CN115568195A - Shielding structure and method for cabin with high shielding requirement for penetration of unshielded cable - Google Patents
Shielding structure and method for cabin with high shielding requirement for penetration of unshielded cable Download PDFInfo
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- CN115568195A CN115568195A CN202211058856.5A CN202211058856A CN115568195A CN 115568195 A CN115568195 A CN 115568195A CN 202211058856 A CN202211058856 A CN 202211058856A CN 115568195 A CN115568195 A CN 115568195A
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- cabin
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- aluminizer
- shielding
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/526—Electromagnetic shields
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0015—Gaskets or seals
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Insulated Conductors (AREA)
Abstract
A shielding structure and a method for a non-shielded cable to penetrate a cabin with high shielding requirements are disclosed, wherein the shielding structure comprises a metal boss connected to the inner side of the cabin, a cabin penetrating cable penetrates through the metal boss and a cable cabin penetrating hole of the cabin, and a plug connector of the cabin penetrating cable is plugged with equipment in the cabin; the aluminizer wraps the cabin penetrating cable, wraps the plug connector until being lapped with the equipment shell, and wraps the outer wall of the metal boss until being lapped with the cabin body; the shielding method comprises the following steps: wrapping the cabin-penetrating cable by using an aluminum-plated film, wherein the starting point and the end point of the wrapping are the positions of the plug-in base and the cabin-penetrating cable, and the aluminum-plated film is reserved at both ends; after the connector is inserted into the equipment, the reserved aluminizer completely wraps the connector and is in good lap joint with the equipment shell; and installing a metal boss at the cable cabin penetrating hole, penetrating the cabin penetrating cable out of the cabin body through the metal boss, completely wrapping the reserved aluminizer on the outer wall of the metal boss and well lapping the reserved aluminizer with the cabin plate. The cost is low, the operation is simple and convenient, the realization is easy, and the damage of the cabin-penetrating cable to the shielding effectiveness of the cabin body can be effectively controlled.
Description
Technical Field
The invention relates to a shielding structure and a shielding method for a non-shielded cable penetrating a cabin with high shielding requirements, and belongs to the technical field of cabin/box shielding.
Background
In order to ensure that the receiver is not influenced by interference of radiation of the spacecraft, the spacecraft body requires a very high shielding efficiency design, namely, interference signals radiated and emitted by equipment and cables in the spacecraft body are ensured not to be conducted to a high-sensitivity receiving antenna for interference outside the spacecraft.
For the design of the spacecraft body with high shielding effectiveness, the most difficult to deal with is the cables penetrating through the body, and the shielding measures are applied to the unshielded cables most difficultly, so that the shielding effectiveness of the body is seriously damaged. Therefore, it is necessary to design an effective and easy-to-implement shielding method for the unshielded cable penetrating the cabin with high shielding requirement to meet the requirements of model applications.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the shielding structure and the shielding method for the cabin with the high shielding requirement of the non-shielded cable are provided, so that the damage of the non-shielded cable to the shielding effect of the cabin is reduced on the premise of ensuring the normal signal transmission of the non-shielded cable, and the shielding capability of the cabin is effectively improved.
The technical solution of the invention is as follows:
a shielding structure of a cabin body with high shielding requirement for penetrating through non-shielded cables comprises:
the metal boss is connected to the inner side of the cabin body, the cabin penetrating cable penetrates through the metal boss and penetrates through the cabin body through the cable cabin penetrating hole, and the plug connector of the cabin penetrating cable is plugged with equipment in the cabin body;
aluminizing films wrap the cabin penetrating cables, and the two ends of the cabin penetrating cables are wrapped by the plug connectors of the cabin penetrating cables respectively until the plug connectors are in good lap joint with the equipment shell, and the outer walls of the metal bosses are wrapped until the plug connectors are in good lap joint with the cabin body.
The metal boss is in a circular tube shape, a base is arranged at one end of the outer wall of the metal boss, and the base is connected to the cabin body through screws.
The height of the boss protruding into the cabin is 40-60mm, and the inner diameter of the metal boss is consistent with the diameter of the cable cabin penetrating hole.
The aluminizer is a double-sided or single-sided porous film, the thickness of the aluminizer is 18-25 mu m, and the length reserved at two ends after the cable is wrapped is 200-500mm; the aluminizer is an aluminized polyimide film.
The resistance of any two points of the aluminizer is less than 10m omega from the part wrapped by the cabin-penetrating cable to the part lapped with the equipment shell;
and in the part of the aluminizer which is wrapped from the cabin-penetrating cable to the outer wall of the metal boss and is lapped with the cabin plate, the resistance of any two points is less than 10m omega.
The resistance between the base of the metal boss and the cabin body is less than 10m omega.
And the resistance of any two points at the part of the aluminum-plated film wrapping the cabin-penetrating cable is less than 15m omega.
The folds or the bending gaps of the aluminizer are fixed by using an adhesive tape, and the adhesive tape is a conductive adhesive tape.
The method for wrapping the cable by the aluminum-plated film comprises the following steps: cutting each width of the aluminizer by about 30-50mm, and overlapping the front and back circles of the aluminizer by about 40-60% during winding; the cabin penetrating cables are bundled and wrapped by two layers of aluminizers, and the clockwise direction and the anticlockwise direction of the two layers are opposite; after one aluminizer is wound, the next aluminizer starts to wrap 100-200mm backwards from the last finished position, and the position contacted by the aluminizer is fixed by using an adhesive tape.
A shielding method for a cabin with high shielding requirement by penetrating an unshielded cable comprises the following steps:
(1) Wrapping a cable needing to pass through a cabin by using an aluminum-plated polyimide film, wherein the starting point and the end point of the wrapping are respectively the bottom of a base of a cable connector and the position of the cable passing through the cabin, and aluminum-plated films with certain lengths are reserved at two ends of the wrapping;
(2) After the cable connector is inserted into the equipment, the reserved aluminum-plated film is wrapped to the connector until the aluminum-plated film completely wraps the connector and is in good lap joint with the equipment shell;
(3) A metal boss is arranged at the cable cabin-through hole, the boss is a cylindrical pipeline which is fixed on a cabin plate by a base through a screw and protrudes into the cabin; and (4) taking the cabin penetrating cable out of the cabin through the boss cylindrical pipeline, and wrapping the reserved aluminizer to the outer wall of the boss pipeline until the outer wall of the pipeline is completely wrapped and well lapped with the cabin plate.
Selecting a double-sided or single-sided porous film as the aluminized polyimide film in the step (1), wherein the thickness is 18 mu m, and reserving 200mm at two ends after wrapping a cable; the method for wrapping the cable by the aluminum-plated film comprises the following steps: cutting each width of the aluminizer to be about 40mm, and overlapping the front circle and the rear circle of the aluminizer by about 50% during winding; wrapping the cable into a bundle by using an aluminizer for two layers, wherein the clockwise and anticlockwise directions of the two layers are opposite; after one aluminizer is wound, the next aluminizer starts to wrap from the last finished position to the back by 100-200 mm; when the cable is coated, the aluminum-plated film is ensured to be wound on the cable tightly enough, no gap is formed at the overlapped part, and the gap at the bent part is bound and fixed by the aluminum-plated adhesive tape to prevent the gap from appearing; a brand-new wrinkle-free aluminized film is used for wrapping the cable, so that the aluminized film can be wrapped at one time, creases are reduced, the electrical continuity of the aluminized film is ensured, and the resistance of any two points of the aluminized film is smaller than 15m omega.
The aluminizer completely wraps the connector and is well lapped with the equipment shell, and an aluminized adhesive tape is required to be used for tightly binding wrinkles generated at the transition position from the cable to the connector without exposing gaps; the aluminizer, the connector and the equipment shell should form an electric continuum, and the lap resistance of the aluminizer and the equipment shell should be less than 10m omega.
Fastening the boss base on the deck plate by at least four screws, wherein the resistance of the boss base and the deck plate is less than 10m omega; the height of the boss protruding into the cabin is 40-60mm, and the inner diameter of the cylindrical pipeline is consistent with the diameter of the cable cabin penetrating hole. The aluminizer wraps the outer wall of the boss cylindrical pipeline and is well lapped with the cabin plate, and the resistance of any two pipes is smaller than 10m omega.
In summary, the present application at least includes the following beneficial technical effects:
(1) The method greatly reduces the damage of the unshielded cable penetrating the cabin body to the shielding effectiveness of the cabin body, optimizes the shielding effectiveness of the cabin body, and further reduces the leakage of radiation signals in the space vehicle cabin to the outside of the cabin body to interfere with the high-sensitivity receiving antenna;
(2) The method can also reduce the transmission of the interference signals outside the cabin to the space ship cabin for radiation through the cabin-penetrating unshielded cable, thereby improving the capability of other equipment in the cabin for resisting the external electromagnetic environment.
Drawings
FIG. 1 is a schematic view of the masking process of the present invention;
FIG. 2 is a schematic flow chart of the present invention.
Description of reference numerals: 1. a cabin body; 2. a cable penetration hole; 3. a cabin penetrating cable; 4. a metal boss; 5. and (5) aluminizing.
Detailed Description
The present application will now be described in further detail with reference to the following figures and specific examples:
the embodiment of the application discloses a shielding structure and a method for a non-shielded cable to penetrate through a cabin body with high shielding requirement, and with reference to fig. 1, the shielding structure comprises a metal boss 4 and an aluminizer 5, the metal boss 4 is connected to the inner side of the cabin body 1 (not shown in the figure), a cabin penetrating cable 3 penetrates through the metal boss 4 and penetrates through the cabin body 1 through a cable cabin penetrating hole 2, and a connector clip of the cabin penetrating cable 3 is spliced with equipment in the cabin body 1; the aluminizer 5 wraps the cabin-penetrating cable 3, and the two ends of the cabin-penetrating cable 3 are wrapped by the plug connectors of the cabin-penetrating cable 3 respectively until the plug connectors are in good lap joint with the equipment shell, and the outer wall of the metal boss 4 is wrapped until the plug connectors are in good lap joint with the cabin plate of the cabin body 1.
The metal boss 4 is in a circular tube shape, one end of the outer wall of the metal boss 4 is provided with a base, and the base is connected to the cabin body 1 through a screw. The height of the boss protruding into the cabin is 40-60mm, and the inner diameter of the metal boss 4 is consistent with the diameter of the cable cabin penetrating hole 2. The metal boss 4 is made of aluminum alloy generally, the wall thickness is about 3mm, and the base of the metal boss 4 can completely block the cabin penetrating plate.
The aluminum-plated film 5 is an aluminum-plated polyimide film. The aluminized polyimide film is a double-sided or single-sided porous film, the thickness of the aluminized polyimide film is 18 micrometers, and the length reserved at two ends after the aluminized polyimide film is wrapped on a cable is 200mm.
As shown in fig. 2, the shielding method includes:
the first step is as follows: the through-cabin cable 3 needing to pass through the cabin body 1 is wrapped by the aluminizer 5 with holes on two sides or one side, the thickness of the aluminizer 5 is 18 microns, the starting point and the finishing point of the wrapping are respectively the bottom of the socket connector base of the through-cabin cable 3 and the position of the cable passing through the cabin, 200-500mm aluminizers 5 are reserved at two ends, and 200mm aluminizers 5 are reserved at two ends in the embodiment. When wrapping, the aluminizer 5 is cut to reduce the width of each strip by about 40mm, and the front and the back circles of the aluminizer 5 are overlapped by about 50% when winding; the cabin penetrating cable 3 is bundled to be wrapped by two layers of aluminizers 5, the clockwise and anticlockwise directions of the two layers are opposite, if the first layer is wound clockwise, the second layer is wound anticlockwise; after one aluminizer 5 is wound, the next aluminizer 5 starts to wrap from the last finished position to the rear position by 100-200mm, and the position contacted by the aluminizer 5 is fixed by an aluminized adhesive tape; when the cabin penetrating cable 3 is wrapped, the aluminizer 5 is ensured to be wound on the cabin penetrating cable 3 tightly enough, no gap is formed at the overlapped part, and the gap at the bent part is bound and fixed by the aluminized adhesive tape to prevent the gap from appearing; the brand new wrinkle-free aluminizer 5 is used for wrapping the cable, so that the aluminizer 5 is ensured to complete wrapping at one time, creases are reduced, and the resistance of any two points of the aluminizer 5 is ensured to be smaller than 15m omega.
The second step is that: after the connector of the cabin-penetrating cable 3 is inserted into the equipment, the reserved aluminizer 5 is wrapped to the connector until the aluminizer 5 completely wraps the connector, and the aluminum-plated adhesive tape is used for tightly binding wrinkles generated at the transition position from the cabin-penetrating cable 3 to the connector without exposing gaps; the aluminizer 5, the connector and the equipment shell should form an electric continuum, and the lap resistance of the aluminizer 5 and the equipment shell should be less than 10m omega.
The third step: a metal boss 4 is arranged at the position of the cable cabin penetrating hole 2, a base of the metal boss 4 is fixed on the cabin plate by at least 4 screws, and the resistance between the base of the metal boss 4 and the cabin plate is less than 10m omega; the height of the protrusion of the metal boss 4 into the cabin is 50mm, the metal boss 4 is a cylindrical pipeline, and the inner diameter of the cylindrical pipeline is consistent with the diameter of the cable cabin penetrating hole 2; and (3) passing the cabin penetrating cable 3 through the boss to be taken out of the cabin, wrapping the reserved aluminum-plated film 5 on the outer wall of the metal boss 4 until the outer wall of the metal boss 4 is completely wrapped and well lapped with the cabin plate, wherein the resistance of any two points of the aluminum-plated film 5, the metal boss 4 and the cabin plate of the cabin body 1 is less than 10m omega.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a non-shielded cable pierces through shielding structure of high shielding requirement cabin body which characterized in that: comprises that
The cabin penetrating cable (3) penetrates through the metal boss (4) and penetrates through the cabin body (1) through the cable cabin penetrating hole (2), and a plug connector of the cabin penetrating cable (3) is plugged with equipment in the cabin body (1);
aluminizer (5), parcel cross cabin cable (3), the plug connector of one end parcel cross cabin cable (3) is until and equipment shell good overlap joint, other end parcel metal boss (4) outer wall until and cabin body (1) good overlap joint.
2. The shielding structure of the cabin with high shielding requirement for penetrating the unshielded cable according to claim 1, wherein: the metal boss (4) is in a circular tube shape, a base is arranged at one end of the outer wall of the metal boss (4), and the base is connected to the cabin body (1) through screws.
3. The shielding structure of the cabin with high shielding requirement for penetrating the unshielded cable according to claim 1, wherein: the height of the boss protruding into the cabin is 40-60mm, and the inner diameter of the metal boss (4) is consistent with the diameter of the cable cabin penetrating hole (2).
4. The shielding structure of the unshielded cable penetration high shielding requirement cabin according to claim 1, characterized in that: the aluminizer (5) is a double-sided or single-sided perforated film, the thickness is 18-25 mu m, and the length reserved at two ends after the cable is wrapped is 200-500mm;
the aluminized film (5) is an aluminized polyimide film.
5. The shielding structure of the cabin with high shielding requirement for penetrating the unshielded cable according to claim 1, wherein: the aluminizer (5) is wrapped from the cabin-penetrating cable (3) to a part lapped with the equipment shell, and the resistance of any two points is less than 10m omega;
and in the part of the aluminizer (5) which is wrapped from the cabin-penetrating cable (3) to the outer wall of the metal boss (4) and is lapped with the cabin plate, the resistance of any two points is less than 10m omega.
6. The shielding structure of the unshielded cable penetration high shielding requirement cabin according to claim 1, characterized in that: the resistance between the base of the metal boss (4) and the cabin body (1) is less than 10m omega.
7. The shielding structure of the cabin with high shielding requirement for penetrating the unshielded cable according to claim 1, wherein: the resistance of any two points at the part of the aluminum-plated film (5) wrapping the cabin-penetrating cable (3) is less than 15m omega.
8. The shielding structure of the cabin with high shielding requirement for penetrating the unshielded cable according to claim 1, wherein: the folds or the bending gaps of the aluminizer (5) are fixed by using an adhesive tape; the adhesive tape is a conductive adhesive tape.
9. The shielding structure of the cabin with high shielding requirement for penetrating the unshielded cable according to claim 1, wherein: the method for wrapping the cable by the aluminum-plated film (5) comprises the following steps: cutting each width of the aluminizer (5) to be about 30-50mm, and overlapping the front circle and the rear circle of the aluminizer (5) to be about 40-60% during winding; the cabin penetrating cable (3) is bundled to be wrapped by two layers of aluminizers (5), and the clockwise and anticlockwise directions of the two layers are opposite; after one aluminizer (5) is wound, the next aluminizer (5) starts to wrap 100-200mm backwards from the last finished position, and the contact position of the aluminizers (5) is fixed by an adhesive tape.
10. A shielding method for a non-shielded cable to penetrate a cabin (1) with high shielding requirement is characterized in that: the method comprises the following steps:
wrapping the cabin-penetrating cable (3) by using an aluminum-plated film (5), wherein the starting point and the end point of the wrapping are respectively the bottom of a socket connector base of the cabin-penetrating cable (3) and the cabin-penetrating position of the cable, and the aluminum-plated films (5) are reserved at two ends;
after a connector of the cabin-penetrating cable (3) is inserted into equipment, a reserved aluminizer (5) is completely wrapped to the connector and is in good lap joint with an equipment shell;
the metal boss (4) is arranged at the cable cabin penetrating hole (2) of the cabin body (1), the cabin penetrating cable (3) is taken out of the cabin through the boss cylindrical pipeline, and the reserved aluminum-plated film (5) completely wraps the outer wall of the boss and is in good lap joint with the cabin plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211058856.5A CN115568195A (en) | 2022-08-30 | 2022-08-30 | Shielding structure and method for cabin with high shielding requirement for penetration of unshielded cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211058856.5A CN115568195A (en) | 2022-08-30 | 2022-08-30 | Shielding structure and method for cabin with high shielding requirement for penetration of unshielded cable |
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| Publication Number | Publication Date |
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| CN115568195A true CN115568195A (en) | 2023-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211058856.5A Pending CN115568195A (en) | 2022-08-30 | 2022-08-30 | Shielding structure and method for cabin with high shielding requirement for penetration of unshielded cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116500348A (en) * | 2023-06-30 | 2023-07-28 | 北京智芯微电子科技有限公司 | Low-frequency electromagnetic measuring device and system |
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2022
- 2022-08-30 CN CN202211058856.5A patent/CN115568195A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116500348A (en) * | 2023-06-30 | 2023-07-28 | 北京智芯微电子科技有限公司 | Low-frequency electromagnetic measuring device and system |
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