Method and system for evaluating safety margin of distributed interconnection system based on double mixing chambers

Abstract

The invention belongs to the technical field of electromagnetic compatibility, and discloses a distributed interconnection system safety margin assessment method and system based on double mixing chambers. The method comprises the following steps: testing the distributed interconnection system by adopting double mixing chambers to obtain sensitive threshold combination information of the distributed interconnection system, drawing a safety margin combination curve according to the sensitive threshold combination information, and determining the safety margin of the distributed interconnection system according to the safety margin combination curve and a preset safety margin standard. Whether the distributed interconnection system meets the safety margin requirement or not is evaluated and judged. According to the method, the safety margin of the distributed interconnection system can be evaluated more accurately, subsystems with different anti-electromagnetic interference capacities can be protected better, it is ensured that some subsystems cannot be damaged in the evaluation process, and the accuracy and safety of evaluating the safety margin of the distributed interconnection system are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic compatibility, and more specifically, relates to a method and system for evaluating the safety margin of a distributed interconnection system based on a dual mixing chamber. Background Art

[0002] As distributed interconnected systems composed of multiple electronic devices (subsystems) become more and more complex, traditional safety margin assessment based on a single mixing chamber is gradually unable to simulate the electromagnetic environment in which the equipment is located. Distributed interconnected systems are composed of multiple subsystems (usually including two subsystems, respectively denoted as subsystem A and subsystem B) and connecting cables (i.e., interconnection cables). Due to factors such as functional requirements or space limitations, multiple subsystems in a distributed interconnected system may be placed in different electromagnetic environments and connected by interconnection cables.

[0003] At present, the safety margin assessment scheme for distributed interconnected systems only uses one mixing chamber, and the test method adopted is also to evaluate the safety margin of each subsystem separately, and then take the minimum safety margin of all subsystems in the same frequency band to represent the safety margin of the interconnected system. For example, subsystem A is placed in an electromagnetic environment, while subsystem B is not in an electromagnetic environment. Under this condition, the safety margin of subsystem A is tested. This scheme may overestimate the safety margin of the interconnected system because it cannot simulate the electromagnetic environment of the distributed interconnected system in actual use. In addition, since different subsystems have different anti-electromagnetic interference capabilities, if different subsystems are evaluated and tested using the same mixing chamber, some subsystems may be damaged during the evaluation process. How to accurately simulate the electromagnetic environment in which the distributed interconnected system is actually working to accurately evaluate the safety margin of the distributed interconnected system, and how to ensure that the subsystem will not be damaged during the evaluation process are issues that are of concern and need to be resolved in this field. Summary of the invention

[0004] The present invention provides a method and system for evaluating the safety margin of a distributed interconnected system based on a dual mixing chamber, thereby solving the problem in the prior art that the accuracy and safety of evaluating the safety margin of a distributed interconnected system need to be improved.

[0005] The present invention provides a method for evaluating the safety margin of a distributed interconnected system based on a dual mixing chamber, comprising the following steps:

[0006] The distributed interconnection system is tested using a dual-wave mixing chamber to obtain the sensitive threshold combination information of the distributed interconnection system;

[0007] A safety margin combination curve is obtained by drawing according to the sensitive threshold combination information;

[0008] Based on the safety margin combination curve and the preset safety margin standard, an assessment is made as to whether the distributed interconnected system meets the safety margin requirements.

[0009] Preferably, when a dual mixing chamber is used to test the distributed interconnection system, the initial field strength of the first mixing chamber in the dual mixing chamber is set to a first allowable response value corresponding to the first subsystem in the distributed interconnection system, and the initial field strength of the second mixing chamber is set to a second allowable response value corresponding to the second subsystem;

[0010] The field strength of the first mixing chamber and / or the second mixing chamber is adjusted, and the sensitive threshold combination data of the distributed interconnected system after each adjustment is obtained through testing, wherein the sensitive threshold combination data includes the sensitive thresholds corresponding to the two subsystems respectively; and the sensitive threshold combination information is obtained after multiple adjustment tests.

[0011] Preferably, there is a difference between the first allowable response value and the second allowable response value; during the process of adjusting the field strength of the first mixing chamber and / or the second mixing chamber, the relationship between the field strengths of the two mixing chambers is kept unchanged.

[0012] Preferably, when dual mixing chambers are used to test the distributed interconnection system, both mixing chambers adopt a stepping working mode; the field strength of the mixing chamber is adjusted by adjusting the stirrers in the mixing chambers to different stepping positions.

[0013] Preferably, obtaining a safety margin combination curve according to the sensitive threshold combination information comprises the following sub-steps:

[0014] Calculate the safety margin combination corresponding to each sensitive threshold combination in combination with the field strength of the mixing room where each subsystem is located;

[0015] The safety margin combination curve is drawn according to multiple groups of safety margin combinations.

[0016] Preferably, the safety margin of each subsystem is calculated using the following formula:

[0017]

[0018] Where M is the safety margin, E S is the sensitivity threshold of the subsystem, E V It is the field strength of the mixing room where the subsystem is located.

[0019] Preferably, the preset safety margin standard includes a first safety margin threshold corresponding to the first subsystem and a second safety margin threshold corresponding to the second subsystem in the distributed interconnected system; when evaluating and judging whether the distributed interconnected system meets the safety margin requirements, the safety margin combination diagram is divided into regions according to the safety margin thresholds of the two subsystems, and the region where the safety margin of the first subsystem is greater than the first safety margin threshold and the safety margin of the second subsystem is greater than the second safety margin threshold is taken as the first region; if the safety margin combination curve is in the first region, it is determined that the distributed interconnected system meets the safety margin requirements; otherwise, it is determined that the distributed interconnected system does not meet the safety margin requirements.

[0020] Preferably, after determining that the distributed interconnected system meets the safety margin requirement, the method further includes: obtaining a safety margin combination that meets the safety margin requirement based on a section of the safety margin combination curve in the first area.

[0021] On the other hand, the present invention provides a distributed interconnection system safety margin evaluation system based on dual mixing chambers, comprising: a test system and a calculation evaluation system;

[0022] The test system comprises a dual-wave mixing chamber and a test unit, and the test system is used to test the distributed interconnection system using the dual-wave mixing chamber to obtain sensitive threshold combination information of the distributed interconnection system;

[0023] The calculation and evaluation system is used to draw a safety margin combination curve according to the sensitive threshold combination information, and to evaluate and judge whether the distributed interconnected system meets the safety margin requirement according to the safety margin combination curve and a preset safety margin standard;

[0024] The dual-mixing chamber-based distributed interconnection system safety margin evaluation system is used to execute the steps in the dual-mixing chamber-based distributed interconnection system safety margin evaluation method.

[0025] Preferably, the dual mixing chamber includes a receiving antenna, a transmitting antenna, a stirrer and a drive control unit; the test unit includes a signal source, a power amplifier, a directional coupler, a power meter, a spectrum analyzer and a test control and data acquisition unit; the stirrer is connected to the drive control unit, the drive control unit, the spectrum analyzer, the power meter and the signal source are all connected to the test control and data acquisition unit, the signal source, the power amplifier, the directional coupler and the transmitting antenna are connected in sequence, the power meter is connected to the directional coupler, and the receiving antenna is connected to the spectrum analyzer.

[0026] One or more technical solutions provided in the present invention have at least the following technical effects or advantages:

[0027] The present invention uses a dual mixing chamber when evaluating the safety margin of a distributed interconnected system. The dual mixing chamber can simultaneously place two subsystems in different electromagnetic environments, thereby more accurately simulating the electromagnetic environment in which the distributed interconnected system is located, thereby more accurately evaluating the safety margin of the distributed interconnected system. In addition, in view of the fact that the anti-electromagnetic interference capabilities of different subsystems are usually different, using a dual mixing chamber to evaluate and test different subsystems can better protect subsystems with different anti-electromagnetic interference capabilities and ensure that certain subsystems will not be damaged during the evaluation process. The present invention adopts a test method that is not used in the prior art. On the basis of this test method, the present invention further draws a safety margin combination curve to represent the safety margin of the distributed interconnected system in the form of a combination diagram. It can judge whether the distributed interconnected system meets the safety margin requirements and give a safety margin combination according to the position of the combination curve, which has practical engineering application significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a dual-mixing chamber in a method for evaluating safety margin of a distributed interconnected system based on a dual-mixing chamber provided in Embodiment 1 of the present invention;

[0029] Figure 2 It is a schematic diagram of the sensitive threshold combination of the distributed interconnected system;

[0030] Figure 3 It is a schematic diagram of the safety margin combination of the distributed interconnected system;

[0031] Figure 4 A flowchart of a method for evaluating safety margin of a distributed interconnected system based on a dual mixing chamber provided in Example 1 of the present invention;

[0032] Figure 5 A schematic diagram of a test system used to evaluate the safety margin of a distributed interconnected system;

[0033] Figure 6 It is a test diagram for the sensitivity threshold combination of distributed interconnected systems;

[0034] Figure 7 This is a combined test diagram for the safety margin of distributed interconnected systems.

[0035] Among them, 1-first signal source, 2-first power amplifier, 3-first directional coupler, 4-first power meter, 5-second signal source, 6-second power amplifier, 7-second directional coupler, 8-second power meter, 9-spectrum analyzer, 10-first stirrer, 11-second stirrer, 12-third stirrer, 13-first transmitting antenna, 14-second transmitting antenna. DETAILED DESCRIPTION

[0036] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] The distributed interconnected system in the present invention can be found in Figure 1 , Figure 1 The subsystem A and subsystem B are placed in the working spaces of the first reverberation chamber (i.e., reverberation chamber 1) and the second reverberation chamber (i.e., reverberation chamber 2) respectively, and the fast response phenomenon of the distributed interconnected system in the evaluation process is ignored.

[0038] Embodiment 1:

[0039] Embodiment 1 provides a method for evaluating the safety margin of a distributed interconnection system based on a dual mixing chamber, see Figure 4 , including the following steps:

[0040] Step 1: Use a dual mixing chamber to test the distributed interconnection system and obtain the sensitive threshold combination information of the distributed interconnection system.

[0041] Wherein, when a dual mixing chamber is used to test a distributed interconnection system, the initial field strength of the first mixing chamber in the dual mixing chamber is set to a first allowable response value corresponding to a first subsystem in the distributed interconnection system, and the initial field strength of the second mixing chamber is set to a second allowable response value corresponding to a second subsystem; the field strength of the first mixing chamber and / or the second mixing chamber is adjusted, and sensitive threshold combination data of the distributed interconnection system after each adjustment is obtained through testing, and the sensitive threshold combination data includes sensitive thresholds corresponding to the two subsystems respectively; and the sensitive threshold combination information is obtained after multiple adjustment tests.

[0042] There is a difference between the first allowable response value and the second allowable response value; during the process of adjusting the field strength of the first mixing chamber and / or the second mixing chamber, the relationship between the field strengths of the two mixing chambers is kept unchanged.

[0043] When a dual mixing chamber is used to test a distributed interconnection system, both mixing chambers can adopt a stepping working mode; the field strength of the mixing chamber is adjusted by adjusting the stirrers in the mixing chamber to different stepping positions.

[0044] The diagram of the sensitive threshold combination of the distributed interconnected system is shown in Figure 2 That is, step 1 sets the initial field strength of the two mixing chambers to the allowable response values ​​E of subsystem A and subsystem B respectively. VA 、E VB Then, the field strength of the two mixing rooms is continuously adjusted to test the sensitive threshold combination E1+E2 of the distributed interconnection system. The field strength combination of the two mixing rooms is adjusted in this way to test the sensitive threshold.

[0045] Step 2: Draw a safety margin combination curve based on the sensitive threshold combination information.

[0046] Specifically, step 2 includes the following sub-steps:

[0047] Step 201: Calculate the safety margin combination corresponding to each sensitive threshold combination in combination with the field strength of the mixing room where each subsystem is located.

[0048] The safety margin of each subsystem is calculated using the following formula:

[0049]

[0050] Where M is the safety margin, E S is the sensitivity threshold of the subsystem, E V It is the field strength of the mixing room where the subsystem is located.

[0051] Step 202: Draw the safety margin combination curve according to multiple safety margin combinations.

[0052] It can be understood that step 2 combines the allowable response value of the electromagnetic environment of each subsystem to calculate the safety margin combination corresponding to each sensitive threshold combination in step 1, and draws a safety margin combination curve. Different curves represent different frequency points (for example, they can be recorded as f1 and f2 respectively). A certain safety margin combination is that the safety margin of subsystem A is M1, and the safety margin of subsystem B is M2. See Figure 3 .

[0053] Step 3: Based on the safety margin combination curve and the preset safety margin standard, assess and determine whether the distributed interconnected system meets the safety margin requirements.

[0054] Specifically, the preset safety margin standard includes a first safety margin threshold corresponding to the first subsystem and a second safety margin threshold corresponding to the second subsystem in the distributed interconnected system; when evaluating and judging whether the distributed interconnected system meets the safety margin requirements, the safety margin combination diagram is divided into regions according to the safety margin thresholds of the two subsystems, and the region where the safety margin of the first subsystem is greater than the first safety margin threshold and the safety margin of the second subsystem is greater than the second safety margin threshold is taken as the first region; if the safety margin combination curve is in the first region, it is determined that the distributed interconnected system meets the safety margin requirements; otherwise, it is determined that the distributed interconnected system does not meet the safety margin requirements.

[0055] In addition, after determining that the distributed interconnected system meets the safety margin requirement, the method may further include: obtaining a safety margin combination that meets the safety margin requirement based on a section of the safety margin combination curve in the first area.

[0056] When the curve is in the first region, it indicates that subsystem A and subsystem B can simultaneously meet their respective safety margin requirements, that is, the entire distributed interconnected system meets the safety margin requirements. That is, step 3 determines whether the interconnected system meets the safety margin requirements based on the position of the curve relative to the safety margin requirements in the figure. If the curve is in the first region, the safety margin requirements are met and a safety margin combination is given, otherwise it is considered that the safety margin requirements are not met.

[0057] In summary, from a testing perspective, the present invention is a test result obtained when multiple subsystems of the entire distributed interconnected system are simultaneously in their respective electromagnetic environments. Compared with the traditional solution of testing the safety margin of each subsystem separately and then taking the lowest value as the safety margin of the entire system, the present invention adopts a completely different testing method. The present invention can more accurately simulate the electromagnetic environment in which the distributed interconnected system is located, thereby being able to more accurately evaluate the safety margin of the distributed interconnected system.

[0058] For example, in the traditional test scheme, subsystem A is in an electromagnetic environment, and the test shows that the safety margin of subsystem A is 6dB. At this time, subsystem B is not in the electromagnetic environment, and this result meets the requirements; but if a dual mixing chamber is used for testing, that is, subsystem A is in an electromagnetic environment and subsystem B is also in an electromagnetic environment, at this time, because subsystem B receives interference, the safety margin of subsystem A may be less than 6dB, that is, it does not meet the margin requirements. Therefore, the traditional test method cannot accurately simulate the electromagnetic environment in which the interconnected system is located, and the test results may not be accurate. On the other hand, assuming that the electric field strength that subsystem A can withstand is 100V / m, and the electric field strength that subsystem B can withstand is 10V / m, because the subsystems have different anti-electromagnetic interference capabilities, if A and B are placed in a mixing chamber for testing at the same time, they may be damaged. The present invention uses a dual mixing chamber to solve the problems existing in the above-mentioned traditional test methods.

[0059] In addition, based on the test method proposed in the present invention, the present invention also proposes a test result representation method for this test method, which is specifically represented by a combination curve and a combination diagram. It can judge whether the distributed interconnected system meets the safety margin requirements according to the position of the combination curve and give a safety margin combination, which has practical engineering application significance.

[0060] Below Figure 5 The distributed interconnected system (i.e., simulated interconnected system) shown in FIG. 1 is taken as an example to illustrate the safety margin assessment.

[0061] Two frequency points of 400 MHz and 1 GHz are selected for evaluation. When the response value of the simulated interconnection system reaches 19.2 dBm, the simulated interconnection system is considered sensitive. Assume that for subsystem A, the allowable response value of its electromagnetic environment is 50 V / m, and for subsystem B, the allowable response value of its electromagnetic environment is 10 V / m. The safety margin requirements for both subsystem A and subsystem B are 6 dB.

[0062] Test the sensitivity threshold of the simulated interconnection system. When testing the sensitivity threshold, the number of step positions of the stirrer is set to 25. Taking 1 GHz as an example, the reverberation chamber 1 first forms a field strength of 50 V / m, and the reverberation chamber 2 forms a field strength of 10 V / m. Gradually increase the field strengths of the reverberation chamber 1 and the reverberation chamber 2, and the first set of sensitivity threshold combinations obtained is "305 + 15". Continuously adjust the field strengths of the two reverberation chambers to obtain the sensitivity threshold combinations shown in Table 1.

[0063] For example, the specific situation for obtaining the first set of sensitivity threshold combinations of "305 + 15" is to first increase the field strength of the reverberation chamber 1 to 310. At this time, the field strength of the reverberation chamber 2 is still 10. At this time, the system becomes sensitive. So, reduce the field strength of the reverberation chamber 1 to 305. At this time, the system is not sensitive. Then increase the field strength of the reverberation chamber 2 to 15, and the system is not sensitive. However, if the field strength of the reverberation chamber 2 is continuously increased, the system will become sensitive. Therefore, the first set of sensitivity threshold combinations is "305 + 15".

[0064] Table 1 1 GHz Sensitivity Threshold Combinations

[0065] Subsystem A sensitivity threshold (V / m) Subsystem B sensitivity threshold (V / m) 305 15 300 20 290 25 285 30 280 40 275 45 270 50 265 55 260 60 255 65 250 70 245 75

[0066] Draw the sensitivity threshold diagram of the simulated interconnection system according to the data in Table 1, as Figure 6 shown.

[0067] According to the sensitivity threshold test results, substitute them into the calculation formula of the safety margin to calculate the safety margins of subsystem A and subsystem B respectively, and then obtain the safety margin combination diagram of the interconnection system, as Figure 7 shown.

[0068] According to the safety margin requirements of subsystem A and subsystem B, Figure 7 is divided into four regions, corresponding to Figure 3 the first region to the fourth region in Figure 7 respectively. The curve of 1 GHz is in the second region when 300 V / m < E1 < 305 V / m and 15 V / m < E2 < 20 V / m, which does not meet the margin requirements, corresponding to Figure 7 the blue curve in Figure 7Therefore, it is considered that the simulated interconnected system does not meet the safety margin requirements.

[0069] Embodiment 2:

[0070] Embodiment 2 provides a distributed interconnection system safety margin evaluation system based on dual mixing chambers, including: a test system and a calculation evaluation system.

[0071] The test system comprises a dual-wave mixing chamber and a test unit. The test system is used to test a distributed interconnection system by using the dual-wave mixing chamber to obtain sensitive threshold combination information of the distributed interconnection system.

[0072] Among them, see Figure 5 The double mixing chamber includes a receiving antenna, a transmitting antenna (including a first transmitting antenna 13 and a second transmitting antenna 14), a stirrer (including a first stirrer 10, a second stirrer 11 and a third stirrer 12) and a drive control unit; the test unit includes a signal source (including a first signal source 1 and a second signal source 5), a power amplifier (including a first power amplifier 2 and a second power amplifier 6), a directional coupler (including a first directional coupler 3 and a second directional coupler 7), a power meter (including a first power meter 4 and a second power meter 8), a spectrum analyzer 9 and a test control and data acquisition unit; the stirrer is connected to the drive control unit, the drive control unit, the spectrum analyzer 9, the power meter, and the signal source are all connected to the test control and data acquisition unit, the signal source, the power amplifier, the directional coupler, and the transmitting antenna are connected in sequence, the power meter is connected to the directional coupler, and the receiving antenna is connected to the spectrum analyzer 9. Specifically, the first signal source 1, the first power amplifier 2, the first directional coupler 3, and the first transmitting antenna 13 are connected in sequence, and the first power meter 4 is connected to the first directional coupler 3; the second signal source 5, the second power amplifier 6, the second directional coupler 7, and the second transmitting antenna 14 are connected in sequence, and the second power meter 8 is connected to the second directional coupler 7.

[0073] The calculation and evaluation system is used to draw a safety margin combination curve according to the sensitive threshold combination information, and to evaluate and judge whether the distributed interconnected system meets the safety margin requirements according to the safety margin combination curve and a preset safety margin standard.

[0074] The system for evaluating the safety margin of a distributed interconnected system based on dual mixing chambers provided in Example 2 is used to execute the steps in the method for evaluating the safety margin of a distributed interconnected system based on dual mixing chambers as described in Example 1.

[0075] Since the functions of the components in the evaluation system provided in Example 2 correspond to the steps in the evaluation method provided in Example 1, Example 2 can be understood by referring to the description of Example 1, which will not be repeated here.

[0076] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for evaluating the safety margin of a distributed interconnection system based on a dual mixing chamber, characterized in that: The following steps are involved: The distributed interconnection system is tested using a dual-wave mixing chamber to obtain the sensitive threshold combination information of the distributed interconnection system; A safety margin combination curve is obtained by drawing according to the sensitive threshold combination information; Based on the safety margin combination curve and the preset safety margin standard, an assessment is made as to whether the distributed interconnected system meets the safety margin requirements.

2. The method for evaluating the safety margin of a distributed interconnection system based on dual mixing chambers according to claim 1 is characterized in that: When a dual-wave mixing chamber is used to test a distributed interconnection system, the initial field strength of the first wave mixing chamber in the dual-wave mixing chamber is set to a first allowable response value corresponding to a first subsystem in the distributed interconnection system, and the initial field strength of the second wave mixing chamber is set to a second allowable response value corresponding to a second subsystem; Adjusting the field strength of the first mixing chamber and / or the second mixing chamber, and testing to obtain the sensitivity threshold combination data of the distributed interconnection system after each adjustment, wherein the sensitivity threshold combination data includes the sensitivity thresholds corresponding to the two subsystems respectively; The sensitive threshold combination information is obtained after multiple adjustment tests.

3. The method for evaluating the safety margin of a distributed interconnection system based on dual mixing chambers according to claim 2 is characterized in that: There is a difference between the first allowable response value and the second allowable response value; during the process of adjusting the field strength of the first mixing chamber and / or the second mixing chamber, the relationship between the field strengths of the two mixing chambers is kept unchanged.

4. The method for evaluating safety margin of a distributed interconnection system based on dual mixing chambers according to claim 2 is characterized in that: When a dual mixing chamber is used to test a distributed interconnection system, both mixing chambers adopt a stepping working mode; the field strength of the mixing chamber is adjusted by adjusting the stirrers in the mixing chamber to different stepping positions.

5. The method for evaluating safety margin of a distributed interconnection system based on dual mixing chambers according to claim 2 is characterized in that: Drawing a safety margin combination curve according to the sensitive threshold combination information includes the following sub-steps: Calculate the safety margin combination corresponding to each sensitive threshold combination in combination with the field strength of the mixing room where each subsystem is located; The safety margin combination curve is drawn according to multiple groups of safety margin combinations.

6. The method for evaluating safety margin of a distributed interconnection system based on dual mixing chambers according to claim 5 is characterized in that: The safety margin of each subsystem is calculated using the following formula: Where M is the safety margin, E S is the sensitivity threshold of the subsystem, E V It is the field strength of the mixing room where the subsystem is located.

7. The method for evaluating safety margin of a distributed interconnection system based on dual mixing chambers according to claim 1 is characterized in that: The preset safety margin standard includes a first safety margin threshold corresponding to the first subsystem and a second safety margin threshold corresponding to the second subsystem in the distributed interconnected system; when evaluating and judging whether the distributed interconnected system meets the safety margin requirement, the safety margin combination diagram is divided into regions according to the safety margin thresholds of the two subsystems, and the region where the safety margin of the first subsystem is greater than the first safety margin threshold and the safety margin of the second subsystem is greater than the second safety margin threshold is taken as the first region; If the safety margin combination curve is in the first region, it is determined that the distributed interconnected system meets the safety margin requirement; otherwise, it is determined that the distributed interconnected system does not meet the safety margin requirement.

8. The method for evaluating safety margin of a distributed interconnection system based on dual mixing chambers according to claim 7 is characterized in that: After determining that the distributed interconnected system meets the safety margin requirement, the method further includes: obtaining a safety margin combination that meets the safety margin requirement based on a section of the safety margin combination curve in the first area.

9. A distributed interconnection system safety margin evaluation system based on dual mixing chambers, characterized in that: include: test systems and computational evaluation systems; The test system comprises a dual-wave mixing chamber and a test unit, and the test system is used to test the distributed interconnection system using the dual-wave mixing chamber to obtain sensitive threshold combination information of the distributed interconnection system; The calculation and evaluation system is used to draw a safety margin combination curve according to the sensitive threshold combination information, and to evaluate and judge whether the distributed interconnected system meets the safety margin requirement according to the safety margin combination curve and a preset safety margin standard; The dual-mixing chamber-based distributed interconnection system safety margin evaluation system is used to execute the steps in the dual-mixing chamber-based distributed interconnection system safety margin evaluation method as described in any one of claims 1-8.

10. The safety margin evaluation system of a distributed interconnection system based on dual mixing chambers according to claim 9, characterized in that: The dual mixing chamber includes a receiving antenna, a transmitting antenna, a stirrer and a drive control unit; the test unit includes a signal source, a power amplifier, a directional coupler, a power meter, a spectrum analyzer and a test control and data acquisition unit; the stirrer is connected to the drive control unit, the drive control unit, the spectrum analyzer, the power meter and the signal source are all connected to the test control and data acquisition unit, the signal source, the power amplifier, the directional coupler and the transmitting antenna are connected in sequence, the power meter is connected to the directional coupler, and the receiving antenna is connected to the spectrum analyzer.

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