Redundant underwater trajectory measurement experimental device

Abstract

The application provides a redundant underwater trajectory measurement experiment device, which comprises a buoyancy cabin shell body, buoyancy material in the buoyancy cabin shell body, a connecting bottom arranged in the connecting part of the buoyancy cabin shell body and a test cabin shell body, a base plate arranged on the side edge of the connecting bottom close to the buoyancy material, a push-out device arranged in the connecting bottom, a gas bag connected to the transition ring, an inflation module arranged on the transition ring, and the inflation module being in communication with the gas bag; the push-out device is started to push the base plate to move towards the head part, so that the head part is separated from the buoyancy cabin shell body, and the buoyancy material is pushed out of the buoyancy cabin shell body by the base plate; and / or the inflation module inflates the gas bag, and the gas bag is expanded and opened. The piston cavity is filled with low-density foaming material, the shearing separation ball head is pushed out by gas, the foaming material is pushed out, a combined buoyancy guarantee scheme of cavity and low-density material is formed, relatively large buoyancy performance is provided in a small axial space, and the redundant recovery capability is formed together with the rear end floating bag.

Description

Technical Field

[0001] This invention relates to the field of underwater measurement equipment technology, specifically to a redundant underwater ballistic measurement experimental device, and more particularly to a redundant cross-medium aircraft underwater recovery ballistic measurement experimental device. Background Technology

[0002] The ocean, as the most convenient and economical medium connecting the world, serves as a vital carrier for information exchange among nations and plays a central role in global trade and exchange activities. Given the ocean's crucial position and value, relevant maritime nations have developed various surface and underwater marine equipment. Equipped with different functional payloads, these equipment perform corresponding tasks to seek and safeguard their maritime rights and security. With continuous advancements in science and technology, these marine equipment increasingly exhibit trends towards unmanned operation, long-range capabilities, intelligence, and information technology, significantly enhancing their stealth and mobility, posing considerable challenges to maritime regional defense. In response to this situation, establishing a coordinated system of fixed and mobile underwater detection and response equipment to form a comprehensive and flexible underwater monitoring and response capability is an effective way to address these challenges in order to timely and accurately grasp the real-time situation in key sea areas.

[0003] Rapid-response marine equipment deployed on offshore platforms is a type of cross-medium mobile deployment product carried by high-speed aircraft (such as rockets, fixed-wing UAVs, and electromagnetic catapults). It features timely response and wide coverage, making it a crucial component of marine information monitoring and processing systems (especially for rapid underwater targets). High-speed cross-medium deployment marine equipment involves high airborne ballistic velocities and stages including water impact, underwater movement, and buoyancy, resulting in complex physical processes. Generally, during the development phase, numerical simulation and experimental methods are used to analyze the entire ballistic trajectory, providing a reference for determining key nodes and specific structural design. However, due to the complex and variable marine environment, the external factors faced by high-speed cross-medium deployment marine equipment during actual operation differ from the ideal input conditions in the design phase. This leads to significant deviations in the performance evaluation and design of key components, potentially causing structural failures (such as float assemblies) during full-trajectory testing of the prototype. The aforementioned failures will result in the direct loss of valuable experimental data, rendering the data worthless and causing economic and resource losses. Furthermore, it will render subsequent design changes unfounded and hinder the further improvement of high-speed cross-medium deployment marine equipment.

[0004] Therefore, in light of the above background, developing a compact ballistic measurement test device with redundant buoyancy capabilities to significantly improve the "survivability" of ballistic test data is of great significance for the development of cross-medium deployed marine equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a redundant underwater ballistic measurement experimental device.

[0006] A redundant underwater ballistic measurement experimental device according to the present invention includes a head, a buoyancy chamber shell, a test chamber shell, and a transition ring connected in sequence by fasteners.

[0007] The buoyancy chamber shell contains buoyancy material. A connecting bottom is provided inside the connection between the buoyancy chamber shell and the test chamber shell. A base plate is provided on the side of the connecting bottom near the buoyancy material. An ejection device is provided inside the connecting bottom. An airbag is connected to the transition ring. An inflation module is provided on the transition ring. The inflation module is connected to the airbag.

[0008] It also includes a control system, under the action of which during recovery:

[0009] The ejection device is activated to push the base plate toward the head, causing the head to detach from the buoyancy chamber shell, and the buoyancy material is ejected from the buoyancy chamber shell by the base plate.

[0010] And / or, the inflation module inflates the airbag, and the airbag expands and opens.

[0011] Preferably, a detachment plate and a bottom plate are provided at the connection between the head and the buoyancy chamber shell. A space for accommodating buoyancy material is formed between the bottom plate and the base plate. The detachment plate is connected to a push rod via a flange. The radially outer side of the flange is in free contact with the central opening of the bottom plate. The push rod extends from the flange along the shell axial direction to the base plate and contacts the base plate.

[0012] Preferably, the connecting base has a front cavity on its side near the substrate, the control system includes a control circuit module disposed in the front cavity of the connecting base, and the ejection device includes an igniter fixed to the circuit board of the control circuit module by a pressure cap.

[0013] Preferably, the control system further includes a central connector and a data acquisition circuit module, and a rear cavity is provided on the side of the connection base near the transition ring, and the data acquisition circuit module is installed in the rear cavity of the connection base;

[0014] A threaded hole is provided at the center between the front and rear cavities of the connecting base, and the central connector is installed in the threaded hole for the transmission of electrical and communication signals between the front and rear cavities.

[0015] Preferably, the maximum outer diameter of the substrate contacts the inner wall of the buoyancy chamber shell, and a sealing ring ensures the sealing of the contact.

[0016] The substrate has multiple mutually orthogonal channels at its center, each channel leading to the maximum outer diameter surface of the substrate. A cavity is provided at the end of each channel, and a spring and a pin are installed in the cavity. The spring is inserted into the opening of the substrate for fixation and guidance, and the side of the pin near the air passage has a protruding structure that is inserted into the cavity at the end of the channel to achieve a guiding function.

[0017] Preferably, the inner wall surface of the buoyancy chamber shell near the head is provided with a groove, and the groove is inserted into a pin.

[0018] Preferably, the transition ring has a front cavity on the side closer to the test chamber shell, and a rear cavity on the side farther away from the test chamber shell.

[0019] The inflation module is installed in the front cavity of the transition ring. The rear cavity of the transition ring contains a seawater switch, an inflation nozzle, and a sintering connector. The seawater switch is electrically connected to the sintering connector, the sintering connector is electrically connected to the control system, and the inflation nozzle's air passage is connected to the air passage of the inflation module.

[0020] Preferably, the inflation module includes an inflation chamber, a compression spring, a plug, an electric detonator, a puncture plug, a small-diameter sealing ring, a plug, a gas cylinder pressure ring, a sintered connector, and a gas cylinder;

[0021] Under the control system, the electric detonator ignites to generate high-temperature and high-pressure gas. The gas passes through the gas passage inside the inflation chamber and pushes the puncture plug toward the gas cylinder. After the sharp tip of the puncture plug punctures the gas cylinder opening, it moves back to its original position under the action of the compression spring until it returns to its original position. Because the gas cylinder opening is punctured, the high-pressure gas inside is ejected outward, filling the gas passage inside the inflation chamber, and inflating the gas bag through the inflation nozzle.

[0022] Preferably, the number of fasteners used to connect the head and the buoyancy chamber shell is less than the number of fasteners used to connect the buoyancy chamber shell and the connecting bottom.

[0023] Preferably, the control system includes a data acquisition module, a control circuit module, and a central connector, wherein the central connector electrically connects the data acquisition module and the control circuit module.

[0024] The data acquisition module is turned on by a mechanical switch when the system starts up and maintains data acquisition throughout the entire working phase until the preset acquisition time is reached or the power is exhausted. When the experimental device enters the water at the end of the trajectory, the data acquisition module receives a signal and determines that the recovery device has entered the underwater movement phase. At this time, the acquisition frequency of the sensor will be adjusted through a preset program to distinguish and match the different characteristics of the air trajectory and the underwater trajectory.

[0025] The control circuit module enters the working state from the dormant state, controls the ejection device to start and push the base plate to move towards the head so that the head is separated from the buoyancy chamber shell. The buoyancy material is ejected from the buoyancy chamber shell by the base plate. The inflation module inflates the airbag, and the airbag expands and opens.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This invention adopts a piston-type cavity structure filled with low-density foam material. By using gas to drive the shear separation ball head, the foam material is simultaneously pushed out, forming a combined buoyancy protection scheme of cavity and low-density material. It provides relatively large buoyancy performance with a small axial space, and forms a redundant recovery capability with the rear float.

[0028] 2. This invention adopts a gas channel diversion method, which separates and reuses the gas, and combines it with a traditional spring energy storage structure to complete the locking function of the cavity piston section and the low-density foam material section in a dual-power form, thereby improving the mechanism's execution speed and energy utilization rate. Attached Figure Description

[0029] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 This is a front view showing the overall assembly of the experimental apparatus, which is the main feature of this invention.

[0031] Figure 2 This is a cross-sectional view that mainly illustrates the overall assembly of the experimental apparatus in this invention;

[0032] Figure 3 This invention mainly embodies the assembly diagram of the buoyancy material fixing structure;

[0033] Figure 4 This invention mainly illustrates the assembly diagram of the ignition device;

[0034] Figure 5 The right view of the transition ring is the main feature of this invention;

[0035] Figure 6 This invention is mainly illustrated by a cross-sectional view of the substrate;

[0036] Figure 7 This invention mainly embodies the assembly diagram of the inflatable module;

[0037] Figure 8 This invention primarily illustrates the structural movement and position of the ignition device after it has been activated.

[0038] Figure 9 This is a partial view of the positioning and locking structure, which is the main feature of this invention.

[0039] As shown in the figure:

[0040] Head 1, Spring 19

[0041] Buoyancy chamber shell 2, pin 20

[0042] Test chamber shell 3 Inflatable chamber 21

[0043] Transition ring 4, compression spring 22

[0044] 5 sealing rings, 23 plugs

[0045] 6 detachment plates, 24 electric detonators

[0046] Base plate 7, puncture plug 25

[0047] Buoyancy material 8 Small diameter sealing ring 26

[0048] Support rod 9, plug 27

[0049] 10 baseboards, 28 gas cylinders crushed.

[0050] Ignition device 11, Sintering connector 29

[0051] Connect bottom 12 gas cylinder 30

[0052] Control circuit module 13, flange 31

[0053] Center connector 14, push rod 32

[0054] Data acquisition circuit module 15, cover 33

[0055] 16 air-filled modules and 34 pads

[0056] Seawater switch 17, short washer 35

[0057] 18 air nozzles, 36 airbags Detailed Implementation

[0058] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5As shown, a redundant underwater ballistic measurement experimental device according to the present invention includes a head 1, a buoyancy chamber shell 2, a test chamber shell 3, and a transition ring 4 connected in sequence by fasteners, forming the external structural outline of the device. Each section is fixed at the connection with countersunk screws, and the sealing ring 5 ensures the sealing of the connection. The buoyancy chamber shell 2 contains buoyancy material 8. A connecting bottom 12 is provided inside the connection between the buoyancy chamber shell 2 and the test chamber shell 3. A base plate 10 is provided on the side of the connecting bottom 12 near the buoyancy material 8. An ejection device is provided inside the connecting bottom 12. An airbag 36 is connected to the transition ring 4. An inflation module 16 is provided on the transition ring 4, and the inflation module 16 communicates with the airbag 36.

[0060] It also includes a control system. During recovery, under the action of the control system: the ejection device is activated to push the base plate 10 to move towards the head 1 so that the head 1 is separated from the buoyancy chamber shell 2, the buoyancy material 8 is ejected from the buoyancy chamber shell 2 by the base plate 10, and / or, the inflation module 16 inflates the airbag 36, and the airbag 36 expands and opens.

[0061] This application demonstrates good overload resistance and execution efficiency. The device structure is safe and reliable, with a small axial space occupation, and can be used in all-course ballistic testing scenarios for aircraft, including airborne, water-entry, and underwater missions, solving the technical problems of aircraft separation upon water entry and reliable recovery of measurement data segments. The recovery functional section adopts a piston-type cavity structure filled with low-density foam material. Gas propels a shear separation ball head to simultaneously eject the foam material, forming a combined buoyancy guarantee scheme of cavity and low-density material. This provides relatively large buoyancy performance with a small axial space, forming a redundant recovery capability with the rear float.

[0062] Specifically, a detachment plate 6 and a bottom plate 7 are provided at the connection between the head 1 and the buoyancy chamber shell 2. A space for buoyancy material 8 is formed between the bottom plate 7 and the base plate 10. The detachment plate 6 is connected to a push rod 32 through a flange 31. The radial outer side of the flange 31 is in free contact with the central opening of the bottom plate 7. The push rod 32 extends from the flange 31 along the shell axial direction to the base plate 10 and contacts the base plate 10.

[0063] More specifically: The buoyancy chamber shell 2 contains buoyancy material 8. A circular hole is formed in the center of the buoyancy material 8, through which a push rod 32 passes. The front end of the push rod 32 is threadedly connected to a flange 31. The front end of the flange 31 is inserted into the central hole of the detachment plate 6. The flange 31 and the detachment plate 6 are connected by radially distributed screws. The radially outer surface of the flange 31 is also in free contact with the central opening of the base plate 7. The rear end of the push rod 32 is in free contact with the front end face of the base plate 10. The buoyancy material 8 has radially equidistant through holes, each through which a support rod 9 passes. The front end of the support rod 9 has an internal thread, and its front end face is in contact with the base plate 7. It is fixed with screws through countersunk threaded holes on the base plate 7. The rear end of the support rod 9 is in contact with the end face of the base plate 10, and is connected with screws through the internal thread of the rear end of the support rod 9 and the radially countersunk through holes of the base plate 10. The maximum outer diameter of the base plate 10 is in contact with the inner wall of the buoyancy chamber shell 2, and the sealing ring 5 ensures a tight seal. The rear end of the substrate 10 is in free contact with the front end of the connecting base 12.

[0064] like Figure 6 To be more specific: Multiple mutually orthogonal channels are opened at the center of the substrate 10, each channel leading to the maximum outer diameter surface of the substrate 10. A cavity is provided at the tail of each channel, containing a spring 19 and a pin 20. The spring 19 is inserted into the opening of the substrate 10 for fixation and guidance. The pin 20, with a protruding structure on the side near the air passage, is inserted into the cavity at the tail of the channel for guidance. A groove is provided on the inner wall surface of the buoyancy chamber shell 2 near the head 1, and the groove is engaged with the pin 20.

[0065] Furthermore, a front cavity is provided on the side of the connecting base 12 near the substrate 10. The control system includes a control circuit module 13, which is disposed in the front cavity of the connecting base 12. The ejection device includes an igniter 11, which is fixed to the circuit board of the control circuit module 13 by a pressure cap 33. The control system also includes a center connector 14 and a data acquisition circuit module 15. A rear cavity is provided on the side of the connecting base 12 near the transition ring 4, and the data acquisition circuit module 15 is installed in the rear cavity of the connecting base 12. A threaded hole is opened at the center position between the front cavity and the rear cavity of the connecting base 12, and the center connector 14 is installed in the threaded hole for electrical and communication signal transmission between the front cavity and the rear cavity.

[0066] Furthermore, the front and rear sections of the connecting base 12 extend into the inner walls of the buoyancy chamber shell 2 and the test chamber shell 3, respectively, with sealing ensured by the sealing ring 5. A control circuit module 13 is installed in the front cavity of the connecting base 12. An ignition device 11 is mounted on the front circuit board of the control circuit module 13, and the ignition device 11 is fixed by a pressure cap 33. The pressure cap 33 is fixed to the front circuit board of the control circuit module 13 with screws and nuts through a through hole on its flange. The two circuits of the control circuit module 13 are isolated by a spacer 34. A threaded hole is opened at the center of the partition between the front and rear cavities of the connecting base 12, and a center connector 14 is installed in the threaded hole for the transmission of electrical and communication signals between the front and rear cavities. A data acquisition circuit module 15 is installed in the rear cavity of the connecting base 12, and the data acquisition circuit module 15 is isolated from the rear end face of the connecting base 12 by a short spacer 35. The rear end face of the connecting base 12 is connected to the transition ring 4, and the connection is fixed with countersunk screws, with the sealing ring 5 ensuring the sealing of the segment connection.

[0067] The transition ring 4 has a front cavity on the side closer to the test chamber shell 3 and a rear cavity on the side farther away from the test chamber shell 3. The inflation module 16 is installed in the front cavity of the transition ring 4. The rear cavity of the transition ring 4 contains a seawater switch 17, an inflation nozzle 18, and a sintering connector 29. The seawater switch 17 is electrically connected to the sintering connector 29, which is also electrically connected to the control system. The air passage of the inflation nozzle 18 is connected to the air passage of the inflation module 16. The inflation module 16 is installed in the front cavity of the transition ring 4 and is fixed to the end face of the transition ring 4 with screws through a through hole. The seawater switch 17, inflation nozzle 18, and sintering connector 29 are installed in the rear cavity of the transition ring 4. The seawater switch 17 and sintering connector 29 are directly fixed to the rear end face of the transition ring 4 with screws. The inflation nozzle 18 is fixed with screws through a through hole on the flange 31 and threads on the protruding plane of the transition ring 4. The air passage of the inflation nozzle 18 is connected to the air passage of the inflation module 16.

[0068] like Figure 7As shown, this application provides a preferred embodiment of an inflation module 16: the inflation module 16 includes an inflation chamber 21, a compression spring 22, a plug 23, an electric detonator 24, a piercing plug 25, a small-diameter sealing ring 26, a plug 27, a gas cylinder pressure ring 28, a sintered connector 29, and a gas cylinder 30. Under the action of the control system, the electric detonator 24 ignites to generate high-temperature and high-pressure gas. The gas passes through the air passage built into the inflation chamber 21 and pushes the piercing plug 25 toward the gas cylinder 30. After the sharp end of the piercing plug 25 pierces the opening of the gas cylinder 30, it moves back to its original position under the action of the compression spring 22 until it returns to its original position. Due to the piercing of the opening, the high-pressure gas inside the gas cylinder 30 is ejected outward, filling the built-in air passage of the inflation chamber 21, and inflating the gas bag 36 through the inflation nozzle 18. Specifically, the gas cylinder 30 is fixed to the end face of the transition ring 4 by the gas cylinder pressure ring 28 with screws, and the outlet end of the gas cylinder 30 is connected to the inflation chamber 21 by threads. The air chamber 21 has an internal air passage. Four threaded holes are located on the back side facing the transition ring 4, which are secured with screws by engaging with through holes on the transition ring 4. The plug 23 is directly inserted into the opening of the air chamber 21, its outer end fitting against the inner wall of the transition ring 4, its displacement restricted by the inner wall. Simultaneously, the mounting hole corresponding to the plug 23 in the air chamber 21 is an interference fit, ensuring that the plug 23 will not dislodge under stress during operation. The plug 27 is a cylindrical screw with a slotted end, screwed into the threaded opening of the air chamber 21 to block the end of the air passage. The sintered connector 29 is screwed into the threaded hole of the air chamber 21.

[0069] It should be emphasized that the number of fasteners used to connect the head 1 and the buoyancy chamber shell 2 is less than the number of fasteners used to connect the buoyancy chamber shell 2 and the bottom 12.

[0070] like Figure 8 and Figure 9 As shown, the control system includes a data acquisition module, a control circuit module 13, and a central connector 14. The central connector 14 electrically connects the data acquisition module and the control circuit module 13. The data acquisition module is activated by a mechanical switch when the system starts and maintains data acquisition throughout the entire working phase until the preset acquisition time is reached or the battery is depleted. When the experimental device enters the water at the end of the trajectory, the data acquisition module receives a signal and determines that the recovery device has entered the underwater movement phase. At this time, the sensor acquisition frequency is adjusted according to a preset program to distinguish and match the different characteristics of the air trajectory and the underwater trajectory. The control circuit module 13 enters the working state from the dormant state and controls the launch device to start pushing the base plate 10 towards the head 1, causing the head 1 to detach from the buoyancy chamber shell 2. The buoyancy material 8 is pushed out of the buoyancy chamber shell 2 by the base plate 10. The inflation module 16 inflates the airbag 36, and the airbag 36 expands and opens.

[0071] Specifically, the data acquisition module is activated via a mechanical switch upon system startup and maintains data acquisition throughout the entire operational phase until the preset acquisition duration is reached or the battery is depleted. When the recovery device, accompanying the aircraft, enters the water at the end of its trajectory, the seawater switch 17 is submerged and activated. The signal is then transmitted to the data acquisition module via the sintered connector 29. Upon receiving the signal, the data acquisition module determines that the recovery device has entered the underwater phase. At this point, it adjusts the sensor acquisition frequency according to a preset program to distinguish and match the different characteristics of the air and underwater trajectories. Simultaneously, the activation signal from the sintered connector 29 is further transmitted to the control circuit module 13 via the central connector 14, causing the control circuit module 13 to enter operational mode from sleep mode. The control circuit outputs ignition current to the electric detonator 24 via the central connector 14. The electric detonator 24 ignites, generating high-temperature, high-pressure gas. This gas rapidly propels the piercing plug 25 towards the gas cylinder 30 through the internal air passage of the inflation chamber 21. The sharp tip of the piercing plug 25 directly pierces the opening of the gas cylinder 30, and under the action of the compression spring 22, it moves back to its original position until it returns to its original position. Due to the piercing of the cylinder opening, the high-pressure gas inside the gas cylinder 30 is ejected outwards, quickly filling the internal air passage of the inflation chamber 21, and rapidly inflating the airbag 36 through the inflation nozzle 18. The airbag 36 expands continuously after inflation, providing buoyancy for the entire deceleration process. After outputting ignition current to the electric detonator 24, the control circuit immediately enters a delay mode based on its own chip clock. When the delay time arrives, the control circuit will output ignition current to the igniter 11, which will ignite and detonate, generating high-temperature and high-pressure gas. The gas acts on the cavity formed by the base plate 10 and the connecting bottom 12, exerting pressure on the end face of the base plate 10. The pressure is transmitted to the flange 31, the base plate 7, and the detachment plate 6 via the push rod 32. There are six connecting screws between the head 1 and the buoyancy chamber shell 2, and thirteen connecting screws between the buoyancy chamber shell 2 and the connecting bottom 12. Under the action of the gas pressure in the cavity, the connecting screws between the head 1 and the buoyancy chamber shell 2 are sheared and broken. After the axial constraint of the screws is removed, the base plate 10 pushes the push rod 32, the buoyancy material 8, the support rod 9, the flange 31, and the head 1 to the front end under the action of the gas pressure. During the movement, the pin 20 is in a contracted state due to the restriction of the inner wall of the buoyancy chamber shell 2, and some of the gas begins to gradually fill the gas passage space set on the base plate 10, thereby gradually forming a certain pressure on the bottom of the pin 20. When the base plate 10 moves to the front end of the buoyancy chamber shell 2, the positioning surface of the front end of the base plate 10 contacts the positioning surface of the front end of the buoyancy chamber shell 2, thus restricting the movement of the base plate 10. Simultaneously, because the inner wall of the centering portion (outwardly protruding part) at the front end of the buoyancy chamber shell 2 is provided with a groove, the pin 20 is no longer constrained by the inner wall of the buoyancy chamber shell 2. Under the action of the compression spring 22 and the gas pressure at the bottom of the pin 20, it moves outward until it contacts the groove wall of the buoyancy chamber shell 2. From this point on, under the combined constraint of the base plate 10 and the pin 20, the base plate 10 and the buoyancy chamber shell 2 are locked together.Because the base plate 10 is constrained by the support rod 9 and the base plate 7, it will be fixed to the buoyancy chamber shell 2 together with the base plate 10 after locking. The head 1 is unconstrained after separation. The detachment plate 6 connects the flange 31 and the push rod 32. The push rod 32 has no connection at the rear end. Therefore, after the base plate 10 is locked, the head 1, detachment plate 6, flange 31, and push rod 32 will be thrown out under inertia, achieving separation. After separation, the ejected buoyancy material 8 and the cavity formed by the original buoyancy material 8 within the buoyancy chamber shell 2 will form a common buoyancy, providing power for the recovery device to float and recover. The common buoyancy formed by the buoyancy material 8 and the cavity of the buoyancy chamber shell 2, along with the buoyancy of the airbag 36, can each independently ensure the floating of the recovery device. Therefore, even if the airbag 36 is damaged or the cavity of the buoyancy chamber shell 2 fails, the recovery of the recovery device can still be ensured, providing redundant recovery capability.

[0072] Those skilled in the art will understand that, besides implementing the system and its various devices, modules, and units provided by this invention in the form of purely computer-readable program code, the same functions can be achieved entirely through logical programming of the method steps, making the system and its various devices, modules, and units of this invention function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers. Therefore, the system and its various devices, modules, and units provided by this invention can be considered as a hardware component, and the devices, modules, and units included therein for implementing various functions can also be considered as structures within the hardware component; alternatively, the devices, modules, and units for implementing various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0073] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0074] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A redundant underwater ballistic measurement experimental device, characterized in that, This includes the head, buoyancy chamber shell, test chamber shell, and transition ring, which are connected in sequence by fasteners. The buoyancy chamber shell contains buoyancy material. A connecting bottom is provided inside the connection between the buoyancy chamber shell and the test chamber shell. A base plate is provided on the side of the connecting bottom near the buoyancy material. An ejection device is provided inside the connecting bottom. An airbag is connected to the transition ring. An inflation module is provided on the transition ring. The inflation module is connected to the airbag. It also includes a control system, under the action of which during recovery: The ejection device is activated to push the base plate toward the head, causing the head to detach from the buoyancy chamber shell, and the buoyancy material is ejected from the buoyancy chamber shell by the base plate. The inflation module inflates the airbag, and the airbag expands and opens. The maximum outer diameter of the substrate contacts the inner wall of the buoyancy chamber shell, and the sealing ring ensures the tightness of the contact. The substrate has multiple mutually orthogonal channels at its center. Each channel leads to the maximum outer diameter surface of the substrate. A cavity is provided at the end of each channel. A spring and a pin are installed in the cavity. The spring is inserted into the opening of the substrate for fixation and guidance. The side of the pin near the air passage has a protruding structure and is inserted into the cavity at the end of the channel to achieve a guiding function. The inner wall surface of the buoyancy chamber shell near the head is provided with a groove, which is inserted into a pin; The transition ring has a front cavity on the side closer to the test chamber shell, and a rear cavity on the side farther away from the test chamber shell. The inflation module is installed in the front cavity of the transition ring, and the rear cavity of the transition ring is equipped with a seawater switch, an inflation nozzle, and a sintering connector. The seawater switch is electrically connected to the sintering connector, the sintering connector is electrically connected to the control system, and the air passage of the inflation nozzle is connected to the air passage of the inflation module. The control system includes a data acquisition module, a control circuit module, and a central connector, wherein the central connector electrically connects the data acquisition module and the control circuit module. The data acquisition module is turned on by a mechanical switch when the system starts up and maintains data acquisition throughout the entire working phase until the preset acquisition time is reached or the power is exhausted. When the experimental device enters the water at the end of the trajectory, the data acquisition module receives a signal and determines that the recovery device has entered the underwater movement phase. At this time, the acquisition frequency of the sensor will be adjusted through a preset program to distinguish and match the different characteristics of the air trajectory and the underwater trajectory. The control circuit module enters the working state from the dormant state, controls the ejection device to start and push the base plate to move towards the head so that the head is separated from the buoyancy chamber shell. The buoyancy material is ejected from the buoyancy chamber shell by the base plate. The inflation module inflates the airbag, and the airbag expands and opens.

2. The redundant underwater ballistic measurement experimental device as described in claim 1, characterized in that, A detachment plate and a bottom plate are provided at the connection between the head and the buoyancy chamber shell. A space for buoyancy material is formed between the bottom plate and the base plate. The detachment plate is connected to a push rod through a flange. The radial outer side of the flange is in free contact with the center opening of the bottom plate. The push rod extends from the flange along the shell axis to the base plate and contacts the base plate.

3. The redundant underwater ballistic measurement experimental device as described in claim 1, characterized in that, The connecting base has a front cavity on its side near the substrate. The control system includes a control circuit module, which is located in the front cavity of the connecting base. The ejection device includes an igniter, which is fixed to the circuit board of the control circuit module by a pressure cap.

4. The redundant underwater ballistic measurement experimental device as described in claim 3, characterized in that, The control system also includes a central connector and a data acquisition circuit module. A rear cavity is provided on the side of the connection base near the transition ring, and the data acquisition circuit module is installed in the rear cavity of the connection base. A threaded hole is provided at the center between the front and rear cavities of the connecting base, and the central connector is installed in the threaded hole for the transmission of electrical and communication signals between the front and rear cavities.

5. The redundant underwater ballistic measurement experimental device as described in claim 1, characterized in that, The inflation module includes an inflation chamber, a compression spring, a plug, an electric detonator, a puncture plug, a small-diameter sealing ring, a plug, a gas cylinder pressure ring, a sintered connector, and a gas cylinder; Under the control system, the electric detonator ignites to generate high-temperature and high-pressure gas. The gas passes through the gas passage inside the inflation chamber and pushes the puncture plug toward the gas cylinder. After the sharp tip of the puncture plug punctures the gas cylinder opening, it moves back to its original position under the action of the compression spring until it returns to its original position. Because the gas cylinder opening is punctured, the high-pressure gas inside is ejected outward, filling the gas passage inside the inflation chamber, and inflating the gas bag through the inflation nozzle.

6. The redundant underwater ballistic measurement experimental device as described in claim 1, characterized in that, The number of fasteners used to connect the head and the buoyancy chamber shell is less than the number of fasteners used to connect the buoyancy chamber shell and the connecting bottom.

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