Device for shooting initial form of explosion-formed penetration body

Abstract

The invention discloses a device for shooting the initial form of an explosion-formed penetration body. The shooting device comprises a high-shooting laying room and an anti-reflection background which are spaced and opposite to each other, the support is arranged in the light filtering protection device and used for fixedly installing a warhead generating explosion to form a penetration body. The light filtering protection device is arranged on one side of the high-speed camera laying room and the anti-reflection background, is provided with a penetration body channel, and is used for shielding explosion fire light and detonation products generated by the explosion of the warhead and preventing the explosion fire light from causing an overexposure phenomenon of the high-speed camera so as to shoot an image of an explosion-formed penetration body generated by the explosion of the warhead; the axis of the penetration body channel and the lens axis of the high-speed camera are coplanar and perpendicular. According to the shooting device, explosion fire light is weakened through the light filtering protection device, the concentration of detonation products flying along with the penetration body is reduced, and meanwhile sufficient light intensity is provided for the flying body, so that the initial form of the explosion-formed penetration body is captured.

Description

Technical Field

[0001] The invention belongs to the technical field of dynamic testing of explosively formed penetrators, and in particular relates to a device for photographing the initial form of an explosively formed penetrator. Background Art

[0002] Explosively formed penetrators refer to the destructive elements such as shaped jets, rod jets or explosively formed projectiles formed by the collapse of the metal charge liner driven by the explosion. The penetrator morphology parameters can provide an important basis for charge structure optimization, damage efficiency evaluation and fracture mechanism research. It is of great significance to obtain the initial morphology of explosively formed penetrators using dynamic testing technology, but the flight speed of explosively formed penetrators is relatively high (the speed range is about 2000-8000m / s), and the initial formation is accompanied by explosion flames and continuous burning detonation products, which makes it difficult to take clear images of the penetrator formation.

[0003] Ordinary high-speed cameras can obtain multiple photos at a time and are relatively cheap, but they are usually limited by the shooting environment and the matching of the light intensity of the object being photographed with the photosensitive device of the high-speed camera. In order to eliminate the afterimage of the high-speed flying penetrator, the high-speed camera needs to set a higher shutter speed, which greatly shortens the exposure time. Therefore, the object being photographed itself is required to have a certain light intensity. When the high-speed camera is shooting at a position close to the detonation point, the explosion light will instantly annihilate the penetrator, making it difficult to capture the image of the penetrator; if combined with a pulsed laser light source, the influence of the explosion light can be eliminated. However, there are a large number of particulates in the detonation products in the early stage of the explosively formed penetrator, which will affect the reflection and reception of the laser signal. Therefore, laser high-speed photography cannot capture the initial image of the explosively formed penetrator.

[0004] Traditional high-speed photography protection systems mostly use protective ladles with windows, and their optical observation windows are usually equipped with multi-layer composite bulletproof glass. Affected by the thickness and layered structure of the material, light waves will produce significant optical path differences when penetrating multi-layer media, causing multiple reflection effects, and ultimately forming a double image superposition phenomenon in the high-speed camera imaging system. This optical distortion manifests as characteristic image blur and ghosting during high-speed photography, and in high-energy and strong light scenes such as detonation experiments, the optical path distortion effect will be further amplified due to the exponential growth of the incident light intensity, greatly reducing the shooting quality. Therefore, there is an urgent need to improve the protective ladle, which can not only eliminate the interference of glass mirror reflection, but also protect the high-speed camera.

[0005] At present, pulse X-ray photography technology is widely used at home and abroad to photograph the initial morphology of explosively formed penetrators. The principle is to use short pulse X-rays to perform perspective imaging of high-speed moving objects. The test usually uses two pulse X-ray machines with different light emission times, which are placed in the light outlets at an angle of 45°, so that two images can be taken at a time. Compared with high-speed photography technology, pulse X-ray photography technology has a limited number of frames per shot. Summary of the invention

[0006] The present invention provides a device for photographing the initial morphology of an explosively formed penetrator. The photographing device weakens the explosion light and reduces the concentration of detonation products accompanying the flying penetrator through a light filtering and protection device, while providing sufficient light intensity for the flying object, so as to realize the capture of the initial morphology of the explosively formed penetrator by using a high-speed camera.

[0007] In order to achieve the above object, the present invention adopts the following specific technical solutions:

[0008] A device for photographing the initial state of an explosively formed penetrator, the photographing device comprising a high-speed camera placement room, a light filtering protection device, an anti-reflection background and a bracket;

[0009] The high-speed camera placement room is spaced apart from and arranged opposite to the anti-reflection background; a high-speed camera is arranged in the high-speed camera placement room, the high-speed camera faces the anti-reflection background and the axis of the lens is arranged in the horizontal direction; the bracket is arranged in the filter protection device, and is used to fix and install the warhead that produces the explosively formed penetrator;

[0010] The light filtering protection device is arranged on one side between the high-speed camera placement room and the anti-reflection background, and is provided with a penetrator channel, which is used to shield the explosion light and detonation products generated by the explosion of the warhead, so as to prevent the explosion light from overexposure of the high-speed camera, so as to capture the image of the explosively formed penetrator generated by the explosion of the warhead;

[0011] The penetrator channel extends in the horizontal direction, and the axis of the penetrator channel is coplanar and perpendicular to the lens axis of the high-speed camera; the penetrator channel is used to allow the explosively formed penetrator to pass through the rear fragments and fly between the high-speed camera placement room and the anti-reflection background.

[0012] Furthermore, the light filtering protection device comprises a light filtering protection cover, a flange, at least two light filtering tubes, a light shielding cover and an adjustable light filter;

[0013] The bracket is located in the filter protection cover; the flange, at least two filter tubes and the light shielding cover are coaxially connected in sequence; the adjustable filter is pressed against the last filter tube through the light shielding cover;

[0014] The filter protection cover is provided with a first circular through hole on one side facing the middle of the high-speed camera placement room and the anti-reflection background; the flange is fixedly mounted on the filter protection cover through the first circular through hole; the flange is provided with a second circular through hole; each filter tube is a round tube provided with a circular filter hole, and the inner diameter and outer diameter of the filter tube decrease in sequence along the direction from the flange toward the light shielding cover; the adjustable filter is in a circular ring shape and is provided with a third circular through hole; the light shielding cover is provided with a fourth circular through hole;

[0015] The second circular through hole, the circular filter hole, the third circular through hole and the fourth circular through hole are connected to form the penetrator channel.

[0016] Furthermore, the light filtering protective cover is formed by welding a front protective plate, a top protective plate and two side protective plates;

[0017] The front protection plate is arranged in a vertical direction and is parallel to the axis of the lens; the first circular through hole is arranged at the center of the front protection plate and is fixedly connected to the flange;

[0018] The two side protection plates are arranged obliquely along the vertical direction and are symmetrically distributed on both sides of the front protection plate;

[0019] The top protective plate is arranged in the horizontal direction and overlapped with the top of the side protective plate and the front protective plate;

[0020] The front protective plate, the top protective plate and the side protective plates are all made of steel;

[0021] The bracket is arranged in a space surrounded by the front protective plate, the top protective plate and the side protective plates.

[0022] Furthermore, threaded connections are adopted between the flange and the front protection plate, between the flange and the filter tube, between the filter tubes, and between the light shielding cover and the filter tube.

[0023] Furthermore, the light filtering protection device includes two light filtering cylinders, namely a first light filtering cylinder and a second light filtering cylinder;

[0024] One end of the first filter cylinder is provided with an external thread, and the other end is provided with an internal thread;

[0025] Both ends of the second filter cylinder are provided with external threads;

[0026] One end of the first filter cylinder is threadedly connected to the internal thread hole of the flange through an external thread, and the other end is threadedly connected to the external thread of the second filter cylinder through an internal thread;

[0027] The other end of the second filter cylinder is threadedly connected to the light shielding cover through an external thread.

[0028] Furthermore, the aperture of the first circular through hole is 1-1.25 times the charge diameter;

[0029] The diameter of the third circular through hole is 0.4-0.7 times the diameter of the charge;

[0030] The aperture of the fourth circular through hole is larger than the aperture of the third circular through hole and smaller than the aperture of the circular filter hole.

[0031] Furthermore, the horizontal distance between the front protection plate and the bracket is 8-10 times the charge caliber;

[0032] The horizontal distance between the lens axis of the high-speed camera and the bracket is 35-40 times the charging aperture.

[0033] Furthermore, the adjustable filter is made of cardboard.

[0034] Furthermore, the high-resolution placement room includes a protective steel ladle and a protective steel plate;

[0035] The protective ladle is provided with an optical observation window on the side facing the anti-reflection background, and the protective steel plate is installed on the side facing the light filtering protection device through an adjustable angle limit mechanism and an articulated door shaft mechanism;

[0036] The optical observation window adopts single-layer bulletproof glass.

[0037] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0038] The photographing device of the present invention limits the irradiation angle and range of the explosion fire light through the filter protection device, avoids the overexposure phenomenon of the lens of the high-speed camera being covered in the light curtain area of ​​the explosion fire light, and provides sufficient light intensity for the explosively formed penetrator to facilitate shooting. The present invention uses a filter protection device to optimize the traditional high-speed photography technology, the price is relatively low, and multiple photos can be obtained at a time. At the same time, the requirements for natural light conditions are low, and clear high-speed explosively formed penetrator images can be captured, providing an efficient and low-cost testing means for obtaining images of the initial form and flight posture of the explosively formed penetrator.

[0039] The scattering angle of the explosion fire is determined by the inner diameter of the adjustable filter and the distance between the filter and the detonation point. The flange plays the role of lengthening the distance from the filter to the detonation point and connecting the filter protection cover and the filter tube. The segmented filter tube can effectively reduce the concentration of the overflow of the detonation products by reducing the aperture in a step-by-step manner, and accelerate the separation of the explosively formed penetrator (EFP) and the detonation products. The light shielding cover is used to fix the adjustable filter, and the adjustable filter with a suitable aperture can be replaced according to the test conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A layout diagram of a device for photographing the initial state of an explosively formed penetrator according to the present invention;

[0041] Figure 2 is a side view of the light filtering protection device;

[0042] Figure 3 Isometric view of the light filtering protection device;

[0043] Figure 4a-4e It is a schematic diagram of the structure of the components of the light filtering protection device;

[0044] Figure 5 It is a working schematic diagram of the light filtering protection device;

[0045] Figure 6 It is a schematic diagram of the warhead explosion when no light filtering protection device is used;

[0046] Figure 7 Schematic diagram of the warhead explosion when a light filtering protection device is used.

[0047] Figure markings: 1-high-speed camera placement room, 2-light filtering protection device, 3-anti-reflective background, 4-bracket, 5-detonation point, 6-detonation products, 7-explosion-formed penetrator, 8-shooting field of view, 1-1-protective steel plate, 2-1-light filtering protection cover, 2-2-flange, 2-3-first light filter tube, 2-4-second light filter tube, 2-5-light shielding cover, 2-6-adjustable filter, 2-2-1-second circular through hole, 2-3-1-first circular light filtering hole, 2-4-1-second circular light filtering hole, 2-5-1-fourth circular through hole, 2-6-1-third circular through hole. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0049] The photographing device of the present invention weakens the explosion light and reduces the concentration of the detonation products 6 accompanying the explosively formed penetrator 7 through the light filtering and protecting device 2, so that the initial form of the explosively formed penetrator 7 can be photographed at a close distance.

[0050] like Figure 1 As shown in the structure, this embodiment provides a device for photographing the initial form of an explosively formed penetrator, the photographing device includes a high-speed camera placement room 1, a filter protection device 2, an anti-reflection background 3 and a bracket 4, wherein:

[0051] The high-resolution camera placement room 1 is arranged opposite to the anti-reflection background 3, and there is a gap between them; Figure 1 As shown, the high-speed camera placement room 1 is located on the left, the anti-reflection background 3 is located on the right, and the filter protection device 2 is located beside the high-speed camera placement room 1 and the anti-reflection background 3; a high-speed camera is arranged in the high-speed camera placement room 1, the high-speed camera faces the anti-reflection background 3 and the axis of the lens is arranged in the horizontal direction, the axis of the lens is perpendicular to the anti-reflection background 3 and the plumb plane at the same time; the bracket 4 is arranged in the filter protection device 2, and is used to fix and install the warhead that produces the explosively formed penetrator 7. The horizontal distance between the axis of the lens of the high-speed camera and the bracket 4 is 35-40 times the charge caliber.

[0052] The filter protection device 2 is arranged on one side between the high-resolution camera placement room 1 and the anti-reflection background 3, and is provided with a penetrating body channel; Figure 7 As shown, the filter protection device 2 is used to block the explosion light and detonation products 6 generated by the warhead explosion, so as to prevent the explosion light from overexposing the high-speed camera, so as to capture the image of the explosively formed penetrator 7 generated by the warhead explosion through the high-speed camera. The penetrator channel extends in the horizontal direction, and the axis of the penetrator channel is coplanar and perpendicular to the lens axis of the high-speed camera; the penetrator channel is used to allow the explosively formed penetrator 7 to pass through the fragments between the high-speed camera placement room 1 and the anti-reflection background 3.

[0053] like Figure 2 and Figure 3 As shown, the filter protection device 2 includes a filter protection cover 2-1, a flange 2-2, at least two filter cylinders, a light shielding cover 2-5 and an adjustable filter 2-6; the filter cylinders can be provided with two, three or more; in this embodiment, two filter cylinders are provided as an example for description, and the two filter cylinders are respectively a first filter cylinder 2-3 and a second filter cylinder 2-4. Figure 2As shown, the left end of the first filter cylinder 2-3 is fixedly installed on the flange 2-2 by threads, and the right end is connected to the left end of the second filter cylinder 2-4 by threads, and the right end of the second filter cylinder 2-4 is connected to the light shielding cover 2-5 by threads; when three or more filter cylinders are provided, the multiple filter cylinders are connected in sequence from left to right, the filter cylinder at the leftmost end is fixedly connected to the flange 2-2, and the filter cylinder at the rightmost end is fixedly connected to the light shielding cover 2-5. Along the direction from the flange 2-2 to the light shielding cover 2-5, the size of the filter cylinder decreases in sequence, that is, in two adjacent filter cylinders, the inner diameter of the filter cylinder on the left is equal to the outer diameter of the filter cylinder on the right, and the concentration of the explosion product 6 overflowing can be effectively weakened by reducing the radial size of the filter cylinder in a step-by-step manner. The radial size of the filter cylinder is determined by the radial size of the front connector, and multiple filter cylinders can be assembled according to the warhead charge caliber and the fragment size, and the filter cylinders can be connected by threads.

[0054] like Figure 1 As shown, the bracket 4 is located in the filter protective cover 2-1; Figure 2 As shown, the flange 2-2, at least two filter tubes and the light-shielding cover 2-5 are coaxially connected in sequence; the adjustable filter 2-6 is pressed against the last filter tube by the light-shielding cover 2-5, so that the adjustable filter 2-6 is located between the light-shielding cover 2-5 and the filter tube at the rightmost end; the material of the adjustable filter 2-6 is cardboard; the flange 2-2 and the filter protection cover 2-1 are fixedly connected, and can be connected by fasteners or threads. Threaded connections can be used between the flange 2-2 and the front protective plate, between the flange 2-2 and the filter tube, between the filter tubes, and between the light-shielding cover 2-5 and the filter tube. The threaded connection is convenient for disassembly and assembly, and it is convenient to adjust the number and size of the filter tubes according to actual conditions. It is also convenient to replace the adjustable filter 2-6. As shown Figure 2 As shown, the filter protection device 2 includes two filter cylinders, namely a first filter cylinder 2-3 and a second filter cylinder 2-4. The first filter cylinder 2-3 has a first circular filter hole 2-3-1, and the second filter cylinder 2-4 has a second circular filter hole 2-4-1. Figure 4b As shown, one end of the first filter tube 2-3 is provided with an external thread, and the other end is provided with an internal thread; Figure 4c As shown, both ends of the second filter tube 2-4 are provided with external threads; one end of the first filter tube 2-3 is threadedly connected to the internal thread hole of the flange 2-2 through an external thread, and the other end is threadedly connected to the external thread of the second filter tube 2-4 through an internal thread; the other end of the second filter tube 2-4 is threadedly connected to the light shielding cover 2-5 through an external thread, as shown in FIG. Figure 4d As shown, the light-shielding cover 2-5 is provided with an internal thread at one end facing the second filter tube 2-4.

[0055] like Figure 2As shown, the filter protection cover 2-1 is provided with a first circular through hole on one side facing the middle of the high-resolution camera placement room 1 and the anti-reflection background 3; the flange 2-2 is fixedly mounted on the filter protection cover 2-1 through the first circular through hole; Figure 4a As shown, the flange 2-2 is provided with a second circular through hole 2-2-1, and the flange of the flange 2-2 is located in the filter protection cover 2-1. The flange can increase the contact area between the flange 2-2 and the filter protection cover 2-1, so that the flange 2-2 can still be reliably installed on the filter protection cover 2-1 even when the warhead explodes; each filter tube is a round tube or sleeve provided with a circular filter hole, and the inner diameter and outer diameter of the filter tube are successively reduced along the direction from the flange 2-2 toward the light shielding cover 2-5; as shown in FIG. Figure 4e As shown, the adjustable filter 2-6 is annular and is provided with a third circular through hole 2-6-1; the light shielding cover 2-5 is provided with a fourth circular through hole 2-5-1; Figure 2 and Figure 3 As shown, the second circular through hole 2-2-1, the first circular filter hole 2-3-1, the second circular filter hole 2-4-1, the third circular through hole 2-6-1 and the fourth circular through hole 2-5-1 are connected to form a penetrator channel, so that the explosively formed penetrator 7 produced by the explosion of the warhead can pass through. The height of the first circular through hole is determined by the bracket 4 and the warhead caliber, and the aperture of the first circular through hole is 1-1.25 times the charge caliber; the aperture of the third circular through hole 2-6-1 is 0.4-0.7 times the charge caliber; the aperture of the fourth circular through hole 2-5-1 is larger than the aperture of the third circular through hole 2-6-1 and smaller than the aperture of the circular filter hole.

[0056] like Figure 1 As shown, the filter protection cover 2-1 is welded by a front protection plate, a top protection plate and two side protection plates; the front protection plate, the top protection plate and the side protection plates are all made of steel; the front protection plate is arranged in the vertical direction and is parallel to the axis of the lens, so that the direction in which the explosively formed penetrator 7 flies out is perpendicular to the axis of the lens; the horizontal distance between the front protection plate and the bracket 4 is 8-10 times the charge caliber; a first circular through hole is arranged at the center of the front protection plate, and a flange 2-2 is fixedly connected thereto; when a threaded connection is adopted, the first circular through hole is a threaded hole, and an external thread is arranged on the outer peripheral surface of the flange 2-2, and the external thread is threadedly connected to the threaded hole of the filter protection cover 2-1 through the external thread on the outer peripheral side of the flange 2-2; the two side protection plates are arranged obliquely in the vertical direction and are symmetrically distributed on both sides of the front protection plate; the top protection plate is arranged in the horizontal direction, overlapping the top of the side protection plate and the front protection plate; the bracket 4 is arranged in the space surrounded by the front protection plate, the top protection plate and the side protection plate.

[0057] In order to further improve the shooting effect, Figure 1As shown, the high-camera deployment room 1 includes a protective ladle and a protective steel plate 1-1; the protective ladle is provided with an optical observation window on the side facing the anti-reflective background, and the optical observation window adopts a single-layer bulletproof glass; the protective ladle is provided with a protective steel plate 1-1 on the side facing the filter protection device 2 through an adjustable angle limit mechanism and an articulated door axis mechanism. On the basis of the traditional protective ladle, the high-camera deployment room 1 adds a protective steel plate 1-1 on the explosion source incident side. The protective steel plate 1-1 is dynamically connected with the protective ladle through an articulated door axis mechanism, and cooperates with the adjustable angle limit mechanism to form a 90°-150° multi-level protection posture, which can effectively resist metal fragments generated by the explosion. Under this protection performance guarantee, its optical observation window can adopt a single-layer bulletproof glass and reduce the thickness, thereby eliminating the interference of glass mirror reflection.

[0058] The working process of the above-mentioned shooting device is as follows: Figure 7 As shown, when the shaped charge warhead explodes at the detonation point 5, the high-speed camera is triggered to record images. The filter protection device 2 blocks the instantaneous explosion light, and then the detonation product 6 flies out of the filter protection device 2 along with the explosively formed penetrator 7. After the detonation product 6 is filtered by the filter, the adjustable filter 2-6 and the light shielding cover 2-5, its concentration is reduced and the brightness is greatly attenuated, which can avoid overexposure of the photosensitive device of the high-speed camera and provide sufficient light intensity to meet the high-speed camera to take a clear image of the explosively formed penetrator 7. Figure 5 8 shows the field of view of the high-speed camera. Figure 6 As shown, when the present invention is not adopted, after the shaped charge warhead explodes at the detonation point 5, the detonation product 6 quickly spreads to the surroundings and wraps the explosively formed penetrator 7 therein.

[0059] The above-mentioned shooting device limits the irradiation angle and range of the explosion fire light through the filter protection device 2, avoids the overexposure phenomenon caused by the lens of the high-speed camera being covered in the light curtain area of ​​the explosion fire light, and provides sufficient light intensity for the explosively formed penetrator 7 for easy shooting. The filter protection device 2 is used to optimize the traditional high-speed photography technology, which is relatively cheap, and multiple experimental photos can be obtained at a time. At the same time, the requirements for natural light conditions are low, and clear images of high-speed explosively formed penetrators 7 can be captured, providing an efficient and low-cost testing means for obtaining images of the initial form and flight posture of the explosively formed penetrator 7.

[0060] The scattering angle of the explosion fire is determined by the inner diameter of the adjustable filter 2-6 and the distance between the filter and the detonation point 5. The flange 2-2 serves to lengthen the distance from the filter to the detonation point 5 and connect the filter protection cover 2-1 and the filter tube. The segmented filter tube can effectively reduce the concentration of the overflow of the detonation product 6 by reducing the aperture in a step-by-step manner, and accelerate the separation of the explosively formed penetrator 7 (EFP) and the detonation product 6. The light shielding cover 2-5 is used to fix the adjustable filter 2-6, and the adjustable filter 2-6 with a suitable aperture can be replaced according to the test conditions.

[0061] The protective ladle and anti-reflection background 3 are commonly used equipment in this field and will not be described in detail here.

[0062] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A device for photographing the initial state of an explosively formed penetrator, characterized in that: Includes high-definition camera placement room, light filter protection device, anti-reflective background and bracket; The high-speed camera placement room is spaced apart from and arranged opposite to the anti-reflection background; a high-speed camera is arranged in the high-speed camera placement room, the high-speed camera faces the anti-reflection background and the axis of the lens is arranged in the horizontal direction; the bracket is arranged in the filter protection device, and is used to fix and install the warhead that produces the explosively formed penetrator; The light filtering protection device is arranged on one side between the high-speed camera placement room and the anti-reflection background, and is provided with a penetrator channel, which is used to shield the explosion light and detonation products generated by the explosion of the warhead, so as to prevent the explosion light from overexposure of the high-speed camera, so as to capture the image of the explosively formed penetrator generated by the explosion of the warhead; The penetrator channel extends in the horizontal direction, and the axis of the penetrator channel is coplanar and perpendicular to the lens axis of the high-speed camera; the penetrator channel is used to allow the explosively formed penetrator to pass through and fly between the high-speed camera placement room and the anti-reflection background.

2. The device according to claim 1, characterized in that The light filtering protection device comprises a light filtering protection cover, a flange, at least two light filtering tubes, a light shielding cover and an adjustable light filter; The bracket is located in the filter protection cover; the flange, at least two filter tubes and the light shielding cover are coaxially connected in sequence; the adjustable filter is pressed against the last filter tube through the light shielding cover; The filter protection cover is provided with a first circular through hole on one side facing the middle of the high-speed camera placement room and the anti-reflection background; the flange is fixedly mounted on the filter protection cover through the first circular through hole; the flange is provided with a second circular through hole; each filter tube is a round tube provided with a circular filter hole, and the inner diameter and outer diameter of the filter tube decrease in sequence along the direction from the flange toward the light shielding cover; the adjustable filter is in a circular ring shape and is provided with a third circular through hole; the light shielding cover is provided with a fourth circular through hole; The second circular through hole, the circular filter hole, the third circular through hole and the fourth circular through hole are connected to form the penetrator channel.

3. The device according to claim 2, characterized in that The light filtering protective cover is formed by welding a front protective plate, a top protective plate and two side protective plates; The front protection plate is arranged in a vertical direction and is parallel to the axis of the lens; the first circular through hole is arranged at the center of the front protection plate and is fixedly connected to the flange; The two side protection plates are arranged obliquely along the vertical direction and are symmetrically distributed on both sides of the front protection plate; The top protective plate is arranged in the horizontal direction and overlaps the top of the side protective plate and the front protective plate; The front protective plate, the top protective plate and the side protective plates are all made of steel; The bracket is arranged in a space surrounded by the front protective plate, the top protective plate and the side protective plates.

4. The device according to claim 3, characterized in that The flange and the front protection plate, the flange and the filter tube, the filter tubes, and the light shielding cover and the filter tube are all connected by threads.

5. The device according to claim 4, characterized in that The light filtering protection device comprises two light filtering cylinders, namely a first light filtering cylinder and a second light filtering cylinder; One end of the first filter cylinder is provided with an external thread, and the other end is provided with an internal thread; Both ends of the second filter cylinder are provided with external threads; One end of the first filter cylinder is threadedly connected to the internal thread hole of the flange through an external thread, and the other end is threadedly connected to the external thread of the second filter cylinder through an internal thread; The other end of the second filter cylinder is threadedly connected to the light shielding cover through an external thread.

6. The device according to claim 3, characterized in that The aperture of the first circular through hole is 1-1.25 times the diameter of the charge; The diameter of the third circular through hole is 0.4-0.7 times the diameter of the charge; The aperture of the fourth circular through hole is larger than the aperture of the third circular through hole and smaller than the aperture of the circular filter hole.

7. The device according to claim 3, characterized in that The horizontal distance between the front protection plate and the bracket is 8-10 times the charge caliber.

8. The device according to claim 1, characterized in that The horizontal distance between the lens axis of the high-speed camera and the bracket is 35-40 times the charging aperture.

9. The device according to claim 2, characterized in that The adjustable filter is made of cardboard.

10. The device according to any one of claims 1 to 9, characterized in that The high-angle camera placement room includes a protective steel ladle and a protective steel plate; The protective ladle is provided with an optical observation window on the side facing the anti-reflection background, and the protective steel plate is installed on the side facing the light filtering protection device through an adjustable angle limit mechanism and an articulated door shaft mechanism; The optical observation window adopts single-layer bulletproof glass.

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