Device and method for testing cross-medium water entry of navigation body under wave condition

Abstract

The invention discloses a device and method for testing the cross-medium water entry of a navigation body under the wave condition, and relates to the technical field of missile body water entry testing equipment.The device for testing the cross-medium water entry of the navigation body under the wave condition comprises an experimental water tank, and a wave maker is arranged in the experimental water tank; the adjusting module comprises a launching platform capable of adjusting the inclination angle; the emission module comprises an emitter and a driving source, the emitter is arranged on the emission platform, the driving source is in butt joint with one end of the emitter, the other end of the emitter is provided with a rectification structure, and high-pressure gas provided by the driving source enables a carbon body loaded on the emitter to be released at a certain initial speed; the rectification structure is used for reducing interference generated by gas turbulence in the radial direction of the launcher when the projectile body leaves the launcher. According to the invention, a stable wave page is generated through the cooperation of the motion phases of the two wave generators, the process that a projectile body enters water under a real sea condition is simulated, and more accurate experimental data is provided for the design and optimization of a cross-medium motion body.

Description

Technical Field

[0001] The present application relates to the technical field of projectile water entry test equipment, and in particular to a test device and method for a navigation body to enter water across a medium under wave conditions. Background Art

[0002] With technological advancements in marine resource development, underwater exploration, and the military, the demand for cross-media water entry devices (such as submarine-launched drones, amphibious air-to-water vehicles, and high-speed water-entry projectiles) is growing. These devices face complex fluid dynamics challenges during water entry, including high-speed impact loads, cavitation effects, structural stability, and motion trajectory control. Existing projectile water entry test systems are mostly based on static water environments. A high-speed launch mechanism launches the projectile vertically or obliquely into still water, and high-speed cameras and pressure sensors are used to record data such as cavitation morphology and slamming acceleration. However, complex wave conditions (such as wind and swell) exist in real ocean environments, and the dynamic fluctuations of the wave surface can significantly affect the projectile's water entry posture, fluid dynamic characteristics, and motion stability. Traditional static water experiments cannot reproduce the coupled effects of waves and water entry, resulting in a discrepancy between experimental data and actual application scenarios, limiting the performance optimization of weapon systems or underwater equipment. Summary of the Invention

[0003] The present application aims to solve one of the above-mentioned technical problems in the prior art. To this end, an embodiment of the present application provides a test device for a navigation body entering water across a medium under wave conditions.

[0004] The embodiment of the present application also provides a test method for a test device for a navigation body entering water across a medium under wave conditions.

[0005] According to an embodiment of the first aspect of the present application, a test apparatus for a navigation body entering water across a medium under wave conditions is provided, comprising an experimental water tank, wherein a wave maker is provided in the experimental water tank, and wherein the wave maker is used to form a wave liquid surface in the water in the experimental water tank; An adjustment module, including a launch platform capable of adjusting the tilt angle; The launch module includes a launcher and a driving source. The launcher is arranged on the launch platform, the driving source is connected to one end of the launcher, and the other end of the launcher is provided with a rectifying structure. The high-pressure gas provided by the driving source enables the carbon body loaded on the launcher to be released at a certain initial velocity. The rectifying structure is used to reduce the interference along the radial direction of the launcher caused by gas turbulence when the projectile leaves the launcher.

[0006] The above-mentioned cross-medium water entry test device for a navigation body under wave conditions has at least the following beneficial effects: during the experiment, the water in the experimental water tank is formed into the required wave liquid surface through a wave maker, and after the adjustment module is adjusted to the required angle and the projectile is loaded, the driving source is started to launch the projectile at a certain initial velocity and enter the experimental water tank to complete the water entry experiment. By setting a rectifying structure at the end of the launcher to facilitate gas discharge, high-pressure gas is quickly discharged from the rectifying structure during the process of the projectile leaving the launcher, thereby reducing the lateral interference of the high-pressure gas on the projectile at the moment of leaving the barrel, ensuring the stability of the initial trajectory, and effectively solving the problem of disconnection between the static water experiment and the actual ocean environment, providing more accurate experimental data for the design and optimization of cross-medium moving bodies.

[0007] According to the test device for a navigation body entering water across a medium under wave conditions described in an embodiment of the first aspect of the present application, the launcher includes a straight cylindrical tube, and a notch cut at the upper end of the end of the straight cylindrical tube forms the rectification structure.

[0008] According to the test device for the entry of a navigation body across a medium into water under wave conditions described in the embodiment of the first aspect of the present application, the ratio of the length of the notch to the length of the projectile is set in the range of 0.65-0.8, and the ratio of the maximum width of the notch to the diameter of the straight cylindrical tube is set in the range of 0.5-0.95.

[0009] According to the test device for a navigation body entering water across a medium under wave conditions as described in the embodiment of the first aspect of the present application, the launcher includes an air tank and a connecting piece, and the connecting piece is provided with a first interface, a second interface and a third interface that are interconnected, the second interface and the third interface are coaxially arranged, the first interface is connected to the air tank, and the second interface is connected to the straight cylindrical tube, wherein a solenoid valve is provided at the connection between the air tank and the first interface, and the third interface is used for loading the projectile.

[0010] According to the test device for the entry of a navigation body across a medium into water under wave conditions described in the embodiment of the first aspect of the present application, the wave maker includes two groups of wave-making components, and the two groups of wave-making components are respectively arranged at both ends of the experimental water tank, and the wave-making components include wedge blocks that can perform linear reciprocating motion in the vertical direction.

[0011] According to the test device for a navigation body entering water across a medium under wave conditions described in an embodiment of the first aspect of the present application, wave-making inclined surfaces are provided on the opposite sides of the wedge blocks, and the wave-making inclined surface of one wedge block is inclined toward the other wedge block.

[0012] According to the test device for the entry of a navigation body across a medium into water under wave conditions described in the embodiment of the first aspect of the present application, the inclination angle of the wave-making slope compared to the horizontal plane is set to 30°~60°.

[0013] According to the test device for entry of a navigation body across a medium into water under wave conditions described in the embodiment of the first aspect of the present application, the top surface of the wedge block is a plane, and the plane is adjacent to the wave-making slope.

[0014] According to the test device for a navigation body entering water across a medium under wave conditions as described in the embodiment of the first aspect of the present application, lighting sources are provided on both sides of the upper part of the experimental water tank, and a cover is provided on the top of the end of the experimental water tank away from the emission module.

[0015] According to an embodiment of the second aspect of the present application, a test method is provided, based on the above-mentioned test device for the entry of a navigation body across a medium into water under wave conditions, comprising the following steps: Start the wave maker to make the water in the experimental tank form simulated waves with preset waveform, wave height and period; Adjust the inclination angle of the launch platform, install the sensor on the projectile, load the projectile into the launcher and pull it with cotton thread; After the camera and the illumination light source are started, the driving source is started to make the projectile enter the experimental water tank at a preset initial velocity, and the process of the projectile entering the water is recorded by the camera.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application is further described below with reference to the accompanying drawings and embodiments; Figure 1 2 is a schematic structural diagram of a test device for a navigation body entering water across a medium under wave conditions according to an embodiment of the present application; Figure 2 1 is a schematic diagram of the connection between the regulating module and the transmitting module in an embodiment of the present application; Figure 3 is a structural diagram of a transmitter in an embodiment of the present application; Figure 4 This is a schematic diagram of the structure of the experimental water tank in the embodiment of this application. Figure 1 ; Figure 5 This is a schematic diagram of the structure of the experimental water tank in the embodiment of this application. Figure 2 ; Figure 6 It is a structural diagram of a wave maker in an embodiment of the present application.

[0018] Figure numerals: launch module 100, launcher 110, slot 111, connector 120, gas tank 130, adjustment module 200, frame 210, regulator 220, launch platform 230, positioning assembly 240, experimental water tank 300, wave maker 320, driving member 321, wedge block 322, illumination light source 330, cover plate 340. DETAILED DESCRIPTION

[0019] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0020] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0021] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0022] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0023] Reference Figure 1 and Figure 2 An embodiment of the present application provides a test device for a navigation body entering water across a medium under wave conditions, including an experimental water tank 300, an adjustment module 200 and a launch module 100.

[0024] The experimental water tank 300 is provided with a wave maker, which is used to form a wavy liquid surface in the water in the experimental water tank 300.

[0025] The launching module 100 is disposed on the launching platform 230 of the adjusting module 200 , wherein the inclination angle of the launching platform 230 is adjustable, and different launching angles can be adjusted according to needs.

[0026] The launch module 100 includes a launcher 110 and a driving source. The launcher 110 is set on the launch platform 230. The driving source is connected to one end of the launcher 110. The other end of the launcher 110 is provided with a rectifying structure. The high-pressure gas provided by the driving source enables the projectile loaded on the launcher 110 to be released at a certain initial velocity. The rectifying structure is used to reduce the interference along the radial direction of the launcher 110 caused by gas turbulence when the projectile leaves the launcher 110.

[0027] During the experiment, a wave maker is used to form the required simulated waves in the water of the experimental water tank 300. After the adjustment module 200 is adjusted to the required angle and the projectile is loaded, the driving source is started to release high-pressure gas, so that the projectile is launched at a certain initial velocity and enters the experimental water tank 300 to complete the water entry experiment. A rectifying structure is set at the end of the launcher 110 to facilitate gas discharge. When the projectile leaves the launcher 110, the high-pressure gas is quickly discharged from the rectifying structure to form an asymmetric gas flow field, thereby reducing the lateral interference of the high-pressure gas on the projectile at the moment of leaving the barrel, ensuring the stability of the initial trajectory, effectively solving the problem of disconnection between the static water experiment and the actual ocean environment, and providing more accurate experimental data for the design and optimization of cross-medium moving bodies.

[0028] The use of the wave maker of the present application can reduce the length of the experimental water tank 300, save space and manufacturing costs, and can also create a pre-set wave liquid surface.

[0029] The cross-medium water entry test device for a navigation body under wave conditions in this application can dynamically adjust wave parameters (wave height, wavelength, period) through a wave maker, simulate the water entry process of a projectile under real sea conditions, solve the problem of disconnection between static water experiments and the actual ocean environment, and provide more accurate experimental data for the design and optimization of cross-medium moving bodies.

[0030] In some embodiments, such as Figure 2 As shown, the adjustment module 200 also includes a frame 210 and a regulator 220. One end of the launch platform 230 is hinged to the end of the frame 210 close to the experimental water tank 300, and the other end of the launch platform 230 is hingedly connected to the telescopic end of the regulator 220. The fixed end of the regulator 220 is rotatably connected to the frame 210. The inclination angle of the launch platform 230 can be adjusted by extending or retracting the telescopic end of the regulator 220.

[0031] When the launching platform 230 is placed in a horizontal direction, the launching platform 230 is higher than the experimental water tank 300 .

[0032] The regulator 220 uses a hydraulic cylinder, which makes the adjustment of the launch platform 230 more precise.

[0033] In some embodiments, such as Figure 2 and Figure 3As shown, launcher 110 comprises a straight circular tube with a notch 111 cut into the upper end to form a rectifying structure. Notch 111, with an upper half open, is positioned at the outlet of the straight circular tube. This creates an asymmetric gas flow field at the outlet of the tube during launch, allowing high-pressure gas to be rapidly discharged preferentially through notch 111. This reduces lateral interference from high-pressure gas turbulence on the projectile at the moment of exit, ensuring initial trajectory stability.

[0034] In some embodiments, the ratio of the length of the notch 111 to the length of the elastic body is set to a range of 0.65-0.8, and the ratio of the maximum width of the notch 111 to the diameter of the straight tube is set to a range of 0.5-0.95.

[0035] When the projectile moves within the straight cylindrical tube, the upper half of the tube's exit is released prematurely due to the missing tube wall, potentially inducing a slight pitching moment. By precisely controlling the cutting length of the notch 111 and the length of the projectile, or the distance from the center of mass of the carbon body to the end of the projectile, the projectile can be positioned at a preset angle of attack (e.g., 1-2 degrees of pitch) upon exiting the barrel, facilitating subsequent attitude adjustments in mid-flight. This slight preset angle of attack generates aerodynamic lift in mid-flight, partially offsetting the downward force due to gravity and flattening the trajectory.

[0036] In some specific embodiments, straight cylindrical tubes can be arranged in various styles according to different projectile sizes. In order to facilitate the rapid loading of different types of straight cylindrical tubes on the launch platform 230, a plurality of groups of positioning components 240 are arranged in an array on the launch platform 230. The positioning component 240 includes a first positioning block and a second positioning block. The first positioning block is fixed to the launch platform 230. The first positioning block is provided with a first clamping groove for positioning the straight cylindrical tube. The second positioning block is connected to the first positioning block by screws, wherein the second positioning block is provided with a second clamping groove on the side facing the first positioning block. The first slot and the second slot are combined to form a positioning groove for clamping the straight cylindrical tube. In the embodiment of the present application, the shape of the clamping groove is V-shaped.

[0037] In some embodiments, the launcher 110 includes a gas tank 130 and a connector 120, the connector 120 is provided with a first interface, a second interface and a third interface that are interconnected, the second interface and the third interface are coaxially arranged, the first interface is connected to the gas tank 130, and the second interface is connected to the straight cylindrical tube, wherein an electromagnetic valve is provided at the connection between the gas tank 130 and the first interface, and the third interface is used for loading the projectile.

[0038] The gas storage tank 130 is used to store the high-pressure air generated by the air compressor. The tank mouth of the gas storage tank 130 is connected to the solenoid valve, which is used as a cutoff to control the release of the high-pressure gas.

[0039] In some embodiments, such as Figure 5As shown, the wave generator includes two sets of wave-making assemblies 320, one at each end of the experimental water tank. Each wave-making assembly 320 includes a wedge-shaped block 322 capable of linear reciprocating motion in the vertical direction. The wedge-shaped block 322 farther from the transmitting module 100 actively moves up and down to generate an incident wave, while the wedge-shaped block 322 closer to the transmitting module 100 also actively moves up and down to generate a wave with a phase opposite to that of the incident wave.

[0040] When the incident wave propagates to one end of the experimental water tank 300 close to the transmitting module 100, the movement of the wedge block 322 there pushes the water body, generating a reverse wave. The interference between the incident wave and the reverse wave causes the wave energy to be partially offset, thereby reducing the formation of the reflected wave and avoiding the experimental area from being affected by the differential reflection interference caused by the incident wave colliding with the inner wall of the experimental water tank 300.

[0041] In this embodiment, the two wedges 322 move at different phases (e.g., 180° apart), enabling coverage of a wider wave cycle. For example, one wedge 322 moves upward while the other moves downward. This staggered design enhances dynamic response, adapting to incident waves of varying frequencies and wavelengths and improving wave absorption efficiency. Adjustment of the phase difference can be achieved through a real-time feedback control system to match changing wave conditions.

[0042] In some embodiments, such as Figure 6 The wedge blocks 322 are provided with wave-making inclined surfaces on the opposite sides thereof, wherein the wave-making inclined surface of one wedge block 322 is inclined toward the other wedge block. The provision of the wave-making inclined surfaces enables the movement of the wedge blocks 322 to generate more regular and stable incident waves.

[0043] In some embodiments, the wave-making slope is tilted at an angle of 30° to 60° relative to the horizontal plane. Within this range, the waves generated by the wave-making slope are more regular and stable. In the embodiment provided in this application, the tilt angle of the wave-making slope is set to 45°.

[0044] In some embodiments, the top surface of the wedge block 322 is a plane adjacent to the wave-generating slope. The top surface of the wedge block 322 is used to create reverse waves so as to offset the interference of the rebound of the incident wave on the generated waves.

[0045] The design of the wave-generating slope optimizes water guidance: during upward movement, the wave-generating slope and the flat surface push the water upward, forming a reverse wave crest; during downward movement, the wave-generating slope lowers the local water level, forming a reverse wave trough. This geometry enhances energy dissipation while reducing direct impact on the mechanical structure.

[0046] In the embodiment of the present application, the wave maker further includes a driving member 321, which is used to drive the wedge block to perform linear reciprocating motion, wherein the driving member 321 can be an electric push rod, a cylinder or a hydraulic cylinder.

[0047] In some embodiments, illumination light sources 330 are provided on both sides of the upper portion of the experimental water tank 300 . The illumination light sources 330 are used to enable a high-speed camera to more clearly capture the process of the projectile entering the water.

[0048] A cover plate 340 is installed on the top of the end of the experimental water tank 300 away from the launch module 100. This effectively reduces the impact of splashing water in the water entry area. It also prevents "skipping" during shallow-angle water entry experiments, preventing the experimental projectile from jumping out and potentially damaging equipment outside the tank.

[0049] In some embodiments, the present application further provides a test method for a test device for a navigation body entering water across a medium under the above-mentioned wave conditions, comprising the following steps: Activate the wave generator to cause the water in the experimental water tank 300 to form simulated waves with a preset waveform, wave height, and period; Adjust the inclination angle of the launch platform 230, install the sensor on the projectile, load the projectile into the launcher 110 and pull it with cotton thread; After the camera and the illumination light source 330 are started, the driving source is started to make the projectile enter the experimental water tank 300 at a preset initial velocity, and the process of the projectile entering the water is recorded by the camera.

[0050] The more specific implementation process is as follows: The water quality maintenance system of the experimental water tank 300 is turned off to prevent the circulating water flow from affecting the experimental environment.

[0051] Open the wave maker and input the desired wave height, period, waveform and other data.

[0052] The adjustment module 200 is opened to adjust the tilt angle of the launch platform 230 .

[0053] After setting the time insurance and trigger threshold, unscrew the body and install the sensor.

[0054] Loosen the third interface and install the experimental projectile.

[0055] The air compressor is turned on to start delivering high-pressure gas to the gas storage tank 130 .

[0056] Adjust the position of the cover plate 340, turn on the lighting source 330, and confirm that the high-speed camera and other equipment remain in normal working condition.

[0057] Open the solenoid valve remotely and close it after the pressure indicator returns to zero. After the projectile loses speed, fish it out and remove the sensor.

[0058] Among them, a reference wave (such as medium height and regular waveform) is generated through the control panel, the actual measured value of the sensor is compared with the theoretical value, and the driving parameters of the wave maker are adjusted until the wave parameter error reaches a stable and acceptable range.

[0059] In the control interface, simply enter the target wave height (e.g., 0.1m, 0.5m, etc.). The system will automatically calculate the swing amplitude or air pressure intensity of the wave maker's wave plate 320. For irregular waves, you can set the average or maximum wave height and fine-tune the parameters through multiple tests. Enter the target wave period (e.g., 2 seconds, 4 seconds, etc.) to control the swing amplitude of the wave maker's wave plate 320 or the frequency of the air pressure pulses. To generate complex periods (such as a superposition of long and short waves), select "Multi-Period Superposition" mode in the waveform settings and enter the parameters separately. For regular waves, simply select a preset waveform such as "Sine" or "Elliptical."

[0060] Irregular Waves: Select "Random Wave" mode and enter the statistical characteristics of wave height (such as average wave height and maximum wave height) or select an ocean wave spectrum (such as wind wave spectrum and swell wave spectrum) as required. After the wave generator is activated to generate waves, sensors monitor the actual wave height, period, and other parameters in real time. If the measured values ​​differ significantly from the target values, gradually adjust the drive signal strength or frequency until the generated waves meet the experimental requirements.

[0061] The sensor's timer setting is determined by the time required to complete a single test. Once the timer setting is reached, the sensor enters a ready-to-trigger state. The trigger threshold is typically set to 1-2g, based on the ability to detect acceleration during each phase: high-pressure gas, water impact, and wall (bottoming out).

[0062] In some embodiments, before installation into the launcher 110, a cotton string is tied to the tail of the test projectile. This string is then pressed down when the third interface is closed. This prevents the projectile from sliding during the inflation phase. Generally, depending on the design and material of the launcher 110, each device should first undergo a free-fall test to determine the maximum angle at which it will not slide. Furthermore, the string ensures sufficient acceleration distance, preventing the projectile from rapidly sliding upon contact with the high-pressure gas during the deflation phase, which could increase the volume of the barrel tail and reduce the test pressure. Furthermore, during the deflation phase, as the projectile exits launcher 110, the pressure drops rapidly. The solenoid valve closes when the pressure sensor connected to the gas tank 130 drops to zero. Leaving the solenoid valve open for extended periods can shorten its service life and cause leakage. On the other hand, closing the solenoid valve after deflation is complete reduces the daily pressure in gas tank 130, extending the service life of equipment components.

[0063] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A test device for a navigation body entering water across a medium under wave conditions, characterized by: include An experimental water tank, wherein a wave maker is provided in the experimental water tank, and the wave maker is used to form a wavy liquid surface in the water in the experimental water tank; An adjustment module, including a launch platform capable of adjusting the tilt angle; The launch module includes a launcher and a driving source. The launcher is arranged on the launch platform, the driving source is connected to one end of the launcher, and the other end of the launcher is provided with a rectifying structure. The high-pressure gas provided by the driving source enables the carbon body loaded on the launcher to be released at a certain initial velocity. The rectifying structure is used to reduce the interference along the radial direction of the launcher caused by gas turbulence when the projectile leaves the launcher.

2. The device for testing the entry of a navigation body across a medium into water under wave conditions according to claim 1, characterized in that: The emitter comprises a straight circular tube, and a notch cut at the upper end of the end portion of the straight circular tube forms the rectifying structure.

3. The device for testing the entry of a navigation body across a medium into water under wave conditions according to claim 2, characterized in that: The ratio of the length of the notch to the length of the elastic body is set to a range of 0.65-0.8, and the ratio of the maximum width of the notch to the diameter of the straight cylindrical tube is set to a range of 0.5-0.

95.

4. The device for testing the entry of a navigation body across a medium into water under wave conditions according to claim 2, characterized in that: The launcher includes a gas tank and a connecting piece, the connecting piece is provided with a first interface, a second interface and a third interface which are interconnected, the second interface and the third interface are coaxially arranged, the first interface is connected to the gas tank, and the second interface is connected to the straight cylindrical tube, wherein a solenoid valve is provided at the connection between the gas tank and the first interface, and the third interface is used for loading the projectile.

5. The device for testing the entry of a navigation body across a medium into water under wave conditions according to claim 1 is characterized in that: The wave maker includes two groups of wave-making components, which are respectively arranged at two ends of the experimental water tank. The wave-making components include wedge-shaped blocks that can perform linear reciprocating motion in a vertical direction.

6. The device for testing the entry of a navigation body across a medium into water under wave conditions according to claim 5, characterized in that: Wave-making inclined surfaces are provided on opposite sides of the wedge-shaped blocks, wherein the wave-making inclined surface of one wedge-shaped block is inclined toward the other wedge-shaped block.

7. The device for testing the entry of a navigation body across a medium into water under wave conditions according to claim 6, characterized in that: The inclination angle of the wave-making slope compared to the horizontal plane is set to 30°~60°.

8. The device for testing the entry of a navigation body across a medium into water under wave conditions according to claim 7, characterized in that: The top surface of the wedge-shaped block is a plane, and the plane is adjacent to the wave-making inclined surface.

9. The device for testing the entry of a navigation body across a medium into water under wave conditions according to claim 1, characterized in that: Both sides of the upper part of the experimental water tank are provided with lighting sources, and a cover plate is provided on the top of one end of the experimental water tank away from the emission module.

10. A test method, based on the test device for a navigation body entering water across a medium under wave conditions according to any one of claims 1 to 9, characterized in that: The steps include: Start the wave maker to make the water in the experimental tank form simulated waves with preset waveform, wave height and period; Adjust the inclination angle of the launch platform, install the sensor on the projectile, load the projectile into the launcher and pull it with cotton thread; After the camera and the illumination light source are started, the driving source is started to make the projectile enter the experimental water tank at a preset initial velocity, and the process of the projectile entering the water is recorded by the camera.

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