Electromagnetic shielding structure and system for special vehicles

Abstract

The utility model discloses an electromagnetic shielding structure and system for special vehicles, comprising a shielding layer, wherein the shielding layer comprises a high-conductivity layer and a high-magnetic permeability layer, wherein the high-conductivity layer and the high-magnetic permeability layer are arranged adjacent to each other; the high-conductivity layer and the high-magnetic permeability layer are connected by a conductive adhesive; the beneficial effects of the utility model are as follows: a composite structure is adopted, the material weight is light, and the high-conductivity and high-magnetic permeability materials are combined, so that low-frequency electromagnetic waves can be shielded, and high-frequency electromagnetic waves can also be shielded, and the application range is wide; at the same time, the electromagnetic shielding ability is strong and the shielding effect is good, so that electromagnetic protection for the drivers and equipment inside the special vehicles is better realized.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle electromagnetic shielding, in particular to a special vehicle electromagnetic shielding structure and system. Background Art

[0002] The transient high voltage generated by electromagnetic induction of electromagnetic pulses can also cause permanent damage to communication systems; it may degrade the performance of sensitive components or circuits, mainly manifested in a series of abnormal phenomena such as abnormal semiconductor devices, current failing to reach the expected amplitude, increased leakage, and melting of metal strips due to heat; it may also form a cumulative effect, which has no obvious phenomenon during pulse radiation but poses potential hazards, reducing the reliability of circuits or equipment and causing results that are inconsistent with the expected values ​​in the early design.

[0003] Electromagnetic shielding is a product of the development of the electronic technology industry. It belongs to a relatively special type of industry, involving electronic stand-alone products, network hardware, instruments and meters, radio equipment and other component product fields. It is also widely used in movable spaces such as the cabs and cabins of special vehicles.

[0004] Since the early 1990s, special vehicles have undergone major changes in raw materials, structural design, and processes, forming some test standards in the electromagnetic shielding industry, and the industry has become more and more standardized. Electromagnetic shielding has become one of the most basic performance requirements for special vehicles, and is a professional technology that can better realize active protection for the drivers and equipment inside special vehicles. Electromagnetic shielding can also conceal the equipment and geographical location inside the vehicle, making it difficult to be detected and identified by external electromagnetic signals.

[0005] In order to cope with complex electromagnetic pulse environments and provide an effective solution to ensure the safety and normal operation of electronic equipment in vehicle cabins, an electromagnetic shielding structure and system for special vehicles is urgently needed. Utility Model Content

[0006] The purpose of the utility model is to solve the above-mentioned problems. An electromagnetic shielding structure and system for special vehicles are designed. A composite structure is adopted with light material weight, and high conductive and high magnetic conductive materials are combined. It can shield low-frequency electromagnetic waves as well as high-frequency electromagnetic waves, and has a wide range of applications. At the same time, it has strong electromagnetic shielding capability and good shielding effect, and solves the electromagnetic shielding problems of special vehicle electrical systems.

[0007] To achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a special vehicle electromagnetic shielding structure includes a shielding layer, characterized in that the shielding layer includes a high conductive layer and a high magnetic permeability layer, the high conductive layer and the high magnetic permeability layer are arranged adjacent to each other; the high conductive layer and the high magnetic permeability layer are connected by a conductive adhesive;

[0008] The high conductive layer comprises a first high conductive layer and a second high conductive layer, wherein the first high conductive layer, the high magnetic permeability layer, and the second high conductive layer are arranged in sequence;

[0009] The first high conductive layer, the high magnetic permeability layer, and the second high conductive layer are connected by conductive glue;

[0010] The high conductive layer is one of aluminum, copper and silver, and the high magnetic permeability layer is a Permalloy layer or a ceramic particle layer;

[0011] The inner and outer sides of the shielding layer are respectively provided with inner and outer parts;

[0012] One of the high conductive layers of the shielding layer is arranged in a staggered layer with the high magnetic permeability layer.

[0013] Preferably, the highly conductive layer is at least one of a plate, a cloth, a film, and a mesh structure.

[0014] Preferably, the high magnetic permeability layer is at least one of a plate, a cloth, a film, and a mesh structure.

[0015] Preferably, the conductive adhesive is epoxy copper powder adhesive.

[0016] Preferably, the high conductive layer comprises a first high conductive layer and a second high conductive layer, and the first high conductive layer, the high magnetic permeability layer and the second high conductive layer are arranged in sequence.

[0017] Preferably, inner and outer parts are respectively provided on the inner and outer sides of the shielding layer.

[0018] Preferably, the shielding layer forms an overlapping structure with the inner component and the outer component, forming a uniform structural surface for the flow of current and avoiding the formation of a potential difference between two interconnected metals.

[0019] The electromagnetic shielding system for special vehicles is characterized by comprising an inner layer formed by the electromagnetic shielding structure of the special vehicle, and the inner layer is pasted inside the box body of the special vehicle.

[0020] Preferably, the special vehicle box is provided with a power port opening, and an electromagnetic pulse protection device is provided at the power port opening. The electromagnetic pulse protection device is installed through the wall. The electromagnetic pulse protection device includes an energy discharge part and a filtering part, and the energy discharge part is connected to the filtering part; the energy discharge part includes a primary energy discharge unit, a decoupling unit, and a secondary energy discharge unit connected in sequence, the primary energy discharge unit adopts an overvoltage protection device, and the decoupling unit adopts a magnetic ring wire-wound inductor; the secondary energy discharge unit adopts a bidirectional voltage regulator diode.

[0021] Beneficial effects: The electromagnetic shielding structure and working method of special vehicles manufactured by the technical solution of the utility model adopt a composite structure, light material weight, and combine high conductive and high magnetic conductive materials. It can shield low-frequency electromagnetic waves and high-frequency electromagnetic waves, and has a wide range of applications. At the same time, it has strong electromagnetic shielding capability and good shielding effect, solves the electromagnetic shielding problem solved by special vehicle electrical systems, and better realizes electromagnetic protection for drivers and passengers and equipment inside special vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the electromagnetic shielding structure of a special vehicle according to Example 1 of the utility model.

[0023] Figure 2 This is a schematic structural diagram of the electromagnetic shielding structure of a special vehicle according to Example 2 of the utility model.

[0024] Figure 3 This is a schematic structural diagram of the electromagnetic shielding structure of a special vehicle according to Example 5 of the utility model.

[0025] Figure 4 This is a first assembly schematic diagram of the horizontal overlap of two shielding layers of the special vehicle electromagnetic shielding structure of Example 5 described in the utility model.

[0026] Figure 5 This is a second assembly schematic diagram of the horizontal overlap of two shielding layers of the special vehicle electromagnetic shielding structure of Example 5 described in the utility model.

[0027] Figure 6 This is a third assembly schematic diagram of the horizontal overlap of the two shielding layers of the special vehicle electromagnetic shielding structure of Example 5 described in the utility model.

[0028] Figure 7 This is a first assembly schematic diagram of two shielding layers vertically overlapped in the special vehicle electromagnetic shielding structure of Example 5 described in the utility model.

[0029] Figure 8 This is a second assembly schematic diagram of the two shielding layers of the special vehicle electromagnetic shielding structure of Example 5 described in the utility model being vertically overlapped.

[0030] Fig. 9 This is a third assembly schematic diagram of the vertical overlap of two shielding layers of the special vehicle electromagnetic shielding structure of Example 5 described in the utility model.

[0031] Fig.10 This is a structural schematic diagram of the horizontal overlap of two shielding layers of the special vehicle electromagnetic shielding structure of Example 6 described in the utility model.

[0032] Fig.11This is a schematic diagram of the installation of the electromagnetic pulse protection device of the special vehicle electromagnetic shielding system of Example 7 described in the utility model.

[0033] Fig.12 This is the structural frame diagram of the electromagnetic pulse protection device of the special vehicle electromagnetic shielding system of Example 8 described in the utility model.

[0034] Fig.13 This is a circuit diagram of the electromagnetic pulse protection device of the special vehicle electromagnetic shielding system of Example 8 described in the utility model.

[0035] In the figure: 1. shielding layer, 2. high conductive layer, 2-1. first high conductive layer, 2-2. second high conductive layer, 3. high magnetic permeability layer, 4. inner parts, 5. outer parts, 6. special vehicle box, 7. electromagnetic pulse protection device, 7-1. energy discharge part, 7-1-1. primary energy discharge unit, 7-1-2. decoupling unit, 7-1-3. secondary energy discharge unit, 7-2. filtering part, 7-3. shell, 7-3-1. partition, 7-3-2. first cavity, 7-3-3. second cavity, 7-4. incoming terminal, 7-5. outgoing terminal. DETAILED DESCRIPTION

[0036] The utility model is described in detail below in conjunction with the accompanying drawings. As shown in the drawings, the electromagnetic shielding structure and system of a special vehicle.

[0037] The electromagnetic shielding structure of a special vehicle comprises a shielding layer 1, wherein the shielding layer 1 comprises a high conductive layer 2 and a high magnetic permeability layer 3, wherein the high conductive layer 2 and the high magnetic permeability layer 3 are arranged adjacent to each other; and the high conductive layer 2 and the high magnetic permeability layer 3 are connected by a conductive adhesive;

[0038] The high conductive layer 2 includes a first high conductive layer 2-1 and a second high conductive layer 2-2, wherein the first high conductive layer 2-1, the high magnetic permeability layer 3, and the second high conductive layer 2-2 are connected by conductive glue;

[0039] The high conductive layer 2 is one of aluminum, copper and silver, and the high magnetic permeability layer 3 is a Permalloy layer or a ceramic particle layer;

[0040] The inner and outer sides of the shielding layer 1 are respectively provided with an inner component 4 and an outer component 5;

[0041] One of the high conductive layers 2 of the shielding layer 1 is arranged in a staggered layer with the high magnetic permeability layer 3 .

[0042] The highly conductive layer 2 is at least one of a plate, a cloth, a film, and a mesh structure.

[0043] The high magnetic permeability layer 3 is at least one of a plate, a cloth, a film, and a mesh structure.

[0044] The conductive adhesive is epoxy copper powder adhesive.

[0045] An inner component 4 and an outer component 5 are respectively disposed on the inner and outer sides of the shielding layer 1 .

[0046] The shielding layer 1 forms an overlapping structure with the inner component 4 and the outer component 5, forming a uniform structural surface for the flow of current and avoiding the formation of a potential difference between two metals connected to each other.

[0047] The special vehicle electromagnetic shielding system comprises an inner layer formed by the special vehicle electromagnetic shielding structure, and the inner layer is pasted inside the special vehicle box 6.

[0048] Preferably, the special vehicle box 6 is provided with a power port opening, and an electromagnetic pulse protection device 7 is provided at the power port opening, and the electromagnetic pulse protection device 7 is installed in a through-wall manner; the electromagnetic pulse protection device 7 includes an energy discharge part 7-1 and a filter part 7-2, and the energy discharge part 7-1 is connected to the filter part 7-2; the energy discharge part 7-1 includes a primary energy discharge unit 7-1-1, a decoupling unit 7-1-2, and a secondary energy discharge unit 7-1-3 connected in sequence, the primary energy discharge unit 7-1-1 adopts an overvoltage protection device, and the decoupling unit 7-1-2 adopts a magnetic ring wire-wound inductor; the secondary energy discharge unit 7-1-3 adopts a bidirectional voltage regulator diode. Example 1

[0049] The electromagnetic shielding structure of a special vehicle includes a shielding layer 1, wherein the shielding layer 1 includes a high conductive layer 2 and a high magnetic permeability layer 3, wherein the high conductive layer 2 and the high magnetic permeability layer 3 are arranged adjacent to each other; and the high conductive layer 2 and the high magnetic permeability layer 3 are connected by conductive glue.

[0050] The high conductive layer 2 and the high magnetic permeability layer 3 are both film structures. The high conductive layer 2 is made of copper, and the high magnetic permeability layer 3 is made of a Permalloy layer.

[0051] Permalloy usually refers to an iron-nickel alloy with a nickel content in the range of 30-90%. It is a soft magnetic alloy with a wide range of applications. Through appropriate processes, magnetic properties can be effectively controlled, such as an initial magnetic permeability of more than 105, a maximum magnetic permeability of more than 106, a coercive force as low as 2‰ Oersted, and a rectangular coefficient close to 1 or close to 0. Permalloy with a face-centered cubic crystal structure has good plasticity and can be processed into 1μm ultra-thin strips and various forms of use. Commonly used alloys include 1J50, 1J79, 1J85, etc. It is known for its very high magnetic permeability, which makes it useful as a core material for electrical and electronic equipment, and can also be used for magnetic shielding to shield magnetic fields. Example 2

[0052] The electromagnetic shielding structure of a special vehicle comprises a shielding layer 1, wherein the shielding layer 1 comprises two high-conductive layers 2 and one high-magnetic permeability layer 3, wherein the two high-conductive layers 2 and the one high-magnetic permeability layer 3 are arranged adjacent to each other;

[0053] The two high conductive layers 2 are respectively a first high conductive layer 2-1 and a second high conductive layer 2-2. The first high conductive layer 2-1, the high magnetic permeability layer 3, and the second high conductive layer 2-2 are arranged in sequence.

[0054] The first high conductive layer 2 - 1 , the high magnetic permeability layer 3 , and the second high conductive layer 2 - 2 are connected by conductive adhesive to form a “sandwich” structure.

[0055] The high conductive layer 2 and the high magnetic permeability layer 3 are both film structures. The high conductive layer 2 is made of one of copper, aluminum, and silver, and copper is often used in practical applications. The first high conductive layer 2-1 and the second high conductive layer 2-2 can be made of the same material or different materials. The high magnetic permeability layer 3 is made of a Permalloy layer. Example 3

[0056] Technical features different from Example 1 or 2:

[0057] The high conductive layer 2 is at least one of a plate, cloth, and mesh structure, and the high magnetic permeability layer 3 is at least one of a plate, cloth, and mesh structure. The first high conductive layer 2-1 and the second high conductive layer 2-2 can have the same structure or different structures. Example 4

[0058] Technical features different from embodiments 1, 2, and 3:

[0059] The high magnetic permeability layer 3 is a ceramic particle layer. The ceramic particle layer uses ferrite. The ferrite layer is a ceramic material with high magnetic permeability and can form electromagnetic shielding.

[0060] The high conductive layer 2 uses a copper shielding layer 1. Copper is a conductive metal that provides excellent electromagnetic shielding performance and is relatively corrosion-resistant to avoid external electromagnetic interference.

[0061] The combination of the high magnetic permeability layer 3 and the high conductive layer 2 can effectively avoid affecting the performance of the electrical body in the special vehicle box 6, causing unstable operation and causing safety accidents, increase protection against electromagnetic interference, and effectively resist external electromagnetic interference, thereby improving the stability of the operation of instruments and equipment in the special vehicle box 6. Example 5

[0062] Technical features different from Examples 2, 3, and 4:

[0063] The inner and outer sides of the shielding layer 1 are respectively provided with inner and outer parts 4 and 5, and the shielding layer 1 forms an overlap structure with the inner and outer parts 4 and 5, forming a uniform structural surface for the flow of current, avoiding the formation of a potential difference between the two metals connected to each other. One of the high conductive layers 2 of the shielding layer 1 is staggered with the high magnetic permeability layer 3. Specifically: the two shielding connections are connected to the shielding layer 1, and the inner and outer parts 4 and 5 are respectively provided on the inner and outer sides of the vertical connection of the two shielding layers 1, and the inner and outer parts 4 and 5 are respectively provided on the inner and outer sides of the overlap of the two shielding layers 1 on the same plane.

[0064] At the connection point of the two shielding layers 1, the first high conductive layer 2-1, the high magnetic permeability layer 3, and the second high conductive layer 2-2 of the shielding layer 1 are staggered. Specifically, the first high conductive layer 2-1 and the high magnetic permeability layer 3 are a group and have the same length, the second high conductive layer 2-2 is shorter than the high magnetic permeability layer 3, and the first high conductive layer 2-1, the high magnetic permeability layer 3, and the second high conductive layer 2-2 form a staggered structure.

[0065] When the first high conductive layer 2-1 and the high magnetic permeability layer 3 are a group and have the same length, the second high conductive layer 2-2 is shorter than the high magnetic permeability layer 3, and the inner and outer sides of the shielding layer 1 are respectively provided with an inner cladding 4 and an outer cladding 5, the outer cladding 5 connects the first high conductive layer 2-1 of the two overlapping shielding layers 1, and the inner cladding 4 simultaneously connects the high magnetic permeability layer 3 and the second high conductive layer 2-2 of the two overlapping shielding layers 1, that is, the inner cladding 4 simultaneously connects the two layers of the two overlapping shielding layers 1, so that one inner cladding 4 simultaneously connects the two layers of the shielding layer 1. The uniform structural surface formed by the overlapping structure avoids electromagnetic interference caused by such potential difference. The key to good overlapping is the close contact between the metal surfaces. The overlapping structure ensures the close contact between the metal surfaces and ensures that the overlapping joint or the jumper can withstand the expected current. In order to prevent electrochemical corrosion, the same metal should be used for overlapping. When different metals are used for overlapping, metals in the same group in the electrochemical sequence table should be selected as overlapping materials as much as possible.

[0066] That is, the inner component 4 and the outer component 5 must be made of the same material as the high conductive layer 2. The high conductive layer 2 is made of one of aluminum, copper and silver. The size range of the inner component 4 covers the staggered range of the shielding layer 1 and extends to the second high conductive layer 2-2.

[0067] The thickness of the inner and outer components 4 and 5 is equivalent to that of the high conductive layer, and the inner and outer components 4 and 5 can be at least one of a plate, a cloth, and a membrane structure.

[0068] The inner member 4 and the outer member 5 are plates, and the inner member 4 is a rigid structure that is completely in contact with the staggered structure of the two shielding layers 1. Figure 4 and Figure 5 , Figure 7 and Figure 8 .

[0069] The inner member 4 and the outer member 5 are made of cloth or film. The inner member 4 is a flexible structure and can be completely fitted with the staggered structure of the two shielding layers 1, or can be partially fitted to ensure that the high magnetic permeability layer 3 and the first high conductive layer 2-1 of the two shielding layers 1 are connected at the same time to form a good conduction. Figure 6 ,like Fig. 9 . Example 6

[0070] Technical features different from Example 5:

[0071] The second high conductive layer 2-2 and the high magnetic permeability layer 3 are a group and have the same length. The first high conductive layer 2-1 is shorter than the high magnetic permeability layer 3. The first high conductive layer 2-1, the high magnetic permeability layer 3 and the second high conductive layer 2-2 form a staggered structure. Example 7

[0072] Technical features different from embodiments 1, 2, 3, 4, 5, and 6:

[0073] The special vehicle electromagnetic shielding system comprises an inner layer formed by the special vehicle electromagnetic shielding structure, and the inner layer is pasted inside the special vehicle box 6.

[0074] The special vehicle box 6 can be a driving cabin of the special vehicle or a working cabin of the special vehicle.

[0075] To ensure the shielding effectiveness of high-performance shielded shelters, in addition to strict shielding design of the shelters, filtering measures with the same frequency band to be suppressed must be taken for power lines and signal lines entering and leaving the shelters. The filters used in the shelters are divided into power line filters and signal line filters. The installation and connection between the filter and the shelter plays an extremely important role in ensuring the high-frequency shielding characteristics of the shelter, and must be installed through the wall.

[0076] The special vehicle box 6 is provided with a power port opening, and a power electromagnetic pulse protection device 7 is provided at the power port opening. Example 8

[0077] Technical features different from embodiments 1, 2, 3, 4, 5, 6, and 7:

[0078] The electromagnetic pulse protection device 7 includes an energy discharge part 7-1 and a filtering part 7-2, and the energy discharge part 7-1 and the filtering part 7-2 are connected; the energy discharge part 7-1 includes a primary energy discharge unit 7-1-1, a decoupling unit 7-1-2, and a secondary energy discharge unit 7-1-3 which are connected in sequence, the primary energy discharge unit 7-1-1 adopts an overvoltage protection device, and the decoupling unit 7-1-2 adopts a magnetic ring wire-wound inductor; the secondary energy discharge unit 7-1-3 adopts a bidirectional voltage regulator diode.

[0079] The first-level energy discharge unit 7-1-1 uses an overvoltage protection device. RV1-RV7 is an overvoltage protection device, a 34S471 varistor, a pin-welded multi-core copper wire copper nose screwed to the filter outlet port, and the potting material is encapsulated in the groove of the metal shell 7-3 outlet end;

[0080] The decoupling unit 7-1-2 uses magnetic ring wire wound inductors; L1, L6, L11, and L16 are D55*H40 / 68uH magnetic ring wire wound inductors, 4 in series in each circuit, with an inductance of approximately 6mm2 four-core copper enameled wire directly wound in the main circuit, and the potting material is encapsulated in the metal shell 7-3.

[0081] The secondary energy discharge unit 7-1-3 uses a bidirectional voltage regulator diode. D1-D7 is a 10KA / 380CV bidirectional voltage regulator diode, and the potting material is encapsulated in the metal shell 7-3.

[0082] The filtering section 7-2 uses a low-pass filter.

[0083] Among them, C1 / C7 / C13 / C19 are D38*H30 / 1uF high-frequency resonant capacitors, which are connected in parallel between the main circuit and the metal shell ground. The capacitor screw electrodes are connected to the main circuit through screw crimping welding pieces, and the metal shell clamps the conductive wire mesh and is fastened to the shielding box shell with screws.

[0084] L2-L5 / L7-L10 / L12-L15 / L17-L20 are D55*H40 / 68uH magnetic toroidal wire wound inductors, 4 in series in each circuit, the inductance is about series, the main circuit is about 6mm2 four-core copper enameled wire directly wound, and the potting material is encapsulated in the metal shell 7-3.

[0085] C2-C5 / C8-C11 / C14-C17 / C20-C23 are intermediate two-stage 450VAC / 10uF capacitors, with dimensions of D30*H50, and are potted in a metal shell 7-3.

[0086] C6 / C12 / C18 / C24 are customized D21.5*H21.5 / 1uF high-frequency resonant capacitors, connected in parallel between the main circuit and the metal casing ground, and the capacitor screw electrodes are connected to the main circuit through screw crimping welding pieces.

[0087] The electromagnetic pulse protection device 7 also includes a housing 7-3, in which the energy discharge part 7-1 and the filter part 7-2 are arranged. It also includes an incoming terminal 7-4 and an outgoing terminal, and the incoming terminal 7-4, the energy discharge part 7-1, the filter part 7-2, and the outgoing terminal are connected in sequence;

[0088] The incoming line terminal is a bolt-threaded welding piece and / or copper busbar connection; the outgoing line terminal is a threaded tube, and the outgoing line is reserved for output cables to pass through the threaded tube and lead into the room, and the threaded tube is screwed (threaded) to the shielding room.

[0089] A partition 7-3-1 is arranged in the shell 7-3, and the shell 7-3 is divided into a first cavity 7-3-2 and a second cavity 7-3-3 by the partition 7-3-1. The external energy discharge part 7-1 is arranged in the first cavity 7-3-2, and the filter part 7-2 is arranged in the second cavity 7-3-3.

[0090] The shell is made of conductive treated metal, and the shielding shell is preferably made of welded stainless steel with a thickness of 1.5-2.5 mm, and is fully welded by aluminum fusion welding. The shell 7-3 is completely electromagnetically sealed except for the input terminal 7-4 and the output terminal.

[0091] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the utility model. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the utility model and fall within the protection scope of the utility model.

Claims

1. A special vehicle electromagnetic shielding structure, comprising a shielding layer, characterized in that: The shielding layer comprises a high conductive layer and a high magnetic permeability layer, wherein the high conductive layer and the high magnetic permeability layer are arranged adjacent to each other; the high conductive layer and the high magnetic permeability layer are connected by conductive glue; The high conductive layer comprises a first high conductive layer and a second high conductive layer, wherein the first high conductive layer, the high magnetic permeability layer, and the second high conductive layer are arranged in sequence; The first high conductive layer, the high magnetic permeability layer, and the second high conductive layer are connected by conductive glue; The high conductive layer is one of aluminum, copper and silver, and the high magnetic permeability layer is a Permalloy layer or a ceramic particle layer; The inner and outer sides of the shielding layer are respectively provided with inner and outer parts; One of the high conductive layers of the shielding layer is arranged in a staggered layer with the high magnetic permeability layer.

2. The electromagnetic shielding structure for special vehicles according to claim 1, characterized in that: The highly conductive layer is at least one of a plate, a cloth, a film, and a mesh structure.

3. The electromagnetic shielding structure for special vehicles according to claim 1, characterized in that: The high magnetic permeability layer is at least one of a plate, cloth, film, and mesh structure.

4. The electromagnetic shielding structure for special vehicles according to claim 1, characterized in that: The conductive adhesive is epoxy copper powder adhesive.

5. The electromagnetic shielding structure for special vehicles according to claim 1, characterized in that: The shielding layer forms an overlapping structure with the inner component and the outer component, forming a uniform structural surface for the flow of current and avoiding the formation of a potential difference between two metals connected to each other.

6. Special vehicle electromagnetic shielding system, characterized in that: It comprises an inner pasting layer formed by any one of the special vehicle electromagnetic shielding structures of claims 1-5, and the inner pasting layer is pasted inside the box of the special vehicle; The special vehicle box is provided with a power port opening, and an electromagnetic pulse protection device is provided at the power port opening, and the electromagnetic pulse protection device is installed in a through-wall manner; the electromagnetic pulse protection device includes an energy discharge part and a filtering part, and the energy discharge part is connected to the filtering part; the energy discharge part includes a primary energy discharge unit, a decoupling unit, and a secondary energy discharge unit connected in sequence, the primary energy discharge unit adopts an overvoltage protection device, and the decoupling unit adopts a magnetic ring wire-wound inductor; the secondary energy discharge unit adopts a bidirectional voltage regulator diode.

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