Test equipment for realizing long-distance communication through short-distance simulation

Abstract

The invention relates to the technical field of communication test equipment, and particularly discloses test equipment for realizing long-distance communication through short-distance simulation, which comprises a shielding darkroom, a signal generating device, a wave-transparent baffle plate and a signal receiving device, and is characterized in that the signal generating device and the signal receiving device are respectively arranged at two ends, far away from each other, in the shielding darkroom; the signal generating device is used for outputting electromagnetic waves with target amplitude outwards, the signal receiving device is used for receiving and detecting the electromagnetic waves emitted by the signal generating device, the wave-transparent baffle is located between the signal generating device and the signal receiving device, and the wave-transparent baffle is a wave-transparent medium with a specific dielectric constant. Electromagnetic waves are attenuated through the wave-transparent baffle, so that space transmission loss of long-distance communication is simulated. Quantitative adjustment of signal space loss is achieved through the wave-transparent baffle, the device has the advantages of being flexible in adjustment, high in simulation precision, reasonable in structure and the like, and a long-distance communication environment test can be effectively simulated and completed in a laboratory (short distance).

Description

Technical Field

[0001] The present invention relates to the technical field of communication test equipment, and in particular discloses a test device for realizing long-distance communication by short-distance simulation. Background Art

[0002] Currently, during the development and testing of high-frequency or long-distance wireless communication equipment, engineers often need to simulate long-distance communication environments within confined spaces to evaluate signal transmission performance and system anti-interference capabilities. However, traditional testing methods, such as direct exposure to open environments or the use of simple isolation enclosures, suffer from significant signal interference, uncontrollable transmission paths, and large fluctuations in test results. Furthermore, because the test environment cannot effectively simulate the spatial propagation characteristics of actual use, the test data is insufficiently valuable, impacting the R&D efficiency and test reliability of communication equipment.

[0003] Especially during high-frequency testing, spatial electromagnetic interference, signal reflections, and test environment consistency become key factors limiting test quality. Therefore, there is an urgent need for test equipment with a compact structure, effective shielding, stable and controllable signal paths, and the ability to simulate long-distance channel conditions over short distances, in order to improve the accuracy and repeatability of wireless communication testing. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a test equipment with a compact structure, good shielding effect, stable and controllable signal path, and suitable for simulating long-distance channel conditions at short distances.

[0005] To achieve the above-mentioned purpose, the present invention provides a test equipment for short-distance simulation of long-distance communication, comprising: a shielded darkroom, a signal generating device, a wave-transparent baffle and a signal receiving device, wherein the signal generating device and the signal receiving device are respectively arranged at two ends away from each other in the shielded darkroom, the signal generating device is used to output electromagnetic waves of target amplitude outward, the signal receiving device is used to receive and detect the electromagnetic waves emitted by the signal generating device, the wave-transparent baffle is located between the signal generating device and the signal receiving device, the wave-transparent baffle is a wave-transparent medium with a specific dielectric constant, and the electromagnetic waves of target amplitude output by the signal generating device are attenuated by the wave-transparent baffle to form electromagnetic waves of actual amplitude received by the signal receiving device, thereby simulating the spatial transmission loss of long-distance communication. The present invention realizes quantitative adjustment of signal spatial loss through the wave-transparent baffle, has the advantages of flexible adjustment, high simulation accuracy, and reasonable structure, and can effectively simulate and complete long-distance communication environment testing in the laboratory (short distance). Avoid equipment saturation due to too close distance, and at the same time, there is no need to reduce the base station power to maintain the real working condition signal-to-noise ratio.

[0006] Furthermore, a movable slide is provided within the shielded chamber, through which the signal generator slides and connects to the shielded chamber. The signal generator moves closer to or further away from the signal receiver via the slide, enabling fine-tuning of the communication distance. This allows for fine-tuning spatial transmission loss, providing flexible configuration options for different test scenarios and improving simulation accuracy. Furthermore, the structure is simple, cost-effective, and easily adjustable.

[0007] Furthermore, the shielded chamber is equipped with a slot assembly, through which the wave-transmitting baffles are detachably connected to the shielded chamber. The slot assembly comprises multiple sets of parallel slots, and the wave-transmitting baffles can be inserted, replaced, or stacked along the length. This enables modular coarse adjustment and rapid switching of spatial loss. Simulating different communication environments requires no replacement of the entire structure; simply by replacing the baffles, this improves experimental efficiency and flexibility.

[0008] Furthermore, multiple groups of wave-transmitting baffles are provided, evenly spaced along the length of the shielded chamber. The groups have the same structure and exhibit the same electromagnetic wave attenuation. This ensures signal consistency and stability during the simulation, avoids misjudgments caused by sudden signal changes in a specific area, and facilitates the creation of standardized and repeatable test scenarios.

[0009] Furthermore, the signal generating device includes a movable mounting platform, a signal generator mounted on the movable mounting platform, the signal generator is an AAU device or base station equipment, the movable mounting platform includes a base mounted on a shielded darkroom, a lifting motor and a lifting platform mounted on the base, the signal generator is mounted on the lifting platform, the output shaft of the lifting motor is connected to the lifting platform, the lifting motor drives the lifting platform to drive the signal generator up and down, and adjusts the position of the electromagnetic wave generation. It adapts to the height requirements of different antenna structures or meets the conditions of multi-layer path tests (such as MIMO, beamforming, etc.). The adjustable height improves adaptability and avoids the limitation of the fixed frame on the experiment type.

[0010] Furthermore, the signal receiving device includes a rotating stage mounted on a shielded darkroom, a rotating motor, and a signal terminal. The signal terminal is mounted on the rotating stage, and the output shaft of the rotating motor is connected to the rotating stage. The rotating motor drives the rotating stage, which in turn rotates the signal terminal relative to the shielded darkroom. The signal receiving device is mounted on the rotating stage, which is driven by a motor, allowing the signal terminal to rotate relative to the darkroom, thereby changing the receiving angle or direction. This can simulate the terminal's signal reception capabilities in different directions and postures, making it particularly suitable for verifying next-generation communication technologies such as antenna pattern testing and beam tracking testing.

[0011] Furthermore, the movable rail is provided with a locking mechanism, which includes a locking plate and an electromagnetic assembly mounted on the movable rail. The locking plate is provided with multiple adsorption points. The electromagnetic assembly is connected to the signal generator, and the electromagnetic assembly is a flat adsorption electromagnet. When the electromagnetic assembly is energized, suction is generated, adsorbed to the locking surface, and the signal generator is locked relative to the movable rail. An electromagnetic adsorption locking structure is provided on the rail, including adsorption points, a locking plate, and a flat adsorption electromagnet. The structure is adsorbed when powered on and released when powered off, achieving rail positioning and locking, ensuring the stable position of the mobile platform and preventing data deviation caused by slippage during testing. The electromagnetic locking is easy to control and has high repeatability, which is conducive to automated testing.

[0012] Furthermore, the walls of the shielded chamber are layered with galvanized steel, ferrite, and absorbing materials, sequentially from the outside to the inside. This shielded chamber shields against external electromagnetic waves, providing efficient electromagnetic isolation and a stable, clean testing environment. This complies with communication equipment testing standards (such as 3GPP and YDT), preventing interference from affecting test results.

[0013] Furthermore, the absorbing material layer is made of polyurethane foam, flame-retardant nonwoven fabric, or silicate sheet metal film. These materials have excellent electromagnetic wave absorption properties, enhancing the shielded darkroom's ability to absorb high-frequency signals, suppressing internal reflections, and improving the purity of the testing environment. Furthermore, the materials are flame-retardant and safe, making them suitable for long-term laboratory use.

[0014] Furthermore, the wave-transmitting material baffle is made of a polytetrafluoroethylene-based composite conductive particle press or carbon black microparticle press. It has controllable electromagnetic wave transmission and absorption properties, exhibiting stable attenuation performance for signals in different frequency bands, achieving precise and adjustable frequency band attenuation control. The material is simple to process, low in cost, and highly reliable. It is reusable and suitable for communication testing in multiple frequency bands (such as 2.6 GHz, 3.5 GHz, and Sub-6 GHz).

[0015] Beneficial effects of the present invention:

[0016] By controlling spatial attenuation through wave-transparent baffles and varying the number and parameters of wave-transparent media in the signal path without changing the transmit power, controllable electromagnetic loss is introduced, allowing the signal to simulate the power attenuation of long-distance transmission during short-distance transmission. This allows programmable loss simulation from tens to hundreds of dB, adapting to testing requirements ranging from short-distance high-speed communications (such as 28 GHz) to long-distance, wide-coverage communications (such as 700 MHz). It simulates long-distance signal attenuation without reducing device power or signal-to-noise ratio, effectively avoiding device saturation or misjudgment, and enabling accurate measurement of the true performance of communication equipment.

[0017] By moving and lifting the structure to adjust the path length and transmission height, the path loss can be further fine-tuned, and it can adapt to multiple types of test scenarios (such as elevated AAU, parallel antennas, oblique paths, etc.). Each functional module is independently designed and can be flexibly expanded according to different communication standards, frequency bands or system forms, and has good adaptability to engineering promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic cross-sectional view of a test device for simulating long-distance communication over a short distance according to the present invention;

[0019] Figure 2 This is a schematic structural diagram of a test device for simulating long-distance communication over short distances according to the present invention;

[0020] Figure 3 Schematic diagram of the structure of the signal generating device of the present invention;

[0021] Figure 4 is a schematic structural diagram of a signal receiving device of the present invention;

[0022] Figure 5 is a cross-sectional schematic diagram of the movable slide rail of the present invention;

[0023] Figure 6 It is a cross-sectional schematic diagram of the shielding darkroom of the present invention.

[0024] Reference numerals include:

[0025] 1. Shielded darkroom; 2. Signal generating device; 3. Transparent baffle; 4. Signal receiving device; 5. Movable slide rail; 6. Card slot assembly; 7. Movable mounting platform; 8. Signal generator; 9. Base; 10. Lifting motor; 11. Lifting platform; 12. Rotating platform; 13. Rotating motor; 14. Signal terminal; 15. Locking plate; 16. Electromagnetic assembly; 17. Galvanized steel sheet layer; 18. Ferrite layer; 19. Absorbing material layer; 20. Locking mechanism. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0027] See also Figures 1 to 6As shown, a test equipment for short-distance simulation of long-distance communication of the present invention includes: a shielded darkroom 1, a signal generating device 2, a wave-transparent baffle 3 and a signal receiving device 4, wherein the signal generating device 2 and the signal receiving device 4 are respectively arranged at two ends away from each other in the shielded darkroom 1, the signal generating device 2 is used to output electromagnetic waves of target amplitude, the signal receiving device 4 is used to receive and detect the electromagnetic waves emitted by the signal generating device 2, the wave-transparent baffle 3 is located between the signal generating device 2 and the signal receiving device 4, and the wave-transparent baffle 3 is a wave-transparent medium with a specific dielectric constant. The electromagnetic waves of target amplitude output by the signal generating device 2 are attenuated by the wave-transparent baffle 3 to form electromagnetic waves of actual amplitude received by the signal receiving device 4, thereby simulating the spatial transmission loss of long-distance communication. The present invention realizes quantitative adjustment of signal spatial loss through the wave-transparent baffle 3, has the advantages of flexible adjustment, high simulation accuracy, and reasonable structure, and can effectively simulate and complete long-distance communication environment testing in the laboratory (short distance). Avoid equipment saturation due to too close distance, and at the same time, there is no need to reduce the base station power to maintain the real working condition signal-to-noise ratio.

[0028] Signal generator 2 emits an electromagnetic wave of a certain amplitude. This signal passes through a wave-transmitting baffle 3 positioned between the two. This baffle, made of a material with a specific dielectric constant, achieves a fixed attenuation during the electromagnetic wave's passage, thereby simulating the spatial losses experienced during actual long-distance transmission. This avoids receiver saturation issues encountered in high-power, short-range testing, while ensuring a signal-to-noise ratio closer to that of actual long-distance communications, facilitating accurate evaluation of system performance.

[0029] Compared to traditional open-field testing or coaxial cable testing, this device utilizes a physical design to simulate long-distance communication scenarios within a smaller space, saving testing space and significantly improving test efficiency, overcoming site limitations. Furthermore, the controllable dielectric constant of microwave-transparent materials enables precise modulation of signal path and amplitude. Traditional short-distance testing either reduces power but results in inaccurate signal-to-noise ratios, or results in errors due to insufficient space. This solution utilizes attenuation in the microwave-transparent material to precisely control spatial losses, offering low cost and easy adjustment.

[0030] The formula for spatial propagation loss is: L (dB) = 32.45 + 20logD (km) + 20logF (MHz), where 32.45 is the basic unit conversion constant, D is the signal transmission distance, and F is the signal frequency. As the formula shows, for a given frequency, the longer the signal transmission distance, the greater the spatial loss. By adding or removing wave-transmitting material baffles, significant spatial loss adjustment can be achieved, simulating long-distance communication.

[0031] The shielded chamber 1 is equipped with a movable slide 5, through which the signal generator 2 is slidably connected to the shielded chamber 1. The signal generator 2 is moved closer to or further away from the signal receiver 4 via the slide 5, enabling fine adjustments in communication distance. This allows for fine adjustments in spatial transmission loss, providing flexible configuration options for different test scenarios and improving simulation accuracy. It also features a simple structure, low cost, and easy adjustment.

[0032] The shielded chamber 1 is internally mounted with a movable slide 5, running parallel to the length of the chamber 1. The signal generator 2 is connected to the chamber 1 via the slide, allowing it to slide smoothly along the slide. The slide typically comprises a guide rail and a supporting slider, which securely mounts the base 9 of the signal generator 2. The signal generator 2 is moved along the slide by manual or electric drive, enabling precise adjustment of the signal generation position, thereby varying the physical distance between the transmitter and the signal receiver 4.

[0033] This structural design allows for subtle adjustments to the communication distance during testing, adapting to different test scenarios and equipment parameters, enhancing the flexibility and applicability of the test equipment. The slide rails make adjusting the transmitter position quick and easy, ensuring repeatable and accurate testing, and avoiding the limitations of traditional testing due to fixed distances.

[0034] Traditional long-distance communication testing often relies on physical distance or fixed settings for transmitting and receiving positions, making adjustments cumbersome and inflexible. The mobile rail 5 structure of the present invention enables dynamic adjustment of the transmitter position within the test equipment, reducing reliance on external testing space and improving testing efficiency and versatility. Furthermore, the rail structure, combined with the locking mechanism 20, ensures stable positioning after adjustment, preventing vibration and offset from affecting test results.

[0035] The shielded chamber 1 is equipped with a slot assembly 6, through which the wave-transmitting baffles 3 are detachably connected. The slot assembly 6 comprises multiple parallel slots, and the wave-transmitting baffles 3 are inserted, replaced, or stacked along the length. This allows for modular coarse adjustment and rapid switching of spatial loss. Simulating different communication environments requires no complete replacement of the entire structure; simply replacing the baffles improves experimental efficiency and flexibility.

[0036] The slot structure allows for quick insertion of different wave-transmitting baffles (3 or combinations) to change the overall signal path's effective attenuation, enabling easy adjustment to suit diverse long-distance simulation requirements. Unlike fixed attenuation with a single baffle, this system supports modular, multi-baffle combination adjustment for greater flexibility.

[0037] Multiple groups of wave-transmitting baffles 3 are provided, evenly spaced along the length of the shielded chamber 1. The groups of wave-transmitting baffles 3 have the same structure and electromagnetic wave attenuation. This ensures signal consistency and stability during the simulation process, avoids misjudgments caused by sudden signal changes in a specific area, and facilitates the construction of standardized and repeatable test scenarios.

[0038] The wave-transparent baffles 3 are composed of multiple sets of wave-transparent material plates of the same specifications, installed at equal intervals along the length of the shielded chamber 1. Each set of wave-transparent baffles 3 is constructed of the same material and thickness, ensuring consistent electromagnetic wave attenuation. The wave-transparent baffles 3 are secured to the inner wall of the shielded chamber 1 via a slot assembly 6. Users can insert, replace, or stack multiple sets of wave-transparent baffles 3 based on testing requirements to achieve cumulative electromagnetic wave attenuation.

[0039] This structural design allows the test equipment to flexibly adjust the spatial attenuation of the signal path by simply increasing or decreasing the number of wave-transmitting baffles 3, thereby simulating the signal loss characteristics of different long-distance transmission environments. The equally spaced, multi-group arrangement ensures uniform attenuation distribution along the signal path, preventing signal waveform distortion caused by excessive attenuation or reflection at a single point, thereby improving the accuracy and repeatability of test data.

[0040] Traditional test equipment struggles to achieve fast and flexible spatial attenuation adjustment, often relying on fixed distances or expensive variable attenuators. The present invention employs multiple sets of equally spaced wave-transparent baffles 3, resulting in a simple structure, low cost, and easy maintenance. This allows for comprehensive long-distance communication performance testing in the laboratory under diverse scenarios and conditions, significantly improving test efficiency and applicability.

[0041] The signal generating device 2 includes a movable mounting platform 7, a signal generator 8 mounted on the movable mounting platform 7, the signal generator 8 is an AAU device or a base station device, the movable mounting platform 7 includes a base 9 mounted on the shielded darkroom 1, a lifting motor 10 and a lifting platform 11 mounted on the base 9, the signal generator 8 is mounted on the lifting platform 11, the output shaft of the lifting motor 10 is connected to the lifting platform 11, the lifting motor 10 drives the lifting platform 11 to drive the signal generator 8 up and down, and adjust the position of the electromagnetic wave generation. It adapts to the height requirements of different antenna structures, or meets the conditions of multi-layer path tests (such as MIMO, beamforming, etc.). The adjustable height improves adaptability and avoids the fixed frame limiting the experiment type.

[0042] It is supported by a base 9 fixed to the floor or side wall of the shielded darkroom 1. A precision lifting motor 10 (such as a servo reduction motor) is installed on the base 9. The motor output shaft is directly connected to the lifting platform 11. The lifting platform 11 can move smoothly in the vertical direction. The AAU device or macro base station equipment is installed on it, and the height is adjusted by the rotation of the motor.

[0043] Based on different testing requirements, users can precisely raise and lower the transmitting antenna within a range of tens of centimeters to several meters, simulating the coverage characteristics of base stations at various installation heights, such as high-rise buildings, platforms, or the ground. Electric lifting replaces manual installation, offering fast adjustment speed and high positioning accuracy (up to ±1mm), significantly improving testing efficiency. The motor drive and mechanical guide rails work together to ensure a vibration-free raising and lowering process, eliminating any mechanical resonance that could affect test results.

[0044] Traditional test platforms often use fixed-height brackets or manual jack adjustments, which are not only time-consuming and labor-intensive, but also suffer from poor positioning repeatability. This embodiment utilizes an integrated electric lift design, achieving integrated "height-position-signal" adjustment for ease of operation. The AAU / base station equipment and precision lift motor 10 are integrated into the same movable mounting platform 7, creating a closed-loop controllable system for "transmission height-power output-test environment." This allows for remote simulation testing of various height and power combinations within a single darkroom.

[0045] The signal receiving device 4 includes a rotating platform 12, a rotating motor 13, and a signal terminal 14, mounted on the shielded chamber 1. The signal terminal 14 is mounted on the rotating platform 12, and the output shaft of the rotating motor 13 is connected to the rotating platform 12. The rotating motor 13 drives the rotating platform 12, which in turn rotates the signal terminal 14 relative to the shielded chamber 1. The signal receiving device 4 is mounted on the rotating platform 12, which is driven by a motor, allowing the signal terminal 14 to rotate relative to the chamber, thereby changing the receiving angle or direction. This can simulate the terminal's signal reception capabilities in different directions and postures, making it particularly suitable for verifying next-generation communication technologies such as antenna pattern testing and beam tracking testing.

[0046] In actual use, when rotating motor 13 is activated, it drives rotating stage 12 to rotate about its axis, thereby driving signal terminal 14 to achieve an angularly adjustable receiving posture within shielded chamber 1, thereby simulating the azimuth changes of signal receiving device 4 during actual long-distance communication. This setup allows the test system to more realistically reproduce the angular changes of the receiving terminal relative to the transmitting source during long-distance communication and their impact on communication quality.

[0047] Unlike the fixed receiving devices used in existing technologies, the rotating structure employed in this invention allows for adjustability and mobility of the receiving device, enabling simulation of a variety of receiving angles and spatial postures, significantly enhancing the realism and comprehensiveness of testing. Furthermore, the use of electric drive instead of manual rotation not only improves testing efficiency but also avoids positional errors caused by manual adjustments.

[0048] In addition, the rotating table 12 and the motor can perform fine angle control as required, and can also be combined with an encoder to achieve angle closed-loop feedback control, further improving test accuracy and data repeatability.

[0049] The movable slide 5 is provided with a locking mechanism 20, which includes a locking plate 15 and an electromagnetic assembly 16 mounted on the movable slide 5. The locking plate 15 is provided with multiple adsorption points. The electromagnetic assembly 16 is connected to the signal generating device 2 and is a flat adsorption electromagnet. When the electromagnetic assembly 16 is energized, it generates suction, adsorbs to the locking surface, and locks the signal generating device 2 relative to the movable slide 5. An electromagnetic adsorption locking structure is provided on the slide, including adsorption points, a locking plate 15, and a flat adsorption electromagnet. When energized, it adsorbs and when de-energized, it releases, achieving positioning and locking of the slide, ensuring the stability of the mobile platform and preventing data deviation caused by slippage during testing. The electromagnetic locking is easy to control and has high repeatability, which is beneficial for automated testing.

[0050] When the electromagnetic assembly 16 is powered off, the device can move freely on the movable slide rail 5; when the electromagnetic assembly 16 is powered on, it is adsorbed to the adsorption point of the locking plate 15, thereby achieving position locking and vibration fixation of the signal generating device 2.

[0051] Traditional mechanical locking mechanisms rely on components such as sliders, pins, and springs, which can lead to high wear, difficult control, and inaccurate positioning. Electromagnetic locking mechanisms, on the other hand, require no complex mechanical transmission or manual operation, resulting in fast response times and high reliability. Electromagnetic assembly 16 connects to the control module of the entire communication test system, precisely controlling locking and release electronically, making it suitable for automated testing environments. Multiple adsorption points are provided on locking plate 15, enabling rapid switching and repeated positioning between different test positions, improving equipment testing efficiency.

[0052] The walls of the shielded chamber 1 are sequentially constructed from the outside and inside with a galvanized steel layer 17, a ferrite layer 18, and an absorbing material layer 19. The shielded chamber 1 is designed to shield against external electromagnetic waves. This provides efficient electromagnetic isolation, creating a stable and clean testing environment that complies with communication equipment testing standards (such as 3GPP and YDT), preventing interference from affecting test results.

[0053] The galvanized steel layer 17 provides good low-frequency electromagnetic shielding effect; the ferrite layer 18 is used to absorb mid-frequency electromagnetic waves and reduce reflection; the absorbing material layer 19 absorbs high-frequency microwave signals, effectively reducing multiple reflections and interference of internal electromagnetic waves;

[0054] This structure can form a shielding attenuation capability of up to 90dB or more, ensuring the independence and purity of the electromagnetic environment in the shielding darkroom 1.

[0055] The signal generating device 2 is used to simulate the transmission of long-distance radio electromagnetic waves. Its specific implementation can be a programmable radio frequency transmission module with an external antenna. Its transmission power and frequency range can be set by software to adapt to different communication protocols (such as 5GNR, Wi-Fi, LoRa, etc.).

[0056] The signal receiving device 4 includes a radio frequency receiving module of a corresponding frequency band, which is used to receive the analog signal transmitted after penetrating the wave-transmitting baffle 3 and perform parameter tests such as signal strength, delay, and bit error rate.

[0057] The wave-transparent baffle 3 is a partition plate arranged in the middle of the shielded darkroom 1. It is made of a polymer wave-transparent material (such as PTFE substrate or low dielectric constant ceramic) and is used to artificially set spatial barriers and signal attenuation without interfering with signal transmission.

[0058] Furthermore, in order to simulate the adjustment of the channel path loss, the wave-transparent baffle 3 is provided with an adjustable metal mesh structure. The metal mesh is woven with fine copper-plated wires. The density or aperture of the metal mesh can be changed by a knob slide mechanism, thereby artificially adjusting the loss value of the signal passing path within a fixed space.

[0059] In addition, adjustable mounting brackets for fixing the signal generating device 2 and the signal receiving device 4 respectively are provided at both ends of the shielded darkroom 1. The brackets are provided with slide rails and lifting structures for fine-tuning the height, angle or distance of the transmitting or receiving antenna to adapt to different antenna parameters or multipath test requirements.

[0060] This test equipment is also equipped with a control module and a data processing module. The control module connects the signal generating device 2 and the receiving device through wiring, and is used to initiate test instructions and record the results. The data processing module analyzes and processes indicators such as the strength, spectrum, and bit error rate of the received signal, and can output a communication performance report.

[0061] The test equipment of the present invention can simulate long-distance communication scenarios in a shielded environment, facilitates the development, testing and verification of performance parameters of various communication systems under different path loss conditions, and has the advantages of compact structure, controllable results and strong test repeatability.

[0062] The absorbing material layer 19 is made of polyurethane foam, flame-retardant nonwoven fabric, or silicate sheet metal film. These materials have excellent electromagnetic wave absorption properties, enhancing the shielded darkroom's ability to absorb high-frequency signals, suppressing internal reflections, and improving the purity of the testing environment. Furthermore, the materials are flame-retardant and safe, making them suitable for long-term laboratory use.

[0063] The wave-transmitting material baffle is made of a polytetrafluoroethylene-based composite conductive particle press or carbon black microparticle press. It exhibits controllable electromagnetic wave transmission and absorption properties, exhibiting stable attenuation performance for signals in different frequency bands, achieving precise and adjustable frequency band attenuation control. The material is simple to process, low-cost, and highly reliable. It is reusable and suitable for communication testing in multiple frequency bands (such as 2.6 GHz, 3.5 GHz, and Sub-6 GHz).

[0064] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A test equipment for short-distance simulation to achieve long-distance communication, characterized in that: include: A shielded darkroom (1), a signal generating device (2), a wave-transmitting baffle (3) and a signal receiving device (4); the signal generating device (2) and the signal receiving device (4) are respectively arranged at two ends away from each other in the shielded darkroom (1); the signal generating device (2) is used to output electromagnetic waves of target amplitude outward; the signal receiving device (4) is used to receive and detect the electromagnetic waves emitted by the signal generating device (2); the wave-transmitting baffle (3) is located between the signal generating device (2) and the signal receiving device (4); the wave-transmitting baffle (3) is a wave-transmitting medium with a specific dielectric constant; the electromagnetic waves of target amplitude output by the signal generating device (2) are attenuated by the wave-transmitting baffle (3) and then formed into electromagnetic waves of actual amplitude received by the signal receiving device (4), thereby simulating the spatial transmission loss of long-distance communication.

2. The test equipment for realizing long-distance communication by short-distance simulation according to claim 1, characterized in that: A movable slide rail (5) is provided in the shielded darkroom (1), and the signal generating device (2) is slidably connected to the shielded darkroom (1) via the movable slide rail (5). The signal generating device (2) moves closer to or farther from the signal receiving device (4) via the movable slide rail (5), thereby realizing small-amplitude adjustment of the communication distance.

3. The test equipment for realizing long-distance communication by short-distance simulation according to claim 1, characterized in that: The shielding darkroom (1) is provided with a slot assembly (6), and the wave-transmitting baffle (3) is detachably connected to the shielding darkroom (1) via the slot assembly (6). The slot assembly (6) is a plurality of parallel slot structures, and the wave-transmitting baffle (3) is inserted, replaced, or superimposed and installed along the length direction.

4. The test equipment for realizing long-distance communication by short-distance simulation according to claim 3, characterized in that: The wave-transmitting baffles (3) are provided in multiple groups, and the multiple groups of wave-transmitting baffles (3) are arranged at equal intervals along the length direction of the shielded darkroom (1). The multiple groups of wave-transmitting baffles (3) have the same structure and have the same electromagnetic wave attenuation.

5. The test equipment for realizing long-distance communication by short-distance simulation according to claim 1, characterized in that: The signal generating device (2) comprises a movable mounting platform (7), a signal generator (8) mounted on the movable mounting platform (7), the signal generator (8) being an AAU device or base station equipment, the movable mounting platform (7) comprising a base (9) mounted on the shielded darkroom (1), a lifting motor (10) and a lifting platform (11) mounted on the base (9), the signal generator (8) being mounted on the lifting platform (11), the output shaft of the lifting motor (10) being connected to the lifting platform (11), the lifting motor (10) driving the lifting platform (11) to drive the signal generator (8) to move up and down, thereby adjusting the generating position of the electromagnetic wave.

6. The test equipment for realizing long-distance communication by short-distance simulation according to claim 1, characterized in that: The signal receiving device (4) comprises a rotating table (12) mounted on the shielded darkroom (1), a rotating motor (13) and a signal terminal (14); the signal terminal (14) is mounted on the rotating table (12); the output shaft of the rotating motor (13) is connected to the rotating table (12); the rotating motor (13) drives the rotating table (12) to drive the signal terminal (14) to rotate relative to the shielded darkroom (1).

7. The test equipment for realizing long-distance communication by short-distance simulation according to claim 2, characterized in that: The movable slide rail (5) is provided with a locking mechanism (20), which comprises a locking plate (15) and an electromagnetic assembly (16) mounted on the movable slide rail (5). The locking plate (15) is provided with a plurality of adsorption points. The electromagnetic assembly (16) is connected to the signal generating device (2). The electromagnetic assembly (16) is a planar adsorption type electromagnet. When the electromagnetic assembly (16) is energized, it generates suction and adsorbs on the locking surface, so that the signal generating device (2) is locked relative to the movable slide rail (5).

8. The test equipment for realizing long-distance communication by short-distance simulation according to claim 1, characterized in that: The walls of the shielded darkroom (1) are provided with a galvanized steel plate layer (17), a ferrite layer (18) and an absorbing material layer (19) in sequence from the outside to the inside. The shielded darkroom (1) is used to shield external electromagnetic waves.

9. The test equipment for realizing long-distance communication by short-distance simulation according to claim 8, characterized in that: The wave absorbing material layer (19) is made of polyurethane foam, flame retardant non-woven fabric or silicate plate metal film.

10. The test equipment for realizing long-distance communication by short-distance simulation according to claim 1, characterized in that: The wave-transmitting material baffle is formed by pressing polytetrafluoroethylene-based composite conductive particles or carbon black particulate particles.

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