Universal protection device

Abstract

The utility model discloses a universal protection device, belongs to the technical field of protection devices, and solves the problem that a tested product and accompanying test equipment are easily interfered in a cross-linking test process due to lack of a protection device in the prior art. The device comprises an electromagnetic shielding case, at least one array plate is arranged in the electromagnetic shielding case, and a plurality of filters or a plurality of TVS devices are arranged on each array plate in an array mode; the electromagnetic shielding case is provided with a first butt joint socket and a second butt joint socket which are electrically connected with each array plate. According to the utility model, the electromagnetic shielding box can shield electromagnetic radiation interference, improve the filtering effect, have good conductive performance and improve the lightning suppression effect, the filter on the array plate can fully filter the electromagnetic interference, and the TVS device on the array plate can fully suppress the interference in the lightning indirect effect test, so that the reliability of the device is improved. And the anti-interference capability and the stability in the cross-linking test of the tested product and the accompanying test equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of protection devices, and particularly relates to a general protection device. Background Art

[0002] In the process of developing avionics products, both electromagnetic compatibility tests and indirect lightning effect tests are important inspection items. In these tests, sometimes the measured data indicators of the accompanying test equipment exceed the standard or the equipment is damaged. This is mainly due to the insufficient electromagnetic compatibility or indirect lightning protection ability of the accompanying test equipment itself.

[0003] Specifically, in electromagnetic compatibility tests, if the anti-electromagnetic interference performance of the accompanying test equipment is poor, it may be affected or even damaged by electrical interference; in indirect lightning effect tests, if the accompanying test equipment lacks sufficient lightning protection ability, it will also be interfered with or damaged.

[0004] Therefore, in order to ensure the accuracy of test results and truly reflect the performance of the electronic products under test, it is necessary to enhance the electromagnetic compatibility or lightning protection ability of the accompanying test equipment, so as to effectively eliminate the interference in the test process. Content of the Utility Model

[0005] Aiming at the above problems in the prior art, the utility model provides a general protection device, which solves the problem that the test product and the accompanying test equipment are easily interfered during the cross-linking test due to the lack of a protection device in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A general protection device is provided, which includes an electromagnetic shielding chassis. At least one array board is arranged inside the electromagnetic shielding chassis, and a plurality of filters or a plurality of TVS devices are arranged in an array on each array board; a first docking socket and a second docking socket electrically connected to the plurality of filters or the plurality of TVS devices are arranged on the electromagnetic shielding chassis, and the first docking socket and the second docking socket are respectively used for electrically connecting to the accompanying test equipment and the product under test.

[0008] The working principle of this solution is as follows: The first docking socket and the second docking socket are respectively connected to the cable connection ends of the product under test and the accompanying test equipment. In the electromagnetic compatibility test, the electromagnetic shielding box can shield electromagnetic radiation interference and improve the filtering effect. Multiple filters provided on the array board fully filter the cable signals between the product under test and the accompanying test equipment to reduce or eliminate the impact or damage caused by electromagnetic interference to the accompanying test equipment. In the indirect lightning effect test, the TVS devices on the array board suppress the indirect lightning effect interference of the cable signals between the electronic device under test and the accompanying test equipment to reduce or eliminate the impact or damage caused by the indirect lightning effect test to the accompanying test equipment. Moreover, the electromagnetic shielding box has good electrical conductivity and can effectively achieve good lap joint with the positive pole of the TVS device, guiding the lightning interference to the ground, thereby improving the lightning suppression effect.

[0009] Furthermore, the electromagnetic shielding chassis is in the shape of a cuboid with a hollow interior, and four side plates are connected or disassembled to the electromagnetic shielding chassis by bolts. By adopting the detachable side plate design, the electromagnetic shielding chassis is convenient for maintenance and repair. At the same time, it is also convenient to replace the internal array board, improving the flexibility and maintenance efficiency of the equipment.

[0010] Furthermore, multiple fixed ribs are respectively and oppositely arranged on the inner top plate and the inner bottom plate of the electromagnetic shielding chassis. Each two oppositely arranged fixed ribs on the upper and lower sides are respectively connected to the upper and lower sides of the array board by screws. The design of the fixed ribs enables the array board to be stably installed in the electromagnetic shielding chassis, enhancing the stability of the array board.

[0011] Furthermore, through holes are respectively opened in the middle parts of the left side plate and the right side plate of the electromagnetic shielding chassis, and the first docking socket and the second docking socket are respectively fixed at the through holes of the left side plate and the right side plate. By setting through holes on the left side plate and the right side plate and fixing the docking sockets there, the convenience and reliability of cable connection can be ensured. At the same time, the exposure to external electromagnetic interference is reduced, and the overall shielding effect is improved.

[0012] Furthermore, the first docking socket and the second docking socket are provided with square bases, and the two bases are respectively fixed to the left side plate and the right side plate by bolts. The design of the square base in combination with the bolt fixing method makes the docking socket more firmly installed and not easily loosened, ensuring the stability and safety of the connection.

[0013] Furthermore, each array board includes an aluminum plate, and multiple filters or multiple TVS devices are respectively connected to the aluminum plate by bolts. The aluminum plate not only provides good support but also, as a good conductor, can effectively connect the grounding ends of the filters or TVS devices to the grounding system of the chassis, improving the shielding effect and anti-interference ability.

[0014] Further, the filter is a feedthrough filter or a feedthrough capacitor. Using a feedthrough filter or a feedthrough capacitor as the filter can effectively filter out high-frequency noise, ensure the purity of the signal, and at the same time reduce the impact of electromagnetic interference on the system.

[0015] Further, the material of the electromagnetic shielding chassis is metal, and the electromagnetic shielding chassis is grounded. The material of the electromagnetic shielding chassis can be aluminum, copper or iron, which has good shielding performance and can effectively block external electromagnetic interference; the grounding setting further enhances the protection ability against transient impacts such as lightning, ensuring the safe operation of the equipment.

[0016] The present utility model discloses a general protection device, and its beneficial effects are as follows:

[0017] The electromagnetic shielding box in the present utility model can shield electromagnetic radiation interference, improve the filtering effect, and at the same time has good electrical conductivity to improve the lightning suppression effect. The filter on the array board can fully filter electromagnetic interference, and the TVS device on the array board can fully suppress the interference in the indirect lightning effect test, improving the anti-interference ability and stability in the cross-linking test between the product under test and the accompanying test equipment. Description of the Drawings

[0018] Figure 1 is an exploded view of the general protection device;

[0019] Figure 2 is a structural schematic diagram of the filter;

[0020] Figure 3 is a structural schematic diagram of the chassis;

[0021] Figure 4 is a structural schematic diagram of the TVS device;

[0022] Figure 5 is an electrical connection schematic diagram of the electromagnetic compatibility test;

[0023] Figure 6 is an electrical connection schematic diagram of the indirect lightning effect test;

[0024] Wherein: 1. First docking socket; 2. Left side plate; 3. Chassis; 4. Rear side plate; 5. Second docking socket; 6. Right side plate; 7. Array board; 71. Aluminum plate; 72. Filter; 73. TVS device; 8. Front side plate. Detailed Embodiments

[0025] The following describes the specific embodiments of the present utility model to facilitate those skilled in the art of this technology to understand the present utility model. However, it should be clear that the present utility model is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of this technology, as long as various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, these changes are obvious, and all utility models created using the concept of the present utility model are within the scope of protection.

[0026] Embodiment 1

[0027] This embodiment provides a general protection device, which is used in electromagnetic compatibility tests to fully filter the cable signals between the electronic device under test and the accompanying test device, so as to reduce or eliminate the influence or damage of electromagnetic interference on the accompanying test device. The following introduces its specific structure.

[0028] Refer to Figure 1 、 Figure 2 and Figure 3 , a general protection device includes an electromagnetic shielding chassis 3. The material of the electromagnetic shielding chassis 3 is metal, and the electromagnetic shielding chassis 3 is grounded. The material of the electromagnetic shielding chassis 3 can be aluminum, copper or iron, which has good shielding performance and can effectively block external electromagnetic interference; the grounding setting further enhances the protection ability against transient impacts such as lightning, ensuring the safe operation of the device.

[0029] Refer to Figure 2 , at least one array board 7 is arranged inside the electromagnetic shielding chassis 3, and a plurality of filters 72 are arranged in an array on each array board 7. Each array board 7 is an aluminum board 71, and the plurality of filters 72 are bolted to the aluminum board 71.

[0030] In this embodiment, the filter 72 is a feedthrough filter or a feedthrough capacitor, and the withstand voltage value is selected according to the signal requirements. Using a feedthrough filter or a feedthrough capacitor as the filter 72 can effectively filter out high-frequency noise, ensure the purity of the signal, and at the same time reduce the influence of electromagnetic interference on the system. The aluminum board 71 serves as the chassis ground of the filter circuit, and the array board 7 can be set to one, two or more according to the complexity and quantity relationship of the cable signals of the product under test.

[0031] A first docking socket 1 and a second docking socket 5 electrically connected to the filters 72 on each array board 7 are arranged on the electromagnetic shielding chassis 3. The first docking socket 1 and the second docking socket 5 are respectively used for electrically connecting to the accompanying test device and the device under test.

[0032] As the specific structure of the electromagnetic shielding chassis 3, the electromagnetic shielding chassis 3 is in the shape of a cuboid with a hollow interior, and four detachable side plates are connected to the electromagnetic shielding chassis 3. By adopting the detachable side plate design, the electromagnetic shielding chassis 3 is convenient for maintenance and repair, and at the same time, it is also convenient to replace the internal array board 7, improving the flexibility and maintenance efficiency of the equipment.

[0033] The four side plates are respectively a left side plate 2, a right side plate 6, a front side plate 8 and a rear side plate 4. Through holes are respectively opened in the middle parts of the left side plate 2 and the right side plate 6, and the first docking socket 1 and the second docking socket 5 are respectively fixed at the through holes of the left side plate 2 and the right side plate 6. By setting through holes on the left side plate 2 and the right side plate 6 and fixing the docking sockets here, the convenience and reliability of cable connection can be ensured, and at the same time, the exposure to external electromagnetic interference is reduced, improving the overall shielding effect.

[0034] In order to facilitate the fixing of the first docking socket 1 and the second docking socket 5, square bases are provided on the first docking socket 1 and the second docking socket 5, and the two bases are respectively bolted to the left side plate 2 and the right side plate 6. The design of the square base combined with the bolt fixing method makes the docking socket more firmly installed and not easy to loosen, ensuring the stability and safety of the connection.

[0035] In order to enhance the fixing stability of the array board 7, multiple fixing ribs are respectively oppositely arranged on the inner top plate and the inner bottom plate of the electromagnetic shielding chassis 3, and each two oppositely arranged upper and lower fixing ribs are respectively connected to the upper and lower sides of the array board 7 with screws.

[0036] The working principle of this embodiment is as follows:

[0037] In the test configuration carried out according to the requirements of the laboratory electromagnetic compatibility test standard, a general protection device is connected in series at the cable connection end between the product under test and the accompanying test equipment, and the first docking socket 1 and the second docking socket 5 are respectively connected to the cable connection ends of the product under test and the accompanying test equipment. Refer to Figure 5 , where EUT (Equipment Under Test) is the product under test.

[0038] Through the filter 72 on the internal array board 7, the cable signals between the electronic device under test and the accompanying test equipment are fully filtered to reduce or eliminate the influence or damage caused by electromagnetic interference to the accompanying test equipment. The electromagnetic shielding chassis 3 can shield the external and internal electromagnetic radiation interference of the chassis 3, and the electromagnetic shielding chassis 3 has good electrical conductivity, and can effectively achieve good lap joint with the shell ground of the filter 72, guiding the electromagnetic interference to the ground, thereby improving the filtering effect.

[0039] Embodiment 2

[0040] Refer to Figure 1 、Figure 3 And Figure 4 , this embodiment makes further limitations on the basis of Embodiment 1. The specific improvement lies in replacing the filter 72 on the array board 7 with a TVS device 73 (Transient Voltage Suppressor) for the indirect lightning effect test. For other parts not mentioned, refer to Embodiment 1 or the prior art.

[0041] The positive electrode of each TVS device 73 is connected to the chassis ground, and the negative electrode is led out by two wires respectively. One wire is connected to the first docking socket 1 of the left side plate 2, and the other wire is connected to the second docking socket 5 of the right side plate 6 to absorb the indirect lightning effect interference signal of the connected cable signal. The TVS device 73 on the array board 7 suppresses the indirect lightning effect interference of the cable signal between the DUT (Device Under Test) and the companion test equipment to reduce or eliminate the impact or damage to the companion test equipment caused by the indirect lightning effect test.

[0042] The working principle of this embodiment is as follows:

[0043] In the test configuration carried out according to the laboratory standard requirements, a general protection device is connected in series at the cable connection end between the DUT and the companion test equipment. This device is placed beside the companion test equipment. Refer to Figure 6 .

[0044] The TVS device 73 on the array board 7 suppresses the indirect lightning effect interference of the cable signal between the DUT and the companion test equipment to reduce or eliminate the impact or damage to the companion test equipment caused by the indirect lightning effect test. The electromagnetic shielding box has good electrical conductivity and can effectively achieve good lap joint with the positive electrode of the TVS device 73 to guide the lightning interference to the ground, thereby improving the lightning suppression effect.

[0045] Although the specific implementation manners of the utility model have been described in detail with reference to the accompanying drawings, it should not be construed as a limitation on the protection scope of this patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative efforts still fall within the protection scope of this patent.

Claims

1. A general protection device, characterized in that, It includes an electromagnetic shielding chassis (3), and at least one array board (7) is arranged inside the electromagnetic shielding chassis (3). A plurality of filters (72) or a plurality of TVS devices (73) are arranged in an array on each array board (7); A first docking socket (1) and a second docking socket (5) electrically connected to the plurality of filters (72) or the plurality of TVS devices (73) are arranged on the electromagnetic shielding chassis (3). The first docking socket (1) and the second docking socket (5) are respectively used for electrically connecting to the accompanying test equipment and the product under test.

2. The general protection device according to claim 1, characterized in that, The electromagnetic shielding chassis (3) has a rectangular parallelepiped structure with a hollow interior, and four side plates are connected or disassembled to the electromagnetic shielding chassis (3) by bolts.

3. The general protection device according to claim 2, characterized in that, A plurality of fixed ribs are respectively oppositely arranged on the inner top plate and the inner bottom plate of the electromagnetic shielding chassis (3). Each two oppositely arranged fixed ribs up and down are respectively connected to the upper and lower sides of the array board (7) by screws.

4. The general protection device according to claim 2, characterized in that, Through holes are respectively formed in the middle parts of the left side plate (2) and the right side plate (6) of the electromagnetic shielding chassis (3), and the first docking socket (1) and the second docking socket (5) are respectively fixed at the through holes of the left side plate (2) and the right side plate (6).

5. The general protection device according to claim 4, characterized in that Square bases are arranged on the first docking socket (1) and the second docking socket (5), and the two bases are respectively fixed on the left side plate (2) and the right side plate (6) by bolts.

6. The general protection device according to claim 1, characterized in that, Each array board (7) includes an aluminum plate (71), and the plurality of filters (72) or the plurality of TVS devices (73) are respectively connected to the aluminum plate (71) by bolts.

7. The general protection device according to claim 6, characterized in that, The filter (72) is a feedthrough filter or a feedthrough capacitor.

8. The general protection device according to claim 1, characterized in that, The material of the electromagnetic shielding chassis (3) is metal, and the electromagnetic shielding chassis (3) is grounded.

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