Self-powered LRM server module electromagnetic compatibility device and implementation method

Abstract

The invention relates to the field of server electromagnetic compatibility, and particularly provides a self-powered LRM server module electromagnetic compatibility device, which comprises a case and a functional module, the functional module is inserted into the case, the case is connected with the functional module through an LRM connector, and a power supply cavity and a signal cavity on the LRM connector are respectively connected with corresponding connectors on the case; the LRM connector comprises a lower shell and an upper shell, and flanges on the upper shell and the lower shell tightly press the conductive elastic material installed on the case to form a connector portion double-layer shielding structure. Compared with the prior art, the electromagnetic compatibility of the self-powered LRM server module can be improved, the signal radiation risk of the self-powered LRM server module is reduced, the requirements for environmental adaptability and electromagnetic compatibility are met, the structure is simple, and the performance is reliable.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic compatibility of servers, and specifically provides a self-powered LRM server module electromagnetic compatibility device and an implementation method. Background Art

[0002] The reinforced modular server based on LRM architecture has the characteristics of high reliability, rapid selection and field replaceability while meeting the requirements of big data processing. It can be used as the information processing center for field combat command, which is in line with the development trend of modularization, busization and standardization of military electronic information systems, and its application is gradually increasing. However, the open or framed rack form of LRM architecture servers and the mutual coupling of power supply and signal inside the self-powered LRM server module bring great challenges to electromagnetic compatibility.

[0003] Invention patent CN202211144190.5 is an open LRM integrated installation box. As a reinforced modular server chassis, it has the characteristics of modules that can be removed individually for easy maintenance. However, its electromagnetic compatibility design only mentions that the LRM module and backplane assembly each have independent electromagnetic compatibility and sealing, but does not explain how to achieve it.

[0004] How to solve the electromagnetic compatibility problem of the self-powered LRM architecture reinforced server module is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] The present invention aims at the above-mentioned deficiencies of the prior art and provides a self-powered LRM server module electromagnetic compatibility device with strong practicality.

[0006] A further technical task of the present invention is to provide a method for realizing electromagnetic compatibility of a self-powered LRM server module that is reasonably designed, safe and applicable.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] A self-powered LRM server module electromagnetic compatibility device, comprising a chassis and a functional module, wherein the functional module is inserted into the chassis, the chassis and the functional module are connected via an LRM connector, and a power cavity and a signal cavity on the LRM connector are respectively connected to corresponding connectors on the chassis;

[0009] The LRM connector includes a lower shell and an upper shell. The flanges on the upper shell and the lower shell press the conductive elastic material installed on the chassis to form a double-layer shielding structure at the connector part.

[0010] Furthermore, an inlay fitting structure is adopted between the upper shell and the lower shell, a groove is designed on the contact surface, a conductive elastic material is installed, the upper shell and the lower shell are locked by screws, and the conductive elastic material is pressed together to achieve shielding and sealing between the upper shell and the lower shell.

[0011] Furthermore, a circuit board is provided inside the upper shell, a strong radiation device is provided on the circuit board, and a copper-clad area is provided around the strong radiation device.

[0012] Furthermore, metallized holes and vias are designed at certain intervals on the copper clad area, and the grid-arranged metallized holes and vias are connected to the ground layer on the circuit board. A metal shielding cover is provided on the upper part of the ground layer, and the metal shielding cover is provided with mounting pins, which are fixed to the circuit board through the mounting pins. Finally, the metal shielding cover is welded to the circuit board using the SMT process, and the metal shielding cover is conductively connected to the upper shell nearby.

[0013] Furthermore, the power cavity and the signal cavity are in a shielded and isolated state, and the contact gaps between the upper shell, the lower shell and the LRM connector are filled with conductive elastic material to ensure conductive continuity.

[0014] Furthermore, shielding cavities are designed in the upper shell and the lower shell at the power supply input part of the corresponding circuit board, and a copper-clad area is provided on the contact surface of the circuit board with the shielding cavity.

[0015] Furthermore, the copper clad area is a ring surrounding the power supply input part, the upper and lower copper clad areas of the circuit board correspond to each other, and are connected by vias, and a filter device is arranged at the position of the shielding cavity. The external connection line passes through the filter device to filter out high-frequency noise signals on the signal, thereby minimizing the conduction and spatial coupling between the power supply and the signal.

[0016] A self-powered LRM server module electromagnetic compatibility method, after the LRM connector is powered on, the circuit board works, the radiation signal of the internal strong radiation device is attenuated at the metal shielding cover for the first time, and the leaked signal is attenuated at the upper shell and lower shell of the module for the second time, forming a double-layer shielding structure for the internal strong radiation device to reduce the radiation signal strength;

[0017] The power supply part isolates the internal radiation signal through the power input shielding cavity to avoid spatial signal coupling; at the same time, the filter components installed on the power input shielding cavity are used to filter out the high-frequency clutter signals on the connection line and reduce the strength of useless conducted signals.

[0018] Compared with the prior art, the electromagnetic compatibility device and implementation method of the self-powered LRM server module of the present invention has the following outstanding beneficial effects:

[0019] The present invention can improve the electromagnetic compatibility of the self-powered LRM server module, reduce the signal radiation risk of the self-powered LRM server module, meet the requirements of environmental adaptability and electromagnetic compatibility, and has a simple structure and reliable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Attached Figure 1 It is a structural schematic diagram of an electromagnetic compatibility device of a self-powered LRM server module;

[0022] Attached Figure 2 For attachment Figure 1 The structural diagram at I in the middle;

[0023] Attached Figure 3 For attachment Figure 2 The structural diagram at B in the middle;

[0024] Attached Figure 4 For attachment Figure 1 The structural diagram at A in the middle;

[0025] Attached Figure 5 For attachment Figure 4 Schematic diagram of the internal structure.

[0026] The symbols in the accompanying drawings represent:

[0027] 1. Upper shell, 2. Lower shell, 3. Circuit board, 4. Power supply input part, 5. Shielding compartment, 6. Copper clad area, 7. Via, 8. Filter component, 9. External connection, 10. LRM connector, 11. Power cavity, 12. Signal cavity, 13. Conductive elastic material, 14. Flange, 15. Strong radiation device, 16. Metallized hole, 17. Ground layer, 18. Metal shielding cover, 19. Pin, 20. Groove, 21. Screw, 22. Chassis, 23. Functional module. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] A best embodiment is given below:

[0030] like Figure 1 , 5 As shown, a self-powered LRM module server electromagnetic compatibility device in this embodiment includes a chassis 22, a functional module 23, the functional module 23 is inserted into the chassis 22, the LRM connector 10 is inserted into the chassis 22, and the power cavity 11 and the signal cavity 12 on the LRM connector 10 are respectively connected to the corresponding connectors on the chassis 22;

[0031] The functional module 23 includes an LRM connector 10, a lower shell 2 and an upper shell 1. The flanges 14 on the upper shell 1 and the lower shell 2 press the conductive elastic material 13 installed on the chassis 22 to form a double-layer shielding structure at the connector part.

[0032] like Figure 2 As shown, an inlay fitting structure is adopted between the upper shell 1 and the lower shell 2, and a groove 20 is designed on the contact surface, and the conductive elastic material 13 is installed. The upper shell 1 and the lower shell 2 are locked by screws 21, and the conductive elastic material 13 is pressed together to achieve shielding and sealing between the upper shell 1 and the lower shell 2.

[0033] like Figure 3 As shown, a circuit board 3 is provided inside the upper shell 1, a strong radiation device 15 is provided on the circuit board 3, and a copper-clad area 6 is provided around the strong radiation device 15. Metallized holes 16 and vias 7 are designed at certain intervals on the copper-clad area 6, and the metallized holes 16 and vias 7 arranged in a grid are connected to the ground layer 17 on the circuit board 3. A metal shielding cover 18 is provided on the upper part of the ground layer 17, and the metal shielding cover 18 is provided with mounting pins 19, and is fixed on the circuit board 3 through the mounting pins 19. Finally, the metal shielding cover 18 is welded on the circuit board 3 by using the SMT process, and the metal shielding cover 18 is conductively connected to the upper shell 1 nearby.

[0034] The metal shielding cover 18 , the copper-clad area 6 , the metallized hole 16 , the via 7 and the ground layer 17 form a shield for the strong radiation device 15 on the circuit board 3 .

[0035] like Figure 4 As shown, the power cavity 11 and the signal cavity 12 are in a shielded isolation state, and the gaps between the upper shell 1, the lower shell 2 and the LRM connector 10 are filled with conductive elastic material 13 to ensure conductive continuity. The upper shell 1 and the lower shell 2 are provided with flanges 14, and the flange 14 structure surrounds the LRM connector 10.

[0036] like Figure 5 As shown, both the upper shell 1 and the lower shell 2 are designed with a shielding cavity 5 at the power supply input part 4 of the corresponding circuit board 3, and a copper-clad area 6 is provided on the contact surface of the circuit board 3 with the shielding cavity 5.

[0037] The copper clad area 6 is annularly surrounding the power supply input part 4. The upper and lower copper clad areas 6 of the circuit board 3 correspond to each other and are conductively connected by vias 7. A filter device 8 is arranged at the position of the shielding cavity 5. The external connection line 9 passes through the filter device 8 to filter out high-frequency clutter signals on the signal, thereby minimizing the conduction and spatial coupling between the power supply and the signal.

[0038] Based on the above device, in the present embodiment, a method for realizing electromagnetic compatibility of a self-powered LRM server module is provided. After the LRM connector 10 is powered on, the circuit board 3 works, and the radiation signal of the internal strong radiation device 15 is attenuated for the first time at the metal shielding cover 18, and the leaked signal is attenuated for the second time at the upper shell 1 and the lower shell 2, forming a double-layer shielding structure for the internal strong radiation device 15 to reduce the radiation signal strength;

[0039] The power supply part isolates the internal radiation signal through the power input shielding cavity 5 to avoid spatial signal coupling; at the same time, the filter device 8 installed on the power input shielding cavity 5 is used to filter out the high-frequency clutter signal on the connection line and reduce the strength of useless conducted signals.

[0040] The LRM connector 10 used is a power and signal separate cavity connector, that is, the power and signal are in different metal cavities of the same connector, and the two are shielded and isolated. The contact gaps between the upper shell 1, the lower shell 2 and the LRM connector 10 are filled with conductive material to ensure conductive continuity.

[0041] The strong signal radiation source of the internal circuit board 3 is partially shielded by a metal shielding cover 18, and the metal shielding cover 18 includes a welding type, a plug-in type, and a shielding cavity provided in the shell.

[0042] The upper shell 1 and the lower shell 2 adopt an inlay matching structure and design a groove 20 on the contact surface, install the conductive material, and lock the upper shell 1 and the lower shell 2 by screws 21, press the conductive material, and realize the shielding seal between the upper shell 1 and the lower shell 2. In addition, the upper shell 1 and the lower shell 2 are provided with a flange 14 at the LRM connector 10, and the flange 14 is a ring structure surrounding the LRM connector 10.

[0043] The above-mentioned specific implementations are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the above-mentioned specific implementations. Any technical solutions that conform to the above-mentioned specific implementations of the present invention and any appropriate changes or substitutions made by ordinary technicians in the relevant technical field shall fall within the patent protection scope of the present invention.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-powered LRM server module electromagnetic compatibility device, comprising a chassis and a functional module, characterized in that: The functional module is inserted into the chassis, the chassis and the functional module are connected through an LRM connector, and the power cavity and the signal cavity on the LRM connector are respectively connected to the corresponding connectors on the chassis; The LRM connector includes a lower shell and an upper shell. The flanges on the upper shell and the lower shell press the conductive elastic material installed on the chassis to form a double-layer shielding structure at the connector part.

2. The electromagnetic compatibility device of a self-powered LRM server module according to claim 1, characterized in that: The upper shell and the lower shell adopt an inlay matching structure and design a groove on the contact surface, install the conductive elastic material, lock the upper shell and the lower shell with screws, press the conductive elastic material, and realize the shielding and sealing between the upper shell and the lower shell.

3. The self-powered LRM server module electromagnetic compatibility device according to claim 2, characterized in that: A circuit board is arranged inside the upper shell body, a strong radiation device is arranged on the circuit board, and a copper-clad area is arranged around the strong radiation device.

4. The electromagnetic compatibility device of a self-powered LRM server module according to claim 3, characterized in that: Metallized holes and vias are designed at certain intervals on the copper clad area, and the grid-arranged metallized holes and vias are connected to the ground layer on the circuit board. A metal shielding cover is provided on the upper part of the ground layer, and the metal shielding cover is provided with mounting pins and fixed to the circuit board through the mounting pins. Finally, the metal shielding cover is welded to the circuit board using the SMT process, and the metal shielding cover is conductively connected to the upper shell nearby.

5. The electromagnetic compatibility device of a self-powered LRM server module according to claim 4, characterized in that: The power cavity and the signal cavity are in a shielded and isolated state, and the contact gaps between the upper shell, the lower shell and the LRM connector are filled with conductive elastic material to ensure conductive continuity.

6. A self-powered LRM server module electromagnetic compatibility device according to claim 5, characterized in that: The upper shell and the lower shell are both designed with shielding compartments at the power supply input part of the corresponding circuit board, and a copper-clad area is arranged on the contact surface of the circuit board with the shielding compartment.

7. The electromagnetic compatibility device of a self-powered LRM server module according to claim 6, characterized in that: The copper-clad area is a ring that surrounds the power supply input part. The upper and lower copper-clad areas of the circuit board correspond to each other and are connected by vias. A filter device is set at the position of the shielding cavity. The external connection passes through the filter device to filter out the high-frequency clutter signal on the signal, thereby minimizing the conduction and spatial coupling between the power supply and the signal.

8. A self-powered LRM server module electromagnetic compatibility method, characterized in that: After the LRM connector is powered on, the circuit board works, and the radiation signal of the internal strong radiation device is attenuated for the first time at the metal shielding cover, and the leaked signal is attenuated for the second time at the upper and lower shells of the module, forming a double-layer shielding structure for the internal strong radiation device to reduce the radiation signal strength; The power supply part isolates the internal radiation signal through the power input shielding cavity to avoid spatial signal coupling; at the same time, the filter components installed on the power input shielding cavity are used to filter out the high-frequency clutter signals on the connection line and reduce the strength of useless conducted signals.

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