Electromagnetic shielding device for simulating climatic environment

Abstract

The invention discloses an electromagnetic shielding device for simulating a climatic environment, which is characterized in that an electromagnetic shielding structure, a temperature adjusting module and a humidity adjusting module are integrated in the same shell to form a closed test cavity and are uniformly coordinated by a control system, so that the radio frequency conduction performance of wireless equipment in different temperature and humidity environments can be detected in real time. According to the structure, the tedious operation that in the prior art, testing needs to be carried out in a high-low temperature box and an electromagnetic shielding box in sequence is avoided, the testing efficiency is improved, interference to a testing result in the equipment transferring process is reduced, and continuity and accuracy of data are guaranteed; meanwhile, the control system supports automatic setting and switching of various test working conditions, can comprehensively evaluate the communication stability of the wireless equipment in a complex environment, is suitable for efficient testing of various communication terminals in research and development verification and production quality inspection links, and has the remarkable technical advantages of integrated test process, accurate result and intelligent operation.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic shielding, and particularly to an electromagnetic shielding device for simulating a climate environment. Background Art

[0002] With the wide application of wireless communication technologies, devices such as satellite navigation, smartphones, WI-FI, Bluetooth, smart grid equipment, automotive electronics, drones, and smart homes have put forward higher requirements for the stability and environmental adaptability of wireless communication performance. To ensure that products still have good radio frequency conduction functions in different temperature and humidity environments, strict environmental simulation tests must be carried out on them.

[0003] In related technologies, most testing methods usually use an electromagnetic shielding box and a high and low temperature or constant temperature and humidity test chamber for testing separately. Specifically, testers need to first conduct environmental adaptability tests on the tested products in the high and low temperature chamber, such as aging and evaluation of the operating state under temperature and humidity changes, and then transfer the products to an electromagnetic shielding environment for radio frequency conduction performance testing. This testing method has the following prominent problems: fragmented testing process: environmental adaptability testing and radio frequency conduction testing cannot be continuously completed in the same environment, and the products need to be transferred multiple times, increasing the testing complexity and labor costs; inability to achieve real-time linkage testing: due to the separation of the testing environments, it is difficult to synchronously collect the communication performance parameters of the products in real time during the temperature and humidity changes; the accuracy of the test results is limited: frequent transfers and non-integrated testing processes may introduce environmental disturbances and affect the reliability of the test data; low system integration, unable to meet the development needs of industrial automation. Summary of the Invention

[0004] The main purpose of the present invention is to provide an electromagnetic shielding device for simulating a climate environment to solve the technical problems existing in related technologies.

[0005] To achieve the above object, the present invention provides the following technical solutions: In a first aspect of the present invention, there is provided an electromagnetic shielding device for simulating a climate environment, the electromagnetic shielding device comprising: a housing provided with a signal isolation layer for isolating electromagnetic signals, the signal isolation layer forming a test chamber for placing the wireless device; a control system for generating a temperature control signal and a humidity control signal; a temperature adjustment module for controlling the temperature of the test chamber according to the temperature control signal; a humidity adjustment module for controlling the humidity of the test chamber according to the humidity control signal; The control system is used to detect the radio frequency conduction performance of the wireless device under various preset test conditions, or to cooperate with a shielding test instrument to detect the radio frequency conduction performance of the wireless device under various preset test conditions; each test condition includes temperature and humidity.

[0006] The electromagnetic shielding device for simulating climatic environments of this invention integrates the electromagnetic shielding structure, temperature regulation module, and humidity regulation module into a single housing, forming a closed test chamber. This chamber is then uniformly coordinated by a control system to achieve real-time monitoring of the radio frequency conduction performance of wireless devices under different temperature and humidity conditions. This structure avoids the cumbersome operation of sequentially testing in high-low temperature chambers and electromagnetic shielding chambers, as required by existing technologies. This improves testing efficiency, reduces interference with test results during equipment transfer, and ensures data continuity and accuracy. Simultaneously, the control system supports automatic setting and switching of various test conditions, enabling comprehensive evaluation of the communication stability of wireless devices in complex environments. It is suitable for efficient testing of various communication terminals in R&D verification and production quality inspection stages. Furthermore, by incorporating a position adjustment component, precise and flexible relative position adjustment between the adjustable hinge fixing block and the adjustment seat is achieved. This allows for fine-tuning of the door gap without disassembling the door body, effectively avoiding the low adjustment accuracy and cumbersome operation of existing medium and heavy-duty shielding door hinges. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 A three-dimensional schematic diagram of the electromagnetic shielding device provided in the embodiments of this application; Figure 2 A three-dimensional schematic diagram of an electromagnetic shielding device provided in an embodiment of this application (used to indicate the heating component). Figure 3 A three-dimensional schematic diagram of an electromagnetic shielding device provided in an embodiment of this application (used to indicate the cooling component). Figure 4 A three-dimensional schematic diagram of an electromagnetic shielding device provided in an embodiment of this application (used to indicate a humidity control module); Figure 5 A three-dimensional schematic diagram of an electromagnetic shielding device provided in an embodiment of this application (used to indicate the filter component). Figure 6A three-dimensional schematic diagram of an electromagnetic shielding device provided in an embodiment of this application (used to indicate the power supply system). Figure 7 A three-dimensional schematic diagram of an electromagnetic shielding device provided in an embodiment of this application (used to indicate the control system). Figure 8 This is one of the exploded structural diagrams of the hinge structure in the embodiments of this application; Figure 9 This is the second exploded view of the hinge structure in the embodiments of this application; Figure 10 This is a three-dimensional schematic diagram of the front view of the hinge structure in an embodiment of this application; Figure 11 This is a three-dimensional schematic diagram of the back of the hinge structure in the embodiment of this application; Figure 12 This is the third exploded view of the hinge structure in the embodiments of this application; Figure 13 This is a schematic diagram of the hinge structure installed at the middle angle of the door gap adjustment in an embodiment of this application; Figure 14 This is a schematic diagram of the hinge structure installed at the minimum limit angle of the door gap adjustment in the embodiments of this application; Figure 15 This is a schematic diagram of the hinge structure installed at the maximum limit angle of the door gap adjustment in the embodiments of this application; Figure 16 This is a three-dimensional schematic diagram of the first fan module in an embodiment of this application; Figure 17 for Figure 16 A magnified view of part C in the diagram. Detailed Implementation

[0009] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0010] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0011] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The term "multiple" means two or more, unless otherwise explicitly specified. The term "comprising" indicates the presence of the described feature, whole, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or sets thereof. The term "and / or" describes the relationship between related objects, indicating that three relationships may exist. For example, A and / or B may include three cases: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0012] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art; the terms used in the embodiments of this application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification, claims and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.

[0013] Furthermore, terms such as "exemplary," "for example," and "optional" are used to indicate illustrative purposes. Any technical solution described by the above terms in the embodiments of this application should not be construed as being more preferred or advantageous than other technical solutions. Specifically, these terms are intended to present the relevant technical concepts in terms of specific implementation methods.

[0014] The general testing methods mentioned in the relevant technologies require testing in a controlled temperature environment first, and then transferring the test product to a controlled humidity environment for testing. This results in a fragmented testing process, the inability to continuously complete environmental adaptability testing and RF conduction testing in the same environment (insufficient test accuracy), and the need to transfer the product multiple times (cumbersome testing steps).

[0015] To resolve the above technical issues, please refer to the following in sequence. Figures 1 to 7 This application provides an electromagnetic shielding device that simulates a climatic environment. The device includes a housing, a control system, a temperature control module, and a humidity control module, and is used to test wireless devices. The details are as follows: The housing includes a cabinet and a door positioned opposite it. The door can be opened and closed relative to the cabinet to facilitate the placement of the wireless device under test into the test chamber. The door has an outer casing 160, inside which a door signal isolation layer 140 and a door insulation layer 150 are sequentially arranged. The door also has an observation window 170 for external observation of the interior. The cabinet has an outer casing 130, inside which a cabinet insulation layer 120 and a cabinet signal isolation layer 110 are sequentially arranged. The door signal isolation layer 140 and the cabinet signal isolation layer 110 together constitute a complete signal isolation layer, used to isolate external electromagnetic signals and form a stable shielded environment, thereby forming a test chamber inside the housing for placing the wireless device under test.

[0016] It should be understood that "wireless device" refers to an electronic device with wireless communication capabilities, which can interact with external devices or networks via radio frequency signals. Such wireless devices may include, but are not limited to, mobile communication terminals (such as smartphones and tablets), wearable devices (such as smartwatches and smart bracelets), IoT terminals (such as wireless sensor nodes and smart home controllers), wireless modules (such as Wi-Fi, Bluetooth, and cellular communication modules), and other electronic systems that integrate wireless transmitting / receiving units.

[0017] The control system is located in a predetermined area inside the housing. Its functions include generating temperature and humidity control signals to regulate the internal environmental conditions. The control system also includes data acquisition capabilities, enabling real-time monitoring of the radio frequency conduction performance parameters of the wireless device under various preset test conditions. Alternatively, without data acquisition, the control system can be used in conjunction with shielded testing instruments to detect the radio frequency conduction performance of the wireless device under multiple preset test conditions. Furthermore, the control system can be programmed via a human-machine interface or a remote communication interface. Each test condition simulates various climatic environments, typically including different combinations of temperature and humidity, such as high temperature and high humidity, high temperature and low humidity, low temperature and high humidity, and low temperature and low humidity.

[0018] It should be understood that "shielding testing instruments" usually refer to instruments and equipment used to test the performance of radio frequency, electromagnetic or wireless communication in an electromagnetic shielding environment. Their main feature is that they operate or are used in conjunction with other instruments in a physical environment or structure with shielding function in order to avoid the influence of external electromagnetic interference on the test results.

[0019] The temperature regulation module is located inside the housing and may optionally include a heating component and a cooling component. At least a portion of the heating component is located in a first preset area of ​​the housing and is used to increase the temperature of the test chamber according to the temperature control signal. At least a portion of the cooling component is located in a second preset area of ​​the housing and is used to decrease the temperature of the test chamber according to the temperature control signal.

[0020] The humidity control module is located in another pre-defined area inside the housing. Structurally, it may include a water storage container, an ultrasonic humidifier, and its associated shielding and insulation structure. This module, based on humidity control signals from the control system, alters the humidity within the test chamber through atomized spraying, thereby enabling the testing of the wireless device's performance under different humidity conditions. The shielded and insulated enclosure ensures that the overall electromagnetic shielding performance and thermal balance are not affected during humidity adjustment.

[0021] It should be understood that the control system, temperature regulation module, and humidity regulation module are independently configured and located in different functional areas within the housing to reduce thermal interference, electromagnetic interference, and airflow disturbance between modules. The control system is centrally located in the control area of ​​the housing for easy signal distribution and unified management; the temperature regulation module is positioned in the central area of ​​the heat source and airflow circulation path to improve temperature control response speed and uniformity; and the humidity regulation module is located near the humidifying airflow inlet area to ensure efficient entry of atomized gas into the test chamber without affecting the integrity of the shielding structure. This modular and zoned arrangement effectively improves the system's operational stability, maintainability, and environmental control accuracy.

[0022] During the specific testing process, the control system can sequentially set multiple sets of different temperature and humidity operating parameters according to the preset test program. In conjunction with the electromagnetic shielding environment, the system can collect the radio frequency conduction performance data of the wireless device in real time under each set of operating conditions through the internal detection components and / or external detection components of the electromagnetic shielding device. This includes, but is not limited to, indicators such as signal strength, signal consistency, and response delay, thereby comprehensively evaluating the communication capability and environmental adaptability of the device in complex environments.

[0023] For example, for a 5G communication module under test, its radio frequency conduction performance under different temperature and humidity environments needs to be verified. Using the electromagnetic shielding device of this application embodiment, the tester can preset the following test program in the control system (including operating conditions one to four, and it is a continuous test): Operating Condition 1: Normal Temperature and Humidity The temperature is set to 25℃ and the humidity is set to 50%RH. The system operates for 10 minutes, during which it acquires radio frequency parameters such as signal transmission power, receiving sensitivity, and bit error rate in real time under this environment.

[0024] Operating Condition 2: High Temperature and High Humidity Temperature set to 60℃, humidity set to 90%RH; The steady-state condition was maintained for 20 minutes to detect changes in the stability of the radio frequency signal and the communication quality of the detection module under high temperature and high humidity conditions.

[0025] Operating Condition 3: Low Temperature and Low Humidity Temperature set to -20℃, humidity set to 20%RH; The monitoring period is 15 minutes to check whether the module can start normally and maintain a stable communication link.

[0026] Operating Condition 4: Temperature and Humidity Shock Changes Rapidly switch from low temperature and low humidity (-20℃, 20%RH) to high temperature and high humidity (60℃, 90%RH). The control system uses programming to schedule the temperature and humidity modules to respond quickly, testing the modules' communication recovery capabilities and parameter fluctuations under dynamic environments.

[0027] In each stage, the control system automatically collects the radio frequency conducted performance of the wireless device under test (e.g., communication parameters such as transmit power, receive sensitivity, frequency error, tuning accuracy, and harmonic power), and records the data curves in real time. All data is exported to a host computer or cloud analysis system via a data interface to generate a complete test report. This program realizes an automated closed-loop test process from environmental loading and parameter acquisition to data output, significantly improving test efficiency and system consistency, and fully demonstrating the advantages of the electromagnetic shielding device in multi-condition synchronous radio frequency detection according to the embodiments of this application.

[0028] As can be seen, the electromagnetic shielding device of this application integrates the electromagnetic shielding structure, temperature regulation module, and humidity regulation module into the same housing to form a closed test chamber, which is then uniformly coordinated by the control system to achieve real-time detection of the radio frequency conduction performance of wireless devices under different temperature and humidity environments. This structure avoids the cumbersome operation of conducting tests in high and low temperature chambers and electromagnetic shielding chambers separately in the prior art, improving testing efficiency, reducing interference with test results during equipment transfer, and ensuring the continuity and accuracy of data. At the same time, the control system supports automatic setting and switching of various test conditions, which can comprehensively evaluate the communication stability of wireless devices in complex environments. It is suitable for efficient testing of various communication terminals in the R&D verification and production quality inspection stages, and has significant technical advantages such as integrated testing process, accurate results, and intelligent operation.

[0029] Please see Figure 2 The temperature regulation module includes a heating component for raising the temperature, which includes a heating tube 420, a first fan module 430, and a first motor 440.

[0030] Among them, heating tube 420 is a combination of graphite heating tube and new refrigerant heating tube, set in the preset heating area inside the shell, used to quickly heat the air in the cavity when the control system sends a temperature control signal. The graphite heating tube has the characteristics of fast temperature rise response, high thermal efficiency and long life, and is suitable for precision temperature control applications; the new refrigerant heating tube is used to supplement rapid and balanced heat and improve overall thermal stability.

[0031] In addition, the first fan module 430 is located on the air outlet side of the heating tube and is driven to rotate by the first motor 440. The first motor operates within a motor shielding enclosure 450, which is covered by a motor shielding cover 460 to effectively isolate electromagnetic interference generated during motor operation and ensure that the radio frequency testing environment of the test chamber is not disrupted.

[0032] During operation, the first motor 440 starts according to the control system command, driving the first fan module 430 to rotate, causing the heated airflow to be discharged from the heating tube 420 and delivered to the test chamber, thereby achieving rapid increase and uniform distribution of temperature inside the chamber, ensuring the environmental adaptability test requirements of the wireless device under the preset heating conditions.

[0033] Please see Figure 3 The temperature regulation module also includes a cooling component for reducing the temperature inside the test chamber, which includes a condenser 510, an evaporator 550, a circulation system 520, a waveguide 530, a second fan module 560, and a second motor 570.

[0034] The condenser 510 is located in the heat dissipation area of ​​the casing and is used to cool the refrigerant in the circulation system, changing it from a high-temperature, high-pressure state to a low-temperature, high-pressure state. The evaporator 550 is located near the test chamber and is used to absorb heat from the chamber, thereby reducing the overall temperature of the test chamber.

[0035] The circulation system 520 includes components such as a compressor, refrigerant piping, and solenoid valves. The compressor drives the refrigerant to circulate in a closed loop between the condenser and the evaporator, while the solenoid valves are used to switch the refrigerant flow direction and control the system's operating status, ensuring that the system responds quickly and operates stably.

[0036] Waveguide 530 connects the evaporator outlet and the test chamber inlet, and is used to effectively introduce low-temperature cold air into the test chamber. To achieve efficient delivery and uniform distribution of cold air, a second fan module 560 is provided, which is driven to rotate by a second motor 570 to push the cooling airflow through the waveguide 530 into the test chamber, thereby achieving rapid cooling and airflow circulation inside the test chamber.

[0037] Furthermore, the second motor 570 is housed within a motor shielding enclosure 590 to suppress electromagnetic interference generated during operation and prevent interference with the radio frequency conduction performance testing within the test chamber. The motor shielding enclosure 590 is a metal shielding structure with excellent electromagnetic shielding capabilities; its inner wall can be covered with conductive absorbing material to further enhance the shielding effect. Simultaneously, a power signal filter 580 is connected to the power input terminal of the second motor 570 to filter out high-frequency interference signals from the external power line, preventing external electromagnetic interference from being conducted into the system through the power line. This ensures the stability of the electromagnetic environment and the accuracy of the test data during the testing process.

[0038] Please see Figure 4 The humidity control module is used to regulate the humidity environment inside the test chamber, and includes: a water storage container 610, a humidifier 620, a shielded and insulated box 630, and a shielded and insulated box door 640.

[0039] The water storage container 610 is located within the water storage area of ​​the shell and is used to store the water required for humidification. The humidifier 620 is connected to the water storage container 610 and can be an ultrasonic humidifier. Its function is to atomize the water in the water storage container into fine water particles and introduce them into the test chamber through a conveying structure to regulate the humidity of the chamber and achieve adaptability testing of wireless devices under different environmental conditions.

[0040] The humidifier 620 is located inside the shielded and insulated box 630. The shielded and insulated box 630 is a closed structure made of metal or composite materials. It has an electromagnetic shielding layer and an insulation layer inside, which are used to shield the electromagnetic interference that the humidifier may generate when it is working, and to prevent heat loss during humidification and maintain the stability of the test environment.

[0041] The shielded insulation box door 640 can be rotated and opened relative to the shielded insulation box body 630, which facilitates the inspection and maintenance of the humidifier, while maintaining a good shielding and heat sealing effect.

[0042] Please see Figure 5 The outer surface of the housing is equipped with a filtering component for transmitting signals inside and outside the housing.

[0043] Specifically, the filtering component includes a waveguide hole 230 and a filter 240. The waveguide hole 230 is formed in the housing structure and guides the test signal cable from the outside through the housing into the test cavity, ensuring the integrity and sealing of the mechanical channel during signal introduction. The filter 240 is located at the position of the waveguide hole and is specifically used to perform electromagnetic filtering on the electrical signal transmitted in the signal cable to filter out high-frequency noise signals and prevent external electromagnetic interference signals from being introduced into the test cavity through the signal line, thus ensuring the accuracy of test data and the stability of the communication link.

[0044] In addition, the filter 240 can be installed inside the external shielding enclosure 210. The external shielding enclosure 210 is an independently set metal protective structure with an openable external shielding door 220 on its surface, which facilitates the maintenance, replacement or calibration of the filter. At the same time, it can provide a complete electromagnetic enclosure effect when closed.

[0045] Please see Figure 6 The electromagnetic shielding device also includes a power system installed inside the housing, which includes a power supply box 310, a power supply box door 320, a multi-voltage power supply system 330, and a switching switch 340.

[0046] The power supply enclosure 310 is a closed structure used to house and protect power-related components. The power supply enclosure door 320 is openable and connected to the power supply enclosure 310 for routine inspection and maintenance of the power system.

[0047] The multi-voltage power supply system 330 is located inside the power supply enclosure and supports a multi-voltage power supply range from AC110V 50Hz to AC220V 50Hz. It has adaptive voltage recognition and switching capabilities and can adapt to different power grid environments.

[0048] The changeover switch 340 is used to manually or automatically switch the power input mode, ensuring quick and safe switching between different voltage sources and improving device adaptability.

[0049] Please see Figure 7 The control system of the electromagnetic shielding device includes an electrical control box 710, an electrical control box door 720, control function components 730, a data interface 740, a touch display 750, and function buttons 760.

[0050] The electrical control box 710 is a closed structure used to install and protect the electronic components of the control system; the electrical control box door 720 is located on the electrical control box 710, which is convenient for users to open for module maintenance and function adjustment.

[0051] The control function component 730 is the core of the control system, internally comprising a control module, electrical protection components, a microcomputer control center, a system information acquisition and monitoring center, and an alarm notification center. The control module outputs temperature and humidity control signals, as well as other control signals for the operation of modules such as fans, motors, and heaters. The electrical protection components include overload protection, overvoltage protection, and short-circuit protection to ensure safe system operation. The microcomputer control center executes the test process logic control and parameter settings. The system information acquisition and monitoring center collects real-time data on the operating status of each module and the temperature, humidity, and radio frequency detection data within the test chamber. The alarm notification center issues audible and visual alarm signals when the system malfunctions or exceeds test limits, enhancing system safety.

[0052] It should be noted that the control system may further include at least one of the following: a vector signal analysis module, a signal generation module, a wireless communication integrated test module, a spectrum analysis module, and a radio frequency test module, in order to perform radio frequency conducted function testing on the wireless device.

[0053] The data interface 740 is located on the outside of the control box and is used for data interaction with a host computer, network platform, or industrial system, supporting remote acquisition, uploading, and analysis of test data. The touch display 750 serves as the user's human-machine interface, displaying equipment operating status, test data, test curves, fault information, etc. Function buttons 760 are used for basic control system operations, such as start, stop, and reset, facilitating quick on-site operation.

[0054] Please refer to them in order. Figure 2 , Figures 8 to 16 The electromagnetic shielding device also includes a hinge structure 1.

[0055] The hinge structure 1 connects the door 2A and the cabinet 2B, and mainly includes an adjustable hinge fixing block 10, an adjustment seat 70, a movable hinge block 20, and a position adjustment assembly 100. The specific structure and connection relationship of each component are as follows: The adjusting seat 70 is fixed to one side of the outer surface of the electromagnetic shielding device (generally an outer surface with several mounting holes and close to the door body) by fixing screws 110A, serving as the reference mounting surface for the hinge. The adjustable hinge fixing block 10 is also fixed to one side of the outer surface of the electromagnetic shielding device, located on the side of the adjusting seat 70 away from the electromagnetic shielding device (i.e., roughly on top of the adjusting seat 70), and is connected to the adjusting seat 70 through the position adjusting assembly 100. A clearance opening 13 is also formed in the central area (to provide reserved space for the subsequent insertion of the position adjusting assembly 100). The position adjusting assembly 100 preferably includes adjusting screws, adjusting fixing screws, and corresponding limiting structures to facilitate radial position fixing between the adjustable hinge fixing block 10 and the adjusting seat 70.

[0056] The movable hinge block 20 can be rotatably connected to the adjustable hinge fixing block 10 through hinge components (such as hinge shaft 50, thrust ball bearing 40 and auxiliary washer 30), thereby forming a rotation fulcrum between the shielding door body 2A and the equipment fixing frame. The movable hinge block 20 is used to fix on the door body of the electromagnetic shielding device, and its structure is adapted to the door leaf mounting surface.

[0057] The position adjustment component 100 passes through the through hole 71 on the side of the adjustment seat 70 and is installed in the preset threaded hole 14 on the adjustable hinge fixing block 10 by screwing. The end of its screw forms a surface contact with the positioning surface on the adjustment seat 70. Thus, the operator or installer can use a tool to turn the position adjustment component 100 clockwise or counterclockwise according to the size of the gap between the door 2A and the cabinet 2B. This (pushing or pulling) causes the adjustable hinge fixing block 10 to move radially relative to the adjustment seat 70 along a preset extension direction, thereby adjusting the relative position of the adjustable hinge fixing block 10 and the adjustment seat 70 (see reference here). Figure 13 , Figure 14 and Figure 15 These are the intermediate position, minimum position, and maximum position achieved by adjusting the position adjustment component 100, respectively, to change and adjust the gap between one side of the outer surface and the door body, thereby achieving fine-tuning of the door gap.

[0058] It should be understood that when the position adjustment component 100 (i.e., the adjusting screw) is screwed into the threaded hole of the adjustable hinge fixing block 10, its rotation will cause the screw body to move forward or backward along the axial direction. For example, when the screw is rotated clockwise, the screw shank end 101 of the position adjustment component 100 forms a rigid surface contact with the positioning plate 73 located in the relief opening 13 on the adjustment seat 70, thereby generating a "positive pushing" force. When the screw is rotated counterclockwise, the screw cap end 102 of the position adjustment component 100 forms a rigid surface contact with the force plate 72 on the adjustment seat 70, thereby generating a "reverse pushing" force. Rotating the screw cap 102 clockwise (screw advancing inward): The threaded section enters deeper, and the screw end pushes against the positioning surface of the positioning plate 73, that is, pushing the adjustable hinge fixing block 10 away from the positioning plate 73 of the adjusting seat 70, increasing the gap between the two in the radial direction. Rotating the screw cap 102 counterclockwise (screw retracting): The threaded section retracts, and the screw cap 102 pushes the force plate 72 on the adjusting seat 70 in the opposite direction. With the structural allowance, the adjustable hinge fixing block 10 moves closer to the positioning plate 73 of the adjusting seat 70, decreasing the gap between the two in the radial direction. In short, this mechanism essentially uses the screw as an adjusting force transmission element, and its axial movement drives the adjusted component (adjustable hinge fixing block) to make a slight displacement in a specific direction on the structure (adjusting seat) it contacts, thereby achieving spatial position adjustment.

[0059] As can be seen, the hinge structure of this application embodiment, by setting the position adjustment component 100, enables precise and flexible relative position adjustment between the adjustable hinge fixing block 10 and the adjustment seat 70, thereby allowing for fine-tuning of the door gap without disassembling the door body. This effectively avoids the low adjustment accuracy and cumbersome operation of existing medium and heavy-duty shielding door hinges. While maintaining high load-bearing capacity, this structure can balance the gap between the door leaf and the door frame, ensure electrical continuity, prevent electromagnetic leakage caused by excessive local gaps, and adapt to the installation requirements of multiple hinges working together, significantly improving the assembly efficiency and overall shielding performance of the shielding door.

[0060] It should be noted that the electromagnetic shielding device in this application refers to various electronic information equipment, industrial control equipment, or data security facilities used to suppress or isolate electromagnetic interference. Typical applications include, but are not limited to, shielded cabinets, electromagnetic compatibility test boxes, server compartments, communication base station shielding rooms, power control boxes, and medical equipment housings. These devices are typically constructed with metal shells and equipped with shielding doors that have conductive continuity. A hinge structure is used to control the opening and closing of the door and the shielding gap, ensuring that the overall equipment meets predetermined electromagnetic shielding performance indicators. The hinge structure in this application allows for rapid, precise, and repeatable adjustment of the gap between the door and the equipment frame in practical application scenarios where electromagnetic shielding devices suffer from large door weight, large installation errors, and easy deviation of door gaps. This not only improves the installation adaptability and adjustment efficiency of the door but also effectively ensures the uniformity of the door gap and conductive continuity, thereby significantly improving the shielding performance and long-term stability of the entire electromagnetic shielding system during the electromagnetic shielding process.

[0061] In an optional embodiment of this application, the hinge structure further includes a plurality of pitch adjustment components 120A.

[0062] Specifically, the multiple spacing adjustment components 120A are preferably hexagon socket head cap screws, which are sequentially inserted along the axial direction of the hinge structure, passing through the adjustable hinge fixing block 10 and the adjusting seat 70, and finally fixedly connected to one side of the outer surface of the electromagnetic shielding device. Furthermore, by adjusting the preload of each spacing adjustment component 120A, fine-tuning of the axial spacing between the adjusting seat 70 and one side of the outer surface of the electromagnetic shielding device can be achieved, facilitating the subsequent placement of a corresponding number of shims to adjust the angle between the shielding door and one side of the outer surface of the electromagnetic shielding device.

[0063] In an alternative embodiment, the hinge structure further includes at least one first adjustable hinge pad 80.

[0064] Specifically, the first adjustable hinge shim 80 is located on the side of the adjusting seat 70 near the electromagnetic shielding device and cooperates with multiple spacing adjustment components 120A. By changing the thickness of the shim or increasing or decreasing the number of shims, the spacing between the adjusting seat 70 and the outer surface of the electromagnetic shielding device can be finely adjusted in the axial direction, thereby indirectly affecting the installation angle of the door and achieving the purpose of accurately adjusting the rotation angle between the outer surface and the door. This helps to avoid door sagging or corner dropping caused by the weight of the door or installation errors, and ensures uniform fit and effective contact between the shielding door and the door frame.

[0065] It should be noted that the first adjustable hinge pad 80 also has several first opening structures 81 for installation with the spacing adjustment components 120A (and can be directly clipped onto these spacing adjustment components 120A). Through the opening structures, the pad can be slidably inserted and removed without completely removing the screws, facilitating quick on-site adjustment or replacement of the pad thickness. This allows for flexible adjustment of the axial distance between the adjustment seat and the outer surface of the equipment, improving the fit between the door and the door frame, and preventing corner chipping or uneven gaps.

[0066] In an optional embodiment of this application, the adjusting seat 70 is formed with a plurality of first adjusting cavities 74 extending along its axial direction, and the adjustable hinge fixing block 10 is formed with a plurality of second adjusting cavities 15 extending along its axial direction.

[0067] Specifically, each spacing adjustment component 120A is sequentially inserted along the axial direction of the hinge structure, passing through a corresponding set of second adjustment cavities 15 and first adjustment cavities 74, and is finally fixedly connected to one side of the outer surface of the electromagnetic shielding device. This arrangement allows for axial fine-tuning or limiting between the adjustable hinge fixing block 10 and the adjustment seat 70 within a certain range.

[0068] The second adjustment cavity 15 can be an elongated countersunk hole to accommodate the screw head of the spacing adjustment component 120A, achieving a countersunk fit; the first adjustment cavity 701 can also be an elongated through hole, with its length extending along the axial direction of the adjustment seat 70, so as to allow the spacing adjustment component 120A to slide and adjust within a certain range, further realizing the relative position adjustment between the adjustable hinge fixing block 10 and the adjustment seat 70 in the axial direction.

[0069] Furthermore, the second adjustment cavity 15 and the first adjustment cavity 74 are vertically corresponding in the axial direction, and their radial dimensions are equal, which facilitates the coaxial fit and position maintenance of the adjustment components during through-installation, ensuring the stability and adjustment accuracy of the overall structure.

[0070] In an optional embodiment of this application, the radial dimension of the first adjustment cavity 701 and the radial dimension of the second adjustment cavity 15 are both greater than the diameter of the spacing adjustment assembly 120A.

[0071] Specifically, the radial dimensions of the first adjusting cavity 74 and the second adjusting cavity 15 can be 2 to 3 times the diameter of the spacing adjustment assembly 120A, thereby providing a certain radial movement space for the adjustable hinge fixing block 10 and the adjusting seat 70. For example, when the spacing adjustment assembly 120A is fixed to one side of the outer surface of the electromagnetic shielding device, by rotating the position adjustment assembly 100, the adjustable hinge fixing block 10 and the adjusting seat 70 can be moved relative to each other in the radial direction to change their relative positions, thereby changing the gap size between one side of the outer surface and the door body.

[0072] In an optional embodiment of this application, the adjusting seat 70 is formed with a plurality of first fixing through holes 75 extending along the axial direction.

[0073] Specifically, the first fixing through hole 75 can be a flat-head hole structure to adapt to the installation requirements of the first fixing component such as the internal hexagon flat-head screw, so that the screw head can be fully embedded in the through hole and fit against the end face, thereby avoiding exposure that may affect the installation of the structure or the shielding effect.

[0074] In addition, each first fixing through hole 75 is used to cooperate with a first fixing member (such as an internal hexagonal flat head screw), penetrates the adjusting seat 70 and forms a threaded connection with the threaded hole on the outer surface of the electromagnetic shielding device, so as to realize the axial positioning and fixing of the adjusting seat 70 on one side of the outer surface.

[0075] In an optional embodiment of this application, the movable hinge block 20 is provided with a plurality of second fixing through holes 26 extending along its axial direction.

[0076] Specifically, the second fixing through hole 26 can be a countersunk hole structure to accommodate the installation requirements of second fasteners such as hexagon socket head cap screws, ensuring that the screw head can be recessed into the hole, keeping the surface flat, and avoiding protrusion that could affect the door's closing or shielding performance.

[0077] Accordingly, the multiple second fixing through holes 26 are respectively engaged with a second fixing member 130A (e.g., an internal hexagonal head screw), that is, the second fixing member passes through the movable hinge block 20 and forms a threaded connection with the threaded hole or nut assembly on the door body of the electromagnetic shielding device, thereby realizing the stable installation of the movable hinge block 20.

[0078] In an optional embodiment of this application, the hinge structure further includes at least one second adjustable hinge pad 90.

[0079] Specifically, the second adjustable hinge shim 90 is located on the side of the movable hinge block 20 near the door body and is installed in conjunction with multiple second fixing parts 130A. By increasing or decreasing the number of shims, the axial distance between the movable hinge block 20 and the door body can be adjusted, thereby effectively controlling the angle of the door body relative to the adjustment seat after closing. This helps to avoid door sagging or corner dropping caused by the weight of the door or installation errors, ensuring uniform fit and effective contact between the shielded door and the door frame, and achieving the purpose of fine-tuning the rotation angle between one side of the outer surface and the door body, further improving the uniformity of the gap and the consistency of conductive contact between the door leaf and the door frame.

[0080] It should be noted that the second adjustable hinge washer 90 also has several second opening structures 91 for installation with multiple second fasteners 130A (and can be directly snapped onto these fasteners). Through the opening structures, the washer can be slidably inserted and removed without completely removing the screws, facilitating quick on-site adjustment or replacement of the washer thickness. This allows for flexible adjustment of the axial distance between the adjusting seat and the outer surface of the equipment, improving the fit between the door and the door frame, and preventing corner chipping or uneven gaps.

[0081] In an optional embodiment of this application, the hinge structure further includes a hinge assembly 50.

[0082] Specifically, the hinge assembly 50 can be a hinge shaft, used to pass through the adjustable hinge fixed block 10 and the movable hinge block 20, so that the two form a rotatable connection. With the hinge assembly 50, the adjustable hinge fixed block 10 and the movable hinge block 20 are movably connected through the hinge assembly, realizing the rotatable opening or closing of the door relative to one side of the outer surface of the equipment, thereby completing the opening and closing action of the shielded door.

[0083] In an alternative embodiment, the adjustable hinge fixing block 10 forms a first hinge portion, and the movable hinge block 20 forms a second hinge portion, the first hinge portion being hinged to the second hinge portion via a hinge assembly 50.

[0084] The first hinge portion has a first hinge through hole 11 and a second hinge through hole 12. Correspondingly, the second hinge portion has a third hinge through hole 21, a fourth hinge through hole 22, and a fifth hinge through hole 23. The above-mentioned hinge through holes are distributed along the axial direction and arranged correspondingly to each other. In this way, the hinge shaft can pass through the above-mentioned hinge through holes to form a through-type hinge connection, thereby forming a rotatable engagement between the adjustable hinge fixing block 10 and the movable hinge block 20.

[0085] Optionally, the hinge assembly 50 may also have a first groove 51 and a second groove 52 formed on its surface or in its middle section, for axial positioning and mating assembly with the auxiliary gasket 30 and the thrust ball bearing 40, respectively. This structural design not only effectively reduces friction and wear during the hinge process but also improves the coaxiality and stability of the rotating connection, ensuring smooth operation and structural reliability during the opening and closing of the shielded door.

[0086] Meanwhile, the second hinge also forms a grommet threaded hole, which is used to complete the mating installation with the grommet screw 60.

[0087] Specifically, the screws 60 can be screwed into the corresponding threaded holes from both sides of the movable hinge block 20, and form contact and lock with the hinge assembly 50 (such as the hinge shaft), thereby achieving axial positioning and fixation of the hinge shaft. Through the above structural design, axial movement or loosening of the hinge shaft during operation can be effectively prevented, further improving the safety and reliability of the entire hinge structure and ensuring the long-term stable operation of medium and heavy-duty shielding doors under frequent opening and closing conditions.

[0088] Please see Figure 15 This application also provides an electromagnetic shielding device 2, which includes an electromagnetic shielding cabinet, a door 2A, and multiple hinge structures 1, wherein the multiple hinge structures 1 are connected between the electromagnetic shielding cabinet and the door.

[0089] Specifically, one end of hinge structure 1 is fixed to the hinge reference mounting surface of the electromagnetic shielding cabinet, and the other end is fixed to the door body 2A. Through the above-mentioned multiple hinge structures, the stable load-bearing capacity and multi-point synchronous adjustment of the medium and heavy-duty door body can be achieved, effectively improving the uniformity of the gap and the continuity of conductivity when the shielding door is closed, thereby ensuring the overall shielding performance and reliability of the electromagnetic shielding device.

[0090] Each hinge structure is equipped with a position adjustment component 100, which is connected to the adjustable hinge fixing block via a threaded engagement. The screw end of the component makes surface contact with the two positioning surfaces of the adjustment seat. Furthermore, the adjustment components on different hinges have the same structure and uniform arrangement, allowing multiple adjustment components to be operated simultaneously for synchronous adjustment when the door is closed. This enables synchronous gap control of multiple hinges, eliminating uneven fit caused by gravity deformation or installation errors.

[0091] Please see Figures 16 to 17 The first fan module 430 can be an externally shielded fan module structure, which mainly includes: a silent fan 4301, a ventilation waveguide window 4302, a feedthrough capacitor 4303, a PCB adapter board 4304, a sheet metal cover 4305, and a conductive cotton strip 4306.

[0092] A silent fan 4301 is fixedly installed on the outside of the ventilation waveguide window 4302 for forced heat dissipation of the test chamber or internal components. The ventilation waveguide window 4302 is installed on the housing wall of the electromagnetic shielding device, serving as an airflow channel while also having an electromagnetic leakage suppression structure to ensure the shielding integrity of the ventilation area.

[0093] To enable external power supply for the fan without compromising overall shielding performance, the fan's two power cables are connected to the 2-pin connector on the PCB adapter board 4304 via quick-connect fittings. The PCB adapter board 4304 and the feedthrough capacitor 4303 are securely connected by soldering. During installation, the feedthrough capacitor 4303 has a conductive cotton strip 4306 at its bottom to enhance the grounding shielding effect between it and the ventilation waveguide window 4302.

[0094] A feedthrough capacitor 4303 penetrates the ventilation waveguide window 4302 and is secured by tapping and locking, allowing external power signals to couple into the interior while suppressing the conduction and leakage of high-frequency interference signals. The PCB adapter board connects again to the feedthrough capacitor inside the device, completing the complete transfer path for the fan power supply cable from the outside to the inside. Finally, a sheet metal cover 4305 seals the entire fan module, ensuring an aesthetically pleasing, compact, and highly safe design, avoiding potential electrical risks associated with exposed fan wires.

[0095] The first fan module 430 solves the problems of exposed cables, unsightly appearance, and safety hazards caused by traditional external power supply for fans. At the same time, through the cooperation of the through-core capacitor and the shielding grounding structure, it ensures that the integrity of the shielding environment is not damaged during the fan power supply process, effectively avoiding the impact of external electromagnetic interference on the radio frequency conduction performance in the test cavity, improving the overall test accuracy and environmental reliability of the electromagnetic shielding device, and is suitable for test scenarios with long-term operation, high temperature requirements, and sensitivity to radio frequency signals.

[0096] This application also provides a testing method for testing wireless devices using the aforementioned electromagnetic shielding device. Specifically, it includes the following steps: S1: The wireless device under test is placed inside an electromagnetic shielding device, which includes a shell for forming a test cavity, an electromagnetic signal isolation structure, a temperature regulation module, a humidity regulation module, and a control system. S2: Set multiple sets of test condition parameters through the control system. Each set of test conditions includes temperature and humidity parameters, and sets the test duration and detection frequency. S3: The control system sequentially schedules the temperature regulation module and humidity regulation module, adjusts the environmental conditions inside the test chamber in real time according to the test conditions, and triggers the detection process after each condition stabilizes. S4: Under each test condition, invoke the detection component set inside the electromagnetic shielding device and / or connect an external radio frequency detection device to collect the radio frequency conduction performance parameters of the wireless device. The parameters include, but are not limited to, transmit power, receive sensitivity, frequency error, modulation accuracy, harmonic power and response delay. S5: The control system processes and analyzes the collected data in real time, and exports all data to an external system through the data interface to generate a test report; S6: When there is a dynamic testing requirement, the control system executes the temperature and humidity change test process, quickly switches from the first set of working conditions to the second set of working conditions within a set time, and collects the radio frequency performance change data during the working condition switching process to evaluate the communication stability and response capability of the wireless device during environmental changes.

[0097] The test method is an automated closed-loop control process that can continuously perform environmental simulation and radio frequency testing under multiple operating conditions without human intervention. It is suitable for environmental adaptability performance evaluation of various types of communication terminals or modules.

[0098] The specific embodiments of the invention have been described in detail above, but these are merely examples, and the invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the invention are also within the scope of this invention. Therefore, all equivalent transformations, modifications, and improvements made without departing from the spirit and principles of this invention should be covered within the scope of this invention.

Claims

1. An electromagnetic shielding device simulating a climatic environment, characterized in that, The electromagnetic shielding device includes: The housing is provided with a signal isolation layer for isolating electromagnetic signals, and the signal isolation layer forms a test cavity for placing the wireless device. The control system is used to generate temperature control signals and humidity control signals; A temperature regulation module is used to control the temperature of the test chamber according to the temperature control signal; A humidity control module is used to control the humidity of the test chamber according to the humidity control signal; The control system is used to detect the radio frequency conduction performance of the wireless device under various preset test conditions, or to cooperate with a shielding test instrument to detect the radio frequency conduction performance of the wireless device under various preset test conditions; each test condition includes temperature and humidity.

2. The electromagnetic shielding device as described in claim 1, characterized in that, The temperature regulation module includes a heating component and a cooling component; At least a portion of the heating component is disposed in a first preset area of ​​the housing and is used to increase the temperature of the test chamber according to the temperature control signal; At least a portion of the cooling component is disposed in a second preset region of the housing and is used to reduce the temperature of the test chamber according to the temperature control signal.

3. The electromagnetic shielding device as described in claim 2, characterized in that, The heating component includes a heating element, a first fan module, and a first motor; The heating element is used to raise the temperature according to the temperature control signal, and the first motor is used to drive the first fan module to bring the heated airflow into the test chamber to increase the temperature of the test chamber.

4. The electromagnetic shielding device as described in claim 2, characterized in that, The cooling component includes: A condenser is used to cool the refrigerant. An evaporator is used to absorb heat to lower the temperature inside the test chamber. A circulation system is used to drive the refrigerant to circulate between the condenser and the evaporator; Waveguide, used to guide the flow of cold air into the test chamber; Second fan module, The second motor is used to drive the second fan module to allow the cooled airflow to enter the test chamber, thereby reducing the temperature of the test chamber.

5. The electromagnetic shielding device as described in claim 2, characterized in that, The humidity control module includes: Water storage container, used to store humidification water; A humidifier is configured to be connected to the water storage container and to atomize the water in the water storage container and introduce it into the test chamber. The shielded and insulated box contains a humidifier, which is used to shield electromagnetic signals and maintain a stable thermal environment during humidification. The shielded insulated box door can rotate relative to the cabinet body.

6. The electromagnetic shielding device as described in claim 1, characterized in that, The outer surface of the housing is provided with a filtering component for realizing the transmission of signals inside and outside the housing; The filtering component includes: A waveguide hole is provided to guide test signal cables through the housing. A filter is used to perform electromagnetic filtering on the electrical signals transmitted by the signal cable.

7. The electromagnetic shielding device as described in claim 2, characterized in that, The housing includes: The door body has a built-in door signal isolation layer and door insulation layer; The cabinet has a built-in insulation layer and a signal isolation layer. The door can rotate relative to the cabinet.

8. The electromagnetic shielding device as described in claim 7, characterized in that, The electromagnetic shielding device also includes a hinge structure; The hinge structure connects the door and the cabinet. The hinge structure includes an adjustable hinge fixing block, an adjustment seat, a movable hinge block, and a position adjustment component. Both the adjusting seat and the adjustable hinge fixing block are used to fix the cabinet body; The adjustable hinge fixing block is connected to the adjusting seat through the position adjusting component and is located on the side of the adjusting seat away from the electromagnetic shielding device; The adjustable hinge fixing block is rotatably connected to the movable hinge block, and the movable hinge block is used to fix it to the door body; The position adjustment component is used to adjust the relative position of the adjustable hinge fixing block and the adjustment seat to change the gap between the cabinet and the door.

9. The electromagnetic shielding device as described in claim 8, characterized in that, The hinge structure also includes multiple pitch adjustment components; Multiple of the aforementioned spacing adjustment components pass sequentially along the axial direction through the adjustable hinge fixing block and the adjustment seat, and are fixed on one side of the outer surface of the electromagnetic shielding device; The spacing adjustment component is used to adjust the spacing between the adjustable hinge fixing block and the adjusting seat in the axial direction.

10. The electromagnetic shielding device as described in claim 9, characterized in that, The hinge structure also includes at least one first adjustable hinge pad; The first adjustable hinge pad is disposed on the side of the adjusting seat near the electromagnetic shielding device and is used to cooperate with the plurality of the spacing adjustment components to adjust the spacing between the adjusting seat and one side of the outer surface in the axial direction, so as to adjust the rotation angle between one side of the outer surface and the door body.

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