Double-layer electromagnetic compatibility shielding chamber

Abstract

A double-layer electromagnetic compatibility shielding chamber of the utility model comprises an outer layer shielding body, an inner layer shielding body, a first shielding door, a second shielding door, a test antenna and a test platform, the inner layer shielding body is arranged in the outer layer shielding body, the side surface of the outer layer shielding body is provided with the first shielding door, and the side surface of the inner layer shielding body is provided with the second shielding door. The side face, provided with the first shielding door, of the outer-layer shielding body and the side face, provided with the second shielding door, of the inner-layer shielding body are not located on the same corresponding side face. The test antenna is arranged in the inner shielding body and is used for receiving and transmitting a test electromagnetic wave signal; the test platform is arranged in the inner-layer shielding body, and the test platform is used for placing tested equipment; a first composite wave-absorbing material is hung on the inner wall and the top surface of the outer-layer shielding body, a second composite wave-absorbing material is hung on the inner wall and the top of the inner-layer shielding body, and a movable composite wave-absorbing material is laid on the bottom surface of the inner-layer shielding body.

Description

TECHNICAL FIELD

[0001] The utility model relates to deep space exploration load electromagnetic compatibility test technical field, specifically a double -deck electromagnetic compatibility shielded room. BACKGROUND

[0002] In deep space exploration mission, the electromagnetic compatibility of equipment has very high requirement. The background noise level of the existing EMI laboratory in the key working frequency range (such as 100kHz to 200MHz) is higher, which cannot satisfy the strict requirement of deep space exploration mission on equipment EMI interference. Specifically, the background noise of the existing laboratory is in the range of-6dBuV / m / Hz (100kHz) to-36dBuV / m / Hz (200MHz), while the deep space exploration mission requires that the equipment EMI interference cannot be greater than-50dBuV / m / Hz, and even needs to reach lower-56dBuV / m / Hz to satisfy the requirement that the background noise is lower than the limit value 6dB specified in GJB151B. Therefore, a laboratory with higher shielding effectiveness needs to be constructed for testing.

[0003] With the increasing complexity of electromagnetic environment and the increasing integration and complexity of electronic equipment, the shielding performance requirement of shielding body is also higher and higher. The existing single-layer shielding structure cannot satisfy the shielding requirement in some specific cases, especially in deep space exploration scientific load electromagnetic compatibility test which requires extremely high shielding effectiveness.

[0004] Therefore, it is particularly important to develop a double-layer electromagnetic compatibility shielded room with higher shielding effectiveness. UTILITY MODEL CONTENT

[0005] In order to make up for the deficiency of the prior art, the utility model provides a double-layer electromagnetic compatibility shielded room.

[0006] The utility model discloses a double-layer electromagnetic compatibility shielded room, including outer shielding body, inner shielding body, first shielding door, second shielding door, test antenna and test platform, the inner shielding body is located in the inside of outer shielding body, the side surface of outer shielding body is set up first shielding door, the side surface of inner shielding body is set up second shielding door, the side surface of outer shielding body set up first shielding door and the side surface of inner shielding body set up second shielding door are not in the same corresponding same side surface;Test antenna is set up in the inside of inner shielding body, and test antenna is used to receive and emit test electromagnetic wave signal;Test platform is set up in the inside of inner shielding body, and test platform is used to place the equipment under test;The inner wall and top surface of outer shielding body hang and install first composite wave absorbing material, the inner wall and top of inner shielding body hang and install second composite wave absorbing material, and the bottom of inner shielding body is paved with mobile composite wave absorbing material.

[0007] Preferably, the first, second and mobile composite wave-absorbing materials are all in the shape of a wedge outwardly.

[0008] Preferably, the outer shielding body is made of steel plates spliced or welded together around the periphery, top and bottom.

[0009] Preferably, the inner shielding body is made of steel plates spliced or welded together around the periphery, top and bottom.

[0010] Preferably, the outer shielding body is made of steel plates with a thickness of 1-3 mm; and the inner shielding body is made of steel plates with a thickness of 1-3 mm.

[0011] Preferably, the outer shielding body is made of steel plates with a thickness of 2 mm; and the inner shielding body is made of steel plates with a thickness of 2 mm.

[0012] Preferably, the first and second shielding doors are both double-blade four-spring shielding doors, the door frames of the first and second shielding doors are both four-spring plates, and the first and second shielding doors are both in the double-blade form.

[0013] Preferably, the outer shielding body and the inner shielding body are both in the shape of a cuboid.

[0014] Preferably, the first composite wave-absorbing material is hung on the inner wall and top surface of the outer shielding body by screws.

[0015] Preferably, the second composite wave-absorbing material is hung on the inner wall and top surface of the inner shielding body by screws, and the mobile composite wave-absorbing material is movable on the bottom surface of the inner shielding body.

[0016] The utility model discloses the beneficial effect lies in:

[0017] 1. The utility model discloses a double -deck electromagnetic compatibility shielding room structure through adopting double -deck shielding design, can improve shielding effectiveness significantly. This design can effectively block the interference of external electromagnetic wave, reduces the outside leakage of internal electromagnetic wave simultaneously, thereby ensuring the pure and stable of laboratory internal electromagnetic environment. The improvement of this shielding effectiveness is crucial to carry out high -precision electromagnetic compatibility test, satisfies the deep space exploration load electromagnetic compatibility test demand;

[0018] 2. The utility model discloses a double -deck electromagnetic compatibility shielding room structure double -deck structure's design not only improves shielding effectiveness, still strengthens the overall structural stability of laboratory. Through adopting the first shielding door and the second shielding door misplacement installation, makes double -deck shielding body can better bear external pressure and vibration, ensures the safety and stability of laboratory in the long -term use process;

[0019] 3.The double-layer electromagnetic compatibility shielding room structure has strong adaptability and can be applied to different types of electromagnetic compatibility test scenes. Whether it is a vehicle-level electromagnetic compatibility test or a component-level electromagnetic compatibility test, the double-layer structure can provide a test environment that meets the requirements;

[0020] 4, the utility model discloses a double-layer electromagnetic compatibility shielding room structure, the inner wall and top surface of outer shielding body hang the first composite wave -absorbing material, the inner wall and top of inner shielding body hang the second composite wave -absorbing material, the bottom surface of inner shielding body is paved with mobile composite wave -absorbing material, shielding body inside except bottom surface, outer shielding body five faces hang composite wave -absorbing material, the five faces of inner shielding body hang composite wave -absorbing material and pave mobile composite wave -absorbing material in a face, guarantee that shielding room has good wave -absorbing effect in full frequency band. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.

[0022] Figure 1 It is a structure diagram of a double-layer electromagnetic compatibility shielding room.

[0023] In the drawing: 101, outer shielding body; 102, inner shielding body; 103, first shielding door; 104, second shielding door; 105, test antenna; 106, test platform; 201, first composite wave -absorbing material; 202, second composite wave -absorbing material; 301, mobile composite wave -absorbing material. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0025] Embodiment 1

[0026] Please refer to Figure 1As shown, a double-layer electromagnetic compatibility shielding room comprises an outer shielding body 101, an inner shielding body 102, a first shielding door 103, a second shielding door 104, a test antenna 105 and a test platform 106, the inner shielding body 102 is located inside the outer shielding body 101, the first shielding door 103 is arranged on the side of the outer shielding body 101, the second shielding door 104 is arranged on the side of the inner shielding body 102, the side of the outer shielding body 101 where the first shielding door 103 is arranged is not the same side as the side of the inner shielding body 102 where the second shielding door 104 is arranged; the test antenna 105 is arranged inside the inner shielding body 102, and is used for receiving and transmitting test electromagnetic wave signals; the test platform 106 is arranged inside the inner shielding body 102, and is used for placing a device under test; a first composite wave-absorbing material 201 is hung on the inner wall and top surface of the outer shielding body 101, a second composite wave-absorbing material 202 is hung on the inner wall and top of the inner shielding body 102, and a movable composite wave-absorbing material 301 is laid on the bottom surface of the inner shielding body 102.

[0027] The first shielding door and the second shielding door are arranged at positions staggered with each other, and are not arranged on the same side of the shielding body, so that higher shielding effectiveness is ensured.

[0028] The movable composite wave-absorbing material is laid on the bottom surface of the inner shielding body, so as to facilitate personnel and equipment to pass through.

[0029] The shielding door is arranged on the shielding body, and is used for equipment transportation and personnel passing through.

[0030] The first composite wave-absorbing material 201 and the second composite wave-absorbing material 202 are both combinations of ferrite magnetic sheets and sharp-pyramid-shaped sponge wave-absorbing materials, and are hung on the shielding body through special screws; the movable composite wave-absorbing material is only the sharp-pyramid-shaped sponge wave-absorbing material, and can be directly laid on the ground and removed when not in use.

[0031] Embodiment 2

[0032] Preferably, the first composite wave-absorbing material 201, the second composite wave-absorbing material 202 and the movable composite wave-absorbing material 301 are all in the shape of sharp pyramids facing outward.

[0033] The composite wave-absorbing material and the movable wave-absorbing material are both in the shape of sharp pyramids facing outward, and can achieve good wave-absorbing performance in the whole frequency band.

[0034] Preferably, the outer shielding body 101 is formed by splicing or welding steel plates around the periphery, the top and the bottom.

[0035] Preferably, the inner shielding body 102 is formed by splicing or welding steel plates around the periphery, the top and the bottom.

[0036] Preferably, the steel plate thickness of the outer shielding body 101 is 2mm; the steel plate thickness of the inner shielding body 102 is 2mm.

[0037] The outer shielding body is composed of 2mm steel plates which are spliced or welded after special electroplating treatment to form a conductive continuous shielding body.

[0038] The inner shielding body is composed of 2mm steel plates which are spliced or welded after special electroplating treatment to form a conductive continuous shielding body.

[0039] The whole shielding body is electrically continuous and has no gap leakage point.

[0040] Preferably, the first shielding door 103 and the second shielding door 104 are both double-blade four-spring shielding doors, the door frame of the first shielding door 103 and the second shielding door 104 is provided with four spring leaves, and the first shielding door 103 and the second shielding door 104 are both double-blade forms. The first shielding door 103 and the second shielding door 104 ensure the shielding effectiveness when the door is closed.

[0041] Preferably, the outer shielding body 101 and the inner shielding body 102 are both cuboids.

[0042] The first composite wave-absorbing material 201 is hung on the inner wall and top surface of the outer shielding body 101 through screws.

[0043] The second composite wave-absorbing material 202 is hung on the inner wall and top surface of the inner shielding body 102 through screws, and the movable composite wave-absorbing material 301 is movable on the bottom surface of the inner shielding body 102.

[0044] After the construction of the two-layer shielding body is completed, the darkroom bottom noise reaches-56dBuV / m / Hz, and the deep space exploration load can be placed on the test platform of the inner shielding body, and the test is carried out using the test antenna. In engineering practice, the double-layer shielding structure has higher shielding performance than the single-layer shielding structure, and the application space will be more extensive.

[0045] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A double-layer electromagnetic compatibility shielded room, characterized in that: The test includes an outer shield (101), an inner shield (102), a first shielding door (103), a second shielding door (104), a test antenna (105), and a test platform (106). The inner shield (102) is located inside the outer shield (101). The first shielding door (103) is opened on the side of the outer shield (101), and the second shielding door (104) is opened on the side of the inner shield (102). The side of the outer shield (101) with the first shielding door (103) is not the same as the side of the inner shield (102) with the second shielding door (104). On the same corresponding side; the test antenna (105) is set inside the inner shield (102), and the test antenna (105) is used to receive and transmit test electromagnetic wave signals; the test platform (106) is set inside the inner shield (102), and the test platform (106) is used to place the device under test; the inner wall and top surface of the outer shield (101) are hung with the first composite wave absorbing material (201), the inner wall and top surface of the inner shield (102) are hung with the second composite wave absorbing material (202), and the bottom surface of the inner shield (102) is covered with movable composite wave absorbing material (301).

2. The double-layer electromagnetic compatibility shielding room according to claim 1, characterized in that, The first composite absorbing material (201), the second composite absorbing material (202), and the movable composite absorbing material (301) are all wedge-shaped with an outward orientation.

3. The double-layer electromagnetic compatibility shielding room according to claim 1, characterized in that, The outer shield (101) is made of steel plates spliced ​​or welded on all four sides, top and bottom.

4. A double-layer electromagnetic compatibility shielded room according to claim 1, characterized in that, The inner shield (102) is made of steel plates spliced ​​or welded on all four sides, top and bottom.

5. A double-layer electromagnetic compatibility shielded room according to claim 1, characterized in that, The outer shield (101) has a steel plate thickness of 1mm-3mm; the inner shield (102) has a steel plate thickness of 1mm-3mm.

6. A double-layer electromagnetic compatibility shielded room according to claim 1, characterized in that, The outer shield (101) has a steel plate thickness of 2mm; the inner shield (102) has a steel plate thickness of 2mm.

7. A double-layer electromagnetic compatibility shielded room according to claim 1, characterized in that, The first shielding door (103) and the second shielding door (104) are both double-blade four-spring shielding doors. The door frames of the first shielding door (103) and the second shielding door (104) are both made of four springs. The first shielding door (103) and the second shielding door (104) are both made of double blades.

8. A double-layer electromagnetic compatibility shielded room according to claim 1, characterized in that, Both the outer shield (101) and the inner shield (102) are rectangular parallelepipeds.

9. A double-layer electromagnetic compatibility shielded room according to claim 1, characterized in that, The first composite absorbing material (201) is attached to the inner wall and top surface of the outer shield (101) by screws.

10. A double-layer electromagnetic compatibility shielded room according to claim 1, characterized in that, The second composite absorbing material (202) is attached to the inner wall and top surface of the inner shield (102) by screws, and the movable composite absorbing material (301) is movable on the bottom surface of the inner shield (102).

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