CN110095022B - Double-effect infrared stealth structure - Google Patents
Double-effect infrared stealth structure Download PDFInfo
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- CN110095022B CN110095022B CN201910415174.7A CN201910415174A CN110095022B CN 110095022 B CN110095022 B CN 110095022B CN 201910415174 A CN201910415174 A CN 201910415174A CN 110095022 B CN110095022 B CN 110095022B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H3/00—Camouflage, i.e. means or methods for concealment or disguise
Abstract
The invention relates to a double-effect infrared stealth structure which comprises a substrate layer, wherein a resonant cavity is arranged in the substrate layer, a vacuum cavity layer is arranged above the resonant cavity, and an outer protection layer is arranged above the vacuum cavity layer; the double-effect infrared stealth structure is arranged. The vacuum cavity can prevent the diffusion and the transmission of heat, and the thermal radiation can be prevented from being transmitted by arranging the resonance resonant cavity, so that the equipment is isolated from the infrared in two aspects, and the infrared stealth function of the equipment can be realized.
Description
Technical Field
The invention belongs to the technical field of infrared detection, and particularly relates to a double-effect infrared stealth structure.
Background
With the rapid development of electronic information technology and its wide application in the military field, military reconnaissance means have been highly technically implemented. Under the situation that a battlefield target can be found and hit, the infrared imager is made to appear, so that the visible light and radar stealth technology which is effective once faces the threat of being cracked. When the atmospheric condition is good, the detection distance of the airborne infrared searching and tracking system to the target can exceed 80 km. Therefore, on the basis of visible light and radar band stealth, infrared is a necessary trend of future full-band stealth technology development.
In recent years, the development of high precision, intellectualization and diversification of infrared detection means provides higher challenges for infrared stealth technology. Infrared stealth technology, as a military anti-reconnaissance technology, achieves low detectability of targets, primarily by suppressing thermal radiation of the targets in the infrared atmospheric window bands (3-5 μm and 8-14 μm). At present, the stealth of infrared detection is mainly realized by reducing or changing the infrared radiation characteristics of a target through cooling, shielding, stealth coating and other means, wherein the coating of a low-emissivity material on the surface of the target is most widely applied. However, the low-emissivity infrared stealth paint has a series of problems of heat accumulation, limited frequency band range, short service life and the like, so that the exploration and development of high-performance infrared stealth materials and technologies are urgent.
Disclosure of Invention
The invention aims to provide a double-effect infrared stealth structure which comprises a substrate layer, wherein a resonant cavity is arranged in the substrate layer, a vacuum cavity layer is arranged above the resonant cavity, and an outer protection layer is arranged above the vacuum cavity layer.
The resonant cavity comprises a first metal layer, a filling layer and a second metal layer, the second metal layer is arranged above the substrate layer, the first metal layer is arranged below the vacuum cavity layer, and the filling layer is filled in a gap between the first metal layer and the second metal layer.
The second metal layer comprises a plurality of metal strips which are arranged periodically.
The distance between the metal strips is 50-60 nm.
The spacing of the metal strips is 60 nm.
The vacuum cavity layer is provided with a plurality of layers of vacuum cavities.
The substrate layer is made of polymethyl methacrylate.
The distance between the first metal layer and the second metal layer is 80 nm.
The outer protective layer is made of metal.
The invention has the beneficial effects that: the double-effect infrared stealth structure provided by the invention is arranged. The vacuum cavity layer can prevent heat from diffusing and spreading, the resonance resonant cavity can prevent heat radiation from spreading, incident infrared light can form resonance in the resonant cavity, absorption of light is enhanced, and the absorbed light can be converted into heat energy more quickly; thus, the equipment is isolated from the infrared from two aspects, so that the equipment can realize the infrared stealth function.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of a double-effect infrared stealth structure.
Fig. 2 is a schematic diagram of a double-effect infrared stealth structure.
In the figure: 1. a base layer; 2. a resonant cavity; 3. a vacuum cavity layer; 4. an outer protective layer; 5. a first metal layer; 6. a second metal layer; 7. and (5) filling the layer.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1
The embodiment provides a dual-effect infrared stealth structure shown in fig. 1, which includes a substrate layer 1, a resonant cavity 2 is disposed in the substrate layer 1, and the resonant cavity 2 can isolate the thermal radiation effect, so that the thermal radiation cannot be transmitted; the infrared stealth structure comprises a resonant cavity 2 and is characterized in that a vacuum cavity layer 3 is arranged above the resonant cavity 2, the heat propagation effect can be isolated through the vacuum cavity layer 3, an outer protection layer 4 is arranged above the vacuum cavity layer 3, the outer protection layer is mainly used for protecting the stealth structure, can be made of metal or other materials, and can be selected according to the actual working environment of the infrared stealth structure, for example, waterproof materials can be selected for underwater work, and high-temperature resistant materials can be selected for high-temperature environment work.
Further, the resonant cavity 2 includes a first metal layer 5, a filling layer 7, and a second metal layer 6, the second metal layer 6 is disposed above the substrate layer 1, the first metal layer 5 is disposed below the vacuum cavity layer 3, the first metal layer 5 is spaced from the second metal layer 6, and the filling layer 7 is filled in a gap between the first metal layer 5 and the second metal layer 6, so that a fabry-perot cavity can be formed, and when infrared light is incident from the lower grid, resonance can be formed in the fabry-perot cavity, thereby generating more heat.
Further, the first metal layer 5 and the second metal layer 6 are made of gold, silver, copper, or the like.
Further, the second metal layer 6 includes a plurality of metal strips arranged periodically, and the spacing between the metal strips is 50 to 60nm, preferably, 50nm, 55nm, 60nm, and the like can be selected.
Further, the distance between the first metal layer 5 and the second metal layer 6 is 80nm, so that the efficiency of infrared light resonance can be improved.
Further, the basal layer 1 is made for polymethyl methacrylate (PMMA), and PMMA's mechanical strength is higher, consequently can be fine play the supporting role, and PMMA luminousness is higher moreover, can reach more than 92%, like this, makes more infrared light get into the resonant cavity like this to take place work, avoid infrared light to leak, thereby form better infrared stealthy effect.
Further, the vacuum chamber layer 3 may be made of alumina under a vacuum environment. Or made of porous materials, and the holes are sealed in a vacuum environment to form a vacuum cavity.
Example 2
The embodiment provides a dual-effect infrared stealth structure shown in fig. 2, which includes a substrate layer 1, a resonant cavity 2 is disposed in the substrate layer 1, and the resonant cavity 2 can isolate the thermal radiation effect, so that the thermal radiation cannot be transmitted; a vacuum cavity layer 3 is arranged above the resonant cavity 2, and the vacuum cavity layer 3 is provided with a plurality of layers of vacuum cavities. The vacuum chamber shown in fig. 2 is provided with 3 layers; the heat propagation effect can be better isolated through the vacuum cavity layer 3, the outer protection layer 4 is arranged above the vacuum cavity layer 3, is mainly used for protecting the stealth structure, can be made of metal or other materials, and can be selected according to the actual working environment of the infrared stealth structure, for example, waterproof materials can be selected for underwater work, and high-temperature resistant materials can be selected for high-temperature environment work.
Further, the resonant cavity 2 includes a first metal layer 5, a filling layer 7, and a second metal layer 6, the second metal layer 6 is disposed above the substrate layer 1, the first metal layer 5 is disposed below the vacuum cavity layer 3, the first metal layer 5 is spaced from the second metal layer 6, and the filling layer 7 is filled in a gap between the first metal layer 5 and the second metal layer 6, so that a fabry-perot cavity can be formed, and when infrared light is incident from the lower grid, resonance can be formed in the fabry-perot cavity, thereby generating more heat.
Further, the second metal layer 6 includes a plurality of metal strips arranged periodically, and the spacing between the metal strips is 50 to 60nm, preferably, 50nm, 55nm, 60nm, and the like can be selected.
Further, the distance between the first metal layer 5 and the second metal layer 6 is 80nm, so that the efficiency of infrared light resonance can be improved.
Further, the basal layer 1 is made for polymethyl methacrylate (PMMA), and PMMA's mechanical strength is higher, consequently can be fine play the supporting role, and PMMA luminousness is higher moreover, can reach more than 92%, like this, makes more infrared light get into the resonant cavity like this to take place work, avoid infrared light to leak, thereby form better infrared stealthy effect.
In conclusion, the double-effect infrared stealth structure is arranged. The vacuum cavity layer 3 can prevent heat from diffusing and spreading, the resonant cavity 2 can prevent heat radiation from spreading, incident infrared light can form resonance in the resonant cavity 2, absorption of light is enhanced, and the absorbed light can be converted into heat more quickly; thus, the equipment is isolated from the infrared from two aspects, so that the equipment can realize the infrared stealth function.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (4)
1. A double-effect infrared stealth structure is characterized in that: the artificial leather comprises a substrate layer (1), wherein the substrate layer (1) is made of polymethyl methacrylate; a resonant cavity (2) is arranged on the substrate layer (1), a vacuum cavity layer (3) is arranged above the resonant cavity (2), and an outer protective layer (4) is arranged above the vacuum cavity layer (3); the outer protective layer (4) is made of metal;
the resonant cavity (2) comprises a first metal layer (5), a filling layer (7) and a second metal layer (6), wherein the second metal layer (6) comprises a plurality of metal strips which are arranged periodically, the second metal layer (6) is arranged above the substrate layer (1), the first metal layer (5) is arranged below the vacuum cavity layer (3), and the distance between the first metal layer (5) and the second metal layer (6) is 80 nm; and a filling layer (7) is filled in a gap between the first metal layer (5) and the second metal layer (6).
2. The dual effect infrared stealth structure of claim 1, further comprising: the distance between the metal strips is 50-60 nm.
3. The dual effect infrared stealth structure of claim 2, further comprising: the spacing of the metal strips is 60 nm.
4. The dual effect infrared stealth structure of claim 1, further comprising: the vacuum cavity layer (3) is provided with a plurality of layers of vacuum cavities.
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| CN201910415174.7A CN110095022B (en) | 2019-05-17 | 2019-05-17 | Double-effect infrared stealth structure |
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| CN201910415174.7A CN110095022B (en) | 2019-05-17 | 2019-05-17 | Double-effect infrared stealth structure |
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| CN110095022B true CN110095022B (en) | 2021-06-25 |
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Families Citing this family (2)
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| CN111103643A (en) * | 2019-12-26 | 2020-05-05 | 中国人民解放军国防科技大学 | Selective-emission infrared stealth material and preparation method thereof |
| CN111457236B (en) * | 2020-03-21 | 2022-05-20 | 复旦大学 | Full-thermal super surface presenting infrared thermal illusion and being invisible under visible light |
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| CN103513316A (en) * | 2013-09-29 | 2014-01-15 | 苏州大学 | Selective absorption filtering structure |
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| CN106767168A (en) * | 2017-01-11 | 2017-05-31 | 中国人民解放军空军工程大学 | A kind of selective radiation infrared stealth structure |
| CN107436192A (en) * | 2017-07-12 | 2017-12-05 | 电子科技大学 | A kind of near infrared absorption body based on graphene/metal nano band structure |
| CN107804041A (en) * | 2017-09-27 | 2018-03-16 | 北京机电工程研究所 | A kind of heat-insulated stealthy high temperature resistant air intake duct and preparation method thereof |
| CN108957604A (en) * | 2018-09-27 | 2018-12-07 | 中国计量大学 | A kind of multilayered structure absorbed with selection |
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2019
- 2019-05-17 CN CN201910415174.7A patent/CN110095022B/en active Active
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|---|---|---|---|---|
| CN2685583Y (en) * | 2004-02-11 | 2005-03-16 | 赵啸宇 | Infrared hidden engine exhaust pipe |
| CN102856663B (en) * | 2012-08-24 | 2014-07-23 | 电子科技大学 | Metamaterial, broadband and infrared wave-absorbing structural material |
| CN103293581A (en) * | 2013-06-28 | 2013-09-11 | 南京理工大学 | Laser and intermediate and far infrared compatible invisible membrane structure |
| CN103513316A (en) * | 2013-09-29 | 2014-01-15 | 苏州大学 | Selective absorption filtering structure |
| CN105137518A (en) * | 2015-08-25 | 2015-12-09 | 浙江大学 | Color optical filter insensitive to incident angle and preparation method for the same |
| CN106767168A (en) * | 2017-01-11 | 2017-05-31 | 中国人民解放军空军工程大学 | A kind of selective radiation infrared stealth structure |
| CN107436192A (en) * | 2017-07-12 | 2017-12-05 | 电子科技大学 | A kind of near infrared absorption body based on graphene/metal nano band structure |
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| CN108957604A (en) * | 2018-09-27 | 2018-12-07 | 中国计量大学 | A kind of multilayered structure absorbed with selection |
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