WO2018126582A1

WO2018126582A1 - Electromagnetic pulse protection device having cylindrical structure

Info

Publication number: WO2018126582A1
Application number: PCT/CN2017/084468
Authority: WO
Inventors: 王羚; 邓力; 李书芳; 张贯京; 葛新科; 高伟明; 张红治
Original assignee: 深圳市景程信息科技有限公司
Priority date: 2017-01-07
Filing date: 2017-05-16
Publication date: 2018-07-12
Also published as: CN106802112A

Abstract

An electromagnetic pulse protection device having a cylindrical structure. The device (1) consists of multiple stacked annular protection layers (10), wherein each of the annular protection layers (10) is provided with multiple circular tracks arranged from an inner side to an outer side, and each of the circular tracks is provided with multiple sequentially arranged protection units (100). The device of the present invention can fully reflect, absorb, or attenuate electromagnetic pulses, such that a protected object is not influenced by the electromagnetic pulses, thus effectively preventing electromagnetic pulse damage on an electronic information system, and increasing a service life of the electronic information system.

Description

Electromagnetic pulse protection device with cylindrical structure

[0001] The present invention relates to the field of electromagnetic protection, and in particular, to an electromagnetic pulse protection device with a cylindrical structure.

Background technique

[0002] Electromagnetic pulses have a wide range of effects, high peak field strength, short rise time, wide frequency range, and high lethality. They not only pose a threat to the current miniaturization and integration of electronic information systems, but also The human body has caused various degrees of damage, which has become a great hidden danger. The emergence and maturity of electromagnetic pulse weapons has seriously affected the military security and social stability of countries all over the world.

[0003] Based on different uses, existing protection methods can be divided into circuit level protection methods and space level protection methods, the former for conducting electromagnetic pulses in the protection circuit and the latter for protecting the electromagnetic pulse field in the space. Circuit-level protection devices are mainly limited to amplitudes, filters, etc. Existing circuit-level protection devices are limited in protection bandwidth, there is insertion loss and insertion loss increases and noise occurs under the action of high-power electromagnetic pulses. Permanent damage such as deterioration of the coefficient. Space-level protection methods mainly include frequency selective surfaces, energy selective surfaces, metamaterial absorbers, and new materials (such as nanomaterials, graphene, plasma). Their protective bandwidth is limited, and there is no guarantee that the total reflection absorbs or attenuates the electromagnetic pulse. The protected object is more or less affected by the electromagnetic pulse, and the energy selective surface still exists before the protection function is fully activated. There is a hidden danger in the leakage of electromagnetic waves during a period of time.

technical problem

The main object of the present invention is to provide an electromagnetic pulse protection device of a cylindrical structure, which aims to solve the technical problem of shielding electromagnetic pulses.

Problem solution

Technical solution

[0005] In order to achieve the above object, the present invention provides an electromagnetic pulse protection device of a cylindrical structure, wherein the electromagnetic pulse protection device of the cylindrical structure is composed of a plurality of annular protective layers, wherein each annular protective layer is A plurality of circular tracks are arranged inside and outside, and a plurality of protection units are continuously arranged on each circular track, and the dielectric constant of each protection unit is Magnetic permeability

among them:

·■ .

It is the inner radius of the annular protective layer, b is the outer radius of the annular protective layer, and r is the radius of the protective unit to the center of the protective layer in the annular protective layer.

[0007] Preferably, the protection unit is a square structure.

[0008] Preferably, the length, width and height of each protection unit are smaller than the thickness d, wherein d is calculated as follows:

For the speed of light.

For the electromagnetic pulse frequency.

Preferably, the electromagnetic pulse frequency is a triangular electromagnetic pulse, a rectangular electromagnetic pulse, a sinusoidal electromagnetic pulse or a Gaussian electromagnetic pulse. Advantageous effects of the invention

Beneficial effect

[0010] The present invention adopts the above technical solution, and brings the technical effects as follows: The electromagnetic pulse protection device of the cylindrical structure of the present invention can completely reflect, absorb or attenuate the electromagnetic pulse, and the protected object is not subjected to the electromagnetic pulse. The effect is to effectively avoid the electromagnetic pulse damage suffered by the electronic information system and prolong the life of the electronic information system.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of an electromagnetic pulse protection device of a cylindrical structure of the present invention;

2 is a cross-sectional view showing a preferred embodiment of an electromagnetic pulse guard of a cylindrical structure according to the present invention; [0013] FIG. 3 is a schematic view showing a layout of a guard unit in an electromagnetic pulse guard of a cylindrical structure of the present invention; [0014] Figure 4-a to Figure 4-c are schematic diagrams showing the simulation of the triangular electromagnetic pulse of the electromagnetic pulse protection device of the cylindrical structure of the present invention;

[0015] FIGS. 5-a to 5-c are schematic views of the electromagnetic pulse guard of the cylindrical structure of the present invention for a rectangular electromagnetic pulse;

6-a to 6-c are schematic views of the electromagnetic pulse guard of the cylindrical structure of the present invention for a sinusoidal electromagnetic pulse; [0016] FIG.

7-a to 7-c are schematic diagrams of the electromagnetic pulse guard of the cylindrical structure of the present invention for Gaussian electromagnetic pulses.

[0018] The objects, features, and advantages of the present invention will be further described in conjunction with the embodiments.

BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments, structures, features and functions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 to 3, FIG. 1 is a schematic structural view of an electromagnetic pulse protection device of a cylindrical structure of the present invention. 2 is a cross-sectional view showing a preferred embodiment of the electromagnetic pulse guard of the cylindrical structure of the present invention; and FIG. 3 is a schematic view showing the layout of the guard unit in the electromagnetic pulse guard of the cylindrical structure of the present invention. The electromagnetic pulse protection device 1 of the cylindrical structure of the present invention is composed of a plurality of annular protective layers 10 stacked. Each of the annular protective layers 10 has a thickness d. Further, as shown in FIG. 2, each of the annular protective layers 10 includes a plurality of guard units 100 therein. Each of the annular protective layers 10 is provided with a plurality of circular tracks from the inside to the outside, and a plurality of protection units 100 are continuously disposed on each of the circular tracks. In this embodiment, the protection unit 100 is a square structure, wherein the length, width, and height of each protection unit 100 are less than the thickness d, wherein d is calculated as follows:

For the speed of light constant,

The maximum frequency corresponding to the frequency range in which the electromagnetic pulse energy is concentrated (the frequency range of the electromagnetic pulse is positive infinity to negative infinity, but the energy of the electromagnetic pulse is mainly concentrated in a certain frequency range,

The maximum frequency corresponding to the frequency range in which the electromagnetic pulse energy is concentrated). For a rectangular pulse, a duration of 1 nanosecond inches, the rectangular pulse energy is concentrated in 0-10GH _Z, according to the

In centimeters, the size of each guard unit 100 is less than or equal to d = /3 = 3m / 3 = lcm.

[0021] The dielectric constant of each of the guard units 100 is, and the magnetic permeability is.

[0022] wherein

[0023] wherein, is the inner radius of the annular protective layer, b is the outer radius of the annular protective layer, and r is the radius of the protective unit to the center of the protective layer in the annular protective layer.

[0024] That is to say, if each of the protection units 100 has the dielectric constant calculated as described above and the magnetic permeability is the material to be fabricated, the protection against the electromagnetic pulse can be completed. It should be noted that the dielectric constants and magnetic permeability of the shielding units 100 at different positions on each of the annular protective layers 10 are not the same. A plurality of protection units 100 made of a plurality of different materials can form an electromagnetic pulse protection, that is, a propagation path of electromagnetic waves based on conformal transformation theory and optical transformation theory (refer to 2006, U. Leonhardt and JBPendry, respectively) In the journal Science, the theory of conformal transformation and the theory of optical transformation are proposed to guide the propagation path of electromagnetic waves to protect electromagnetic pulses. Since the theory of conformal transformation and the theory of optical transformation are prior art, they will not be described here. The material may be any other suitable material such as nanomaterials of different specifications, graphene materials, plasma materials, and the like.

[0025] In order to verify the protective performance of the electromagnetic pulse guard 1 of the cylindrical structure, four types of electromagnetic pulses are used to verify the protective performance of the electromagnetic pulse guard 1 of the cylindrical structure.

[0026] wherein, FIG. 4-a to FIG. 4-c are schematic diagrams of simulation of the electromagnetic pulse guard of the cylindrical structure of the present invention for the triangular electromagnetic pulse, as can be seen from FIG. 4-a to FIG. 4-c, the triangular electromagnetic pulse After the electromagnetic pulse protection device 1 of the cylindrical structure (parameter a=0.3 m, b=0.7 m, the rectangular pulse continues to range from 0 to 35 ns), the inner circle of the electromagnetic pulse protection device 1 has no triangular electromagnetic The pulse passes.

[0027] FIG. 5-a to FIG. 5-c are schematic diagrams showing the simulation of the rectangular electromagnetic pulse of the electromagnetic pulse protection device of the cylindrical structure of the present invention. As can be seen from FIG. 5-a to FIG. 5-c, the rectangular electromagnetic pulse passes through the The electromagnetic pulse protection device of the cylindrical structure 1吋 (parameter a=0.3m, b=0.7m, rectangular electromagnetic pulse continuous range 0-35n s), the inner circle of the electromagnetic pulse protection device 1 has no rectangular pulse After

6-a to FIG. 6-c are schematic diagrams showing the simulation of the sinusoidal electromagnetic pulse of the electromagnetic pulse protection device of the cylindrical structure of the present invention. As can be seen from FIG. 6-a to FIG. 6-c, the sinusoidal electromagnetic pulse passes through the The electromagnetic pulse protection device of the cylindrical structure 1吋 (parameter a=0.3m, b=0.7m, sinusoidal electromagnetic pulse continuous range 0-35n s), the inner circle of the electromagnetic pulse protection device 1 has no sinusoidal pulse After

[0029] FIGS. 7-a to 7-c are simulations of the electromagnetic pulse guard of the cylindrical structure of the present invention for Gaussian electromagnetic pulses. True schematic diagram, as can be seen from Fig. 7-a to Fig. 7-c, the Gaussian electromagnetic pulse passes through the electromagnetic pulse protection device 1 of the cylindrical structure (parameter a = 0.3 m, b = 0.7 m, Gaussian electromagnetic pulse continues The inter-turn range is 0-35n s), and the inner circle of the electromagnetic pulse guard 1 does not have a Gaussian pulse.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the contents of the drawings, or indirectly or indirectly The technical field is equally included in the scope of patent protection of the present invention.

Industrial applicability

[0031] The present invention adopts the above technical solution, and brings the technical effects that: the electromagnetic pulse protection device of the cylindrical structure of the invention can completely reflect, absorb or attenuate the electromagnetic pulse, and the protected object is not subjected to the electromagnetic pulse. The effect is to effectively avoid the electromagnetic pulse damage suffered by the electronic information system and prolong the life of the electronic information system.

Claims

Claim

[Claim 1] A cylindrical structure electromagnetic pulse protection device, wherein the electromagnetic pulse protection device of the cylindrical structure is composed of a plurality of annular protective layers, wherein each annular protective layer is from inside to outside A plurality of circular tracks are arranged, and a plurality of protection units are continuously arranged on each circular track, and each of the protection units has a dielectric constant, and a magnetic permeability, wherein:

Ετ =■ = + 1—

It is the inner radius of the annular protective layer, b is the outer radius of the annular protective layer, and _r is the radius of the protective unit to the center of the protective layer in the annular protective layer.

[Claim 2] The electromagnetic pulse guard of the cylindrical structure according to claim 1,

The protection unit is a square structure. ύ ,

[Claim 3] The electromagnetic pulse guard of the cylindrical structure according to claim 2, wherein the length, width and height of each guard unit are smaller than the thickness d, wherein d is calculated as follows:

It is the maximum speed of the light speed constant, which corresponds to the frequency range in which the electromagnetic pulse energy is concentrated.

[Claim 4] The electromagnetic pulse guard of the cylindrical structure according to claim 4, wherein the electromagnetic pulse frequency is a triangular electromagnetic pulse, a rectangular electromagnetic pulse, a sinusoidal electromagnetic pulse or a Gaussian electromagnetic pulse.