A shielded room structure for radiation emission testing

Abstract

The utility model discloses a shielding room structure for radiation emission test, including bottom plate, fixedly connected on the shielding room of bottom plate, fixedly connected on the shielding room of PLC controller, rotationally connected and the opening door of circumferential array on the shielding room. The utility model discloses the synergetic effect of driving assembly and adjusting assembly, and the size of shielding room inside space is adjusted flexibly, and the different size measured piece from small -size electronic chip to large -scale communication equipment is adapted, need not to build multiple different specifications' shielding room, and the use cost is reduced greatly, and the test demand of multiple types measured piece is satisfied simultaneously, and the elastic clamping structure is used to wave -absorbing replacement subassembly, and the wave -absorbing board of different material can be replaced fast, and the absorption demand of different test frequency band is adapted, and the efficient absorption of electromagnetic wave is ensured, and electromagnetic interference is reduced, and the maintenance and update of wave -absorbing board are convenient simultaneously, avoid the influence test result because of the performance recession of wave -absorbing board, and the accuracy and reliability of test data are improved.

Description

Technical Field

[0001] This utility model relates to the field of shielded room technology, specifically to a shielded room structure for radiation emission testing. Background Technology

[0002] The shielded structure for radiated emission testing plays a crucial role in the research, development, production, and quality inspection of electronic equipment. With the rapid development of electronic technology, the electromagnetic radiation generated by various electronic devices is becoming increasingly prominent. Accurately testing the radiated emission characteristics of electronic equipment is critical for ensuring compliance with electromagnetic compatibility standards, preventing interference with other equipment, and guaranteeing the stable operation of the entire electromagnetic environment. The shielded room for radiated emission testing is the core facility providing an interference-free testing environment for this type of testing, and its performance directly determines the accuracy and reliability of the test results.

[0003] In existing technologies, shielded chambers for radiated emission testing generally employ a fixed-size design. They are constructed from a fixed-dimensional frame structure, and the internal space cannot be adjusted after completion. The shielding function relies primarily on fixedly installed absorbing panels. These panels are typically made of composite materials with specific electromagnetic properties and are fixed to the frame using bolts, nuts, adhesives, or other methods to create a closed testing space. Their working principle utilizes the material's absorption properties of electromagnetic waves, converting the energy of electromagnetic waves entering the shielded chamber into heat or other forms of energy, thereby reducing the entry of external electromagnetic interference and the leakage of internal electromagnetic signals, creating a relatively pure electromagnetic environment for testing. During radiated emission testing, the device under test (DUT) is placed at a specific test location within the shielded chamber, and the radiated emission generated by the DUT is measured and analyzed using testing instruments.

[0004] However, this existing technical solution has several problems that urgently need to be addressed. First, the core function of a shielded room for radiated emission testing is to "provide an interference-free testing environment suitable for the device under test (DUT). However, in actual testing scenarios, the sizes of DUTs vary widely, from tiny electronic chips the size of a fingernail to massive communication equipment the size of a server rack. A shielded room with a fixed size struggles to provide adequate testing space for DUTs of different sizes. When the DUT is small and the shielded room is too large, precise control of the testing environment becomes difficult, and external interference can easily penetrate, affecting test accuracy. When the DUT is large and the shielded room is insufficient, it simply cannot be accommodated for testing. This inability to flexibly adjust the space size according to the DUT size directly results in a loss of "scenario adaptability," leading to poor test compatibility and an inability to meet the testing needs of various different DUTs. Moreover, to test DUTs of different sizes, multiple shielded rooms of different sizes may need to be built, which undoubtedly increases operating costs significantly.

[0005] Secondly, the fixed absorbing panel, as the core component of the shielded room for absorbing electromagnetic waves and reducing interference, suffers from serious drawbacks due to its non-adjustable and non-replaceable design. In different testing scenarios, the radiation characteristics of the device under test (DUT) and the testing frequency band vary, necessitating precise optimization of the absorbing panel's absorption performance based on the actual situation. For high-frequency radiation testing, the absorbing panel may require stronger absorption capabilities for specific frequency bands; while for low-frequency testing, it needs to perform well within the corresponding frequency band. However, the existing non-adjustable and non-replaceable fixed absorbing panel design makes it impossible to adjust or replace the panel according to actual testing needs, directly negating the core capability of "scenario adaptation and precise optimization." Furthermore, during long-term use in the shielded room, the absorbing panel may experience performance degradation or damage, requiring maintenance and replacement. The non-replaceable design makes maintenance extremely complex and difficult, increasing costs and time, affecting the normal operation of the shielded room, leading to unstable electromagnetic wave absorption capabilities, and consequently impacting the accuracy of test results. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a shielded chamber structure for radiated emission testing. Through the synergistic action of the drive and adjustment components, the internal space size of the shielded chamber can be flexibly adjusted to accommodate test devices of different sizes, ranging from small electronic chips to large communication equipment. This eliminates the need to construct multiple shielded chambers of different specifications, significantly reducing operating costs. Simultaneously, it meets the testing needs of various types of test devices. The absorbing plate replacement component adopts a flexible snap-fit ​​structure, allowing for quick replacement of absorbing plates of different materials to meet the absorption requirements of different test frequency bands, ensuring efficient absorption of electromagnetic waves and reducing electromagnetic interference. Furthermore, it facilitates the maintenance and replacement of the absorbing plates, preventing performance degradation from affecting test results and improving the accuracy and reliability of test data.

[0007] The purpose of this utility model is achieved by the following technical solution: a shielded room structure for radiation emission testing, including a base plate, a shielded room fixedly connected to the base plate, a PLC controller fixedly connected to the shielded room, an opening door rotatably connected and arranged in a circular array on the shielded room, a drive assembly installed on the shielded room, an adjustment assembly installed on the drive assembly, a wave-absorbing replacement assembly installed on the adjustment assembly, and a wave-absorbing plate installed on the wave-absorbing replacement assembly. The adjustment assembly includes a sliding frame one and a sliding frame two. The drive component is used to control the movement of sliding bracket one and sliding bracket two on the adjustment component, and the wave absorption replacement component is used to replace wave absorption panels of different materials.

[0008] In one optional embodiment, the drive assembly includes a motor 1 fixedly connected to the shielded chamber, a screw 1 fixedly connected to the output end of the motor 1, a limiting rod 1 fixedly connected to the inside of the shielded chamber, a motor 2 fixedly connected to the shielded chamber, a screw 2 fixedly connected to the output end of the motor 2, and a limiting rod 2 fixedly connected to the inside of the shielded chamber. The motor 1 is used to drive the sliding frame 1 on the screw 1 to move along the axial direction of the screw 1, and the motor 2 is used to drive the sliding frame 2 on the screw 2 to move along the axial direction of the screw 2.

[0009] In one optional embodiment, the adjustment assembly further includes a first hanging rod fixedly connected to the first sliding frame and arranged linearly, a second hanging rod fixedly connected to the second sliding frame and arranged linearly, and a sliding block with one end slidably connected to the second sliding frame. The first sliding frame is slidably connected to the other end of the sliding block. The first sliding frame has a through hole and is slidably connected to the first limiting rod through the through hole. The second sliding frame has a through hole and is slidably connected to the second limiting rod through the through hole.

[0010] In one optional embodiment, sliding frame one and sliding frame two are connected at a 90-degree angle and form a quarter area with the shielded room.

[0011] In one optional embodiment, when screw one rotates and screw two rotates, sliding frame one and sliding frame two move in opposite directions, and the sliding block slides on sliding frame one and sliding frame two.

[0012] In one optional implementation, when the sliding block is at the center of sliding frame one and sliding frame two, sliding frame one and sliding frame two divide the shielding chamber into four equal parts.

[0013] In one optional embodiment, the microwave absorption replacement assembly includes a fixed plate fixedly connected to the microwave absorption plate, sliders symmetrically arranged on the fixed plate and slidably connected to the fixed plate, and an elastic pressure plate rotatably connected to the slider. The elastic pressure plate is snapped onto a hanging rod one or a hanging rod two via an elastic plate.

[0014] In one alternative implementation, the elastic pressure plate is bent in a V-shape.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By working together with the drive and adjustment components, the internal space of the shielded room can be flexibly adjusted to accommodate test devices of different sizes, from small electronic chips to large communication equipment. This eliminates the need to build multiple shielded rooms of different specifications, significantly reducing operating costs while meeting the testing needs of various types of test devices.

[0016] 2. The wave-absorbing replacement component adopts a flexible snap-fit ​​structure, which can quickly replace the wave-absorbing plate with different materials to adapt to the absorption requirements of different test frequency bands, ensuring efficient absorption of electromagnetic waves and reducing electromagnetic interference; at the same time, it facilitates the maintenance and replacement of the wave-absorbing plate, avoids the impact of wave-absorbing plate performance degradation on test results, and improves the accuracy and reliability of test data. Attached Figure Description

[0017] Figure 1 A perspective view of a shielded chamber structure for radiated emission testing; Figure 2 This is a three-dimensional view of a shielded chamber structure used for radiated emission testing from another angle. Figure 3 This is a schematic diagram of the internal structure of a shielded chamber used for radiation emission testing. Figure 4 This is a schematic diagram of the drive component. Figure 5 A schematic diagram of the structure of the adjustment component; Figure 6 A schematic diagram of the structure for replacing the absorbing component.

[0018] In the diagram: 1. Base plate; 21. Motor 1; 22. Screw 1; 23. Limit rod 1; 24. Sliding frame 1; 25. Hanging rod 1; 26. Motor 2; 27. Screw 2; 28. Limit rod 2; 29. ​​Sliding frame 2; 210. Hanging rod 2; 211. Sliding block; 212. Shielding chamber; 31. Fixed plate; 32. Slider; 33. Elastic pressure plate; 34. Wave-absorbing plate; 4. PLC controller; 5. Opening door. Detailed Implementation

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, the internal connection of two elements, or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0023] Please refer to Figure 1-6 A shielded room structure for radiation emission testing includes a base plate 1, a shielded room 212 fixedly connected to the base plate 1, a PLC controller 4 fixedly connected to the shielded room 212, an opening door 5 rotatably connected and arranged in a circular array on the shielded room 212, a drive assembly installed on the shielded room 212, an adjustment assembly installed on the drive assembly, a wave-absorbing replacement assembly installed on the adjustment assembly, and a wave-absorbing plate 34 installed on the wave-absorbing replacement assembly. The adjustment assembly includes a sliding frame 24 and a sliding frame 29. The drive assembly controls the movement of sliding bracket 24 and sliding bracket 29 on the adjustment assembly. The wave-absorbing replacement assembly is used to replace wave-absorbing panels 34 of different materials. The base plate 1 provides a stable installation foundation for the shielded room 212, ensuring equipment stability during testing. The PLC controller 4 enables automated and precise control with convenient operation. The opening door 5 facilitates the placement and removal of the test piece, and the circumferential array design improves the sealing performance of the shielded room 212. The drive assembly and adjustment assembly work together to achieve flexible spatial adjustment, and the wave-absorbing replacement assembly facilitates the replacement of wave-absorbing panels 34. All components work together to improve the adaptability and practicality of the shielded room.

[0024] In a preferred embodiment of this utility model, the drive assembly includes a motor 21 fixedly connected to the shielded chamber 212, a screw 22 fixedly connected to the output end of the motor 21, a limiting rod 23 fixedly connected to the inner side of the shielded chamber 212, a motor 26 fixedly connected to the shielded chamber 212, a screw 27 fixedly connected to the output end of the motor 26, and a limiting rod 28 fixedly connected to the inner side of the shielded chamber 212. The motor 21 is used to drive the sliding bracket 24 on the screw 22 along the axis of the screw 22. Moving in the linear direction, motor 26 drives the sliding frame 29 on screw 27 to move along the axis of screw 27. Motor 1 21 and screw 1 22, and motor 26 and screw 27 provide stable power to sliding frame 1 24 and sliding frame 29 respectively, ensuring precise transmission and accurate spatial adjustment. Limiting rod 1 23 and limiting rod 28 respectively restrict the movement trajectory of sliding frame 1 24 and sliding frame 29 to avoid deviation, improve equipment operation stability, and ensure precise and controllable adjustment of the test environment.

[0025] In a preferred embodiment of this utility model, the adjustment assembly further includes a hanging rod 25 fixedly connected to the sliding frame 24 and arranged linearly, a hanging rod 210 fixedly connected to the sliding frame 29 and arranged linearly, and a sliding block 211 slidably connected at one end to the sliding frame 29. The sliding frame 24 is slidably connected to the other end of the sliding block 211. The sliding frame 24 has a through hole and is slidably connected to the limiting rod 23 through the through hole. The sliding frame 29 has a through hole and is slidably connected to the limiting rod 28 through the through hole. The hanging rod 25 and the hanging rod 210 provide stable installation points for the wave-absorbing replacement assembly. The linear arrangement design can accommodate the installation of multiple wave-absorbing plates 34, improving the electromagnetic wave absorption coverage. The sliding block 211 realizes the flexible linkage between the sliding frame 24 and the sliding frame 29, ensuring smooth cross-movement. The limiting rod 23 and the limiting rod 28 further enhance the movement stability, ensuring a smooth and uninterrupted spatial adjustment process.

[0026] In a preferred embodiment of this utility model, the sliding frame 24 and the sliding frame 29 are connected at a 90-degree angle and form a quarter area with the shielding chamber 212. The test space can be flexibly divided according to the size of the test piece, making the test area layout more reasonable, while improving the uniformity of electromagnetic wave absorption, reducing test blind spots, and ensuring the comprehensiveness of test results.

[0027] In a preferred embodiment of this utility model, when screw 22 rotates and screw 27 rotates, sliding frame 24 and sliding frame 29 move in opposite directions. Sliding block 211 slides on sliding frame 24 and sliding frame 29. The rotation of screw 22 and screw 27 causes sliding frame 24 and sliding frame 29 to move in opposite directions. Combined with the bidirectional sliding of sliding block 211, multi-dimensional adjustment of the test space can be achieved. It can accurately adapt to the installation and testing requirements of test pieces of different sizes. The operation is flexible and the adjustment range is wide.

[0028] In a preferred embodiment of this utility model, when the sliding block 211 is at the center of the sliding frame 24 and the sliding frame 29, the sliding frame 24 and the sliding frame 29 divide the shielding chamber 212 into four equal parts. When the sliding block 211 is at the center, the sliding frame 24 and the sliding frame 29 divide the shielding chamber 212 into four equal parts, forming a standardized test space, which meets the test requirements of conventional sized test pieces, and at the same time provides convenience for the unified calibration of test parameters, improving the comparability and standardization of test data.

[0029] Please refer to Figure 6 In a preferred embodiment of this utility model, the microwave absorbing plate replacement assembly includes a fixed plate 31 fixedly connected to the microwave absorbing plate 34, sliders 32 symmetrically arranged and slidably connected to the fixed plate 31, and elastic pressure plates 33 rotatably connected to the sliders 32. The elastic pressure plates 33 are snapped onto the first hanging rod 25 or the second hanging rod 210. The fixed plate 31 provides a stable mounting carrier for the microwave absorbing plate 34. The symmetrically arranged sliders 32 can adjust the position of the elastic pressure plates 33 to adapt to hanging rods with different spacing. The snap-fit ​​fixing method of the elastic pressure plates 33 is simple to operate and can complete the installation and disassembly of the microwave absorbing plate 34 without complicated tools, thereby improving replacement efficiency and reducing maintenance costs.

[0030] In a preferred embodiment of this utility model, the elastic pressure plate 33 is bent in a V-shape, which enhances the elastic force and stability during the snap-fit, ensuring that the absorber plate 34 does not loosen during the test; at the same time, the bent structure is easy to operate, and the snap-fit ​​can be released by prying it open, further improving the convenience of replacing the absorber plate 34 and ensuring the continuous and stable operation of the equipment.

[0031] When working, first fix the shielding chamber 212 on a flat ground using the base plate 1, open the opening door 5 of the circular array, place the test piece in the preset position inside the shielding chamber 212, and close the opening door 5 to ensure that the shielding chamber 212 is sealed.

[0032] Based on the size of the device under test and the required test frequency, parameters are set via PLC controller 4. If adjustment of the internal space of the shielded chamber 212 is needed, motors 21 and 26 of the drive assembly are activated. Motor 21 drives screw 22 to rotate, and sliding frame 24 moves along the axis of screw 22, maintaining stable movement under the guidance of limit rod 23. Motor 26 drives screw 27 to rotate, and sliding frame 29 moves along the axis of screw 27, with limit rod 28 acting as a guide and limit. Sliding frame 24 and sliding frame 29 are connected at a 90-degree angle, and sliding engagement is achieved through sliding block 211. During the cross-movement, sliding block 211 slides simultaneously on both sliding frame 24 and sliding frame 29. When sliding block 211 is at the center of both, sliding frame 24 and sliding frame 29 divide the shielded chamber 212 into four equal parts, allowing for adjustments to form test areas of different sizes as needed.

[0033] If it is necessary to replace the absorbing plate 34 with one that is compatible with the test frequency band, the absorbing plate replacement component operation is performed as follows: push the slider 32 on the fixed plate 31 to adjust its position, align the seven-shaped bent elastic pressure plate 33 with the hanging rod 25 of the sliding frame 24 or the hanging rod 210 of the sliding frame 29, and use the elastic clamping of the elastic pressure plate 33 to fix it, thus completing the installation of the absorbing plate 34; when disassembling, pull out the elastic pressure plate 33 to release the clamping, and the absorbing plate 34 can be removed and replaced with a model of a different material.

[0034] After all adjustments are completed, the shielded room 212 forms an interference-free testing environment adapted to the device under test and the test frequency band. The test instrument can be started to measure the radiated emission characteristics of the device under test. During the test, the PLC controller 4 can monitor the equipment operation status in real time.

[0035] Although only certain components and embodiments of this application have been illustrated and described, many modifications and alterations will be apparent to those skilled in the art without actually departing from the scope and spirit of the claims, such as variations in the size, dimensions, structure, shape and proportion of the various elements, installation arrangement, material use, color, orientation, etc.

[0036] Finally, it should be noted that the above embodiments are only preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A shielded chamber structure for radiated emission testing, characterized in that: Includes a base plate (1), a shielding chamber (212) fixedly connected to the base plate (1), a PLC controller (4) fixedly connected to the shielding chamber (212), an opening door (5) rotatably connected and arranged in a circular array on the shielding chamber (212), a drive assembly installed on the shielding chamber (212), an adjustment assembly installed on the drive assembly, a wave-absorbing replacement assembly installed on the adjustment assembly, and a wave-absorbing plate (34) installed on the wave-absorbing replacement assembly. The adjustment assembly includes a sliding frame one (24) and a sliding frame two (29). The drive assembly is used to control the movement of sliding frame one (24) and sliding frame two (29) on the adjustment assembly, and the wave absorption replacement assembly is used to replace wave absorption plates (34) of different materials.

2. The shielded chamber structure for radiated emission testing according to claim 1, characterized in that, The drive assembly includes a motor (21) fixedly connected to the shielded chamber (212), a screw (22) fixedly connected to the output end of the motor (21), a limiting rod (23) fixedly connected to the inside of the shielded chamber (212), a motor (26) fixedly connected to the shielded chamber (212), a screw (27) fixedly connected to the output end of the motor (26), and a limiting rod (28) fixedly connected to the inside of the shielded chamber (212). The motor (21) is used to drive the sliding frame (24) on the screw (22) to move along the axis of the screw (22), and the motor (26) is used to drive the sliding frame (29) on the screw (27) to move along the axis of the screw (27).

3. The shielded chamber structure for radiated emission testing according to claim 2, characterized in that, The adjustment assembly also includes a hanging rod 1 (25) fixedly connected to the sliding frame 1 (24) and arranged linearly, a hanging rod 2 (210) fixedly connected to the sliding frame 2 (29) and arranged linearly, and a sliding block (211) with one end slidably connected to the sliding frame 2 (29). The sliding frame 1 (24) is slidably connected to the other end of the sliding block (211). The sliding frame 1 (24) has a through hole and is slidably connected to the limiting rod 1 (23) through the through hole. The sliding frame 2 (29) has a through hole and is slidably connected to the limiting rod 2 (28) through the through hole.

4. The shielded chamber structure for radiated emission testing according to claim 3, characterized in that, Sliding frame one (24) and sliding frame two (29) are connected at a 90-degree angle and form a four-part area with the shielded room (212).

5. The shielded chamber structure for radiated emission testing according to claim 3, characterized in that, When screw one (22) rotates and screw two (27) rotates, sliding frame one (24) and sliding frame two (29) move in opposite directions, and sliding block (211) slides on sliding frame one (24) and sliding frame two (29).

6. The shielded chamber structure for radiated emission testing according to claim 1, characterized in that, When the sliding block (211) is at the center of the sliding frame one (24) and the sliding frame two (29), the sliding frame one (24) and the sliding frame two (29) divide the shielding room (212) into four equal parts.

7. The shielded chamber structure for radiated emission testing according to claim 1, characterized in that, The wave-absorbing replacement assembly includes a fixed plate (31) fixedly connected to the wave-absorbing plate (34), a slider (32) symmetrically arranged on the fixed plate (31) and a flexible pressure plate (33) rotatably connected to the slider (32). The flexible pressure plate (33) is snapped onto the first hanging rod (25) or the second hanging rod (210) by the elastic plate.

8. The shielded chamber structure for radiated emission testing according to claim 7, characterized in that, The elastic pressure plate (33) is bent in a figure-eight shape.

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