High-efficiency interference-free radiation emission test field measurement and control device and method

Abstract

The invention discloses a high-efficiency interference-free radiation emission test field measurement and control device and method, and the device comprises a field measurement and control terminal which is disposed in a semi-anechoic chamber and is held or worn by a tester; the on-site measurement and control terminal integrates a man-machine interaction unit and a data processing and display unit. And the radio frequency interference-free communication platform is used for constructing a two-way communication link between the test system and the control system and comprises a radio frequency interference-free communication unit, a low-leakage transmission network, a communication gateway, a test instrument group and a link state monitoring and safety braking module. On the premise of strictly maintaining radio frequency silence of a test environment, a tester is allowed to stay in a safe activity area in the darkroom in the whole process, and real-time setting and adjustment of parameters of a test instrument, real-time control of a test process and real-time monitoring of test data are realized; and a tester is supported to carry out field dynamic adjustment and optimization on the test equipment or the object to be tested based on real-time data feedback.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic compatibility testing technology, specifically to a highly efficient and interference-free measurement and control device and method that allows test personnel to remain on-site and perform measurement and control operations in real time in an electromagnetic radiation emission test environment that maintains radio frequency silence. It is particularly suitable for electromagnetic radiation emission test scenarios with low radiation levels and high efficiency requirements. Background Technology

[0002] In the field of electromagnetic compatibility (EMC) testing, electromagnetic radiated emission testing is a key project for assessing the level of electromagnetic interference unintentionally emitted by electronic and electrical equipment. For highly sensitive test scenarios, such as certification testing for extremely low radiation levels, high-precision electromagnetic environment simulation, or antenna / RCS measurement, maintaining absolute radio frequency (RF) silence in the test environment is crucial. Any introduced external or internal RF interference signals can contaminate measurement results, leading to data distortion, test failure, or even misjudgment. Therefore, to meet RF silence requirements, standard radiated emission test architectures strictly employ spatial isolation design: the test room (such as a semi-anechoic chamber) housing the device under test (EUT), receiving antenna, and auxiliary equipment is physically separated from the control room housing spectrum analyzers, receivers, signal generators, and other test instruments and programmable controllers. While this isolation effectively shields the tests from noise from the control room equipment, it also introduces significant bottlenecks in operational efficiency and limits testing flexibility. Firstly, frequent personnel movement and test interruptions lead to low experimental efficiency. During testing, personnel often need to repeatedly adjust and optimize the EUT status (e.g., cable layout, partial shielding), test equipment (e.g., antenna height, polarization, position), or instrument parameters based on preliminary test results or observed phenomena. Under the isolated architecture, personnel must repeatedly enter and exit the anechoic chamber and control room—operating instruments in the control room and adjusting the physical components in the anechoic chamber. Each entry and exit requires cumbersome door opening / closing operations (potentially introducing momentary interference), waiting for the anechoic chamber environment to stabilize (especially for low-level tests), and is accompanied by frequent test interruptions and restarts. This results in the entire testing process being fragmented into disjointed segments, leading to extremely low efficiency, especially during complex tests with multiple rounds and configurations. Secondly, the lack of real-time observation and immediate adjustment is a significant issue. Once the test starts in the control room, the testing personnel, being in the control room, cannot directly and in real-time observe changes in the physical state of the EUT (such as cable resonance, radiation changes caused by component heating) or transient test phenomena within the anechoic chamber. When anomalies are detected or optimization is needed, adjustments cannot be made immediately during the test; the test must be stopped, the personnel must enter the anechoic chamber to check and adjust, and then return to the control room to restart the test. This delayed feedback and separation of operation severely hinders the rapid diagnosis and dynamic optimization of complex electromagnetic problems, making it difficult to form an efficient "measurement-analysis-adjustment-remeasurement" closed loop.

[0003] Existing "field" control solutions provide wired controllers for use in anechoic chambers (typically connected to instruments in the control room via low-RF leakage fiber optic cables). However, this approach has significant drawbacks. First, the range of movement is severely limited, requiring test personnel to drag finite-length fiber optic cables, confining their activity to a narrow area. For large devices under test (such as cabinets or vehicles), personnel cannot freely access the back or sides to adjust cables or perform shielding operations, severely restricting testing flexibility. Second, there are operational inconveniences and safety hazards. The anechoic chamber environment is dimly lit and densely packed with equipment, making it easy for dragged fiber optic cables to become entangled in turntable supports, antenna tracks, or devices under test cables. This can not only cause communication interruptions but also pose safety hazards such as tripping over personnel or pulling on instruments.

[0004] Therefore, the field of electromagnetic radiation emission testing urgently needs an innovative solution that simultaneously satisfies both absolute radio frequency silence in the testing environment and the flexibility and safety of real-time on-site monitoring and control by test personnel. Meeting these requirements will change the traditional phased and frequently interrupted testing mode, enabling efficient, continuous, and dynamically optimized on-site closed-loop monitoring and control, significantly improving testing efficiency and accuracy. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a highly efficient and interference-free on-site measurement and control device and method for radiated emission testing. Under the premise of strictly maintaining radio frequency silence in the test environment, it allows test personnel to stay in a safe activity area in the dark room throughout the entire process, realizes real-time setting and adjustment of test instrument parameters, real-time control of the test process, real-time monitoring of test data, and supports test personnel to make on-site dynamic adjustments and optimizations to the test equipment or the test object based on real-time data feedback.

[0006] The objective of this invention is achieved through the following technical solution: a highly efficient and interference-free on-site measurement and control device for radiated emission tests, comprising:

[0007] Includes: testing system, field measurement and control terminal, and radio frequency interference-free communication platform;

[0008] The testing system includes testing equipment located in the control room, and a test object and receiving antenna located inside the semi-anechoic chamber. The receiving antenna is used to receive radiated emission signals inside the semi-anechoic chamber and is connected to the testing equipment. The testing equipment is connected to a radio frequency interference-free communication platform located in the control room.

[0009] Preferably, the receiving antenna is connected to the test equipment via a communication cable passing through the side wall of the semi-anechoic chamber, and the test equipment is directly connected to the radio frequency interference-free communication platform via a communication cable.

[0010] The on-site measurement and control terminal is deployed inside a semi-anechoic chamber and is handheld or worn by testing personnel. This terminal integrates a human-machine interface unit and a data processing and display unit. The human-machine interface unit (such as a touchscreen, buttons, etc.) is used to receive control commands input by personnel (parameter settings, process control); the data processing and display unit is used to receive, process, and display key data from the testing instruments in real time (such as spectrum diagrams, measurement readings, status information).

[0011] Radio Frequency Interference-Free Communication Platform: This platform establishes a two-way communication link between the test system and the control system, including a radio frequency interference-free communication unit, a low-leakage transmission network, a communication gateway, and a link status monitoring and safety braking module. A radio frequency interference-free communication unit is deployed in an anechoic chamber, establishing a reliable two-way radio frequency interference-free air interface communication link with the field measurement and control terminal. A low-leakage transmission network connects the radio frequency interference-free communication unit in the anechoic chamber to the communication gateway located in the external control room. This network uses low-leakage physical media (such as optical fiber, shielded twisted pair) to transmit signals, ensuring electromagnetic sealing at the boundary of the anechoic chamber. The communication gateway is deployed in the external control room, serving as a protocol conversion and data routing center, and connects to the low-leakage transmission network local area network. The test equipment is deployed in the external control room, including the equipment required for performing radiated emission tests (such as spectrum analyzer, measurement receiver, signal source, programmable host, etc.), and is connected to the local area network where the communication gateway is located via Ethernet or other buses (such as GPIB / USB to Ethernet). The link status monitoring and safety braking module is integrated into the system software (which can be distributed in the field measurement and control terminal software and / or test instrument control software) to monitor the status of the radio frequency interference-free communication link (such as connectivity, signal quality) in real time. Preferably, this module implements a "heartbeat" mechanism and presets a link interruption response threshold. When a link interruption exceeding a threshold is detected, a safety braking mechanism is automatically triggered (such as pausing / terminating the test, setting the instrument's safety status, and saving data) to ensure test safety and data integrity. This communication platform effectively overcomes the shortcomings of traditional testing through the following innovative designs: First, the use of radio frequency-free wireless communication technology completely eliminates the physical constraints of optical fibers, allowing test personnel to move freely within a safe area, solving the problem of limited activity range in traditional solutions; second, through distributed deployment of communication units and intelligent link monitoring, the safety hazards of easily tangled and broken optical fibers are eliminated, while a "heartbeat" mechanism ensures that any communication interruption can be quickly detected and automatically trigger protective measures; third, the dual low-leakage design (radio frequency-free air interface + shielded transmission network) strictly guarantees radio frequency silence in the test environment; finally, the fully bidirectional real-time communication link supports instant adjustment of test parameters and real-time data feedback, transforming the traditional test process that requires repeated interruptions into a continuous and efficient closed-loop optimization process, significantly improving test efficiency.

[0012] Preferably, the on-site measurement and control device for radiated emission testing further includes an excitation system located in the control room. The excitation system is connected to the object under test via a communication cable passing through the side wall of the semi-anechoic chamber; it is used to provide signal excitation when the object under test requires signal excitation; the excitation system is a signal source.

[0013] A highly efficient and interference-free on-site measurement and control method for radiated emission tests, based on the above-mentioned device, includes the following steps:

[0014] Step S1, System Initialization and Personnel Detention: Complete the physical connection of the system, power on the equipment, and initialize the software. Test personnel carry the field monitoring terminal into the anechoic chamber and remain within the pre-defined safe activity area throughout the process. Preferably, this activity area surrounds the object under test (also known as the test object), with a radius of not less than 1.0 meter, ensuring personnel safety and allowing flexible access to the object under test. Initiate link status monitoring.

[0015] Step S2, Real-time On-Site Command Issuance (Uplink): In the anechoic chamber, the test personnel use the human-machine interface of the on-site control terminal to set or modify the parameters of the test equipment (instrument) in real time (such as center frequency, sweep width, resolution bandwidth, reference level, attenuator settings, etc.). The test personnel also send real-time test process control commands (such as start scanning, pause measurement, switch test standards / frequency bands, save data) through the on-site control terminal. These commands are transmitted to the external test instrument for execution via a radio frequency interference-free uplink communication link (on-site control terminal – indoor access point – low-leakage network – communication gateway – test instrument).

[0016] Step S3, Real-time Data Monitoring (Downlink): Key data generated by the test instrument (real-time spectrum, amplitude / frequency readings, limit comparison results, instrument status information) is transmitted in real-time to the field control terminal in the anechoic chamber via a radio frequency interference-free downlink communication link (test instrument – ​​communication gateway – low-leakage network – indoor access point – field control terminal). Test personnel can view the data on the display screen in real-time and perform immediate analysis.

[0017] Step S4: On-site dynamic adjustments based on real-time feedback: Based on the data displayed in real-time on the on-site monitoring terminal, and combined with the observed state of the device under test (DUT) or test phenomena directly in the darkroom, the test personnel make minor adjustments to the DUT within the safe activity area during the test (without interrupting the test). These adjustments include: adjusting the DUT's state, connecting or disconnecting the DUT from the excitation equipment, and locally applying / removing shielding materials. The DUT may consist of multiple components and internal cables; adjustments may involve slightly moving the internal cable positions or slightly moving the components of the DUT. The test equipment is also adjusted (e.g., fine-tuning the height, polarization direction, and horizontal / vertical position of the receiving antenna). These adjustments aim to optimize the test status, resolve discovered problems, or explore better configurations.

[0018] Step S5, Closed-Loop Test Execution: Steps 2-4 form an efficient "measurement – ​​real-time on-site analysis – immediate on-site adjustment – ​​re-measurement" closed loop. Test personnel can make decisions and take actions based on the latest data and observations without leaving the darkroom or interrupting the testing process, significantly accelerating the optimization process.

[0019] 6. Test Termination and Safety Handling: When the test is completed or needs to be actively stopped, the tester sends a "Terminate" command through the on-site monitoring terminal. During test execution (steps 3-5), if the link status monitoring module detects that the communication link interruption exceeds the preset safety threshold, it automatically triggers a safety brake, forcibly pausing or terminating the test to protect the equipment and data. After the link is restored, the test can be continued or restarted as appropriate.

[0020] The beneficial effects of this invention are: 1. Strictly ensuring the radio frequency silence of the test environment: The core communication link adopts a non-radio frequency radiation technology, which completely eliminates the possibility of polluting the test environment due to the introduction of control signals, and ensures the absolute accuracy of low-level radiation measurement and high-precision simulation.

[0021] 2. Breakthrough on-site closed-loop measurement and control capabilities: Test personnel remain in the darkroom throughout the entire process, moving freely within a safe area to operate instruments in real time, view data instantly, and adjust the test object or equipment on-site based on real-time feedback. This truly achieves a highly efficient on-site closed loop of "measurement-analysis-adjustment-remeasurement," greatly enhancing test insight and optimization speed.

[0022] 3. Significantly improves testing efficiency: By eliminating test interruptions and enabling real-time control and dynamic adjustment within the environment, the testing process, which originally required phased and repeatedly interrupted steps, is integrated into a continuous and smooth operation. This significantly reduces the time consumed in a single test cycle.

[0023] 4. Completely eliminates spatial constraints and safety hazards: Wireless communication expands the radius of personnel's activities to the entire circumference of the EUT, supports multi-angle operation, and eliminates the risk of dragging cables in dark rooms, thus preventing entanglement and tripping. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the device principle of the present invention;

[0025] Figure 2 This is a schematic diagram of a highly efficient and interference-free on-site measurement and control device for radiated emission tests based on visible light communication (VLC).

[0026] Figure 3 This is a top view of the efficient and interference-free on-site measurement and control device for radiated emission testing based on VLC, located in the control room and test room.

[0027] Figure 4 This is a top view of the test room of a highly efficient and interference-free on-site measurement and control device for radiated emission tests based on VLC. Detailed Implementation

[0028] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0029] like Figure 1 As shown, a highly efficient and interference-free on-site measurement and control device for radiated emission tests includes:

[0030] Includes: testing system, field measurement and control terminal, and radio frequency interference-free communication platform;

[0031] The testing system includes testing equipment located in the control room, and a test object and receiving antenna located inside the semi-anechoic chamber. The receiving antenna is used to receive radiated emission signals inside the semi-anechoic chamber and is connected to the testing equipment. The testing equipment is connected to a radio frequency interference-free communication platform located in the control room.

[0032] The field measurement and control terminal is deployed inside a semi-anechoic chamber and establishes communication with a radio frequency interference-free communication platform. It is handheld or worn by test personnel. The field measurement and control terminal integrates a human-computer interaction unit and a data processing and display unit.

[0033] The radio frequency interference-free communication platform is used to build a two-way communication link between the test system and the field measurement and control terminal, including a radio frequency interference-free communication unit, a low leakage transmission network, a communication gateway, and a link status monitoring and safety braking module.

[0034] A highly efficient and interference-free on-site measurement and control method for radiated emission tests includes the following steps:

[0035] Step S1. System initialization: Set up the efficient and interference-free radiated emission test field measurement and control device, power on all equipment, start the test instrument (test equipment) control program and field measurement and control terminal software; test personnel carry the field measurement and control terminal into the anechoic chamber and stay in the preset safe activity area throughout the process, and start link status monitoring;

[0036] Step S2. Real-time on-site command issuance: In the darkroom, the test personnel set or modified the test instrument parameters in real time through the human-machine interface of the on-site measurement and control terminal;

[0037] Testers send test process control commands in real time through the on-site measurement and control terminal;

[0038] The above parameters or instructions are transmitted to the external test instrument for execution via an uplink communication link free from radio frequency interference; the uplink communication link is composed of a field control terminal, an indoor access point, a low-leakage network, a communication gateway, and the test instrument in sequence.

[0039] S3. Real-time on-site data monitoring: Key data generated by the testing instruments is transmitted back in real-time to the on-site measurement and control terminal in the anechoic chamber via a radio frequency interference-free downlink communication link. Testing personnel can view the data on the display screen on-site in real time and perform immediate analysis.

[0040] The downlink communication link is composed of test instruments, communication gateways, low-leakage networks, indoor access points, and field monitoring and control terminals transmitted sequentially.

[0041] S4. On-site dynamic adjustment based on real-time feedback: Based on the data displayed in real time on the on-site measurement and control terminal, and combined with the state of the test object or test phenomena directly observed in the dark room, the test personnel make fine adjustments to the test object and the test equipment within the safe activity area during the test.

[0042] S5. Repeat steps S2 to S4. Testers do not need to leave the darkroom or interrupt the test process. They can make decisions and take actions based on the latest data and observations to accelerate the test optimization process.

[0043] If the link status monitoring module detects that the communication link interruption exceeds the preset safety threshold, it will automatically trigger the safety brake, forcibly suspend or terminate the test to protect the equipment and data; after the link is restored, you can choose to continue or restart the test.

[0044] S6. Test Termination and Safety Procedures: When the test is completed or needs to be stopped actively, the tester sends a "termination" command through the on-site monitoring and control terminal to complete the test.

[0045] In the embodiments of this application, visible light communication (VLC) technology is used as an example to realize the "efficient and interference-free on-site electromagnetic radiation emission measurement and control method and device".

[0046] I. System Setup (e.g.) Figure 2 As shown in the figure, 1: Test equipment (instrument); 2: Programmable host; 3: Router / switch; 4: Visible light transmitter; 5: Object under test.

[0047] Step 1: Arrange the Object Under Test (EUT), receiving antenna, turntable (if any), and grounding plane in a semi-anechoic chamber (test room) according to standards (e.g., GJB151B). Reserve a safe area for test personnel to move around the EUT. Preferably, this area is a circular area with a radius R ≥ 1.0m centered on the geometric center of the EUT (e.g., [missing information]). Figure 3 (As shown). This area should be free of obstructions to ensure safe movement of personnel and access to the EUT for necessary operations (such as cable management, partial shielding).

[0048] Step 2: Set up test instruments such as spectrum analyzers, measurement receivers, signal generators, and programmable controllers in the external control room, and form a local area network through an Ethernet switch / router.

[0049] Step 3: Calculate the minimum circumscribed circle radius R2 of the safe activity area and the minimum circumscribed circle radius R1 of the EUT core area (determined based on the EUT dimensions). Select a high-brightness VLC transmitter with a specific emission angle θ (preferably, emission angle θ ≥ 60°). The VLC receiver integrated into the field monitoring terminal (e.g., tablet computer) has a specific field of view (FOV) (preferably, FOV ≥ 70°).

[0050] Step 4: Determine the installation height H of the VLC transmitter and the typical operating height h of the VLC receiver (fixed behind the operator, e.g., 1.2m-1.5m). The following geometric constraints must be met during installation:

[0051]

[0052] This inequality ensures that at the outermost edge of the safe activity zone (R2), the angle between the VLC transmitter and receiver is less than min(θ, FOV), guaranteeing signal reception. Near the center of the EUT (R1), this angle is not too large, preventing signal saturation or link instability due to excessive incident angle. Coefficients 1.1 and 0.9 represent engineering margins to account for installation errors and variations in personnel posture. The optical axis center of the VLC transmitter must be precisely aligned with the geometric center of the radiated emission test platform (e.g., ...). Figure 4(As shown). VLC transmitters are preferably uniformly distributed and deployed on the ceiling of the anechoic chamber. For large anechoic chambers or complex layouts, coverage simulation or field testing is required to ensure that there are no communication blind spots in the entire safe activity area (especially critical operating points where personnel may stay). Multiple transmitters should be used to avoid co-channel interference (e.g., using time division, frequency division, or code division). This step completely eliminates physical cable constraints through VLC wireless communication, allowing test personnel to move freely within the safe activity area (radius ≥ 1.0 meter). Compared to fiber optic solutions, the activity range is expanded to cover the entire circumference of the EUT, allowing personnel to walk around to the back of the EUT to adjust cables or observe radiation hotspots at close range, without the risk of cable entanglement. The distributed deployment of VLC transmitters on the ceiling ensures that personnel can maintain communication from any location, overcoming the "test blind spot" problem caused by fixed fiber optic access points.

[0053] Step 5: Select an industrial-grade ruggedized tablet PC as the field measurement and control terminal. Run customized software on it, providing functions such as instrument control GUI, real-time data display (spectrum graph, readings), status monitoring, and link management. The VLC receiver module is integrated into the top shell of the tablet PC, with the receiving surface facing upwards. The receiving surface must be significantly higher than the ground reference plane (GRP) or the turntable surface to avoid obstruction of the optical path by cables, EUT, or the turntable.

[0054] Step Six: The VLC transmitter located in the anechoic chamber is connected via low-RF leakage fiber optic cable, which penetrates the shielding wall of the anechoic chamber and connects to the central Ethernet switch / router located in the external control room.

[0055] Step 7: The test instrument group is also connected to the same central switch / router via Ethernet (or GPIB / USB to Ethernet adapter) to form a unified local area network.

[0056] Step 8: Implement coordinated link monitoring in the field control terminal software and the test instrument control program (running on the main control unit itself). The specific heartbeat mechanism is as follows: the field control terminal software periodically (e.g., every 100ms) sends a "heartbeat" UDP packet containing a unique ID and timestamp to the test instrument control program. The test instrument control program continuously listens for heartbeat packets. A critical link interruption response time threshold t is preset. The value of t is set according to the test security requirements, typically ranging from 2 to 10 seconds (e.g., a smaller value, such as 2s, for high-power or sensitive tests, and a larger value, such as 10s, for low-risk scans). If the test instrument control program does not receive any valid heartbeat packets within a continuous duration t, it determines that a sudden communication link interruption has occurred. At this time, the control program immediately and automatically executes the following safety measures: sends an emergency stop command to all relevant test instruments, forcibly pauses or terminates the current scanning / measurement process, puts the test instruments into a safe state (turns off the RF output of the signal source, sets the receiver input port to high attenuation, stops the turntable movement), and saves all currently acquired test data. Compared to traditional fiber optic solutions, this method achieves proactive safety monitoring through a "heartbeat" mechanism. In fiber optic solutions, physical cable breaks or loose interfaces may lead to unannounced communication interruptions. However, this system automatically triggers a safety brake when the link interruption exceeds a threshold t, preventing the loss of test data due to sudden interruptions or accidental obstructions.

[0057] II. Execution of On-site Closed-Loop Monitoring and Control Procedures

[0058] Step 1: System Initialization. Complete all hardware connections as described in the system setup section. Power on all devices and start the test instrument control program and the field monitoring and control terminal software. Confirm network connectivity; the field monitoring and control terminal should be able to receive initial status information from the control program via the VLC link.

[0059] Step 2: The test personnel carry the powered-on field monitoring terminal into the anechoic chamber. The test instrument control program automatically enters the link monitoring state and begins to check the heartbeat signal.

[0060] Step 3: In the darkroom, personnel set test parameters in real time via the touchscreen interface of the on-site monitoring and control terminal: center frequency (e.g., 1GHz), sweep width (e.g., 100MHz), resolution bandwidth (RBW, e.g., 100kHz), video bandwidth (VBW), reference level, attenuator value, detector type (e.g., Peak, QP), limit lines, etc. After setting, personnel issue a "start scan" command through the terminal interface. The control program parses the command and drives the spectrum analyzer / receiver to execute the preset scan program.

[0061] Step Four: The real-time spectrum graph, amplitude readings, and limit comparison results acquired by the spectrum analyzer / receiver are transmitted downlink through the control program, switch, fiber optic cable, and VLC transmitter to the VLC receiver at the on-site monitoring and control terminal, and displayed in real time on the terminal screen. Personnel in the darkroom, combining the real-time spectrum graph / readings on the screen with visual observation of the EUT, dynamically adjust the EUT on-site. This includes, within a safe area, slightly moving the location of suspicious cables, adjusting the power supply or load of auxiliary equipment (such as fans), applying copper foil or ferrite rings locally for shielding tests, and rotating the EUT (if small and safe to do so manually). Simultaneously, on-site dynamic adjustments to the test equipment can be made via commands, such as fine-tuning the height of the receiving antenna (within the allowable range of the support frame), changing the antenna polarization direction (horizontal / vertical), and slightly moving the antenna position along the track (to find the point of maximum radiation).

[0062] Step 5: After several on-site adjustments to achieve a satisfactory testing state or complete all configuration tests, personnel issue a "Stop Test" or "Save Data and Stop" command via the terminal. The testing instrument will then safely stop, and the final data will be saved.

[0063] Step Six: During test execution, if a momentary VLC link interruption occurs (e.g., personnel facing away from the transmitter causing the receiver to be blocked by their head, rapid turning causing loss of lock, or briefly entering the coverage edge), personnel should, without touching the EUT or critical equipment and ensuring their own safety, immediately attempt to slightly move their position or adjust their body / terminal orientation (e.g., take a few steps back, slightly raise their head, or turn to the side) to re-establish a valid optical path connection within the time threshold t. If the internal beat recovers within time t, the control program will detect this and the test can automatically continue or prompt the personnel for confirmation before continuing, without requiring a complete interruption and restart. If the interruption continues beyond time t (e.g., personnel accidentally leaving the activity area causing prolonged obstruction or equipment malfunction), the safety braking mechanism will automatically trigger, and the test will be forcibly stopped safely. After confirming the environment is safe in the anechoic chamber, personnel can attempt to troubleshoot (e.g., check the terminal power supply, reset the receiver module), or carefully move the terminal to a better position. After troubleshooting or adjusting the position, the personnel must manually confirm the reset alarm and safety status in the control program, and then restart the test.

[0064] While VLC is the preferred option, the “RF interference-free communication link” can also be implemented using other technologies, such as infrared communication (IR), but its link power must be verified to be harmless to the human body; or acoustic communication (ultrasound), but the system needs to verify the impact of noise introduced during the testing process on the communication.

[0065] The foregoing description illustrates and describes a preferred embodiment of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A highly efficient and interference-free on-site measurement and control device for radiated emission tests, characterized in that: include: Test system, field measurement and control terminal, and radio frequency interference-free communication platform; The testing system includes testing equipment located in the control room, and a test object and receiving antenna located inside the semi-anechoic chamber. The receiving antenna is used to receive radiated emission signals inside the semi-anechoic chamber and is connected to the testing equipment. The testing equipment is connected to a radio frequency interference-free communication platform located in the control room. The field measurement and control terminal is deployed inside a semi-anechoic chamber and establishes communication with a radio frequency interference-free communication platform. It is handheld or worn by test personnel. The field measurement and control terminal integrates a human-computer interaction unit and a data processing and display unit. The radio frequency interference-free communication platform is used to build a two-way communication link between the test system and the field measurement and control terminal, including a radio frequency interference-free communication unit, a low leakage transmission network, a communication gateway, and a link status monitoring and safety braking module.

2. The efficient and interference-free on-site measurement and control device for radiated emission tests according to claim 1, characterized in that: The receiving antenna is connected to the test equipment via a communication cable passing through the side wall of the semi-anechoic chamber. The test equipment is directly connected to the radio frequency interference-free communication platform via a communication cable.

3. The efficient and interference-free on-site measurement and control device for radiated emission tests according to claim 1, characterized in that: The on-site measurement and control device for the radiated emission test also includes an excitation system located in the control room. The excitation system is connected to the object under test via a communication cable that passes through the side wall of the semi-anechoic chamber. It is used to provide signal excitation when the object under test needs signal excitation; the excitation system is a signal source.

4. The efficient and interference-free on-site measurement and control device for radiated emission tests according to claim 1, characterized in that: The human-computer interaction unit includes a touch screen and buttons, and is used to receive control commands input by personnel. The control commands include parameter setting commands and process control commands. The data processing and display unit is used to receive, process, and display key data from the testing instrument in real time, including spectrum, measurement readings, and status information.

5. The efficient and interference-free on-site measurement and control device for radiated emission tests according to claim 1, characterized in that: The radio frequency interference-free communication unit is deployed in an anechoic chamber and establishes a two-way radio frequency interference-free air interface communication link with the field measurement and control terminal. The low-leakage transmission network connects the radio frequency interference-free communication unit in the anechoic chamber to the communication gateway located in the external control room. The network uses a low-radio frequency leakage physical medium to transmit signals, ensuring electromagnetic sealing at the boundary of the anechoic chamber. The communication gateway is deployed in the external control room, serving as a protocol conversion and data routing center, connecting the low-leakage transmission network and the local area network; the test equipment accesses the local area network where the communication gateway is located via Ethernet or GPIB / USB to Ethernet. The link status monitoring and safety braking module is integrated into the platform system software and is used to monitor the status of the bidirectional radio frequency interference-free air interface communication link in real time. The module implements a "heartbeat" mechanism and presets a link interruption response threshold. When a link interruption is detected to exceed the threshold, a safety braking is automatically triggered to ensure test safety and data integrity. The safety braking includes pausing / terminating the test, setting the instrument safety status, and saving the data.

6. A highly efficient and interference-free on-site measurement and control method for radiated emission tests, based on the device described in any one of claims 1 to 5, characterized in that: Includes the following steps: Step S1. System initialization: Set up the efficient and interference-free radiated emission test field measurement and control device, power on all equipment, and start the test equipment control program and field measurement and control terminal software; Test personnel carried the on-site monitoring and control terminal into the anechoic chamber and remained in the pre-designated safe activity area throughout the process, and started link status monitoring; Step S2. Real-time on-site command issuance: In the darkroom, the test personnel set or modified the test equipment parameters in real time through the human-machine interface of the on-site measurement and control terminal; Testers send test process control commands in real time through the on-site measurement and control terminal; The above parameters or instructions are transmitted to external test instruments for execution via an uplink communication link free from radio frequency interference; the uplink communication link is composed of a field control terminal, an indoor access point, a low-leakage network, a communication gateway, and test equipment transmitted sequentially. S3. Real-time on-site data monitoring: Key data generated by the test equipment is transmitted back to the on-site measurement and control terminal in the anechoic chamber in real time via a downlink communication link free from radio frequency interference. Test personnel can view the data on the display screen on-site in real time and perform instant analysis. The downlink communication link is composed of test equipment, communication gateway, low leakage network, indoor access point, and field measurement and control terminal in sequence; S4. On-site dynamic adjustment based on real-time feedback: Based on the data displayed in real time on the on-site measurement and control terminal, and combined with the state of the test object or test phenomena directly observed in the dark room, the test personnel make fine adjustments to the test object and the test equipment within the safe activity area during the test. S5. Repeat steps S2 to S4. Testers do not need to leave the darkroom or interrupt the testing process. They can make decisions and take actions based on the latest data and observations to accelerate the test optimization process. If the link status monitoring module detects that the communication link interruption exceeds the preset safety threshold, it will automatically trigger the safety brake, forcibly suspend or terminate the test to protect the equipment and data; after the link is restored, you can choose to continue or restart the test. S6. Test Termination and Safety Procedures: When the test is completed or needs to be stopped actively, the tester sends a "termination" command through the on-site monitoring and control terminal to complete the test.

7. The efficient and interference-free on-site measurement and control method for radiated emission tests according to claim 6, characterized in that: The pre-defined safe activity area surrounds the object to be tested and has a radius of not less than 1.0 meter.

8. The efficient and interference-free on-site measurement and control method for radiated emission tests according to claim 6, characterized in that: The test equipment parameters include center frequency, sweep width, resolution bandwidth, reference level, and attenuator settings; the test process control commands include start scanning, pause measurement, switch test standards / frequency bands, and save data.

9. The efficient and interference-free on-site measurement and control method for radiated emission tests according to claim 6, characterized in that: The key data includes real-time spectrum, amplitude / frequency readings, limit comparison results, and instrument status information.

10. The efficient and interference-free on-site measurement and control method for radiated emission tests according to claim 6, characterized in that: The fine-tuning of the test object includes adjusting the state of the test object, connecting or disconnecting the test object from the excitation device, and locally applying / removing shielding material. The adjustment of the test equipment includes: adjusting the height, polarization direction, and horizontal / vertical position of the receiving antenna.

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