Horizontal four-comprehensive test system and control method thereof

Abstract

The invention belongs to the technical field of environment simulation tests, and discloses a horizontal four-comprehensive test system and a control method thereof. The device comprises a vibration table body, a test box, a sealing assembly and a pressure regulating assembly, the vibration table body comprises a table top, and the table top is used for placing a test piece; the table board is arranged in the test box; the sealing assembly seals a gap between the table top and the test box so as to divide the interior of the test box into a first chamber and a second chamber; the pressure regulating assembly is used for respectively detecting and regulating the air pressure values of the first chamber and the second chamber, so that the acting force generated by the pressure difference between the first chamber and the second chamber on the table board counteracts the gravity of the table board and the test piece. The device can reduce the abrasion of friction force generated by gravity to the table top, prolong the service life of the table top, eliminate the influence of the table top on the stress state of a test piece, enable the test result to be more accurate and reliable, truly reflect the performance of the test piece in a low-pressure environment, improve the reliability and effectiveness of a test system, and facilitate the equipment test in the fields of aviation, spaceflight and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental simulation tests, and in particular to a level four integrated test system and a control method thereof. Background Art

[0002] With the rapid development of aviation, aerospace and other fields, it is increasingly important to conduct comprehensive and accurate tests on equipment operating in low-pressure environments, and the Level 4 comprehensive environmental test system has been widely used. The system can simulate a variety of complex environmental conditions, including air pressure, temperature, humidity and other factors, so as to effectively evaluate the performance and reliability of equipment in the actual operating environment.

[0003] The existing Level 4 comprehensive environmental test system has certain limitations. Existing systems often focus on isolating the temperature, humidity and air pressure inside and outside the test chamber, but ignore the impact of environmental changes in the test chamber on its internal components. During the test, the weight of the table and the gravity of the test piece will have an impact that cannot be underestimated. Under the action of gravity, the table will generate friction during movement, which will not only cause additional wear to the table itself and reduce its service life, but also in tests that need to accurately simulate the actual environment, the existence of this friction may change the stress state of the test piece, causing the vibration of the table to be inconsistent with the preset situation, resulting in deviations in the test results, and unable to truly reflect the performance of the equipment in the actual low-pressure environment. Summary of the invention

[0004] The purpose of the present invention is to provide a horizontal four-integrated test system and a control method thereof, which utilizes the pressure difference to offset the gravity of the table and the specimen without interfering with the normal environmental test of the specimen, thereby eliminating the adverse effects brought by the gravity of the table and the specimen.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A level 4 integrated test system, comprising:

[0007] A vibration table body, comprising a table top, the table top being used for placing a test piece;

[0008] a test box, in which the table is disposed;

[0009] A sealing assembly, the sealing assembly sealing the gap between the table and the test box to separate the interior of the test box into a first chamber and a second chamber;

[0010] A pressure regulating component detects and regulates the air pressure values ​​of the first chamber and the second chamber respectively, so that the force exerted on the table by the pressure difference between the first chamber and the second chamber offsets the gravity of the table and the specimen.

[0011] Preferably, the vibration table body further comprises a support base, which is slidably connected to the table top to support the table top.

[0012] Preferably, the vibration table body also includes an excitation head, which is connected to one end of the table top and is used to drive the table top to vibrate. The end of the excitation head connected to the table top passes through the side wall of the test box, and the excitation head and the test box are sealed.

[0013] Preferably, a cooling channel is provided in the table top to isolate the heat of the first chamber.

[0014] Preferably, the pressure regulating assembly includes a first pressure gauge and a second pressure gauge, the first pressure gauge is arranged in the first chamber to monitor the pressure value p1 of the first chamber, and the second pressure gauge is arranged in the second chamber to monitor the pressure value p2 of the second chamber.

[0015] Preferably, the level four integrated test system also includes a temperature control component, which includes a first temperature control component and a second temperature control component, the first temperature control component is used to adjust the temperature of the first chamber, and the second temperature control component is used to adjust the temperature of the second chamber.

[0016] Preferably, the level four integrated test system further includes a humidity control component, which includes a first humidity control component and a second humidity control component, wherein the first humidity control component is used to adjust the humidity of the first chamber, and the second humidity control component is used to adjust the humidity of the second chamber.

[0017] Preferably, the test box comprises an outer wall, a thermal insulation layer and an inner wall, and the thermal insulation layer is sandwiched between the outer wall and the inner wall.

[0018] Preferably, the sealing assembly includes a heat insulating member and a sealing member, wherein the heat insulating member is disposed on the table top, the outer periphery of the heat insulating member is connected to the sealing member, and the sealing member is connected to the test box.

[0019] A control method for a level 4 integrated test system, comprising the level 4 integrated test system, the control method comprising:

[0020] S1: Obtain the mass m1 of the table and the mass m2 of the specimen, as well as the area s of the table affected by the pressure difference between the first chamber and the second chamber;

[0021] S2: The pressure regulating component regulates the air pressure value p1 required for the first chamber test;

[0022] S3: According to the air pressure value p1 of the first chamber, the pressure regulating component regulates the air pressure value p2 of the second chamber, and the air pressure p2 of the second chamber satisfies (p2-p1)s=(m1+m2)g.

[0023] Beneficial effects:

[0024] The present invention provides a horizontal four-in-one test system and a control method thereof. The table top of a vibration table body is located in a test box. A sealing component seals the gap between the table top and the test box to separate the inside of the test box into a first chamber and a second chamber. The pressure regulating component detects and regulates the air pressure values ​​of the first chamber and the second chamber, and utilizes the pressure difference between the first chamber and the second chamber to generate a force on the table top, thereby offsetting the gravity of the table top and the test piece.

[0025] Since the influence of gravity on the table is eliminated, the test results are more accurate and reliable, and can truly reflect the performance of the test piece in an actual low-pressure environment, thereby improving the reliability and effectiveness of the test system and being more conducive to the testing of related equipment in the fields of aviation and aerospace. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a level four comprehensive test system provided by the present invention;

[0027] Figure 2 is a cross-sectional schematic diagram of a table provided by the present invention;

[0028] Figure 3 It is a schematic diagram of the voltage regulating assembly of the present invention.

[0029] In the figure:

[0030] 1-vibration table body; 11-excitation head; 12-table top; 13-support seat; 121-cooling channel;

[0031] 2-test box; 21-outer wall; 22-inner wall; 23-insulation layer; 24-first chamber; 25-second chamber; 26-support platform;

[0032] 3-sealing component; 31-heat insulation component; 32-sealing component;

[0033] 4-pressure regulating assembly; 41-first pressure gauge; 42-second pressure gauge; 43-pressure regulating unit; 44-executing unit;

[0034] 5-temperature control component; 6-humidity control component; 7-test piece. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] This embodiment provides a level four comprehensive test system, such as Figure 1As shown, the test chamber 2 includes a vibration table 1, a test chamber 2, a sealing assembly 3 and a pressure regulating assembly 4. The vibration table 1 includes a table 12, and the table 12 is used to place a test piece 7. The table 12 is arranged in the test chamber 2. The sealing assembly 3 seals the gap between the table 12 and the test chamber 2 to separate the interior of the test chamber 2 into a first chamber 24 and a second chamber 25. The pressure regulating component 4 detects and regulates the air pressure values ​​of the first chamber 24 and the second chamber 25 respectively, so that the force exerted on the table 12 by the pressure difference between the first chamber 24 and the second chamber 25 offsets the gravity of the table 12 and the test piece 7, reducing the additional wear of the table 12 caused by the friction force generated by gravity, and extending the service life of the table 12, which is crucial to the long-term stable operation of the test system, and can reduce maintenance costs and replacement frequency. At the same time, it eliminates the influence of gravity and friction on the stress state of the table 12, so that no matter how many test pieces 7 the table 12 supports, it can achieve the preset vibration effect under the drive of the vibration source, ensuring that the test results are more accurate and reliable, and can truly reflect the performance of the test piece 7 in a low-pressure environment. For equipment testing in high-precision fields such as aviation and aerospace, it can ensure the validity of the test data, provide a basis for equipment design, improvement and safety evaluation, and also improve the reliability and effectiveness of the test system.

[0040] In this embodiment, the sealing assembly 3 separates the interior of the test box 2 into two chambers, wherein the first chamber 24 is used to place the test piece 7 for testing, and the second chamber 25 is used to place the vibration table body 1. In other embodiments, the interior of the test box 2 may also be separated into three, four or more chambers, which may be used to place different test pieces 7, and the number of chamber separations is not specifically limited here.

[0041] In this embodiment, the vibration table body 1 also includes a vibration head 11, which is connected to one end of the table 12 and is used to drive the table 12 to vibrate. The end of the vibration head 11 connected to the table 12 passes through the side wall of the test box 2, and the vibration head 11 and the test box 2 are sealed. The vibration head 11 provides vibration power for the table 12, which can accurately simulate the vibration environment experienced by the test piece 7 under actual working conditions. The vibration head 11 passes through the side wall of the test box 2 and is sealed to ensure that the internal environment of the test box 2 is not disturbed by external factors. During the test, the air pressure, temperature and other conditions in the test box 2 are kept stable. For precise low-pressure environment tests, gas leakage can be prevented, the pressure difference can be guaranteed to be stable, and the accuracy of the test results can be avoided from environmental changes.

[0042] Specifically, the vibration head 11 can be driven by a servo motor system or an electric drive system, and no specific limitation is made here. In addition, the vibration table 1 is similar to the common vibration table 1 in structure, and will not be described here.

[0043] In the present embodiment, the vibration table body 1 further includes a support seat 13, which is slidably connected to the table top 12 to support the table top 12. The support seat 13 can provide a stable support for the table top 12 when the test system is not turned on, so as to prevent the gravity of the table top 12 from causing the part where the excitation head 11 is connected to the table top 12 to bend and deform. During the test, especially in a vibration environment, the support seat 13 can also ensure that the table top 12 will not shake or tilt due to uneven force or instability, thereby ensuring the normal progress of the test and maintaining the consistency and stability of the test conditions. Specifically, between the support seat 13 and the table top 12, one of the two is provided with a guide rail (not shown in the figure), and the other of the two is provided with a slider (not shown in the figure), and the guide rail cooperates with the slider to achieve a sliding connection between the support seat 13 and the table top 12.

[0044] Specifically, lubricating oil (not shown in the figure) is applied to the gap between the support seat 13 and the table 12, and the lubricating oil optimizes the contact condition between the support seat 13 and the table 12. The lubricating oil reduces the friction coefficient, reduces the heat generated by vibration friction and the impact on the vibration characteristics of the table 12, and can also fill the gap to prevent impurities from affecting the contact state and test accuracy, buffer the impact force, protect the components, extend the service life, and ensure the reliable operation of the system. When the pressure difference between the first chamber 24 and the second chamber 25 balances the gravity of the table 12 and the test piece 7, the pressure distribution between the support seat 13 and the table 12 is more uniform, so that the distribution of the lubricating oil in the gap between the two is also more stable and uniform, which better reduces the friction coefficient, reduces the problem of lubricating oil caused by gravity, ensures that the table 12 vibrates smoothly, reduces the possibility of frictional heat and the impact on the vibration characteristics, continuously ensures the accuracy of the test, and is more conducive to the lubricating oil to play other protective roles to ensure the reliable operation of the system.

[0045] In this embodiment, a cooling channel 121 is provided in the table 12 to isolate the heat of the first chamber 24. Preventing heat from being transferred to the table 12 can prevent the table 12 from being deformed or having its material properties changed due to heat, thereby ensuring the flatness and structural stability of the table 12 and providing a stable placement plane for the test piece 7. At the same time, the lubricating oil in the gap between the support seat 13 and the table 12 is protected to prevent it from deteriorating or volatilizing due to high temperature, thereby preventing the vibration effect from being adversely affected due to the loss of lubrication effect.

[0046] Specifically, Figure 2As shown, a plurality of cooling channels 121 are provided in the table 12, an inlet is provided at one end of the table 12, and an outlet is provided at the other end. The coolant flows in from the inlet, diffuses along the plurality of cooling channels 121, fully absorbs the heat that may be transferred to the table 12, and then flows out from the outlet. This multi-channel design increases the contact area and contact time between the coolant and the table 12, improves the heat exchange efficiency, and thus more effectively ensures the stability of the table temperature. It is worth noting that the arrangement of the plurality of cooling channels 121 in the table 12 can be in a chessboard shape or a snake shape, etc., which is not specifically limited here.

[0047] like Figure 3 As shown, the pressure regulating assembly 4 includes a pressure regulating unit 43 and two execution units 44. The pressure regulating unit 43 controls the two execution units 44, one of which is used to adjust the air pressure value of the first chamber 24 for testing, and the other is used to adjust the air pressure value of the second chamber 25 to balance the gravity of the table 12 and the specimen 7. This method realizes precise air pressure control, ensures the stability of the test system in terms of air pressure, avoids problems such as force changes on the specimen 7 and abnormal vibration of the table 12 caused by air pressure fluctuations, and can also adapt to specimens 7 of different masses and different types of tests, improving the adaptability of the system to various test scenarios.

[0048] In this embodiment, the pressure regulating assembly 4 further includes a first pressure gauge 41 and a second pressure gauge 42. The first pressure gauge 41 is disposed in the first chamber 24 to monitor the pressure value p1 of the first chamber 24, and the second pressure gauge 42 is disposed in the second chamber 25 to monitor the pressure value p2 of the second chamber 25. The first pressure gauge 41 and the second pressure gauge 42 facilitate precise control, providing a basis for the pressure regulating unit 43 to control the execution unit 44, so that the chamber pressure quickly returns to a suitable range.

[0049] like Figure 3 As shown, the pressure regulating unit 43 outputs a signal to regulate one of the execution units 44 so that the air pressure value of the first chamber 24 reaches the p1 required by the test. During this process, the first pressure gauge 41 feeds back a signal to the pressure regulating unit 43. The pressure regulating unit 43 calculates the air pressure value p2 of the second chamber 25 required to balance the gravity of the table 12 and the test piece 7 based on the air pressure value p1 of the first chamber 24. The pressure regulating unit 43 outputs a signal to regulate another execution unit 44 so that the air pressure value p2 of the second chamber 25 reaches a preset value. During this process, the second pressure gauge 42 feeds back a signal to the pressure regulating unit 43.

[0050] It is worth mentioning that the control unit 43 includes a sensor, a controller and a communication module to complete the control of the execution unit 44. It should be noted that the technology involved in the control unit 43 belongs to the existing mature technology, has been widely used in this field and has clear principles, so it will not be elaborated in detail here.

[0051] It is worth noting that the execution unit 44 can use equipment such as a vacuum pump or a gas compressor, which can be determined based on a variety of factors such as actual test requirements, air pressure adjustment range, accuracy requirements, and overall system design, and is not specifically limited here.

[0052] In this embodiment, the level 4 integrated test system also includes a temperature control component 5, which includes a first temperature control component and a second temperature control component. The first temperature control component is used to adjust the temperature of the first chamber 24, and the second temperature control component is used to adjust the temperature of the second chamber 25. The first temperature control component adjusts the temperature of the first chamber 24 to the temperature required for the test, ensuring that the test piece 7 is tested under stable and appropriate temperature conditions, thereby ensuring the accuracy and reliability of the test data. The second temperature control component adjusts the temperature of the second chamber 25 to a temperature suitable for the operation of the vibration table 1, preventing the deformation of the table 12 due to excessive temperature, and at the same time, preventing the lubricating oil from deteriorating, ensuring the lubrication effect, helping to extend the service life of the vibration table 1, and maintaining the accuracy and stability of the vibration, ensuring the normal operation of the entire test system.

[0053] In this embodiment, the level 4 integrated test system further includes a humidity control component 6, which includes a first humidity control component and a second humidity control component. The first humidity control component is used to adjust the humidity of the first chamber 24, and the second humidity control component is used to adjust the humidity of the second chamber 25. The first humidity control component adjusts the humidity of the first chamber 24 to the humidity required for the test, ensuring that the test piece 7 is tested under stable and appropriate humidity conditions, thereby ensuring the accuracy and reliability of the test data. The second humidity control component adjusts the humidity of the second chamber 25 to maintain its humidity within a range suitable for the operation of the vibration table 1, preventing the emulsification of the lubricating oil or avoiding excessive volatilization of water in the lubricating oil, ensuring the normal operation of the vibration table 1, and extending its service life.

[0054] In this embodiment, the test box 2 includes an outer wall 21, an insulation layer 23 and an inner wall 22, and the insulation layer 23 is sandwiched between the outer wall 21 and the inner wall 22. The insulation layer 23 reduces the heat exchange between the inside and outside of the test box 2, helps to maintain the internal temperature stable, reduces the energy consumption of the temperature control component 5, improves the temperature uniformity, ensures that the test piece 7 and the vibration table body 1 work in a stable environment, and improves the accuracy and reliability of the test results. Specifically, the outer wall 21 of the test box 2 supports the entire test box structure and provides a stable external structure for the test box 2. The inner wall 22 of the test box 2 constitutes a pressure-bearing structure to ensure that the test box 2 meets the performance requirements during the low-pressure test, so that the test can be carried out in a safe and conditional environment.

[0055] In this embodiment, the sealing assembly 3 includes a heat insulating member 31 and a sealing member 32. The heat insulating member 31 is disposed on the table 12. The outer periphery of the heat insulating member 31 is connected to the sealing member 32. The sealing member 32 is connected to the test box 2. The heat insulating member 31 and the sealing member 32 work together. The heat insulating member 31 reduces heat transfer, which helps the sealing member 32 to maintain good sealing performance at a relatively stable temperature. At the same time, the sealing effect of the sealing member 32 maintains the stability of the environment around the heat insulating member 31, further enhances the heat insulation effect, and ensures the stability and reliability of the test environment of the first chamber 24 and the second chamber 25.

[0056] Specifically, Figure 1 As shown, the inner wall 22 of the test box 2 is also provided with a support platform 26, and the seal 32 is connected to the support platform 26. The support platform 26 provides an additional support position for the seal 32, so that the seal 32 can stably maintain its sealing position and state when the air pressure in the test box 2 changes.

[0057] It is worth noting that, in order to avoid the excitation head 11, the support platform 26 has a notch at the position where the excitation head 11 is set on the inner wall 22. In this embodiment, the seal 32 is annular, the inner periphery of the seal 32 is sealed and connected to the outer periphery of the seal 32, part of the outer periphery of the seal 32 is sealed and connected to the support platform 26, and part of the outer periphery of the seal 32 is sealed and connected to the inner wall 22 at the notch position of the support platform 26.

[0058] It is worth noting that the heat insulating member 31 is made of synthetic stone, and other materials that can meet the requirements of heat insulation performance can also be used to make the heat insulating member 31, and no specific limitation is made here.

[0059] It is worth noting that the sealing member 32 is made of a composite of asbestos cloth and ceramic fiber fireproof cloth, and other high temperature resistant materials may also be selected, which is not specifically limited here.

[0060] This embodiment also provides a control method for a level 4 integrated test system, the control method comprising:

[0061] S1: Obtain the mass m1 of the table 12 and the mass m2 of the test piece 7 , as well as the area s of the table 12 affected by the pressure difference between the first chamber 24 and the second chamber 25 .

[0062] S2: The pressure regulating component 4 regulates the air pressure value p1 required for the test in the first chamber 24 .

[0063] S3: According to the air pressure value p1 of the first chamber 24, the pressure regulating component 4 adjusts the air pressure value p2 of the second chamber 25, and the air pressure p2 of the second chamber 25 satisfies (p2-p1)s=(m1+m2)g.

[0064] The control method adjusts the air pressure value based on parameters such as the mass of the table 12, the mass of the specimen 7, and the area of ​​the table 12 affected by the pressure difference between the first chamber 24 and the second chamber 25, so as to balance the gravity of the table 12 and the specimen 7, and can adapt to specimens 7 of different masses and tables 12 of different specifications. Whether the test uses a small light-weight specimen 7 or a large heavy-weight specimen 7, the air pressure can be accurately adjusted by this method, so that the test system can flexibly respond to various test requirements, broadening the application scope of the level 4 comprehensive test system.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A level 4 comprehensive test system, characterized in that: include: A vibration table body (1) comprises a table top (12), wherein the table top (12) is used to place a test piece (7); A test box (2), wherein the table top (12) is arranged in the test box (2); A sealing component (3), wherein the sealing component (3) seals a gap between the table (12) and the test box (2) so as to separate the interior of the test box (2) into a first chamber (24) and a second chamber (25); A pressure regulating component (4), wherein the pressure regulating component (4) detects and regulates the air pressure values ​​of the first chamber (24) and the second chamber (25) respectively, so that the pressure difference between the first chamber (24) and the second chamber (25) generates a force on the table (12) to offset the gravity of the table (12) and the test piece (7).

2. The level 4 comprehensive test system according to claim 1 is characterized in that: The vibration table body (1) further comprises a support seat (13), wherein the support seat (13) is slidably connected to the table top (12) and is used to support the table top (12).

3. The level 4 comprehensive test system according to claim 1 is characterized in that: The vibration table body (1) further comprises an excitation head (11), the excitation head (11) being connected to one end of the table top (12) and used for driving the table top (12) to vibrate, the end of the excitation head (11) connected to the table top (12) passing through the side wall of the test box (2), and the excitation head (11) and the test box (2) being sealed.

4. The level 4 comprehensive test system according to claim 1 is characterized in that: A cooling channel (121) is provided in the table top (12) for isolating the heat of the first chamber (24).

5. The level 4 comprehensive test system according to claim 1 is characterized in that: The pressure regulating assembly (4) comprises a first pressure gauge (41) and a second pressure gauge (42); the first pressure gauge (41) is arranged in the first chamber (24) to monitor the pressure value p1 of the first chamber (24); and the second pressure gauge (42) is arranged in the second chamber (25) to monitor the pressure value p2 of the second chamber (25).

6. The level 4 comprehensive test system according to claim 1 is characterized in that: The level 4 integrated test system also includes a temperature control component (5), and the temperature control component (5) includes a first temperature control component and a second temperature control component, wherein the first temperature control component is used to adjust the temperature of the first chamber (24), and the second temperature control component is used to adjust the temperature of the second chamber (25).

7. The level 4 comprehensive test system according to claim 1 is characterized in that: The level four integrated test system also includes a humidity control component (6), and the humidity control component (6) includes a first humidity control component and a second humidity control component, wherein the first humidity control component is used to adjust the humidity of the first chamber (24), and the second humidity control component is used to adjust the humidity of the second chamber (25).

8. The level 4 comprehensive test system according to claim 1 is characterized in that: The test box (2) comprises an outer wall (21), a heat-insulating layer (23) and an inner wall (22); the heat-insulating layer (23) is sandwiched between the outer wall (21) and the inner wall (22).

9. The level 4 comprehensive test system according to claim 1 is characterized in that: The sealing assembly (3) comprises a heat insulating member (31) and a sealing member (32); the heat insulating member (31) is arranged on the table top (12); the outer periphery of the heat insulating member (31) is connected to the sealing member (32); and the sealing member (32) is connected to the test box (2).

10. A control method for a level 4 comprehensive test system, comprising the level 4 comprehensive test system according to any one of claims 1 to 9, characterized in that: The control method comprises: S1: obtaining the mass m1 of the table (12), the mass m2 of the test piece (7), and the area s of the table (12) affected by the pressure difference between the first chamber (24) and the second chamber (25); S2: the pressure regulating component (4) regulates the air pressure value p1 required for the test in the first chamber (24); S3: According to the air pressure value p1 of the first chamber (24), the pressure regulating component (4) adjusts the air pressure value p2 of the second chamber (25), and the air pressure p2 of the second chamber (25) satisfies (p2-p1)s=(m1+m2)g.

Images