Test device and method for multi-spacecraft simultaneous water ejection experiment under reduced pressure environment

Abstract

The application discloses a kind of test device and method of multi-spacecraft salvo water ejection experiment under reduced pressure environment, device includes: reduced pressure water tank, air compressor, guide rail module, launch module, high-speed camera, negative pressure display and synchronizer.Through synchronizer, negative pressure display, electromagnetic valve, guide rail module and high-speed camera, the information capture of multiple-phase flow field, velocity field and motion attitude around multi-spacecraft at the same time is realized, so as to achieve the purpose of experiment, greatly improve the precision of test, verify the reliability of experimental results, provide strong test technical support for the field of cross-medium multi-spacecraft salvo water ejection experiment test.

Description

Technical Field

[0001] The present invention relates to the technical field of water-emergence experiments for navigation bodies, and more specifically, to a testing device and method for a water-emergence experiment for multiple navigation bodies in a reduced-pressure environment. Background Art

[0002] When the vehicle moves from underwater to above the water surface, the fluid medium also changes from a single gas to a gas-liquid-vapor multiphase coupling, which is an unsteady and highly nonlinear turbulence problem. In addition, during the salvo process, the flow fields between the vehicle bodies will produce flow interference with each other, which has a great impact on the vehicle's water exit posture and force. Therefore, the research on the vehicle's water exit is very challenging.

[0003] Currently, flow field testing primarily involves capturing the flow field and motion of the experimental vehicle using a high-speed camera. These images are then imported into post-processing software for analysis to determine the transient flow field and motion patterns of the vehicle. However, existing flow field testing platforms for variable pressure environments, such as water tunnel experiments, are primarily designed for stationary models. When it comes to flow field testing for underwater vertical launches or free-range motion, static water tunnel experiments often combine semi-empirical and semi-theoretical techniques to restore the flow field image. This can introduce significant errors and compromise the reliability of the test results.

[0004] Therefore, the present invention provides a test device and method for a multi-vehicle salvo water exit experiment under a decompression environment. Summary of the Invention

[0005] In view of this, the present invention provides a testing device and method for a multi-vehicle salvo water exit experiment in a decompression environment.

[0006] In one aspect, the present invention provides a test device for a multi-vehicle salvo water launch experiment in a decompression environment, comprising:

[0007] The pressure reducing water tank comprises a top plate and a bottom plate arranged opposite to each other in a direction perpendicular to the ground, the top plate being provided with a hollow area and a pressure extraction port, the hollow area being engaged with an end cover, and the pressure extraction port being connected to an air inlet of an air compressor;

[0008] a guide rail module, disposed in the decompression water tank, comprising a lifting assembly extending in a direction perpendicular to the ground and a translation assembly extending in a first direction, the translation assembly being slidably connected to the lifting assembly, the lifting assembly driving the translation assembly to move in a direction perpendicular to the ground, the first direction being perpendicular to the direction perpendicular to the ground;

[0009] The launching module comprises a mobile platform, wherein the side of the mobile platform close to the base plate is slidably connected to the translation assembly, and the translation assembly drives the mobile platform to move along the first direction; the launching module also comprises at least two cylinders, one end of the cylinder is engaged with a gas outlet base, and the side of the gas outlet base away from the cylinder is fixedly connected to the side of the mobile platform away from the base plate; the launching module also comprises a gas cylinder fixed to the side of the mobile platform away from the base plate, the gas cylinder and the gas outlet base are arranged correspondingly, the gas outlet of the gas cylinder is connected to the corresponding gas inlet of the gas outlet base, and the gas outlet end of the gas cylinder is provided with a solenoid valve;

[0010] a high-speed camera, disposed outside the decompression water tank, wherein the shooting range of the high-speed camera covers the transmitting module and the area between the transmitting module and the top plate in a direction perpendicular to the ground;

[0011] a negative pressure display, disposed on a side of the top plate away from the bottom plate, the negative pressure display being in communication with the interior of the decompression water tank and being used to measure the pressure inside the decompression water tank;

[0012] A synchronizer is electrically connected to the negative pressure display, the solenoid valve, the guide rail module and the high-speed camera respectively.

[0013] Optionally, the end cover includes a cover body and a protrusion provided on one side of the cover body, and the protrusion is engaged with the hollow area;

[0014] A side of the protrusion close to the bottom plate and a side of the top plate close to the bottom plate are both provided with shock-absorbing pads.

[0015] Optionally, the outer wall of the protrusion is provided with a sealing layer.

[0016] Optionally, a support column is provided on a side of the bottom plate away from the top plate, an end of the support column away from the bottom plate is connected to a suction cup, a side of the suction cup away from the support column is in contact with the ground, and the suction cup is provided corresponding to the support column;

[0017] The number of the support columns is at least 3, and at least 3 support columns are arranged in an array around the center of the base plate.

[0018] Optionally, the bottom plate is provided with a drain outlet, and the drain outlet is provided with a switch.

[0019] Optionally, the side wall of the decompression water tank is provided with at least two transparent windows, and the high-speed camera faces the transparent windows;

[0020] A fill light is arranged outside the decompression water tank, and the fill light faces the transparent window.

[0021] Optionally, the synchronizer is electrically connected with the high-speed camera through a high-speed camera control computer, and the synchronizer is electrically connected with the guide rail module through a guide rail control computer.

[0022] In another aspect, the application also provides a test method for multi-vehicle simultaneous ejection experiment in a reduced pressure environment, applied to the test device for multi-vehicle simultaneous ejection experiment in a reduced pressure environment as described in any of the above, comprising:

[0023] Dismounting the end cover and injecting water into the reduced pressure water tank;

[0024] Controlling the guide rail assembly to drive the moving platform to approach the hollow area;

[0025] Loading vehicles into the cylinder, and the vehicles correspond to the cylinders one by one;

[0026] Covering a sealing film on the side of the cylinder away from the moving platform;

[0027] Controlling the guide rail assembly to drive the moving platform to reach a preset position;

[0028] Engaging the end cover with the hollow area;

[0029] Starting the air compressor, and when the negative pressure display detects that the pressure inside the reduced pressure water tank reaches a preset pressure, stopping the air compressor and sending a start signal to the synchronizer;

[0030] The synchronizer receives the start signal, controls the translation assembly to move at a preset speed and in a preset direction, controls the high-speed camera to start recording at the same time, and controls the electromagnetic valve to open in a preset order, and when the electromagnetic valve is opened, the vehicle in the cylinder corresponding to the electromagnetic valve is ejected;

[0031] After all the vehicles are ejected and fall, the high-speed camera is controlled to stop recording to obtain data information and save it.

[0032] Optionally, after all the vehicles are ejected and fall, the method further comprises:

[0033] Dismounting the end cover and salvaging all the vehicles;

[0034] Controlling the guide rail assembly to drive the moving platform to approach the hollow area, and draining the water in the cylinder;

[0035] Opening the switch to drain the water in the reduced pressure water tank.

[0036] Optionally, before starting the air compressor, the method further comprises:

[0037] Setting the position of the high-speed camera, setting the position of the light, setting the shooting parameter of the high-speed camera, setting the preset pressure for the negative pressure display, setting the preset speed, the preset direction and the preset sequence for the synchronizer.

[0038] Compared with the prior art, the test device and method for multi-vehicle simultaneous launching and water ejection experiment in a reduced pressure environment provided by the application at least achieve the following beneficial effects:

[0039] The test device and method for multi-vehicle simultaneous launching and water ejection experiment in a reduced pressure environment provided by the application are based on an experimental device of a reduced pressure water tank, cooperate with a guide rail module, a launching module, a high-speed camera, a negative pressure display and a synchronizer, carry out multi-phase flow field and motion interference testing of multi-launching vehicles in a certain water depth during the free motion process of the multi-launching vehicles to the water surface, realize the capture of the multi-phase flow field, the velocity field and the motion attitude information around the experimental model of the multi-vehicle at the same time through the synchronizer, the negative pressure display, the electromagnetic valve, the guide rail module and the high-speed camera, so as to achieve the experimental purpose, greatly improve the testing accuracy, verify the reliability of the experimental results, and provide strong test technical support for the field of multi-vehicle simultaneous launching and water ejection experiment testing across media.

[0040] Of course, implementing any product of the application does not necessarily need to achieve all the technical effects described above at the same time.

[0041] Other features of the application and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0043] Figure 1 is a structural schematic view of the test device for multi-vehicle simultaneous launching and water ejection experiment in a reduced pressure environment provided by the application.

[0044] Figure 2 is a structural schematic view of the launching module.

[0045] Figure 3 is a flow schematic view of the test method for multi-vehicle simultaneous launching and water ejection experiment in a reduced pressure environment provided by the application.

[0046] Figure 4 is an experimental test flow field diagram.

[0047] Figure 5 is a velocity diagram of the first launching vehicle.

[0048] Figure 6is a trajectory diagram of a first launch vehicle moving in a direction perpendicular to the ground.

[0049] In the figure: 1, a decompression water tank; 2, a top plate; 3, a bottom plate; 4, a pressure extraction port; 5, an end cover; 6, a lifting assembly; 7, a translation assembly; 8, a launch module; 9, a moving platform; 10, a cylinder; 11, a gas outlet base; 12, a high-speed camera; 13, a synchronizer; 14, a cover; 15, a sealing layer; 16, a support column; 17, a suction cup; 18, a drainage port; 19, a transparent window; 20, a fill-in light; 21, a high-speed camera control computer; 22, a guide rail control computer; 23, a motor; 24, a lead screw; 25, a guide rail; 26, a waterproof tank; X, a first direction; Z, a direction perpendicular to the ground. DETAILED DESCRIPTION

[0050] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the examples, the numerical expressions, and the numerical values are not limiting to the scope of the present application unless otherwise specifically stated.

[0051] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application its application or uses.

[0052] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0053] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0054] It should be noted that like reference numerals and letters in the various figures indicate similar items, and thus, once any term is defined in one figure, it is not necessary to discuss it further in connection with other figures.

[0055] In combination Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a test device for multi-vehicle simultaneous launch water experiment in a decompression environment provided by the present application, Figure 2 is a structural schematic diagram of a launch module, to illustrate a specific embodiment of the test device for multi-vehicle simultaneous launch water experiment in a decompression environment provided by the present application, comprising:

[0056] The decompression water tank 1 comprises a top plate 2 and a bottom plate 3 arranged oppositely in a direction Z perpendicular to the ground, the top plate 2 is provided with a hollow area and a pressure extraction port 4, the hollow area is clamped with an end cover 5, and the pressure extraction port 4 is communicated with the air inlet of an air compressor.

[0057] The guide rail module is arranged in the decompression water tank 1 and includes a lifting assembly 6 extending in a direction Z perpendicular to the ground and a translation assembly 7 extending in a first direction X. The translation assembly 7 is in sliding connection with the lifting assembly 6, and the lifting assembly 6 drives the translation assembly 7 to move in the direction Z perpendicular to the ground. The first direction X is perpendicular to the direction Z perpendicular to the ground.

[0058] The launching module 8 includes a moving platform 9 in sliding connection with the translation assembly 7 on a side of the moving platform 9 close to the bottom plate 3, and the translation assembly 7 drives the moving platform 9 to move in the first direction X. The launching module 8 further includes at least two cylinders 10, each of which has a gas outlet base 11 engaged on one end. The gas outlet base 11 is fixedly connected to the moving platform 9 on a side of the moving platform 9 away from the bottom plate 3. The launching module 8 further includes a gas cylinder fixed to the moving platform 9 on a side of the moving platform 9 away from the bottom plate 3. The gas cylinder is arranged correspondingly to the gas outlet base 11. An air outlet of the gas cylinder is in communication with an air inlet of the corresponding gas outlet base 11. An electromagnetic valve is arranged at an air outlet end of the gas cylinder.

[0059] The high-speed camera 12 is arranged outside the decompression water tank 1. A shooting range of the high-speed camera 12 covers the launching module 8 and an area between the launching module 8 and the top plate 2 in the direction Z perpendicular to the ground.

[0060] The negative pressure display is arranged on a side of the top plate 2 away from the bottom plate 3. The negative pressure display is in communication with the inside of the decompression water tank 1 and is used to measure the pressure inside the decompression water tank 1.

[0061] The synchronizer 13 is electrically connected with the negative pressure display, the electromagnetic valve, the guide rail module, and the high-speed camera 12, respectively.

[0062] It should be noted that the hollow area is in communication with the inside of the decompression water tank 1, and the pressure extraction port 4 is in communication with the inside of the decompression water tank 1, so that the air compressor can control the inside of the decompression water tank 1 to be decompressed through the pressure extraction port 4. The lifting assembly 6 and the translation assembly 7 in the guide rail module are both existing technologies, which can drive the moving platform 9 to move to a preset position. Specifically, the lifting assembly 6 and the translation assembly 7 can both be sliding tables. The sliding table includes a motor 23, a lead screw 24, a sliding block, and a guide rail 25. The motor 23 is a waterproof motor. In this embodiment, the model of the motor 23 is an IP68 waterproof reduction motor. Of course, it is not limited thereto and can be adjusted according to actual needs. The number of the lifting assemblies 6 is two. The two lifting assemblies 6 are oppositely arranged in the first direction X. One end of the translation assembly 7 is fixedly connected to the sliding block of one of the lifting assemblies 6, and the other end is fixedly connected to the sliding block of the other lifting assembly 6. The side of the moving platform 9 close to the bottom plate 3 is fixedly connected to the sliding block of the translation assembly 7.

[0063] It can be understood that the experimental device based on the reduced pressure water tank 1, in conjunction with the guide rail module, the launch module 8, the high-speed camera 12, the negative pressure display and the synchronizer 13, carries out multiphase flow field and motion interference tests during the free movement of multiple navigation bodies to the water surface at a certain water depth. Through the synchronizer 13, the negative pressure display, the solenoid valve, the guide rail 25 module and the high-speed camera 12, the multiphase flow field, velocity field, and motion posture information around the multi-navigation body experimental model at the same time are captured, thereby achieving the experimental purpose, greatly improving the test accuracy, verifying the reliability of the experimental results, and providing strong testing technology support for the field of cross-media multi-navigation body salvo water test.

[0064] In some optional embodiments, continue to refer to Figure 1 , the end cover 5 includes a cover body 14 and a protrusion provided on one side of the cover body 14, the protrusion being engaged with the hollow area;

[0065] Shock-absorbing pads are provided on the side of the protrusion close to the bottom plate 3 and the side of the top plate 2 close to the bottom plate 3.

[0066] It is understandable that when the navigation body moves upward, it may hit the side of the protrusion close to the bottom plate 3 or the side of the top plate 2 close to the bottom plate 3, so shock-absorbing pads are set on the side of the protrusion close to the bottom plate 3 and the side of the top plate 2 close to the bottom plate 3 for protection.

[0067] In some optional embodiments, continue to refer to Figure 1 The outer wall of the protrusion is provided with a sealing layer 15.

[0068] It is understandable that since the pressure inside the decompression water tank 1 needs to be controlled, it is necessary to ensure that the decompression water tank 1 has good sealing properties. A sealing layer 15 is provided on the outer wall of the protrusion to make the protrusion and the hollow area fit more tightly, thereby avoiding air leakage after the protrusion and the hollow area are fit together, which affects the experimental results.

[0069] In some optional embodiments, continue to refer to Figure 1 , a support column 16 is provided on the side of the bottom plate 3 away from the top plate 2, and a suction cup 17 is connected to one end of the support column 16 away from the bottom plate 3, and the side of the suction cup 17 away from the support column 16 is in contact with the ground, and the suction cup 17 is provided corresponding to the support column 16;

[0070] The number of the support columns 16 is at least three, and at least three support columns 16 are arranged in an array around the center of the base plate 3 .

[0071] It can be understood that a support column 16 is provided on the side of the bottom plate 3 away from the top plate 2, which can ensure a certain distance between the pressure reducing water tank 1 and the ground, making it easy to carry it by a forklift, and a suction cup 17 is connected to the end of the support column 16 away from the bottom plate 3, which can increase the stability between the entire device and the ground and prevent the impact force during the launch of the vehicle from causing the entire device to shake or tip over.

[0072] In some optional embodiments, continuing to refer to Figure 1 , the bottom plate 3 is provided with a drainage port 18, and the drainage port 18 is provided with a switch.

[0073] It can be understood that by controlling the switch, the water inside the decompression water tank 1 can be conveniently drained.

[0074] In some optional embodiments, continuing to refer to Figure 1 , the sidewall of the decompression water tank 1 is provided with at least two transparent windows 19, and the high-speed camera 12 is directed towards the transparent windows 19.

[0075] The light supplement lamp 20 is arranged outside the decompression water tank 1, and the light supplement lamp 20 is directed towards the transparent windows 19.

[0076] It can be understood that if the decompression water tank 1 is transparent, the high-speed camera 12 can directly shoot the internal condition of the decompression water tank 1, if the decompression water tank 1 adopts a metal material in order to increase the firmness of the device, the transparent windows 19 need to be arranged to facilitate the shooting of the high-speed camera 12, and the light supplement lamp 20 also needs to be arranged to provide light.

[0077] In some optional embodiments, continuing to refer to Figure 1 , the synchronizer 13 is electrically connected with the high-speed camera 12 through the high-speed camera control computer 21, and the synchronizer 13 is electrically connected with the guide rail module through the guide rail control computer 22.

[0078] In some optional embodiments, continuing to refer to Figure 2 , the launching module 8 can further include a waterproof box 26, the gas storage cylinder is placed in the waterproof box 26, the waterproof box 26 is provided with a hole away from the side of the bottom plate 3, the pipe part is located in the hole, one end is communicated with the gas outlet of the gas storage cylinder, and the other end is communicated with the gas inlet of the gas outlet base 11, and the waterproof box 26 can weaken or prevent the erosion of water and oxygen in the decompression water tank 1 on the gas storage cylinder.

[0079] Referring to Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 3 is a flow chart of a test method for multi-vehicle simultaneous launching and water ejection experiment in a decompression environment provided by the application, Figure 4 is an experimental test flow chart, Figure 5 is a speed chart of a first launching vehicle, Figure 6 is a motion trajectory chart of the first launching vehicle in a direction perpendicular to the ground, to illustrate a specific embodiment of the test method for multi-vehicle simultaneous launching and water ejection experiment in a decompression environment provided by the application, applied to the test device for multi-vehicle simultaneous launching and water ejection experiment in a decompression environment in any of the above embodiments, comprising:

[0080] S101: disassemble the end cover, and inject water into the water tank;

[0081] S102: control the guide rail assembly to drive the moving platform to approach the hollow area;

[0082] S103: load the navigation body into the cylinder, and the navigation body corresponds to the cylinder one by one;

[0083] S104: cover the sealing film on the side of the cylinder away from the moving platform;

[0084] S105: control the guide rail assembly to drive the moving platform to reach the preset position;

[0085] S106: engage the end cover with the hollow area;

[0086] S107: start the air compressor, and when the negative pressure display detects that the pressure inside the water tank reaches the preset pressure, stop the air compressor and send a start signal to the synchronizer;

[0087] S108: the synchronizer receives the start signal, controls the translation assembly to move at a preset speed and in a preset direction, controls the high-speed camera to start recording at the same time, and controls the electromagnetic valve to open in a preset order, when the electromagnetic valve is opened, the navigation body in the cylinder corresponding to the electromagnetic valve is shot out;

[0088] S109: after all the navigation bodies are shot out and fall, control the high-speed camera to end recording to obtain data information and save.

[0089] It should be noted that before each experiment test, the water surface in the water tank needs to be in a static state to prevent the water surface wave from affecting the flow field test result. Before using the air compressor to extract pressure, it is necessary to carefully check whether each part is working normally, and whether the end cover is sealed well. Turn on the air compressor, and the air compressor extracts the pressure above the water surface in the sealed water tank to the outside of the water tank through the pressure extraction port, so as to realize the adjustable hydrostatic pressure in the water tank. Before the experiment test, the position of the high-speed camera, the position of the light, the shooting parameters of the high-speed camera, the preset pressure of the negative pressure display, the preset speed, the preset direction and the preset order of the synchronizer need to be set, of course, but not limited to this, which can be adjusted according to the actual demand. The shooting parameters of the high-speed camera include aperture size, focal length, shooting frequency and resolution, etc. The position of the high-speed camera, the position of the light and the shooting parameters of the high-speed camera are set to ensure that clear photos can be taken in the experiment.

[0090] It is understood that the gas cylinder supplies gas to the gas base. In this embodiment, each gas cylinder can achieve a maximum transient gas supply of 1.5MPa. The speed of the vehicle model with a diameter of 50mm can reach 40m / s with an error of ±0.5m / s. In step S109, after the high-speed camera finishes recording, the video information is obtained. The video information can be processed and then the multiphase flow field around the multi-vehicle experimental model at the same time can be obtained through post-processing software (refer to Figure 4 ), velocity field (refer to Figure 5 ), and movement posture (refer to Figure 6 )information.

[0091] In some optional embodiments, after all vehicles are launched and fall, the process further includes:

[0092] Remove the end caps and salvage all the navigation bodies;

[0093] The control rail assembly drives the mobile platform to approach the hollow area to drain the water in the cylinder;

[0094] Turn on the switch to drain the water in the pressure reducing tank.

[0095] The test method for the multi-vehicle salvo water exit experiment under a reduced pressure environment provided by the present invention realizes the capture of the multi-phase flow field, velocity field, and motion posture information around the multi-vehicle experimental model at the same time through a synchronizer, a negative pressure display, an electromagnetic valve, a guide rail module and a high-speed camera, thereby achieving the experimental purpose, greatly improving the test accuracy, verifying the reliability of the experimental results, and providing strong testing technology support for the field of cross-media multi-vehicle salvo water exit experiment testing.

[0096] As can be seen from the above embodiments, the test device and method for the multi-vehicle salvo water release experiment under a reduced pressure environment provided by the present invention achieve at least the following beneficial effects:

[0097] The present invention provides a testing device and method for a multi-vehicle salvo water exit experiment under a reduced pressure environment. The experimental device is based on a reduced pressure water tank and cooperates with a guide rail module, a launch module, a high-speed camera, a negative pressure display and a synchronizer to carry out multi-phase flow field and motion interference tests during the free movement of multiple vehicles toward the water surface at a certain water depth. Through the synchronizer, negative pressure display, solenoid valve, guide rail module and high-speed camera, the multi-phase flow field, velocity field and motion posture information around the multi-vehicle experimental model at the same time are captured, thereby achieving the experimental purpose, greatly improving the test accuracy, verifying the reliability of the experimental results, and providing strong testing technology support for the field of cross-media multi-vehicle salvo water exit experiment testing.

[0098] While certain specific embodiments of the application have been described in detail herein for the purposes of exemplification and to provide a thorough and enabling disclosure, it will be understood that the application is not limited to the particular embodiments described. Any modifications of the methods and materials described herein, which come within the scope and spirit of the application, are to be considered within the scope of the application. The scope of the application is to be determined by the claims appended hereto, which are to be construed in accordance with the principles of patent law.

Claims

1. A test method for a multi-vehicle salvo water launch experiment in a decompression environment, using a test device, characterized in that: The testing device comprises: The pressure reducing water tank comprises a top plate and a bottom plate arranged opposite to each other in a direction perpendicular to the ground, the top plate being provided with a hollow area and a pressure extraction port, the hollow area being engaged with an end cover, and the pressure extraction port being connected to an air inlet of an air compressor; a guide rail module, disposed in the decompression water tank, comprising a lifting assembly extending in a direction perpendicular to the ground and a translation assembly extending in a first direction, the translation assembly being slidably connected to the lifting assembly, the lifting assembly driving the translation assembly to move in a direction perpendicular to the ground, the first direction being perpendicular to the direction perpendicular to the ground; The launching module comprises a mobile platform, wherein the side of the mobile platform close to the base plate is slidably connected to the translation assembly, and the translation assembly drives the mobile platform to move along the first direction; the launching module also comprises at least two cylinders, one end of the cylinder is engaged with a gas outlet base, and the side of the gas outlet base away from the cylinder is fixedly connected to the side of the mobile platform away from the base plate; the launching module also comprises a gas cylinder fixed to the side of the mobile platform away from the base plate, the gas cylinder and the gas outlet base are arranged correspondingly, the gas outlet of the gas cylinder is connected to the corresponding gas inlet of the gas outlet base, and the gas outlet end of the gas cylinder is provided with a solenoid valve; a high-speed camera, disposed outside the decompression water tank, wherein the shooting range of the high-speed camera covers the transmitting module and the area between the transmitting module and the top plate in a direction perpendicular to the ground; a negative pressure display, disposed on a side of the top plate away from the bottom plate, the negative pressure display being in communication with the interior of the decompression water tank and being used to measure the pressure inside the decompression water tank; A synchronizer, electrically connected to the negative pressure display, the solenoid valve, the guide rail module and the high-speed camera respectively; The test method includes: Remove the end cover and fill water into the pressure reducing water tank; The control rail assembly drives the mobile platform to approach the hollow area; Loading the navigation body into the cylinder, the navigation body corresponding to the cylinder one by one; Covering a sealing film on a side of the cylinder away from the moving platform; Controlling the guide rail assembly to drive the mobile platform to a preset position; Engaging the end cap with the hollow area; Turning on the air compressor, and when the negative pressure display detects that the pressure inside the decompression water tank reaches a preset pressure, turning off the air compressor and sending a start signal to the synchronizer; The synchronizer receives the start signal, controls the translation assembly to move at a preset speed and in a preset direction, controls the high-speed camera to start recording, and controls the solenoid valves to open in a preset sequence, so that when the solenoid valves are opened, the navigation body in the cylinder corresponding to the solenoid valves is ejected; After all the vehicles are launched and fall, the high-speed camera is controlled to stop recording, obtain data information and save it; dismantling the end covers and salvaging all the navigation bodies; Controlling the guide rail assembly to drive the movable platform to approach the hollow area to discharge the water in the cylinder; Turn on the switch to drain the water in the pressure reducing water tank.

2. The method for testing a multi-vehicle salvo water exit experiment under a decompression environment according to claim 1, characterized in that: The end cover includes a cover body and a protrusion provided on one side of the cover body, wherein the protrusion is engaged with the hollow area; A side of the protrusion close to the bottom plate and a side of the top plate close to the bottom plate are both provided with shock-absorbing pads.

3. The test method for the multi-vehicle salvo water exit experiment under a decompression environment according to claim 2, characterized in that: The outer wall of the protrusion is provided with a sealing layer.

4. The method for testing a multi-vehicle salvo water exit experiment under a decompression environment according to claim 1, characterized in that: A support column is provided on a side of the bottom plate away from the top plate, and a suction cup is connected to one end of the support column away from the bottom plate, and the side of the suction cup away from the support column is in contact with the ground, and the suction cup is provided corresponding to the support column; The number of the support columns is at least 3, and at least 3 support columns are arranged in an array around the center of the base plate.

5. The method for testing a multi-vehicle salvo water exit experiment under a decompression environment according to claim 1, characterized in that: The bottom plate is provided with a drain outlet, and the drain outlet is provided with a switch.

6. The method for testing a multi-vehicle salvo water exit experiment under a decompression environment according to claim 1, characterized in that: The side wall of the decompression water tank is provided with at least two transparent windows, and the high-speed camera faces the transparent windows; A fill light is arranged outside the decompression water tank, and the fill light faces the transparent window.

7. The method for testing a multi-vehicle salvo water exit experiment under a decompression environment according to claim 1, characterized in that: The synchronizer is electrically connected to the high-speed camera via a high-speed camera control computer, and the synchronizer is electrically connected to the guide rail module via the guide rail control computer.

8. The method for testing a multi-vehicle salvo water exit experiment under a decompression environment according to claim 1, characterized in that: Before starting the air compressor, the steps include: Set the position of the high-speed camera, set the position of the light, set the shooting parameters of the high-speed camera, set the preset pressure for the negative pressure display, and set the preset speed, the preset direction and the preset order for the synchronizer.

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