution is embedded in the middle of the second wave-absorbing layer to serve as a filler; the first wave absorbing layer and the second wave absorbing layer are arranged according to the electromagnetic wave space transmission impedance matching principle, after electromagnetic waves are projected to penetrate through the wave transmitting layer, the electromagnetic waves are absorbed by the first wave absorbing layer and the second wave absorbing layer by layer, and the rest of the electromagnetic waves are reflected by the base layer and then absorbed again by the second wave absorbing layer and the first wave absorbing layer in the reverse direction. Therefore, the detection capability of the radar of the other side is reduced, and the identification difficulty of the radar of the other side is increased.
Description
Technical Field
The invention relates to a wave-absorbing stealth material capable of resisting radar scanning and application thereof
Background
In the prior art, the radar is used for detecting, tracking and identifying an unknown object, which is a common technical means, and particularly, the radar can play a strong role in monitoring a flight unit.
Meanwhile, researches on radar-resistant detection materials are more and more paid attention by researchers, the existing wave-absorbing stealth materials are coated on the surfaces of airplanes, missiles, airborne vehicles and the like, and the wave-absorbing stealth materials can well cope with radar detection.
However, the traditional wave-absorbing material has the defects of narrow stealth frequency band, high weight, large thickness, single wave-absorbing mechanism, low dielectric loss capacity, easiness in damage in a high-temperature environment and the like. The development of light weight and convenience of the wave-absorbing stealth material is severely restricted.
Meanwhile, in order to take account of infrared stealth and radar stealth, the composite stealth material occupies the market leading position step by step, and the composite stealth material has the advantages of strong compatibility, low cost and good stealth effect, but the existing composite stealth material has the defects of high density, complex process and unstable interlayer bonding force.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a novel wave-absorbing stealth material capable of resisting radar scanning.
A wave-absorbing stealth material capable of resisting radar scanning comprises a substrate layer, a second wave-absorbing layer, a first wave-absorbing layer and a wave-transmitting layer which are sequentially laminated;
the wave-transmitting layer is of a hollow structure, and the hollow patterns are squares, circles, crosses, stars or pentagons distributed in an array;
the first wave absorbing layer comprises modified basalt fibers and reinforcing materials, specifically comprises the steps of washing away a surface wetting agent of the basalt fibers by using an organic solvent, drying and carrying out an activation reaction with a resin material after the washing is finished, grafting a wave absorbing material on the surface of the basalt fiber material through a modifier after the reaction is finished, and meanwhile, filling a certain amount of reinforcing materials into the basalt fibers, wherein the reinforcing materials are magnetic nano materials;
the second wave-absorbing layer adopts continuous fiber fabric as a matrix reinforcing material, metal wires are embedded in the normal direction of the second wave-absorbing layer to serve as reinforcing ribs, and a composite material with uniform micropore distribution is embedded in the middle of the second wave-absorbing layer to serve as a filler;
the substrate layer comprises a plurality of carbon fiber reflecting layers, the high-toughness carbon fiber spinning is made into a single-layer carbon fiber reflecting layer through transverse and longitudinal weaving, and the plurality of carbon fiber reflecting layers are made into the substrate layer with a certain thickness through superposition and hot pressing.
Furthermore, the wave-transmitting layer is made of a plurality of single-layer plates through sintering.
Furthermore, the thickness of the wave-transmitting layer is 0.2-0.8mm, the thickness of the first wave-absorbing layer is 0.2-0.4mm, the thickness of the second wave-absorbing layer is 0.2-0.4mm, and the thickness of the substrate layer is 0.4-1.0 mm.
Further, the density of the wire is 0.5 to 1 wire/cm 2.
Furthermore, the interlayer combination mode between the substrate layer and the second wave-absorbing layer is bonding connection through low dielectric materials, and the bonding connection mode is that the low dielectric materials are injected under a vacuum condition and are bonded through a hot pressing process.
Furthermore, a reinforcing layer is arranged in the base body layer, the reinforcing layer is made of glass fiber cloth, and the thickness of the reinforcing layer is 5-8% of the total thickness.
Further, the low dielectric material is epoxy resin, polytetrafluoroethylene, polylactic acid or nylon.
Further, the composite material is a mixture of a magnetic loss system material, high silica fibers and high-temperature resistant resin, wherein the weight percentage of the high silica fibers is greater than or equal to 60%.
Has the advantages that:
the wave of 2-18GHz can be ensured to penetrate through the wave-transmitting layer as much as possible and reach the wave-absorbing layer, and meanwhile, the first wave-absorbing layer and the second wave-absorbing layer are arranged to act synergistically, so that a wider frequency band can be covered as much as possible, and radar scanning is resisted.
The first wave absorbing layer and the second wave absorbing layer are arranged according to the electromagnetic wave space transmission impedance matching principle, after electromagnetic waves are projected to penetrate through the wave transmitting layer, the electromagnetic waves are absorbed by the first wave absorbing layer and the second wave absorbing layer by layer, and the rest of the electromagnetic waves are reflected by the base layer and then absorbed again by the second wave absorbing layer and the first wave absorbing layer in the reverse direction. Therefore, the detection capability of the radar of the other side is reduced, and the capabilities of specular reflection resistance, multipath reflection resistance and cavity scattering resistance of the surface of the substrate are improved. Increasing the difficulty of identifying the radar of the other side.
Description of the drawings:
FIG. 1 is a laminated schematic structure diagram of a wave-absorbing stealth material;
1. the wave absorbing material comprises a base layer 2, a second wave absorbing layer 3, a first wave absorbing layer 4 and a wave transmitting layer.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the embodiments of the invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
The implementation example is as follows:
a wave-absorbing stealth material capable of resisting radar scanning comprises a substrate layer, a second wave-absorbing layer, a first wave-absorbing layer and a wave-transmitting layer which are sequentially laminated;
the wave-transmitting layer is of a hollow structure, and the hollow patterns are squares, circles, crosses, stars or pentagons distributed in an array; the wave-transmitting layer is made of multiple layers of metal through laser sintering and is used for radar signals to penetrate through.
The first wave absorbing layer comprises modified basalt fibers and reinforcing materials, specifically comprises the steps of washing away a surface wetting agent of the basalt fibers by using an organic solvent, drying and carrying out an activation reaction with a resin material after the washing is finished, grafting a wave absorbing material on the surface of the basalt fiber material through a modifier after the reaction is finished, and meanwhile, filling a certain amount of reinforcing materials into the basalt fibers, wherein the reinforcing materials are magnetic nano materials;
the second wave-absorbing layer comprises a matrix reinforcing material made of continuous fiber fabric, metal wires embedded in the normal direction of the second wave-absorbing layer and used as reinforcing ribs, a composite material with uniform micropore distribution and used as a filler is embedded in the middle of the second wave-absorbing layer, the composite material is a mixture of a magnetic loss system material, high silica fibers and high-temperature-resistant resin, and the weight percentage of the high silica fibers is equal to 66.7%.
The substrate layer comprises a plurality of carbon fiber reflecting layers, the high-toughness carbon fiber spinning is transversely and longitudinally woven to form a single-layer carbon fiber reflecting layer, the plurality of carbon fiber reflecting layers are overlapped and hot-pressed to form the substrate layer with certain thickness, the substrate layer is internally provided with a reinforcing layer, the reinforcing layer is made of glass fiber cloth, and the thickness of the reinforcing layer is 5-8% of the total thickness.
The interlayer combination mode between the substrate layer and the second wave-absorbing layer is bonding connection through low dielectric materials, and the bonding connection mode is that the low dielectric materials are injected under a vacuum condition and are bonded through a hot pressing process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A wave-absorbing stealthy material capable of resisting radar scanning is characterized by comprising a base layer, a second wave-absorbing layer, a first wave-absorbing layer and a wave-transmitting layer which are sequentially laminated;
the wave-transmitting layer is of a hollow structure, and the hollow patterns are squares, circles, crosses, stars or pentagons distributed in an array;
the first wave absorbing layer comprises modified basalt fibers and reinforcing materials, specifically comprises the steps of washing away a surface wetting agent of the basalt fibers by using an organic solvent, drying and carrying out an activation reaction with a resin material after the washing is finished, grafting a wave absorbing material on the surface of the basalt fiber material through a modifier after the reaction is finished, and meanwhile, filling a certain amount of reinforcing materials into the basalt fibers, wherein the reinforcing materials are magnetic nano materials;
the second wave-absorbing layer adopts continuous fiber fabric as a matrix reinforcing material, metal wires are embedded in the normal direction of the second wave-absorbing layer to serve as reinforcing ribs, and a composite material with uniform micropore distribution is embedded in the middle of the second wave-absorbing layer to serve as a filler;
the substrate layer comprises a plurality of carbon fiber reflecting layers, the high-toughness carbon fiber spinning is made into a single-layer carbon fiber reflecting layer through transverse and longitudinal weaving, and the plurality of carbon fiber reflecting layers are made into the substrate layer with a certain thickness through superposition and hot pressing.
2. The wave-absorbing stealth material capable of resisting radar scanning of claim 1, wherein the wave-transmitting layer is made of a plurality of single-layer plates through sintering.
3. The wave-absorbing stealth material capable of resisting radar scanning according to claim 1, characterized in that the thickness of the wave-transmitting layer is 0.2-0.8mm, the thickness of the first wave-absorbing layer is 0.2-0.4mm, the thickness of the second wave-absorbing layer is 0.2-0.4mm, and the thickness of the substrate layer is 0.4-1.0 mm.
4. The wave-absorbing stealth material capable of resisting radar scanning as claimed in claim 1, wherein the density of the metal wires is 0.5-1 wires/cm2。
5. The wave-absorbing stealth material capable of resisting radar scanning according to claim 1, wherein the base layer and the second wave-absorbing layer are bonded together by a low dielectric material, and the bonding is performed by injecting the low dielectric material under a vacuum condition and bonding the low dielectric material by a hot pressing process.
6. The wave-absorbing stealth material capable of resisting radar scanning as claimed in claim 1, wherein a reinforcing layer is arranged in the substrate layer, the reinforcing layer is made of glass fiber cloth, and the thickness of the reinforcing layer is 5-8% of the total thickness.
7. The wave-absorbing stealth material capable of resisting radar scanning according to claim 5, characterized in that the low dielectric material is epoxy resin, polytetrafluoroethylene, polylactic acid or nylon.
8. The wave-absorbing stealth material capable of resisting radar scanning according to claim 1, characterized in that the composite material is a mixture of a magnetic loss system material, high silica fibers and a high temperature resistant resin, wherein the weight percentage of the high silica fibers is greater than or equal to 60%.
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| CN102769197A (en) * | 2012-06-29 | 2012-11-07 | 深圳光启创新技术有限公司 | Wave-transmitting material and radome and antenna system both employing same |
| CN105799260A (en) * | 2016-03-22 | 2016-07-27 | 北京环境特性研究所 | Wave absorbing material for radar camouflage and preparation method thereof |
| CN106183315A (en) * | 2016-07-19 | 2016-12-07 | 四川航天拓鑫玄武岩实业有限公司 | A kind of infrared radar compatible type stealth material and preparation method thereof |
| CN108481756A (en) * | 2018-02-12 | 2018-09-04 | 西安工程大学 | Quasi-isotropic structure-camouflage composite material and preparation method thereof in a kind of face |
| CN108819384A (en) * | 2018-05-28 | 2018-11-16 | 中南大学 | A kind of electromagnetism fiber absorbing material of multilayered structure and preparation method thereof |
| CN110650603A (en) * | 2019-09-10 | 2020-01-03 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN113352706A (en) * | 2021-06-15 | 2021-09-07 | 武汉中科先进技术研究院有限公司 | Basalt fiber structural wave-absorbing composite material and preparation method thereof |
| CN113524820A (en) * | 2021-06-24 | 2021-10-22 | 南京玻璃纤维研究设计院有限公司 | Wave-absorbing composite material and preparation method thereof |
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2021
- 2021-12-29 CN CN202111633905.9A patent/CN114274608A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769197A (en) * | 2012-06-29 | 2012-11-07 | 深圳光启创新技术有限公司 | Wave-transmitting material and radome and antenna system both employing same |
| CN105799260A (en) * | 2016-03-22 | 2016-07-27 | 北京环境特性研究所 | Wave absorbing material for radar camouflage and preparation method thereof |
| CN106183315A (en) * | 2016-07-19 | 2016-12-07 | 四川航天拓鑫玄武岩实业有限公司 | A kind of infrared radar compatible type stealth material and preparation method thereof |
| CN108481756A (en) * | 2018-02-12 | 2018-09-04 | 西安工程大学 | Quasi-isotropic structure-camouflage composite material and preparation method thereof in a kind of face |
| CN108819384A (en) * | 2018-05-28 | 2018-11-16 | 中南大学 | A kind of electromagnetism fiber absorbing material of multilayered structure and preparation method thereof |
| CN110650603A (en) * | 2019-09-10 | 2020-01-03 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN113224544A (en) * | 2019-09-10 | 2021-08-06 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN113352706A (en) * | 2021-06-15 | 2021-09-07 | 武汉中科先进技术研究院有限公司 | Basalt fiber structural wave-absorbing composite material and preparation method thereof |
| CN113524820A (en) * | 2021-06-24 | 2021-10-22 | 南京玻璃纤维研究设计院有限公司 | Wave-absorbing composite material and preparation method thereof |
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