Launch speed, angle and timing adjustable vehicle parallel-in-water test device

Abstract

The launching speed, angle and timing adjustable navigation body parallel water entry test device belongs to the field of cross-medium navigation body water entry, and aims to solve the problems of the existing parallel water entry test equipment.The device comprises an electromagnetic gun launching platform, an angle adjusting frame and a test pool;the electromagnetic gun launching platform is used for launching projectiles into the test pool in parallel;the angle adjusting frame is used for adjusting the launching angle of the electromagnetic gun launching platform;the electromagnetic gun launching platform is provided with m sections of coils along the length direction on the upper barrel and the lower barrel;one photoelectric switch is arranged between two adjacent sections of coils;when the microcontroller outputs an instruction to make the upper barrel trigger switch M1 closed, the trigger capacitor group C1 discharges to the coil L1, so that the projectile moves forward along the upper barrel;and the same is true until the capacitor group Cm discharges to the coil Lm, so that the projectile is launched from the upper barrel;the lower barrel control part controls the lower barrel to launch the projectile;and the microcontroller controls the time interval of the upper barrel and the lower barrel to launch the projectile by controlling the triggering time sequence of M1 and M2.

Description

Technical Field

[0001] The present invention relates to the parallel water entry direction of a navigation body, and specifically to technologies of precise controllable launch speed, adjustable launch angle, adjustable water entry spacing, and adjustable launch timing, belonging to the field of cross-medium navigation body water entry. Background Art

[0002] my country's vast territory and vast territorial waters, while providing it with vast marine resources, also present significant challenges to its maritime rights and interests and sovereignty. In today's complex international landscape, territorial waters security has become particularly crucial, requiring a strong national defense foundation. China's coastal defense missile system can be summed up in four words: "saturation attack."

[0003] In modern naval warfare, "saturation attacks" have become the primary combat method for striking surface ship formations and underwater targets. When attacking underwater targets, underwater weapons such as air-dropped torpedoes and supercavitating weapons undergo a cross-medium process, transitioning from one medium to another. During a saturation attack, these cross-medium processes, either serial or parallel, occur, involving not only complex flow patterns but also the interaction between different vehicles, further complicating the entry process.

[0004] Currently, the primary method for conducting water-entry tests on vehicles is to use compressed gas as a propulsion system. This method suffers from poor speed controllability, and the observed cavitation morphology is significantly influenced by the trailing air mass. Furthermore, most studies focus on single vehicles. Even when using high-pressure gas as a power source for parallel water-entry tests, achieving fully synchronized entry is nearly impossible. Consequently, high-precision parallel water-entry test equipment is lacking. Summary of the Invention

[0005] In view of the problems existing in the existing parallel water entry test equipment, the present invention provides a parallel water entry test device for a navigation body with adjustable launch speed, angle and timing.

[0006] The parallel water entry test device for a navigation body with adjustable launch speed, angle, and timing of the present invention comprises an electromagnetic gun launch platform 100, an angle adjustment frame 200, and a test pool 300. The electromagnetic gun launch platform 100 is used to launch projectiles in parallel into the test pool 300, and the angle adjustment frame 200 is used to adjust the launch angle of the electromagnetic gun launch platform 100.

[0007] The electromagnetic gun launch platform 100 includes a platform 1, an upper gun barrel 2, a lower gun barrel 3, a coil 4, a photoelectric switch 5, a capacitor group 6, a gun hoop assembly 7 and a control unit;

[0008] The upper gun barrel 2 and the lower gun barrel 3 are fixed side by side on the platform 1 through a plurality of gun hoop assemblies 7;

[0009] The upper barrel 2 and the lower barrel 3 are both wound with m segments of coil 4 along the length direction. The m segments of coil 4 on each barrel are sequentially L1, L2, ..., Lm. A photoelectric switch 5 is set between two adjacent segments of coil 4, which are sequentially SQ1, SQ2, ..., SQ m-1 ;

[0010] A 2m capacitor bank 6 and a control unit are provided inside the platform 1;

[0011] The control unit includes a microcontroller, an upper barrel control unit and a lower barrel control unit. The upper barrel control unit and the lower barrel control unit have the same structure. The upper barrel control unit includes a DC power supply VCC1, a boost module U1, a boost switch SB1, an upper barrel trigger switch M1 and thyristors TH1 to THm. A group of capacitors 6 are respectively connected in parallel at both ends of the coils L1, L2, ..., Lm. The m groups of capacitors 6 are C1, C2, ..., Cm in sequence. The boost switch SB1 is closed to make the boost module U1 convert the DC power supply VC C1 boosts the output voltage and charges C1, C2, ..., Cm at the same time. When the microcontroller outputs an instruction to close the upper gun trigger switch M1, the thyristor TH1 is triggered to conduct, causing the capacitor group C1 to discharge into the coil L1, causing the projectile to move forward along the upper gun barrel. When the photoelectric switch SQ2 detects the projectile passing, it triggers the thyristor TH2 to conduct, causing the capacitor group C2 to discharge into the coil L2, maintaining the projectile's forward movement. This continues, and so on, until the capacitor group Cm discharges into the coil Lm, causing the projectile to be launched from the upper gun barrel 2.

[0012] The lower barrel control unit controls the lower barrel 3 to launch projectiles. The lower barrel control unit is provided with a lower barrel trigger switch M2. The microcontroller controls the time interval between the upper and lower barrels launching projectiles by controlling the trigger timing of M1 and M2.

[0013] Preferably, the microcontroller sends trigger signal 1 to the upward gun trigger switch M1 through the No. 1 MOS tube switch control board; the microcontroller sends trigger signal 2 to the downward gun trigger switch M2 through the No. 2 MOS tube switch control board; the timing of trigger signal 1 and trigger signal 2 is issued to the microcontroller by the computer, and when the launch button is pressed, the microcontroller sends trigger signal 1 and trigger signal 2 according to the predetermined timing.

[0014] Preferably, a fan 9 is also included. The fan 9 is arranged inside the platform and is used to cool the capacitor group 6. The microcontroller sends a trigger signal 3 to the cooling switch M3 through the No. 3 MOS tube switch control board. The cooling switch M3 is used to control the switch of the fan 9.

[0015] Preferably, a high-speed camera is also included, which is used to observe the projectile entering the water test. The microcontroller sends a trigger signal 4 to the high-speed camera through the No. 4 MOS tube switch control board to control the high-speed camera switch.

[0016] Preferably, the angle adjustment frame 200 adjusts the launch angle of the electromagnetic gun launch platform 100 to between 0 and 90 degrees.

[0017] Preferably, the gun clamp assembly 7 includes an upper clamp block 7-1, a middle clamp block 7-2, a lower clamp block 7-3 and a gun clamp fastening bolt 7-4, the lower clamp block 7-3 is fixed to the platform 1 by the gun clamp fastening bolt 7-4, the upper clamp block 7-1, the middle clamp block 7-2 and the lower clamp block 7-3 are fixed together from top to bottom by the gun clamp fastening bolt 7-4, the middle clamp block 7-2 and the lower clamp block 7-3 cooperate to clamp the lower gun barrel 3, the middle clamp block 7-2 and the upper clamp block 7-1 cooperate to clamp the upper gun barrel 2, and the distance between the upper gun barrel 2 and the lower gun barrel 3 is adjusted by adjusting the height of the middle clamp block 7-2.

[0018] Preferably, a projectile holder 11 is further included. The projectile holder 11 is arranged at the head end of the upper barrel 2 and the lower barrel 3. The projectile holder 11 includes a lower supporting block 11-1, an upper supporting block 11-2, a fixing ring 11-3 and a magnet block 11-4. One end of the projectile 10 is inserted into the head end of the barrel, and the suspended end of the projectile 10 is supported by an L-shaped structure formed by the upper supporting block 11-2 and the lower supporting block 11-1. The fixing ring 11-3 is sleeved on the outside of the head end of the barrel, and the fixing ring 11-3 is fixedly connected to one end of the upper supporting block 11-2.

[0019] A magnet block 11 - 4 is embedded in the lower supporting block 11 - 1 , and the magnet block 11 - 4 is used to generate magnetic force to fix the projectile 10 .

[0020] Preferably, the platform 1 is packaged with an acrylic plate and is compressed and fixed using six fastening screws 8 .

[0021] Preferably, the microcontroller adopts an STM32F103RC chip.

[0022] Beneficial Effects of the Invention: This invention aims to achieve high-speed, high-precision water entry for parallel vehicles, enabling research into the effects of parameters such as entry velocity, entry spacing, entry angle, entry time interval, entry sequence, and projectile type on the evolution of the parallel entry flow field and the loaded trajectory of the vehicle. The invention offers advantages such as high velocity controllability, and experimentally observed cavitation is unaffected by the presence of a trailing air mass. Furthermore, the invention can also launch hollow projectiles in an annular cavity, a feat not directly achievable with compressed gas-powered devices.

[0023] Considering the characteristics of parallel water entry and the repeatability of the test, the requirements include stable and controllable water entry speed, adjustable water entry spacing, adjustable launch angle and timing, observable complete cavitation morphology, and reliable launch device. According to the present invention, a parallel (electromagnetic gun) water entry test system capable of launching projectiles with an outer diameter of 6mm (D) has been constructed. This test system can conduct parallel water entry tests with water entry speeds of 5-120m / s, water entry angles of 0-90°, launch intervals of 0-2s (with an accuracy of 1us), water entry spacings of 18mm-60mm (3D-10D), and projectile types (solid or hollow). BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the electromagnetic gun launch platform, which is the core component of the parallel water entry test device for navigation bodies with adjustable launch speed, angle and timing according to the present invention;

[0025] Figure 2 This is a partial enlarged view of the electromagnetic gun launch platform;

[0026] Figure 3 It is a structural diagram of the gun hoop assembly in the electromagnetic gun launching platform;

[0027] Figure 4 It is a structural diagram of the projectile holder in the electromagnetic gun launch platform;

[0028] Figure 5 This is the principle block diagram of the timing control of the electromagnetic gun launch platform;

[0029] Figure 6 This is the launch control principle diagram of the electromagnetic gun launch platform, where Figure 6 (a) is the schematic diagram of the upper barrel launch control. Figure 6 (b) is the schematic diagram of the lower barrel launch control. Figure 6 (c) is the fan cooling principle diagram;

[0030] Figure 7 Schematic diagram of the structure of the parallel water entry test device for a vehicle with adjustable launch speed, angle and timing (oblique water entry mode) according to the present invention;

[0031] Figure 8 This is a schematic diagram of the test structure with a water entry angle of 90 degrees (vertical water entry mode);

[0032] Figure 9 It is a schematic diagram of the test structure with an entry angle of 0 degrees (horizontal entry mode). DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0036] Specific implementation method 1: Figures 1 to 9 This embodiment describes a parallel water entry test device for a vehicle with adjustable launch speed, angle, and timing, comprising an electromagnetic gun launch platform 100, an angle adjustment frame 200, and a test pool 300. The electromagnetic gun launch platform 100 is used to launch projectiles in parallel into the test pool 300, and the angle adjustment frame 200 is used to adjust the launch angle of the electromagnetic gun launch platform 100. The angle adjustment frame 200 adjusts the launch angle of the electromagnetic gun launch platform 100 to between 0 and 90 degrees. Figure 9 This is a schematic diagram of the test structure with a water entry angle of 0 degrees. Figure 8 It is a schematic diagram of the test structure with a water entry angle of 90 degrees; Figure 7 This is a schematic diagram of the test structure for any angle of entry between 0 and 90 degrees. The general process is as follows: During the test preparation phase, water tank 300 is filled with water to the required test level. Electric energy serves as the power source for the electromagnetic gun. 12V DC power (respectively as VCC1 to VCC3) is connected to the electromagnetic gun launch platform 100 through a control unit, which controls the entire launch process. Pressing the charge button charges the capacitor bank through the boost module. When the capacitor bank voltage reaches the test value, charging stops and preparation for launch is made. Pressing the launch button launches the projectile into the water, completing the test. The next test preparation phase then begins.

[0037] Specifically, the electromagnetic gun launch platform 100 includes a platform 1, an upper gun barrel 2, a lower gun barrel 3, a coil 4, a photoelectric switch 5, a capacitor group 6, a gun hoop assembly 7 and a control unit;

[0038] The upper gun barrel 2 and the lower gun barrel 3 are fixed side by side on the platform 1 through a plurality of gun hoop assemblies 7;

[0039] The upper barrel 2 and the lower barrel 3 are both wound with m segments of coil 4 along the length direction. The m segments of coil 4 on each barrel are sequentially L1, L2, ..., Lm. A photoelectric switch 5 is set between two adjacent segments of coil 4, which are sequentially SQ1, SQ2, ..., SQm-1 ;

[0040] A 2m capacitor bank 6 and a control unit are provided inside the platform 1;

[0041] The control unit includes a microcontroller, an upper barrel control unit and a lower barrel control unit. The upper barrel control unit and the lower barrel control unit have the same structure. The upper barrel control unit includes a DC power supply VCC1, a boost module U1, a boost switch SB1, an upper barrel trigger switch M1 and thyristors TH1 to THm. A group of capacitors 6 are respectively connected in parallel at both ends of the coils L1, L2, ..., Lm. The m groups of capacitors 6 are C1, C2, ..., Cm in sequence. The boost switch SB1 is closed to make the boost module U1 convert the DC power supply VC C1 boosts the output voltage and charges C1, C2, ..., Cm at the same time. When the microcontroller outputs an instruction to close the upper gun trigger switch M1, the thyristor TH1 is triggered to conduct, causing the capacitor group C1 to discharge into the coil L1, causing the projectile to move forward along the upper gun barrel. When the photoelectric switch SQ2 detects the projectile passing, it triggers the thyristor TH2 to conduct, causing the capacitor group C2 to discharge into the coil L2, maintaining the projectile's forward movement. This continues, and so on, until the capacitor group Cm discharges into the coil Lm, causing the projectile to be launched from the upper gun barrel 2.

[0042] Combine Figure 1 The electromagnetic gun launch platform 100 is described below. Considering the high voltage risk associated with the device, it is encapsulated in an insulating acrylic sheet and secured with six tightening screws 8. Two gun barrels, each with a 13-stage coil 4 and a photoelectric switch 5, are secured to the platform 1 along the direction of gravity using a gun collar assembly 7 and bolts. The electromagnetic gun's power supply, charging, triggering, and voltage signals are connected to the control unit via a watertight connector at the rear, an aviation plug, and cables.

[0043] Combine Figure 5 、 6The entire circuitry of the device is explained below. The boost modules U1 / U2 are controlled by boost switches SB1 / SB2. When these switches are closed, the two capacitor banks C1, C2, ..., Cm in the upper and lower barrels begin charging. Charging stops when the voltage reaches the test value. Launching is controlled by the upper / lower barrel trigger switches M1 / M2. The principle is to input a small current into the thyristor (SCR), turning on the corresponding SCR in coil 1. This discharges the capacitor bank C1 in coil L1, generating a magnetic field in the first-stage coil L1 and providing propulsion for projectile 10. When projectile 10 reaches the photoelectric switch SQ1 at the front of the second-stage coil L2, SQ1 triggers and generates a current that excites the thyristor TH1, discharging the capacitor bank C2 in coil L2. This generates a magnetic field in the second-stage coil L2, further providing propulsion for projectile 10. This process continues in this manner until the 13th stage is reached, at which point projectile 10 is ejected from the muzzle. The firing principles for both the upper and lower barrels are identical. To ensure safe and stable operation of the boost module, an air cooling system is designed to dissipate heat from the boost module. Fan 9 is installed inside the platform to cool capacitor bank 6. The microcontroller sends a trigger signal 3 to cooling switch M3 via the MOSFET switch control board (3). Cooling switch M3 controls the fan 9 on and off.

[0044] The lower barrel control unit controls the lower barrel 3 to fire the projectile. The lower barrel control unit is provided with a lower barrel trigger switch M2. The microcontroller controls the time interval between the upper and lower barrels to fire the projectile by controlling the trigger timing of M1 and M2. Controlling the timing of firing is actually controlling the timing of the closing of the trigger switches of the upper and lower barrels. The schematic diagram of the control system is shown in the figure. Figure 5 The microcontroller sends trigger signal 1 to the upward cannon trigger switch M1 via the MOS transistor switch control board No. 1; the microcontroller sends trigger signal 2 to the downward cannon trigger switch M2 via the MOS transistor switch control board No. 2. The timing of trigger signals 1 and 2 is determined by the computer and transmitted to the microcontroller. When the launch button is pressed, the microcontroller sends trigger signals 1 and 2 according to the predetermined timing. The microcontroller sends trigger signal 3 to the cooling switch M3 via the MOS transistor switch control board No. 3, which controls the fan 9. The high-speed camera is used to observe the projectile entry test. The microcontroller sends trigger signal 4 to the high-speed camera via the MOS transistor switch control board No. 4 to control the high-speed camera. The microcontroller in this device uses an STM32 minimum system board to control the multiplexer. To prevent the high voltage of the capacitor bank from affecting the launch control system, the device uses MOS transistors with optocouplers to control the multiplexer. When the launch button is pressed, the microcontroller sends signals to control the triggering of the upward / downward cannon and the high-speed camera at different times. After launching a projectile, pressing the system reset button resets the microcontroller to zero and prepares for the next test. The microcontroller uses the STM32 minimum system board. By connecting to a computer, the firing timing of the upper / lower guns can be modified at any time. The chip timer has an accuracy of up to 1us.

[0045] See also Figure 3 The adjustment of the spacing between the two barrels for firing projectiles is described. The gun clamp assembly 7 includes an upper clamping block 7-1, a middle clamping block 7-2, a lower clamping block 7-3, and a gun clamp fastening bolt 7-4. The lower clamping block 7-3 is fixed to the platform 1 by the gun clamp fastening bolt 7-4. The upper clamping block 7-1, the middle clamping block 7-2, and the lower clamping block 7-3 are fixed together from top to bottom by the gun clamp fastening bolt 7-4. The middle clamping block 7-2 and the lower clamping block 7-3 cooperate to clamp the lower barrel 3. The middle clamping block 7-2 and the upper clamping block 7-1 cooperate to clamp the upper barrel 2. The spacing between the upper barrel 2 and the lower barrel 3 is adjusted by adjusting the height of the middle clamping block 7-2. Parallel spacing adjustment of 18-60mm (3D-10D) can be achieved.

[0046] See also Figure 4 To illustrate the fixation of the projectile, the projectile holder 11 is arranged at the head end of the upper barrel 2 and the lower barrel 3. The projectile holder 11 includes a lower supporting block 11-1, an upper supporting block 11-2, a fixing ring 11-3 and a magnet block 11-4. One end of the projectile 10 is inserted into the head end of the barrel, and the suspended end of the projectile 10 is supported by an L-shaped structure formed by the upper supporting block 11-2 and the lower supporting block 11-1. The fixing ring 11-3 is sleeved on the outside of the head end of the barrel, and the fixing ring 11-3 is fixedly connected to one end of the upper supporting block 11-2; a magnet block 11-4 is embedded in the lower supporting block 11-1, and the magnet block 11-4 is used to generate magnetic force to fix the projectile 10.

[0047] A projectile 10 is held in place by a projectile holder 11, with the head of the projectile 10 extending a certain distance into the barrel and the tail of the projectile 10 flush with the tail of the projectile holder 11. A magnet 11-4 embedded in the projectile holder 11 generates suction to the projectile 10, increasing friction between the projectile and the inner wall of the barrel, counteracting gravity and preventing it from sliding down, thus securing the projectile 10. This device can fire both solid and hollow projectiles, offering a wider range of projectile applications.

[0048] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in conjunction with other described embodiments.

Claims

1. A parallel water entry test device for a navigation body with adjustable launch speed, angle and timing, characterized in that: The invention comprises an electromagnetic gun launching platform (100), an angle adjustment frame (200) and a test water pool (300); the electromagnetic gun launching platform (100) is used to launch projectiles in parallel into the test water pool (300), and the angle adjustment frame (200) is used to adjust the launching angle of the electromagnetic gun launching platform (100); The electromagnetic gun launching platform (100) comprises a platform (1), an upper gun barrel (2), a lower gun barrel (3), a coil (4), a photoelectric switch (5), a capacitor group (6), a gun hoop assembly (7) and a control unit; The upper gun barrel (2) and the lower gun barrel (3) are fixed side by side on the platform (1) through a plurality of gun hoop assemblies (7); The upper barrel (2) and the lower barrel (3) are both wound with m-segment coils (4) along the length direction. The m-segment coils (4) on each barrel are sequentially A photoelectric switch (5) is set between two adjacent coils (4), which are ; A 2m capacitor group (6) and a control unit are provided inside the platform (1); The control unit includes a microcontroller, an upper barrel control unit and a lower barrel control unit. The upper barrel control unit and the lower barrel control unit have the same structure. The upper barrel control unit includes a DC power supply VCC1, a boost module U1, a boost switch SB1, an upper barrel trigger switch M1 and thyristors TH1~THm. A group of capacitors (6) are respectively connected in parallel at both ends of the coils L1, L2, ..., Lm. The m groups of capacitors (6) are C1, C2, ..., Cm in sequence. When the boost switch SB1 is closed, the boost module U1 converts the DC power supply V CC1 boosts the output voltage and charges C1, C2, ..., Cm at the same time; when the microcontroller outputs an instruction to close the upper gun trigger switch M1, the thyristor TH1 is triggered to conduct, causing the capacitor group C1 to discharge to the coil L1, causing the projectile to move forward along the upper gun barrel; when the photoelectric switch SQ2 detects that the projectile has passed, the thyristor TH2 is triggered to conduct, causing the capacitor group C2 to discharge to the coil L2, maintaining the projectile's continued forward movement, and so on, until the capacitor group Cm discharges to the coil Lm, causing the projectile to be launched from the upper gun barrel (2); The lower gun barrel control unit controls the lower gun barrel (3) to fire the projectile. The lower gun barrel control unit is provided with a lower gun trigger switch M2. The microcontroller controls the time interval between the upper and lower guns firing the projectile by controlling the trigger timing of M1 and M2. The microcontroller sends trigger signal 1 to the upward trigger switch M1 through the No. 1 MOS tube switch control board; the microcontroller sends trigger signal 2 to the downward trigger switch M2 through the No. 2 MOS tube switch control board; the timing of trigger signal 1 and trigger signal 2 is given to the microcontroller by the computer. When the launch button is pressed, the microcontroller sends trigger signal 1 and trigger signal 2 according to the predetermined timing; It also includes a projectile holder (11), which is arranged at the head ends of the upper gun barrel (2) and the lower gun barrel (3), and the projectile holder (11) includes a lower supporting block (11-1), an upper supporting block (11-2), a fixing ring (11-3) and a magnet block (11-4). One end of the projectile (10) is inserted into the head end of the gun barrel, and the suspended end of the projectile (10) is supported by an L-shaped structure formed by the upper supporting block (11-2) and the lower supporting block (11-1). The fixing ring (11-3) is sleeved on the outside of the head end of the gun barrel, and the fixing ring (11-3) is fixedly connected to one end of the upper supporting block (11-2). A magnet block (11-4) is embedded in the lower support block (11-1), and the magnet block (11-4) is used to generate electromagnetic attraction to fix the projectile (10); The platform further includes a fan (9), which is arranged inside the platform and is used to cool the capacitor group (6). The microcontroller sends a trigger signal 3 to the cooling switch M3 through the third MOS tube switch control board, and the cooling switch M3 is used to control the fan (9) to switch on and off; It also includes a high-speed camera, which is used to observe the projectile entering the water test. The microcontroller sends a trigger signal 4 to the high-speed camera through the No. 4 MOS tube switch control board to control the high-speed camera switch.

2. The parallel water entry test device for a navigation body with adjustable launch speed, angle and timing according to claim 1 is characterized in that: The angle adjustment frame (200) adjusts the launch angle of the electromagnetic gun launch platform (100) to between 0 and 90 degrees.

3. The parallel water entry test device for a navigation body with adjustable launch speed, angle and timing according to claim 1 is characterized in that: The gun hoop assembly (7) comprises an upper clamping block (7-1), a middle clamping block (7-2), a lower clamping block (7-3) and a gun hoop fastening bolt (7-4); the lower clamping block (7-3) is fixed to the platform (1) by the gun hoop fastening bolt (7-4); the upper clamping block (7-1), the middle clamping block (7-2) and the lower clamping block (7-3) are fixed together from top to bottom by the gun hoop fastening bolt (7-4); the middle clamping block (7-2) and the lower clamping block (7-3) cooperate to clamp the lower gun barrel (3); the middle clamping block (7-2) and the upper clamping block (7-1) cooperate to clamp the upper gun barrel (2); and the distance between the upper gun barrel (2) and the lower gun barrel (3) is adjusted by adjusting the height of the middle clamping block (7-2).

4. The parallel water entry test device for a vehicle with adjustable launch speed, angle, and timing according to claim 1 is characterized in that: The platform (1) is encapsulated with an acrylic plate and is compressed and fixed using 6 fastening screws (8).

5. The parallel water entry test device for a navigation body with adjustable launch speed, angle and timing according to claim 1 is characterized in that: The microcontroller uses the STM32F103RC model chip.

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