High-speed camera shooting system for underwater explosion of kilogram-level explosive and application method of high-speed camera shooting system

Abstract

The kilogram-level explosive underwater explosion high-speed camera shooting system comprises a mounting frame, a high-speed camera and a photoelectric converter which are connected with each other are mounted in the mounting frame in a matched manner, a cylinder is mounted on the outer ring of the mounting frame through an annular shock absorber, and a sealing cover is mounted at one end of the cylinder through a longitudinal shock absorber in a matched manner; the sealing cover is locked with the cylinder body through a fastener, and an observation window is mounted at the other end of the cylinder body through a fastener in a matched manner; a plurality of underwater illuminating lamps are uniformly arranged on the outer circumferential surface of the barrel body, each underwater illuminating lamp is connected with an underwater illuminating lamp cable, and the photoelectric composite cable is connected with a land computer; the underwater explosion high-speed camera system is integrally connected with the buoy through a mooring rope, the underwater explosion high-speed camera system is integrally arranged underwater, explosives are hung on one side of the underwater explosion high-speed camera system, and transient images in the bubble movement and structure damage process in the underwater explosion process can be effectively obtained. And a technical support can be provided for improving the testing capability of the underwater explosion test.

Description

Technical Field

[0001] The present invention relates to the technical field of experiments and tests, in particular to a high-speed camera system for underwater explosion of kilogram-level explosives and an application method thereof. Background Art

[0002] When an explosive undergoes an underwater explosion, shock waves will be generated. Subsequently, the bubbles formed by the detonation products will expand, contract, and migrate. When a target is present, the shock waves and bubble loads will cause serious damage to the target.

[0003] During underwater explosion experiments, for the study of bubble motion characteristics and target damage effects, electrical measurement means such as measuring pressure, strain, and acceleration are usually used, or the structural deformation of the target is mapped after the experiment. There is less observation of the transient process. In recent years, researchers have begun to use high-speed cameras to photograph the underwater explosion process. The main method is to build a water tank with an observation window on land, place the high-speed camera in an open area outside the water tank, conduct underwater explosion experiments in the water tank, and photograph the explosion process in the water tank through the observation window.

[0004] However, the space of the land-based water tank is limited, and the boundary effect is relatively obvious. At the same time, in order to ensure the structural safety of the water tank, the test charge is strictly limited to only a few tens of grams. In view of this, the underwater explosion experiment of kg-level explosives can only be carried out in a large pool. Since the high-speed camera does not have the ability to resist the impact of underwater explosion and cannot be placed in the pool, it is difficult to obtain images of the explosion process, which has become a bottleneck problem for the improvement of the test ability of underwater explosion experiments. Summary of the Invention

[0005] The applicant of the present invention aims at the above-mentioned disadvantages in the existing production technology and provides a high-speed camera system for underwater explosion of kilogram-level explosives and an application method thereof, so as to be used for photographing the images of the underwater explosion bubble motion and the target structure damage process when conducting underwater explosion of kg-level explosives in an explosion pool. The high-speed camera system for underwater explosion has functions such as high-speed camera impact protection, high-speed camera remote control, underwater lighting, adjustment of deployment depth and shooting angle, etc., and can effectively obtain transient images of bubble motion and structural damage processes during underwater explosion, providing technical support for the improvement of the test ability of underwater explosion experiments.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A high-speed camera system for underwater explosion of kilogram-level explosives, comprising a mounting rack, inside which a high-speed camera and a photoelectric converter connected to each other are fitted. The outer ring of the mounting rack is provided with a cylinder through circumferential shock absorbers. One end of the cylinder is provided with a sealing cover through longitudinal shock absorbers, and the sealing cover is locked with the cylinder through fasteners. The other end of the cylinder is provided with an observation window through fasteners. In the middle of the sealing cover, an optoelectronic composite cable connected to the photoelectric converter and an underwater lighting cable are passed through a watertight joint. A plurality of underwater lighting lamps are evenly arranged on the outer circumferential surface of the cylinder, and each underwater lighting lamp is connected to the underwater lighting cable. The optoelectronic composite cable is connected to a computer on land. The whole underwater explosion high-speed camera system is connected to a floating drum through a cable, and the whole underwater explosion high-speed camera system is placed underwater, and explosives are suspended beside the underwater explosion high-speed camera system.

[0008] Its further technical solution lies in that:

[0009] The mounting rack adopts an integral structure.

[0010] The mounting rack adopts a hollow cuboid structure.

[0011] A flange is arranged at the tail end of the mounting rack, and a retaining ring is arranged inside the mounting rack.

[0012] Guide rails are symmetrically arranged on the outer circumferential surface of the cylinder. A long strip-shaped notch is opened in the middle of the guide rail, and a lifting ring is fixedly installed on the long strip-shaped notch.

[0013] The cylinder has a hollow cylindrical structure, and a fillet is arranged outside the cylinder at the position where the observation window is installed.

[0014] The cross section of the guide rail has a "┎┒" structure.

[0015] Six underwater lighting lamps are provided.

[0016] Protective devices are arranged at the front and rear ends of the high-speed camera.

[0017] A high-speed camera system for underwater explosion of kilogram-level explosives and an application method thereof include the following operation processes:

[0018] S1. Assembly work of the system:

[0019] S1.1. Fix the high-speed camera and the photoelectric converter on the mounting rack. Circumferential shock absorbers are installed in four circumferential directions of the mounting rack, and a longitudinal shock absorber is installed at the tail of the mounting rack.

[0020] S1.2. Pass the optoelectronic composite cable from the outside to the inside through the watertight joint, and pass the underwater lighting cable from the inside to the outside through the watertight joint. The optoelectronic composite cable is connected to the photoelectric converter, and the photoelectric converter is connected to the high-speed camera.

[0021] S1.3. Place the entire mounting bracket into the cylinder body. Install an observation window at the front end of the cylinder body and a sealing cover at the rear end of the cylinder body.

[0022] S1.4. Install six underwater lighting lamps circumferentially at the front end outside the cylinder body, and connect the underwater lighting lamp cables to the underwater lighting lamps.

[0023] S2. Deployment work of the system:

[0024] S2.1. Connect one end of the cable to the lifting ring on the cylinder body, and the other end of the cable to the floating buoy.

[0025] S2.2. Hoist and place the entire underwater explosion high-speed imaging system at a predetermined underwater depth.

[0026] S2.3. Adjust the angle of the underwater explosion high-speed imaging system to align with the shooting area.

[0027] S3. High-speed imaging during the underwater explosion test:

[0028] S3.1. Connect the fiber optic composite cable and the computer, and remotely start the high-speed camera and the underwater lighting lamps.

[0029] S3.2. Remotely control the focus of the high-speed camera to ensure the normal operation of the entire system.

[0030] S3.3. Place kg-level explosives, wait for the detonation command to be issued, start high-speed imaging, and save the image files after the shooting is completed.

[0031] S4. Recovery work of the system:

[0032] S4.1. After the test, remotely turn off the high-speed camera and the underwater lighting lamps, and disconnect the connection between the fiber optic composite cable and the computer.

[0033] S4.2. Disconnect the cable from the floating buoy, and recover the entire underwater explosion high-speed imaging system to the shore.

[0034] S4.3. Remove the sealing cover, take out the high-speed camera from the cylinder body, check the status of the high-speed camera, and confirm it is normal.

[0035] The beneficial effects of the present invention are as follows:

[0036] The structure of the present invention is compact and reasonable, and it is convenient to operate. Through the cooperation of components such as the anti-shock protection device, high-speed camera, optoelectronic converter, optoelectronic composite cable, underwater lighting lamp, underwater lighting lamp cable, computer, etc., it can be used to capture images of the underwater explosion bubble movement and the target structure damage process during the underwater explosion of kg-level explosives in an explosion pool. The underwater explosion high-speed imaging system has functions such as high-speed camera anti-shock protection, high-speed camera remote control, underwater lighting, deployment depth and shooting angle adjustment, etc., and can effectively obtain transient images of bubble movement and structure damage during the underwater explosion process, providing technical support for the improvement of the underwater explosion test measurement ability.

[0037] When conducting the underwater explosion test of kg-level explosives in the pool, first, assemble the underwater explosion high-speed imaging system; then, deploy the underwater explosion high-speed imaging system underwater; after that, conduct high-speed imaging during the underwater explosion test process; finally, recover the underwater explosion high-speed imaging system to the shore.

[0038] The underwater explosion high-speed imaging system of the present invention has functions such as high-speed camera anti-shock protection, high-speed camera remote control, underwater lighting, deployment depth and shooting angle adjustment, etc., and can effectively obtain transient process images of the underwater explosion bubble movement and structure damage of kg-level explosives. Brief Description of the Drawings

[0039] Figure 1 It is a schematic cross-sectional view of the underwater explosion high-speed imaging system of the present invention.

[0040] Figure 2 is Figure 1 The full cross-sectional view along the A-A section in

[0041] Figure 3 It is the test deployment diagram of the underwater explosion high-speed imaging system of the present invention.

[0042] Figure 4 It is the high-speed imaging image of the underwater explosion bubble movement process of 1 kg of explosives of the present invention.

[0043] Figure 5 It is the displacement time history curve diagram of the bubble boundary and center of the underwater explosion of 1 kg of explosives of the present invention.

[0044] Wherein: 1. High-speed camera; 2. Optoelectronic converter; 3. Mounting frame; 4. Circumferential shock absorber; 5. Longitudinal shock absorber; 6. Optoelectronic composite cable; 7. Watertight joint; 8. Underwater lighting lamp cable; 9. Cylinder body; 10. Observation window; 11. Sealing cover; 12. Underwater lighting lamp; 13. Cable; 14. Sling ring; 15. Floating cylinder; 16. Computer; 17. Guide rail; 18. Notch; 19. Explosive. Detailed Embodiment

[0045] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0046] As Figures 1-5 shown, the kilogram-level explosive underwater explosion high-speed camera system of this embodiment includes a mounting frame 3. Inside the mounting frame 3, a high-speed camera 1 and a photoelectric converter 2 that are connected to each other are fitted and installed. The outer ring of the mounting frame 3 is installed with a cylinder body 9 through a circumferential shock absorber 4. One end of the cylinder body 9 is fitted and installed with a sealing cover 11 through a longitudinal shock absorber 5. The sealing cover 11 is locked with the cylinder body 9 through a fastener. The other end of the cylinder body 9 is fitted and installed with an observation window 10 through a fastener; in the middle of the sealing cover 11, a photoelectric composite cable 6 connected to the photoelectric converter 2 and an underwater lighting cable 8 are passed through a watertight joint 7. A plurality of underwater lighting lamps 12 are evenly arranged on the outer circumferential surface of the cylinder body 9. Each underwater lighting lamp 12 is connected to the underwater lighting cable 8, and the photoelectric composite cable 6 is connected to a computer 16 on land; the underwater explosion high-speed camera system as a whole is connected to a floating cylinder 15 through a cable 13. The underwater explosion high-speed camera system as a whole is placed underwater, and an explosive 19 is suspended beside the underwater explosion high-speed camera system.

[0047] The mounting frame 3 adopts an integral structure, which is convenient to manufacture and has a low cost.

[0048] The mounting frame 3 adopts a hollow cuboid structure.

[0049] Flanges are provided at both ends of the mounting frame 3, and a retaining ring is provided inside the mounting frame 3.

[0050] Guide rails 17 are symmetrically arranged on the outer circumferential surface of the cylinder body 9. A long strip-shaped notch 18 is opened in the middle of the guide rail 17, and a lifting ring 14 is fixedly installed on the long strip-shaped notch 18.

[0051] The cylinder body 9 has a hollow cylinder structure, and a fillet is provided on the outside of the cylinder body 9 where the observation window 10 is installed.

[0052] The cross-section of the guide rail 17 has a "┎┒" structure.

[0053] Six underwater lighting lamps 12 are provided.

[0054] Protective devices are provided at the front and rear ends of the high-speed camera 1.

[0055] The specific structure and functions of the kilogram-level explosive underwater explosion high-speed camera system of the present invention are as follows:

[0056] It mainly includes: an impact-resistant protection device, a high-speed camera 1, a photoelectric converter 2, a photoelectric composite cable 6, a plurality of underwater lighting lamps 12, an underwater lighting cable 8, a computer 16, etc.

[0057] Among them, the anti-impact protection device mainly consists of a cylinder body 9, an observation window 10, a sealing cover 11, a watertight joint 7, a circumferential shock absorber 4, a mounting bracket 3, and a lifting ring 14.

[0058] When conducting underwater explosion tests of kilogram-level explosives in a pool, first assemble the underwater explosion high-speed imaging system: Fix the high-speed camera 1 and the optoelectronic converter 2 inside the mounting bracket 3, and install shock absorbers in the circumferential four directions and the tail of the mounting bracket 3; then pass the optoelectronic composite cable 6 from outside to inside through the watertight joint 7, and pass the underwater lighting cable 8 from inside to outside through the watertight joint 7. Connect the optoelectronic composite cable 6 to the optoelectronic converter 2, and connect the optoelectronic converter 2 to the high-speed camera 1; then place the entire mounting bracket 3 inside the cylinder body 9, install the observation window 10 at the front end of the cylinder body 9, and install the sealing cover 11 at the rear end of the cylinder body 9; finally, install six underwater lighting lamps 12 circumferentially at the front end outside the cylinder body 9, and connect the underwater lighting cable 8 to the underwater lighting lamp 12.

[0059] After the assembly is completed, place the underwater explosion high-speed imaging system underwater. One end of the cable 13 is connected to the lifting ring 14 on the anti-impact protection device, and the other end of the cable 13 is connected to the floating buoy 15; then, hoist the entire underwater explosion high-speed imaging system to a predetermined depth underwater; then, adjust the angle of the underwater explosion high-speed imaging system to align with the shooting area.

[0060] After the underwater explosion high-speed imaging system is placed, conduct high-speed imaging during the underwater explosion test. Connect the optoelectronic composite cable 6 and the computer 16, remotely start the high-speed camera 1 and the underwater lighting lamp 12, remotely control the focusing of the high-speed camera 1 to ensure that the entire system is normal; wait for the detonation command to be issued, start high-speed imaging, and save the image files.

[0061] After the underwater explosion test is over, recover the underwater explosion high-speed imaging system: Remotely turn off the high-speed camera 1 and the underwater lighting lamp 12, and disconnect the connection between the optoelectronic composite cable 6 and the computer 16; disconnect the connection between the cable 13 and the floating buoy 15, and recover the entire underwater explosion high-speed imaging system to the shore; disassemble the sealing cover 11, take out the high-speed camera 1 from the cylinder body 9, check the status of the high-speed camera 1, and confirm that it is normal.

[0062] The underwater explosion high-speed imaging system has functions such as anti-impact protection of the high-speed camera 1, remote control of the high-speed camera 1, underwater lighting, adjustment of the deployment depth and shooting angle, etc., and can effectively obtain images of the transient process of underwater explosion bubble movement and structural damage of kg-level explosives.

[0063] The present invention has functions such as anti-impact protection of the high-speed camera 1, remote control of the high-speed camera 1, underwater lighting, adjustment of the deployment depth and shooting angle, etc., and can take images of the transient process of underwater explosion bubble movement and structural damage of kg-level explosives in an explosion pool, providing technical support for the improvement of the test capabilities of underwater explosion tests.

[0064] During the actual working process, the specific work process is as follows in terms of operation steps:

[0065] Step 1: Assemble the underwater explosion high-speed camera system.

[0066] Fix the high-speed camera 1 and the optoelectronic converter 2 on the mounting frame 3. Mount circumferential shock absorbers 4 in four circumferential directions on the mounting frame 3, and mount a longitudinal shock absorber 5 at the tail of the mounting frame 3;

[0067] Pass the optoelectronic composite cable 6 from the outside to the inside through the watertight joint 7, and pass the underwater lighting cable 8 from the inside to the outside through the watertight joint 7. Connect the optoelectronic composite cable 6 to the optoelectronic converter 2, and connect the optoelectronic converter 2 to the high-speed camera 1;

[0068] Put the entire mounting frame 3 into the cylinder 9. Install an observation window 10 at the front end of the cylinder 9, and install a sealing cover 11 at the rear end of the cylinder 9;

[0069] Circumferentially install six underwater lighting lamps 12 at the front end outside the cylinder 9, and connect the underwater lighting cable 8 to the underwater lighting lamps 12.

[0070] Step 2: Deploy the underwater explosion high-speed camera system.

[0071] Connect one end of the cable 13 to the lifting ring 14 on the cylinder 9, and connect the other end of the cable 13 to the floating buoy 15;

[0072] Lift and place the entire underwater explosion high-speed camera system at a predetermined underwater depth;

[0073] Adjust the angle of the underwater explosion high-speed camera system to align it with the shooting area.

[0074] Step 3: High-speed camera shooting during the underwater explosion test process.

[0075] Connect the optoelectronic composite cable 6 and the computer 16, remotely start the high-speed camera 1 and the underwater lighting lamps 12, remotely control the focusing of the high-speed camera 1, and confirm that the entire system is normal;

[0076] Deploy kg-level explosives 19, wait for the detonation command to be issued, start high-speed camera shooting, and save the image files after shooting ends.

[0077] Step 4: Recover the underwater explosion high-speed camera system.

[0078] After the test, remotely turn off the high-speed camera 1 and the underwater lighting lamps 12, and disconnect the connection between the optoelectronic composite cable 6 and the computer 16;

[0079] Disconnect the cable 13 from the floating buoy 15, and recover the entire underwater explosion high-speed camera system to the shore;

[0080] Remove the sealing cover 11, take out the high-speed camera 1 from the cylinder body 9, check the status of the high-speed camera 1, and confirm that it is normal.

[0081] As Figure 4 shown, it is a high-speed camera image of the movement process of the underwater explosion bubble of 1 kg of explosive 19 obtained by shooting. The shooting speed is 1000 frames per second, and the duration is two pulsation periods. The bubble contour can be clearly distinguished. After data processing, the Figure 5 displacement time history curves of the boundary and center of the underwater explosion bubble of 1 kg of explosive 19 are obtained. After inspection, the high-speed camera 1 is in good condition after the test. The results show that the underwater explosion high-speed camera system can effectively obtain the images of the transient process of the underwater explosion bubble of kg-level explosive 19.

[0082] The above description is an explanation of the present invention, not a limitation of the invention. For the scope defined by the present invention, refer to the claims. Within the protection scope of the present invention, any form of modification can be made.

Claims

1. A high-speed camera system for underwater explosion of kilogram-level explosives, characterized in that: The invention comprises a mounting frame (3), wherein a high-speed camera (1) and a photoelectric converter (2) connected to each other are mounted in cooperation with each other inside the mounting frame (3), a cylinder (9) is mounted on the outer ring of the mounting frame (3) through an annular shock absorber (4), a sealing cover (11) is mounted on one end of the cylinder (9) through a longitudinal shock absorber (5), the sealing cover (11) is locked with the cylinder (9) through a fastener, and an observation window (10) is mounted on the other end of the cylinder (9) through a fastener; a watertight joint ( 7) A photoelectric composite cable (6) and an underwater lighting cable (8) connected to the photoelectric converter (2) are passed through, and a plurality of underwater lightings (12) are evenly arranged on the outer circumference of the cylinder (9), each underwater lighting (12) is connected to the underwater lighting cable (8), and the photoelectric composite cable (6) is connected to a land computer (16); the underwater explosion high-speed camera system is connected to a buoy (15) through a cable (13), and the underwater explosion high-speed camera system is arranged underwater, and explosives (19) are suspended beside the underwater explosion high-speed camera system.

2. A high-speed camera system for underwater explosion of kilogram-level explosives as claimed in claim 1, characterized in that: The mounting frame (3) adopts an integrated structure.

3. A high-speed camera system for underwater explosion of kilogram-level explosives as claimed in claim 1, characterized in that: The mounting frame (3) adopts a hollow rectangular parallelepiped structure.

4. A high-speed camera system for underwater explosion of kilogram-level explosives as claimed in claim 1, characterized in that: A flange is provided at the rear end of the mounting frame (3), and a retaining ring is provided inside the mounting frame (3).

5. A high-speed camera system for underwater explosion of kilogram-level explosives as claimed in claim 1, characterized in that: A guide rail (17) is symmetrically arranged on the outer circumference of the cylinder (9), a long strip notch (18) is opened in the middle of the guide rail (17), and a lifting ring (14) is fixedly installed on the long strip notch (18).

6. A high-speed camera system for underwater explosion of kilogram-level explosives as claimed in claim 5, characterized in that: The cylinder (9) is in the form of a hollow cylindrical structure, and a rounded corner is arranged on the outside of the cylinder (9) where the observation window (10) is installed.

7. A high-speed camera system for underwater explosion of kilogram-level explosives as claimed in claim 5, characterized in that: The cross section of the guide rail (17) is a "┎┒" structure.

8. A high-speed camera system for underwater explosion of kilogram-level explosives as claimed in claim 1, characterized in that: Six underwater lighting lamps (12) are provided.

9. A high-speed camera system for underwater explosion of kilogram-level explosives as claimed in claim 1, characterized in that: Protective devices are provided at the front and rear ends of the high-speed camera (1).

10. A high-speed camera system for underwater explosion of kilogram-level explosives and an application method as claimed in claim 1, characterized in that: The following operation procedures are included: S1. System assembly work: S1.

1. Fix the high-speed camera (1) and the photoelectric converter (2) on the mounting frame (3). The mounting frame (3) is provided with circumferential shock absorbers (4) in four directions. The mounting frame (3) is provided with a longitudinal shock absorber (5) at the rear end. S1.2, pass the photoelectric composite cable (6) through the watertight joint (7) from the outside to the inside, pass the underwater lighting cable (8) through the watertight joint (7) from the inside to the outside, connect the photoelectric composite cable (6) to the photoelectric converter (2), and connect the photoelectric converter (2) to the high-speed camera (1); S1.

3. Place the mounting frame (3) as a whole into the cylinder (9), install an observation window (10) at the front end of the cylinder (9), and install a sealing cover (11) at the rear end of the cylinder (9); S1.

4. Six underwater lighting lamps (12) are installed in a circumferential manner at the front end of the outer side of the cylinder (9), and the underwater lighting lamp cables (8) are connected to the underwater lighting lamps (12); S2. System deployment: S2.

1. Connect one end of the cable (13) to the lifting ring (14) on the cylinder (9), and the other end of the cable (13) to the buoy (15); S2.

2. Suspend the underwater explosion high-speed camera system as a whole at a predetermined depth underwater; S2.

3. Adjust the angle of the underwater explosion high-speed camera system to aim at the shooting area; S3. High-speed video recording of underwater explosion test process: S3.1, connecting the optical-electric composite cable (6) and the computer (16), and remotely starting the high-speed camera (1) and the underwater lighting (12); S3.2, remotely control the high-speed camera (1) to focus and confirm that the entire system is normal; S3.3, place kg-level explosives (19), wait for the detonation command to be issued, start high-speed video recording, and save the image file after the shooting is completed; S4. System recovery work: S4.

1. After the test is completed, the high-speed camera (1) and the underwater lighting (12) are remotely turned off, and the connection between the optical-electric composite cable (6) and the computer (16) is disconnected; S4.2, disconnecting the cable (13) from the buoy (15), and recovering the underwater explosion high-speed camera system as a whole to the shore; S4.

3. Remove the sealing cover (11), take out the high-speed camera (1) from the cylinder (9), check the status of the high-speed camera (1), and confirm that it is normal.

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