Electromagnetic shielding box of electromagnetic test equipment

Abstract

The invention relates to the technical field of electromagnetic tests, in particular to an electromagnetic shielding box of electromagnetic test equipment. The electromagnetic shielding box comprises a box body and a cover body, the box body and the cover body are both made of electromagnetic shielding materials, and the whole electromagnetic shielding box is seamless. The box body is in threaded connection with the cover body, a conductive sealing ring is arranged between contact surfaces of the box body and the cover body, an interface connector is arranged on the electromagnetic shielding box, meanwhile, the interface connector is connected with a shell, the electromagnetic shielding box is grounded, and a through conductor is formed. According to the electromagnetic shielding box, through the design of penetrating through the conductor and preventing the conductor cable from directly penetrating through the box body, electromagnetic interference on test equipment is effectively reversed while electromagnetic introduction is reduced, the shielding effectiveness of the shielding box is realized, the test troubleshooting difficulty is reduced, the accuracy of an electromagnetic compatibility test is ensured, and the test efficiency is improved. The test reliability of the electronic equipment in the complex electromagnetic environment is improved, the influence of the test equipment on the test result is reduced to the maximum extent at low cost, the delay of the test progress is reduced, and the test cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic testing, and in particular to an electromagnetic shielding box for electromagnetic testing equipment. Background Art

[0002] Electromagnetic testing is a crucial step in ensuring that electronic products function properly in various electromagnetic environments. However, when problems arise during testing, poor electromagnetic design of the test equipment often makes it difficult to trace the source of the problem. It's impossible or difficult to quickly determine whether the fault is caused by the product under test or the test equipment. This not only increases the difficulty of troubleshooting, but also prolongs testing time, often leading to low test efficiency. This uncertainty poses a challenge to R&D progress and cost control.

[0003] If the electromagnetic design issues of the test equipment itself are addressed, then the host computer would need to be redesigned for electromagnetic compatibility shielding. However, factors such as project funding and human resources often make it difficult to allocate significant resources to the electromagnetic compatibility design of test equipment that is not part of the test assessment. Therefore, there is an urgent need to provide a low-cost shielded test equipment structure to address the previous problem of being unable to quickly trace the source of problems caused by poor electromagnetic design of the test equipment during electromagnetic testing, thereby improving the accuracy and efficiency of electromagnetic testing. Summary of the Invention

[0004] The purpose of the present invention is to provide an electromagnetic shielding box for electromagnetic test equipment, so as to solve the problem that when problems occur in electromagnetic tests in the past, the source cannot be quickly traced due to poor electromagnetic design of the test equipment, thereby improving the accuracy and efficiency of the electromagnetic test.

[0005] In order to achieve the above object, the present invention provides an electromagnetic shielding box for electromagnetic test equipment, comprising:

[0006] The box is made of electromagnetic shielding material, using an integrated molding process, and has at least one open end for taking and placing the test equipment;

[0007] The cover is made of electromagnetic shielding material and is seamless. It is used to cover the open end of the box. The cover is screwed to the box. A conductive sealing ring is provided between the contact surfaces of the box and the cover. The box or cover is also provided with multiple interface connectors for connecting the test equipment in the box with the tested product outside the box. The interface connectors are connected to the box or cover where the shell is located, so that the interface connectors and the box or cover are electrically connected.

[0008] The electromagnetic shielding box is grounded to form a through conductor.

[0009] Optionally, the electromagnetic shielding material used to make the box body and the cover body is aluminum alloy.

[0010] Optionally, a conductive rubber plate is provided between each interface connector and the box or cover in which it is located.

[0011] Optionally, a battery is integrated into the box to serve as a power source for the test equipment.

[0012] Optionally, a backup power supply is also provided in the box.

[0013] Optionally, the interface connector includes one or more of J30J-37TJP, J30J-25TJP, J30J-9TJP, J30J-37ZKL, and J30J-15TJL.

[0014] Optionally, the box or cover is further provided with a BNC adapter and a network port, and is connected to the box or cover where the shell is located.

[0015] Optionally, the conductive sealing ring is made of silicone rubber as a base material, which is doped with metal conductive fillers and then molded and vulcanized.

[0016] Optionally, the conductive rubber sheet is formed by evenly distributing conductive particles in silicone rubber, and conducting electricity by bringing the conductive particles into contact through pressure.

[0017] Optionally, the conductive particles are one or more of glass-silvered, aluminum-silvered and silver.

[0018] The above technical solution of the present invention has the following advantages:

[0019] The electromagnetic shielding box of the electromagnetic test equipment provided by the present invention includes a box body and a cover body, both of which are made of electromagnetic shielding materials and adopt an integrated molding process, and are seamless as a whole. The box body and the cover body are screwed together, and a conductive sealing ring is provided between the contact surfaces of the box body and the cover body. An interface connector is provided on the box body or the cover body, and the interface connector is electrically connected to the box body or the cover body in which it is located. Through seamless design and avoiding the conductor cable directly passing through the box body, a closed box body is formed as much as possible, thereby reducing electromagnetic shielding interference; the box body and the cover body are connected by screwing, the interface connector is connected to the box body or the cover body, and the electromagnetic shielding box is grounded to form a through conductor, which effectively reverses the electromagnetic interference to the test equipment, improves the shielding efficiency of the shielding box, helps to ensure the accuracy of the electromagnetic compatibility test, and improves the reliability of the performance test of the electronic equipment in a complex electromagnetic environment; avoids the influence of the test equipment on the test environment, reduces the difficulty of troubleshooting the test; and minimizes the influence of the test equipment on the test results, the delay of the test progress, and saves the test cost at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings of the present invention are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not necessarily be consistent with the actual product.

[0021] Figure 1 This is a schematic diagram of the connection relationship between an electromagnetic shielding box of an electromagnetic test equipment and a product under test in an embodiment of the present invention;

[0022] Figure 2 1 is a structural schematic diagram of an electromagnetic shielding box of an electromagnetic test equipment according to an embodiment of the present invention (the cover is made transparent);

[0023] Figure 3 This is a structural diagram of a cover body according to an embodiment of the present invention;

[0024] Figure 4 A schematic structural diagram of a box according to an embodiment of the present invention.

[0025] In the picture:

[0026] 1: box;

[0027] 2: cover;

[0028] 21: handle;

[0029] 3: conductive sealing ring;

[0030] 4: Interface connector. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] The electromagnetic shielding box of the electromagnetic test equipment provided in this embodiment mainly considers the following:

[0033] 1) Structural box design

[0034] During the design and manufacturing of electromagnetic shielding boxes, the design of the structural enclosure plays a crucial role in the usability and practicality of the tooling. When selecting materials for the structural enclosure, aluminum alloys are preferred, due to their high conductivity, corrosion resistance, excellent weldability, and ease of forming. A one-piece design approach is also employed to minimize seams and connection points within the electromagnetic shielding box.

[0035] 2) External connection interface and shielding design

[0036] The enclosure's interior features a closed, integrated design, minimizing potential electromagnetic interference introduced by external power cables. Multiple interfaces within the enclosure enable communication without requiring cables to pass directly through the enclosure. Conductive sealing rings are used at the interface between the enclosure and the cover, while conductive rubber sheets are used to seal the connector gaskets and other areas. Connecting the connector to the enclosure and grounding the enclosure creates a strong electrical connection and also creates a through-conductor, directly dispersing electromagnetic interference that could potentially propagate to devices on one side.

[0037] In summary, by reducing extra gaps and holes through seamless design and avoiding the conductor cables from passing directly through the box, a closed box is formed as much as possible to reduce the interference of electromagnetic shielding; by effectively grounding the shell and achieving through-conductor, the electromagnetic interference to the test equipment is effectively reversed, and the shielding effectiveness of the shielding box is improved, which helps to ensure the accuracy of electromagnetic compatibility tests and improve the reliability of performance tests of electronic equipment in complex electromagnetic environments; it avoids the impact of test equipment on the test environment and reduces the difficulty of troubleshooting the test; and it minimizes the impact of test equipment on test results, delays to test progress, and saves test costs at a low cost.

[0038] The present invention is further described below by means of specific examples:

[0039] In one example, see Figures 2 to 4 As shown, the electromagnetic shielding box for electromagnetic test equipment includes a box body 1 and a cover body 2. Both the box body 1 and the cover body 2 are made of electromagnetic shielding materials and are seamlessly welded. At least one end of the box body 1 is open for placing the test equipment. The interior of the box body 1 is used to place the test equipment. The cover body 2 is used to cover the open end of the box body 1 and is threadedly connected to the box body 1. The number of covers 2 is the same as the number of boxes 1, that is, a cover body 2 is provided at the open end of each box body.

[0040] A conductive sealing groove is provided between the contact surface of the box body 1 and the cover body 2 to fill the conductive sealing ring 3. A plurality of interface connectors 4 are provided on the box body 1 or an interface connector 4 is provided on the cover body 2 (see Figure 3 Alternatively, both the housing 1 and the cover 2 may be provided with an interface connector 4, which connects the test equipment inside the housing to the product under test outside the housing. This allows for communication without requiring cables to pass through the housing. Interface connector 4 is connected to the housing 1 or cover 2, which are then grounded, forming a through-conductor that directly disperses electromagnetic interference that might otherwise propagate to a device on one side.

[0041] In order to power the test equipment inside the box and minimize potential electromagnetic interference introduced by individual power lines, in one implementation of this embodiment, a 220V lithium battery is also integrated into the box 1, which serves as the power input device for the test equipment. More preferably, a DC regulated power supply is provided, in which case the 220V lithium battery integrated into the box 1 serves as the power input device for the test equipment and the regulated power supply. To improve data security, it is further preferred that a backup power supply is also provided in the box 1, for example, a reserved 27V lithium battery, which can be used to maintain the ability to temporarily power on the product for testing in the event of an emergency such as a power outage in the field.

[0042] See also Figure 1 As shown, when in use, the test equipment is installed in the box 1, and the test equipment is connected to the external tested product through the interface connector 4. The battery powers the test equipment, and the cover 2 seals the box 1, minimizing the electromagnetic interference of the test equipment. The design of the through-conductor directly disperses the interference that may be transmitted to the test equipment, thereby reducing the impact of the test equipment on the tested product during the electromagnetic test, ensuring the accuracy of the electromagnetic compatibility test, and improving the reliability of the performance test of electronic equipment in a complex electromagnetic environment. In addition, even if interference occurs, it can be quickly checked, reducing the difficulty of troubleshooting the test. And at a low cost, the impact of the test equipment on the test results, the delay of the test progress, and the consumption of test costs are minimized to the greatest extent.

[0043] In one example, the electromagnetic shielding material used to make the box and the cover is 6063 aluminum alloy, which has a high electrical conductivity, usually between 45% and 58% IACS, and a tensile strength usually between 160 MPa and 210 MPa.

[0044] In one example, a conductive rubber sheet (not shown) is provided between each interface connector 4 and the housing 1 or cover 2 in which it is located. The conductive rubber sheet is made of existing materials. In one example, the conductive rubber sheet comprises conductive particles evenly distributed within silicone rubber, with pressure applied to bring the conductive particles into contact to achieve conductivity. Preferably, the conductive particles are one or more of silver-plated glass, silver-plated aluminum, and silver. It should be noted that the fabrication of the conductive rubber sheet is conventional and will not be further described here.

[0045] In this embodiment, preferably, the cover 2 and the box body 1 are fixed with a plurality of bolts at even intervals.

[0046] In one example, the conductive sealing ring 3 is made of silicone rubber as a base material, doped with metal conductive fillers, and then molded and vulcanized. It should be noted that the production of the conductive sealing ring 3 is a prior art and will not be described in detail here.

[0047] In this embodiment, the interface connector 4 can be set according to the test requirements. In one example, the interface connector 4 includes one or more of J30J-37TJP, J30J-25TJP, J30J-9TJP, J30J-37ZKL, and J30J-15TJL.

[0048] In one example, a BNC adapter is provided on the housing 1 or cover 2 to facilitate control communication, ensure signal stability, and reduce interference. Furthermore, a network port is provided on the housing 1 or cover 2 for network connection. The BNC adapter and network port connect to the housing 1 or cover 2 where the housing is located. If provided on the housing 1, the BNC adapter connects to the housing 1; if provided on the cover 2, the BNC adapter connects to the housing 2.

[0049] In order to facilitate the disassembly and assembly of the cover 2, in one example, see Figure 3 As shown, a handle 21 is provided on the outer side of the cover body 2 .

[0050] This embodiment also provides an electromagnetic test device including any of the above-mentioned electromagnetic shielding boxes and test equipment (both existing equipment) arranged in the electromagnetic shielding box, which can be directly connected to the tested product through an interface connector for electromagnetic test.

[0051] Any details not described in detail in the present invention are common knowledge or prior art in the art.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that not every embodiment contains only one independent technical solution. In the absence of a conflict of solutions, the various technical features mentioned in each embodiment can be combined in any manner to form other implementation methods that can be understood by those skilled in the art.

[0053] In addition, without departing from the scope of the present invention, the technical solutions described in the aforementioned embodiments may be modified, or some of the technical features thereof may be replaced by equivalents, without causing the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromagnetic shielding box for electromagnetic test equipment, characterized in that: include: The box is made of electromagnetic shielding material, using an integrated molding process, and has at least one open end for taking and placing the test equipment; The cover is made of electromagnetic shielding material and is seamless. It is installed on the open end of the box and is screwed to the box. A conductive sealing ring is provided between the contact surfaces of the box and the cover. The box or the cover is also provided with a plurality of interface connectors for connecting the test equipment in the box with the tested product outside the box. The interface connectors are connected to the box or the cover where the shell is located, so that the interface connectors are electrically connected to the box or the cover. The electromagnetic shielding box is grounded to form a through conductor.

2. The electromagnetic shielding box according to claim 1, characterized in that: The electromagnetic shielding material used to make the box body and the cover body is aluminum alloy.

3. The electromagnetic shielding box according to claim 1, wherein: A conductive rubber plate is provided between each of the interface connectors and the box body or the cover body.

4. The electromagnetic shielding box according to claim 1, wherein: The box is also integrated with a battery, which is used as a power source for the test equipment.

5. The electromagnetic shielding box according to claim 4, characterized in that: A backup power supply is also provided in the box.

6. The electromagnetic shielding box according to claim 1, characterized in that: The interface connector includes one or more of J30J-37TJP, J30J-25TJP, J30J-9TJP, J30J-37ZKL, and J30J-15TJL.

7. The electromagnetic shielding box according to claim 1, characterized in that: The box or the cover is also provided with a BNC adapter and a network port, and is connected to the box or the cover where the shell is located.

8. The electromagnetic shielding box according to claim 1, wherein: The conductive sealing ring is made of silicone rubber as a base material, doped with metal conductive fillers and then molded and vulcanized.

9. The electromagnetic shielding box according to claim 1, characterized in that: Conductive rubber sheet is made by evenly distributing conductive particles in silicone rubber and making the conductive particles contact through pressure to achieve conductivity.

10. The electromagnetic shielding box according to claim 9, characterized in that: The conductive particles are one or more of glass-silvered, aluminum-silvered and silver.

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