CN103872526A - Electromagnetic shielding method of aviation plug - Google Patents
Electromagnetic shielding method of aviation plug Download PDFInfo
- Publication number
- CN103872526A CN103872526A CN201410107776.3A CN201410107776A CN103872526A CN 103872526 A CN103872526 A CN 103872526A CN 201410107776 A CN201410107776 A CN 201410107776A CN 103872526 A CN103872526 A CN 103872526A
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- aviation plug
- internal signal
- cable
- electromagnetic
- metal
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 230000002500 effect on skin Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention provides an electromagnetic shielding method of an aviation plug. The method comprises the specific operation steps that an internal signal line is vertically arranged on an outer metal shell and is made of metal; the outer side of the internal signal line is provided with a cable shielding layer which makes contact with the outer side face of the metal of the internal signal line in a 360-degree even surrounding lap joint mode; the outer side of the cable shielding layer and the outer side of the outer metal shell are respectively provided with shielding connection points, and an aviation plug shell is arranged between every two adjacent shielding connection points. Compared with the prior art, according to the electromagnetic shielding method of the aviation plug, influence caused by the skin effect is reduced by enlarging the cross sectional area of the cable shielding layer, high-frequency common mode impedance is reduced, interconnection reliability of electronic equipment is enhanced, and the electromagnetic shielding method is beneficial for reducing electromagnetic interference and improving electromagnetic tolerance.
Description
Technical field
The present invention relates to electromangnetic spectrum field, a kind of by improving the aviation plug electromagnetic shielding method of connected mode between aviation plug and shielded cable specifically.
Background technology
Along with development in science and technology, people improve constantly the interdependent degree of microcomputer, the electromagnetic environment that electronic equipment lives people is in a large number more complicated, therefore some external interference are as mechanical motor, impulsive noise, static, thunderbolt and voltage transient, the situation that can cause the misoperation of some electronic equipment control signals even directly to destroy, as radio communication, radar, broadcast receiver, TV, more even cause the misoperation in the use of medical equipment and have influence on aviation safety.
Therefore how highly reliable interconnected between raising equipment, especially military equipment, improve Electro Magnetic Compatibility, reduce electromagnetic interference, improving electromagnetism tolerance level need to pay close attention to, in the prior art, common shielded cable can adopt two-stage screen aluminium foil with metal net, shield effectiveness is mainly followed the material of metal net, suppleness and count have relation, in the situation that shielded cable is identical, how improving cable shielding layer can be most important to improving electromagnetic compatibility with the bridging method of aviation plug, electromagnetic compatibility test failure has very large relation therewith.Traditional connected mode twists into one cable shielding layer, and " pigtail " effect can increase the high-frequency resistance of screen, and this high-frequency resistance produces common-mode voltage, and then generation common mode current causes electromagnetic compatibility test failure.Based on this, now provide one can avoid " pigtail " effect, improve the compatible shielded cable of performance of installation electromagnetical and the method for attachment of aviation plug.
Summary of the invention
Technical assignment of the present invention is to solve the deficiencies in the prior art, and a kind of electromagnetic shielding method of aviation plug is provided.
Technical scheme of the present invention realizes in the following manner, the electromagnetic shielding method of this kind of aviation plug, and its concrete operation step is:
Internal signal wire is vertically mounted in metal chassis, and this internal signal wire is made of metal;
At the arranged outside cable shielding layer of internal signal wire, this cable shielding layer adopts 360 degree uniform ring to contact with the metal outer face of internal signal wire around the mode of overlap joint;
Outside and metal chassis outside at cable screen all arrange shielding tie point, between every two adjacent shields tie points, aviation plug shell are all installed.
The beneficial effect that the present invention compared with prior art produced is:
The electromagnetic shielding method of a kind of aviation plug of the present invention is by increasing cable shielding layer cross-sectional area, reduce the impact being brought by skin effect, reduce high frequency common mode impedance with this, improve the interconnected reliability of electronic equipment, be conducive to reduce electromagnetic interference and improve electromagnetism tolerance level, practical, applied widely, be easy to promote.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present invention.
Expression in accompanying drawing is respectively:
1, internal signal wire, 2, cable shielding layer, 3, shielding tie point, 4, aviation plug shell, 5, metal chassis.
Embodiment
Below in conjunction with accompanying drawing, the electromagnetic shielding method of a kind of aviation plug of the present invention is described in detail below.
As shown in Figure 1, the electromagnetic shielding method of this kind of aviation plug, its concrete operation step is:
At the arranged outside cable shielding layer 2 of internal signal wire 1, this cable shielding layer 2 adopts 360 degree uniform ring to contact with the metal outer face of internal signal wire 1 around the mode of overlap joint;
Outside and metal chassis 5 outsides at cable screen 2 all arrange shielding tie point 3, between every two adjacent shields tie points 3, aviation plug shell 4 are all installed.
The complete available inductance of screen of cable, electric capacity, Resistance model for prediction replaces, the in the situation that of high frequency, inductance plays a major role on the impact of common code impedance, if twisting into one, screening braid only have approximate single-point to be connected with a row mouthful plug like this, the impedance of high frequency work mould will increase like this, noise current will produce common-mode voltage, consequent common mode current will produce EMI noise, cable braid 360 degree are distributed in around cable, then aviation plug carries out 360 degree overlap joints, increase cable shielding layer cross-sectional area, reduce the impact being brought by skin effect, reduce high frequency common mode impedance with this, improve the interconnected reliability of electronic equipment, be conducive to reduce electromagnetic interference and improve electromagnetism tolerance level.The effect that becomes to taking here refers to: in the time of microwave frequency, the current density of conductor will can not be to be evenly distributed in whole conductor inside, but have larger current density near surface, and result increases its resistance.The increase of conductor resistance, also increases its loss power.
Except technical characterictic described in specification, be the known technology of those skilled in the art.
Claims (1)
1. an electromagnetic shielding method for aviation plug, is characterized in that: its concrete operation step is:
Internal signal wire is vertically mounted in metal chassis, and this internal signal wire is made of metal;
At the arranged outside cable shielding layer of internal signal wire, this cable shielding layer adopts 360 degree uniform ring to contact with the metal outer face of internal signal wire around the mode of overlap joint;
Outside and metal chassis outside at cable screen all arrange shielding tie point, between every two adjacent shields tie points, aviation plug shell are all installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410107776.3A CN103872526A (en) | 2014-03-21 | 2014-03-21 | Electromagnetic shielding method of aviation plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410107776.3A CN103872526A (en) | 2014-03-21 | 2014-03-21 | Electromagnetic shielding method of aviation plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103872526A true CN103872526A (en) | 2014-06-18 |
Family
ID=50910797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410107776.3A Pending CN103872526A (en) | 2014-03-21 | 2014-03-21 | Electromagnetic shielding method of aviation plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103872526A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114496381A (en) * | 2022-01-28 | 2022-05-13 | 苏州浪潮智能科技有限公司 | Method for improving magnetic field shielding effectiveness of cable and cable |
-
2014
- 2014-03-21 CN CN201410107776.3A patent/CN103872526A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114496381A (en) * | 2022-01-28 | 2022-05-13 | 苏州浪潮智能科技有限公司 | Method for improving magnetic field shielding effectiveness of cable and cable |
| CN114496381B (en) * | 2022-01-28 | 2023-08-04 | 苏州浪潮智能科技有限公司 | Method for improving magnetic field shielding effectiveness of cable and cable |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140618 |