CN113428385A - Star watch multilayer heat insulation assembly with strong electromagnetic environment protection capability - Google Patents
Star watch multilayer heat insulation assembly with strong electromagnetic environment protection capability Download PDFInfo
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- CN113428385A CN113428385A CN202110881059.6A CN202110881059A CN113428385A CN 113428385 A CN113428385 A CN 113428385A CN 202110881059 A CN202110881059 A CN 202110881059A CN 113428385 A CN113428385 A CN 113428385A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/10—Artificial satellites; Systems of such satellites; Interplanetary vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/10—Artificial satellites; Systems of such satellites; Interplanetary vehicles
- B64G1/1014—Navigation satellites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/52—Protection, safety or emergency devices; Survival aids
- B64G1/58—Thermal protection, e.g. heat shields
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- Aviation & Aerospace Engineering (AREA)
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- Radar, Positioning & Navigation (AREA)
- Thermal Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The application discloses a star table multilayer heat insulation assembly with strong electromagnetic environment protection capability. The method comprises the following steps: the laminated assembly is coated with the anti-electromagnetic reinforcing facial mask assembly; the anti-electromagnetic reinforcing mask group is connected with the laminated assembly through suture lines in a sewing mode; this application is through strengthening the facial mask group at the anti electromagnetism of range upon range of subassembly surface cladding, utilize the stylolite to sew up the two, the facial mask group is strengthened to anti electromagnetism has polyimide layer and metal level, and the metal level is close to range upon range of subassembly setting relatively, with range upon range of subassembly orientation protected product when using, polyimide layer towards external environment, because polyimide layer has good thermal control temperature characteristic and total dose effect, the metal level has anti electromagnetic radiation and anti self-destruction's effect, can prevent effectively that this thermal-insulated subassembly self from being burnt, and avoid being protected the product and receive strong electromagnetic wave interference.
Description
Technical Field
The disclosure generally relates to the technical field of strong electromagnetic environment protection of satellites, and particularly relates to a star surface multilayer heat insulation assembly with strong electromagnetic environment protection capability.
Background
As the role of satellites in the present society becomes more and more important, both communication, navigation and remote sensing satellites have higher and higher requirements on the quality and real-time performance of communication. Particularly, the navigation satellite has more outstanding requirements on real-time communication, interference resistance, accurate positioning and the like, and the strong electromagnetic environment can seriously affect the positioning accuracy and the communication of the satellite, so that the requirement of the satellite on strong electromagnetic protection is higher and higher.
The spatial strong electromagnetic environment mainly comprises a natural strong electromagnetic environment and an artificial strong electromagnetic environment. Wherein the natural strong electromagnetic environment primarily refers to solar radio frequency emissions, which are increasingly intense with intense bursts of solar flare and associated solar activity. The man-made strong electromagnetic environment mainly refers to high-power microwave weapons, high-power microwaves which are generated by electromagnetic pulse bombs and the like and can damage the spacecraft.
The strong electromagnetic wave influences the satellite mainly through front door coupling and back door coupling. The strong electromagnetic wave is coupled into the satellite through a front door or a back door, the energy of the strong electromagnetic wave forms an instant electric field in the system or is converted into large current and large voltage which change along with time and space, and the coupled energy is conducted through a medium such as a cable and a waveguide or transmitted through electromagnetic space radiation and reaches fragile parts such as a sensitive single machine, an integrated circuit and electronic components in the system. When the power or energy reaches a certain level, it may interfere with the normal operation of the device and even burn out the electronic equipment or devices.
At present, when the back door coupling microwave is protected, a mode of adding a shielding layer is generally adopted, the satellite is coated with a set of thermal control protection multilayer on the satellite surface, the protection layer is a first defense line affected by strong electromagnetic waves, and the set of thermal control protection multilayer has the defect that the thermal control protection multilayer is damaged by the strong electromagnetic waves. Therefore, the star watch multilayer heat insulation assembly with the strong electromagnetic environment protection capability is provided for solving the problem that the protective layer is easily damaged and burnt by strong electromagnetic waves to influence the normal operation of electronic equipment or devices in a system.
Disclosure of Invention
In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a star-watch multi-layer heat-insulating assembly with strong electromagnetic wave interference prevention, self-damage prevention, burnout prevention, low cost, simple structure and easy implementation, and having strong electromagnetic environment protection capability.
In a first aspect, the present application provides a star surface multi-layer thermal insulation assembly with strong electromagnetic environment protection capability, comprising:
the stack of the components is stacked,
the anti-electromagnetic reinforcing mask group is coated on the surface of the laminated assembly; the anti-electromagnetic reinforcing mask group is connected with the laminated assembly through suture lines in a sewing mode;
the anti-electromagnetic reinforcing film assembly is provided with a polyimide layer and a metal layer, and the metal layer is relatively close to the laminated assembly;
in use, the laminated assembly faces the protected product and the polyimide layer faces the external environment.
According to the technical scheme provided by the embodiment of the application, a plurality of uniformly distributed round holes are formed in the anti-electromagnetic reinforcement panel set.
According to the technical scheme that this application embodiment provided, the diameter of round hole is 0.2mm, and adjacent two interval between the round hole is 1.6 mm.
According to the technical scheme provided by the embodiment of the application, the surface of the polyimide layer, which is far away from the metal layer, is provided with the indium tin oxide film.
According to the technical scheme provided by the embodiment of the application, the metal layer is an aluminum layer or a silver layer with the thickness of 6-10 microns.
According to the technical scheme provided by the embodiment of the application, the suture line is a polyester cotton line or a flame-retardant line.
According to the technical scheme provided by the embodiment of the application, the anti-electromagnetic reinforcing facial mask group is a hole gap wrapping facial mask group;
the hole and gap wrapping mask group is provided with an outer carburized polyimide layer, an intermediate metal layer and an inner carburized polyimide layer which are sequentially arranged; the inner carburized polyimide layer is relatively close to a protected product;
the thickness of the outer carburized polyimide layer and the inner carburized polyimide layer is 5-10 micrometers; the intermediate metal layer is a nickel layer with the thickness of 0.24 microns.
According to the technical scheme provided by the embodiment of the application, the laminated assembly is provided with a plurality of laminated reflection layers, and a spacing layer is arranged between every two adjacent reflection layers.
According to the technical scheme provided by the embodiment of the application, the reflecting layer is a polyester film with double-sided aluminizing thickness of 6-10 microns.
According to the technical scheme provided by the embodiment of the application, the spacing layer is a polyester net.
In conclusion, the technical scheme specifically discloses a specific structure of a star surface multilayer heat insulation assembly with strong electromagnetic environment protection capability. This application is specifically through strengthening the facial mask group at the anti electromagnetism of range upon range of subassembly surface cladding, utilize the stylolite to sew up the two, the facial mask group is strengthened to the anti electromagnetism has polyimide layer and metal level, and the metal level is close to range upon range of subassembly setting relatively, with range upon range of subassembly orientation protected product when using, polyimide layer is towards external environment, because polyimide layer has good thermal control temperature characteristic and total dose effect, the metal level has anti electromagnetic radiation and anti self effect of damaging, can prevent effectively that this thermal-insulated subassembly self from being burnt, and avoid being protected the product and receive strong electromagnetic wave interference.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of the anti-electromagnetic reinforcement panel assembly.
FIG. 2 is a schematic structural diagram of a star-surface multi-layer thermal insulation assembly with strong electromagnetic environment protection capability.
Fig. 3 is a schematic structural view of a circular hole.
FIG. 4 is a schematic structural view of a mask set wrapped in a hole and a slit.
FIG. 5 is a schematic structural view of a hole gap-wrapping mask set applied to hole plugging.
Reference numbers in the figures: 1. a reflective layer; 2. a spacer layer; 3. an anti-electromagnetic reinforcing mask group; 4. a suture; 5. a circular hole; 6. the hole and the gap are wrapped with a mask group; 7. a ground terminal; 8. a cabin penetrating cable; 9. a star deck; 10. an organ sheet;
301. an indium tin oxide film; 302. a polyimide layer; 303. a metal layer;
601. an outer carburized polyimide layer; 602. an intermediate metal layer; 603. the inner layer is a carburized polyimide layer.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
Please refer to fig. 1, which is a schematic structural diagram of a first embodiment of a star-watch multi-layer thermal insulation assembly with strong electromagnetic environment protection capability according to the present application, including:
the stack of the components is stacked,
the anti-electromagnetic reinforcing mask group 3 is coated on the surface of the laminated assembly; the anti-electromagnetic reinforcing mask group 3 and the laminated assembly are connected through sewing threads 4;
the electromagnetic reinforcing resisting panel group 3 is provided with a polyimide layer 302 and a metal layer 303, and the metal layer 303 is relatively close to the laminated assembly;
in use, the laminated assembly faces the product to be protected and the polyimide layer 302 faces the external environment.
In the present embodiment, as shown in fig. 2, a laminated assembly having reflective layers 1, the number of the reflective layers 1 being at least five and being arranged in a laminated manner, for increasing the infrared radiation resistance; here, the type of the reflective layer 1 is, for example, a double-sided aluminized polyester film having a thickness of 6 to 10 μm;
the spacing layer 2 is arranged between two adjacent reflecting layers 1 and plays a role in isolating heat conduction between the reflecting layers 1; here, the type of spacer layer 2 is, for example, a polyester net;
the anti-electromagnetic reinforcing facial mask group 3 is coated on the surface of the laminated assembly and has the function of protecting the strong electromagnetic environment; specifically, as shown in fig. 1, the anti-electromagnetic-hardening panel group 3 has a polyimide layer 302 and a metal layer 303, and the metal layer 303 is disposed close to the laminated assembly relative to the polyimide layer, and the polyimide layer 302 has good thermal control temperature characteristics and total dose effect; the ITO film 301 is arranged on the surface of the polyimide layer 302 far away from the metal layer 303, has atomic oxygen environment resistance, prevents electrostatic discharge caused by electrostatic charge accumulation, protects the metal layer 303 and reduces the metal secondary electron multiplication effect; here, the thickness of the polyimide layer 302 is, for example, 25 μm;
the metal layer 303 has the functions of resisting electromagnetic radiation and self-damage; here, the type of the metal layer 303 is, for example, an aluminum layer or a silver layer with a thickness of 6 to 10 micrometers, and a magnetic conductive material such as nickel may be added as appropriate according to actual requirements;
specifically, the thickness of the metal layer 303 should be at least 1 skin depth of the microwave (1 skin depth metal can reduce the transmitted microwave intensity to 1/e of the original intensity-36.8%, and the power to 1/e 2-13.5%), and the thickness of the aluminum plating layer is recommended to be 2 skin depths in consideration of safety margin, wherein the skin depth (in m) is calculated by the following formula:
wherein, omega is the angular frequency (rad/s) of the microwave field vibration; mu.s0The permeability of a metal conductor in vacuum is 4 pi x 10-7Hm-1(ii) a σ is the conductivity of the metal (in Ω)-1m-1). When the angular frequency is fixed, the greater the electrical conductivity of the metal, the corresponding smaller the skin depth, e.g., aluminum has an electrical conductivity of about 3.54 × 107 Ω at room temperature-1m-1. The strong electromagnetic wave generally refers to electromagnetic wave with frequency of 1GHz-300GHz, the lower limit of the frequency is selected as a representative working condition without loss of generality, and the corresponding skin depth is about 2.675 multiplied by 10 according to the calculation that the radio frequency pulse frequency is 1GHz-6And m is selected. The thickness of the intermediate aluminum layer should be greater than 2.675 x 10 at this time-6m×2＝5.4×10-6m, the metal layer 303 is here suggested to be 6 μm thick.
Further, the connection manner of the anti-electromagnetic-reinforcement panel group 3 and the laminated assembly, optionally, for example, a sewing connection, specifically, the anti-electromagnetic-reinforcement panel group 3 and the laminated assembly are sewn by using a sewing thread 4, and the sewn metal layer 303 is closely attached to the laminated assembly, when in use, the laminated assembly faces to a protected product, and the polyimide layer 302 faces to the external environment; here, the type of the sewing thread 4 is, for example, a polyester cotton thread or a flame retardant thread.
Further, as shown in fig. 3, a circular hole 5 is formed in the anti-electromagnetic-force reinforcing mask assembly 3 for releasing pressure; moreover, the specification of the round hole needs to meet the requirements of electromagnetic shielding and pressure relief at the same time;
specifically, the strong electromagnetic wave generally refers to an electromagnetic wave with a frequency of 1GHz-300GHz, and the shortest wavelength (corresponding to a frequency of 300 GHz) is generally selected, and the wavelength is about 1mm as the upper limit of the shielding, so that the diameter of the small hole is required to be smaller than 1/4 of the wavelength, that is, the diameter of the opened small hole can meet the shielding requirement as long as the diameter is less than 1/4 mm. The diameter of the openings should therefore be less than 0.25mm, and an opening diameter of 0.2mm may be chosen. Meanwhile, the quick pressure relief characteristic is considered, the area of the small hole in unit area is more than or equal to 0.5-1% of the opening rate specified by the industry standard, and 1% is calculated here.
The circle hole pitch was calculated as an area of 1cm2 using the following formula:
wherein A is 1cm per unit area2R is the radius of round hole, and the number N of round holes that can calculate unit area by the above formula is 32, takes into account the pressure release margin and can calculate the interval between the round hole and should not be more than 1.77mm from this.
Here, the diameter of the circular hole 5 is, for example, 0.2mm, and the distance between two adjacent circular holes 5 is, for example, 1.6 mm; the number of which is at least 32 per unit area.
And when the star surface multi-layer heat insulation assembly is installed, the multi-layer fixing pin is installed in a hollow mode with two ends sealed by metal, so that the situation that holes are communicated is avoided.
Example two
As shown in fig. 4, when some cabin-penetrating cables need to penetrate through the cabin, holes and gaps exist on the star body, and high-power microwaves are easily coupled into the star body through the holes, which causes interference and even burning of sensitive devices inside the star body, so that the holes need to be blocked.
In order to prevent the problem of wave leakage in the hole gaps caused by cabin-penetrating cables, waveguides, pipelines and the like, the anti-electromagnetic reinforcing facial mask group 3 is designed into a structure that the hole gaps wrap the facial mask group 6;
specifically, the hole gap wrapping film group 6 is used for absorbing leakage waves caused by cable leads, so that the power is greatly reduced when high-power microwaves reach the cabin-passing holes;
the hole gap wrapping mask group 6 is provided with an outer carburized polyimide layer 601, a middle metal layer 602 and an inner carburized polyimide layer 603 which are sequentially arranged, and the inner carburized polyimide layer 603 is relatively close to a protected product; the outer carburized polyimide layer 601 and the inner carburized polyimide layer 603 are used for ensuring that heat deposited by microwaves can be radiated to the outside, and also play a role in electrostatic conduction, so that the grounding terminal 7 is conveniently connected; the middle metal layer 602 is used to enhance the absorption characteristic of leakage wave, and the material of the middle metal layer 602 is, for example, a relatively high resistivity and magnetic conductive material; the thickness of the skin-care product can be selected within 1 skin depth;
here, the thickness of the outer carburized polyimide layer 601 and the inner carburized polyimide layer 603 is, for example, 5 to 10 micrometers; the type of intermediate metal layer 602, for example, a 0.24 micron thick nickel layer; selecting the worst representative working condition for the nickel material, and calculating according to the radio frequency pulse frequency of 300GHz, wherein the corresponding skin depth is about 2.4 multiplied by 10-7m, i.e. 0.24 microns;
specifically, the hole gap is blocked, as shown in fig. 5, the cabin penetrating cables 8 are adhered to the wall and routed after penetrating through the star body cabin plate 9, the star surface multilayer heat insulation assembly described in the first embodiment is covered on the upper portion, and the hole gap is required to wrap the mask group 6 at the cabin penetrating part of the cabin penetrating cables 8. And the distance from the cabin-through hole to the boundary of the hole gap-wrapping mask group 6 is at least 2 wavelengths, wherein the distance is 20cm, for example, and the hole gap-wrapping mask group 6 is required to be arranged below the star surface multi-layer heat insulation assembly and cannot be independently exposed outside the star body. And the connection of the organ sheet 10 connected with the star-surface multi-layer heat insulation assembly is ensured to be connected with a grounding wire which is communicated with the grounding wire of the hole gap wrapping face membrane group 6 and is uniformly grounded.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A star surface multi-layer heat insulation assembly with strong electromagnetic environment protection capability is characterized by comprising:
the stack of the components is stacked,
the anti-electromagnetic reinforcing mask group is coated on the surface of the laminated assembly; the anti-electromagnetic reinforcing mask group is connected with the laminated assembly through suture lines in a sewing mode;
the anti-electromagnetic reinforcing film assembly is provided with a polyimide layer and a metal layer, and the metal layer is relatively close to the laminated assembly;
in use, the laminated assembly faces the protected product and the polyimide layer faces the external environment.
2. The star surface multi-layer heat insulation assembly with strong electromagnetic environment protection capability as claimed in claim 1, wherein the electromagnetic resistant reinforcing face film group is provided with a plurality of uniformly distributed round holes.
3. The star catalogue multi-layer thermal insulation assembly with strong electromagnetic environment protection capability according to claim 2, wherein the diameter of the circular hole is 0.2mm, and the distance between two adjacent circular holes is 1.6 mm.
4. The star-watch multilayer thermal insulation assembly with strong electromagnetic environment protection capability as claimed in claim 1, wherein the surface of the polyimide layer far away from the metal layer is provided with an indium tin oxide film.
5. The star-watch multilayer thermal insulation assembly with strong electromagnetic environment protection capability according to claim 1, wherein the metal layer is an aluminum layer or a silver layer with a thickness of 6 microns to 10 microns.
6. The star-surface multi-layer thermal insulation assembly with strong electromagnetic environment protection capability of claim 1, wherein the sewing thread is polyester cotton thread or flame retardant thread.
7. The star surface multi-layer heat insulation assembly with strong electromagnetic environment protection capability of claim 1, wherein the electromagnetic-resistant reinforcing facial mask group is a hole and gap wrapping facial mask group;
the hole and gap wrapping mask group is provided with an outer carburized polyimide layer, an intermediate metal layer and an inner carburized polyimide layer which are sequentially arranged; the inner carburized polyimide layer is relatively close to a protected product;
the thickness of the outer carburized polyimide layer and the inner carburized polyimide layer is 5-10 micrometers; the intermediate metal layer is a nickel layer with the thickness of 0.24 microns.
8. The star catalogue multi-layer thermal insulation assembly with strong electromagnetic environment protection capability according to claim 1, wherein the laminated assembly is provided with a plurality of reflection layers which are arranged in a laminated mode, and a spacing layer is arranged between every two adjacent reflection layers.
9. The star catalogue multi-layer thermal insulation assembly with strong electromagnetic environment protection capability according to claim 8, wherein the reflecting layer is a double-sided aluminized polyester film with a thickness of 6 microns to 10 microns.
10. The star catalogue multi-layer thermal insulation assembly with strong electromagnetic environment protection capability according to claim 8, wherein said spacing layer is a polyester net.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110881059.6A CN113428385B (en) | 2021-08-02 | 2021-08-02 | Star watch multilayer heat insulation assembly with strong electromagnetic environment protection capability |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110881059.6A CN113428385B (en) | 2021-08-02 | 2021-08-02 | Star watch multilayer heat insulation assembly with strong electromagnetic environment protection capability |
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| CN113428385A true CN113428385A (en) | 2021-09-24 |
| CN113428385B CN113428385B (en) | 2022-11-22 |
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Citations (6)
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| EP1276364A1 (en) * | 2001-07-12 | 2003-01-15 | Usinor | Multilayered sheet used for electromagnetic shielding as well as thermal and acoustic insulation |
| US20100118407A1 (en) * | 2008-11-10 | 2010-05-13 | Corporation For National Research Initiatives | Method of reflecting impinging electromagnetic radiation and limiting heating caused by absorbed electromagnetic radiation using engineered surfaces on macro-scale objects |
| CN108513521A (en) * | 2017-02-24 | 2018-09-07 | 昆山雅森电子材料科技有限公司 | Have the high shielding EMI screened films and preparation method thereof of black polyamide thin film |
| CN111063977A (en) * | 2019-11-13 | 2020-04-24 | 西安空间无线电技术研究所 | Wave-transparent multilayer heat insulation structure for realizing thermal control of spacecraft antenna |
| CN210579900U (en) * | 2019-09-10 | 2020-05-19 | 深圳市中欧新材料有限公司 | Novel electromagnetic shielding film |
| CN212147798U (en) * | 2020-03-16 | 2020-12-15 | 浙江富晟科技股份有限公司 | PET aluminized high-elongation film |
-
2021
- 2021-08-02 CN CN202110881059.6A patent/CN113428385B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1276364A1 (en) * | 2001-07-12 | 2003-01-15 | Usinor | Multilayered sheet used for electromagnetic shielding as well as thermal and acoustic insulation |
| US20100118407A1 (en) * | 2008-11-10 | 2010-05-13 | Corporation For National Research Initiatives | Method of reflecting impinging electromagnetic radiation and limiting heating caused by absorbed electromagnetic radiation using engineered surfaces on macro-scale objects |
| CN108513521A (en) * | 2017-02-24 | 2018-09-07 | 昆山雅森电子材料科技有限公司 | Have the high shielding EMI screened films and preparation method thereof of black polyamide thin film |
| CN210579900U (en) * | 2019-09-10 | 2020-05-19 | 深圳市中欧新材料有限公司 | Novel electromagnetic shielding film |
| CN111063977A (en) * | 2019-11-13 | 2020-04-24 | 西安空间无线电技术研究所 | Wave-transparent multilayer heat insulation structure for realizing thermal control of spacecraft antenna |
| CN212147798U (en) * | 2020-03-16 | 2020-12-15 | 浙江富晟科技股份有限公司 | PET aluminized high-elongation film |
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