A device for photographing initial shape of explosively formed penetrator

Abstract

The application discloses a device for shooting the initial shape of an explosively formed penetrator, which comprises a high-speed camera room and an anti-reflection background; a support is arranged in a light filter protection device to fix a warhead for generating the explosively formed penetrator; the light filter protection device is arranged on one side of the high-speed camera room and the anti-reflection background and is provided with a penetrator channel to shield explosion fire and detonation products generated by the warhead explosion, so that the high-speed camera is not overexposed by the explosion fire, and the image of the explosively formed penetrator generated by the warhead explosion is shot; the axis of the penetrator channel is coplanar with and perpendicular to the lens axis of the high-speed camera. The shooting device can weaken the explosion fire, reduce the concentration of the detonation products accompanying the flight of the penetrator, and provide sufficient light intensity for the flying body, so that the initial shape of the explosively formed penetrator is captured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of dynamic testing of explosively formed penetrators, and particularly relates to a device for shooting initial shape of explosively formed penetrators. BACKGROUND

[0002] Explosively formed penetrator refers to a damage element formed by the explosion of a metal liner, such as a shaped charge jet, a rod-shaped jet or an explosively formed projectile. The shape parameters of the penetrator 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 shape of the explosively formed penetrator by dynamic testing technology. However, the explosively formed penetrator has a high flight speed (the speed range is about 2000-8000 m / s), and is accompanied by explosion light and continuous combustion of detonation products at the initial forming stage, which causes difficulties in shooting clear penetrator forming images.

[0003] Ordinary high-speed cameras can obtain multiple photos at a time and are relatively inexpensive, but are usually limited by the shooting environment and the matching of the light intensity of the photographed object and the high-speed camera photosensitive device. In order to eliminate the residual image of the high-speed flying penetrator, the high-speed camera needs to be set to a high shutter speed, which sharply shortens the exposure time, and therefore requires the photographed object to have a certain light intensity. When the high-speed camera is shooting at a position close to the initiation point, the explosion light will instantly disappear the penetrator, making it difficult to capture the image of the penetrator. If a pulsed laser light source is combined, the influence of the explosion light can be eliminated. However, there are a large number of particulate matters in the detonation products at the initial forming stage of the explosively formed penetrator, which will affect the reflection and reception of the laser signal, so the laser high-speed photography cannot capture the initial image of the explosively formed penetrator.

[0004] Traditional high-speed shooting protection systems mostly use protective steel boxes with windows, and the optical observation window is usually configured with multiple layers of composite bulletproof glass. Due to the thickness and layered structure of the material, the optical path difference is significant when the light wave penetrates through multiple layers of medium, causing multiple reflection effect, and finally forming a double image superposition phenomenon in the high-speed camera imaging system. This optical distortion appears as characteristic image blur and ghosting during high-speed shooting, and in the high-energy light scene such as detonation experiment, the incident light intensity increases exponentially, and the light path distortion effect will be further amplified, greatly reducing the shooting quality. Therefore, it is urgent to improve the protective steel box, which can not only eliminate the interference of glass mirror reflection, but also protect the high-speed camera.

[0005] Currently, pulsed X-ray shooting technology is mostly used at home and abroad to shoot the initial shape of the explosively formed penetrator, which uses short pulse X-ray to perform perspective imaging on high-speed moving objects. Two pulsed X-ray machines are usually used to set different light emission times and are placed in the light emission ports at an angle of 45°, so that two images can be shot at a time. Compared with high-speed photography technology, the pulsed X-ray shooting technology has limited shooting frames per time. Summary of the Invention

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

[0007] To achieve the above objectives, the present invention adopts the following specific technical solution:

[0008] An apparatus for photographing the initial morphology of an explosively formed penetrator, the apparatus comprising a high-angle deployment chamber, a light-filtering protection device, an anti-reflective background, and a support;

[0009] The high-speed camera deployment room is spaced apart from and opposite to the anti-reflective background; a high-speed camera is installed in the high-speed camera deployment room, the high-speed camera faces the anti-reflective background and the axis of the lens is set in the horizontal direction; the bracket is installed in the light filter protection device and is used to fix and install the warhead that generates explosively shaped penetrator;

[0010] The light filtering and protection device is located on one side between the high-speed camera deployment room and the anti-reflective background, and is provided with a penetrating body channel to block the explosion light and detonation products generated by the explosion of the warhead, so as to avoid the explosion light causing the high-speed camera to overexpose, so as to capture the image of the explosion-shaped penetrating body generated by the explosion of the warhead.

[0011] The penetrator channel extends horizontally, 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 fragments to fly between the high-speed camera deployment area and the anti-reflective background after the explosively formed penetrator passes through.

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

[0013] The bracket is located inside the filter protective 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 by the light-shielding cover;

[0014] The light-filtering protective cover has a first circular through-hole on the side facing the middle of the high-angle placement room and the anti-reflective background; the flange is fixedly installed on the light-filtering protective cover through the first circular through-hole; the flange has a second circular through-hole; each of the filter tubes is a circular tube with a circular filter hole, and the inner and outer diameters of the filter tubes decrease sequentially from the flange towards the light-shielding cover; the adjustable filter is annular and has a third circular through-hole; the light-shielding cover has 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 filter shield is constructed by welding together a front protective plate, a top protective plate, and two side protective plates;

[0017] The front protective plate is arranged vertically and parallel to the axis of the lens; the first circular through hole is provided at the center of the front protective plate, and the flange is fixedly connected thereto.

[0018] The two side protective plates are inclined in the vertical direction and symmetrically distributed on both sides of the front protective plate;

[0019] The top protective plate is arranged horizontally and overlaps 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 disposed within the space enclosed by the front protective plate, the top protective plate, and the side protective plate.

[0022] Furthermore, the flange and the front protective plate, the flange and the filter tube, the filter tubes, and the light-shielding cover and the filter tube are all connected by threads.

[0023] Furthermore, the light filtering protection device includes two filter tubes, namely a first filter tube and a second filter tube;

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

[0025] The second filter tube has external threads at both ends;

[0026] One end of the first filter tube is threaded to the internal thread hole of the flange via an external thread, and the other end is threaded to the external thread of the second filter tube via an internal thread.

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

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

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

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

[0031] Furthermore, the horizontal distance between the front protective plate and the bracket is 8-10 times the diameter of the explosive charge port;

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

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

[0034] Furthermore, the high-altitude deployment chamber includes a protective steel ladle and a protective steel plate;

[0035] The protective steel ladle has an optical observation window on the side facing the anti-reflective background, and the protective steel plate is installed on the side facing the light filtering protection device through an adjustable angle limiting mechanism and a hinged door hinge mechanism.

[0036] The optical observation window is made of single-layer bulletproof glass.

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

[0038] The imaging device of this invention limits the angle and range of the explosion's light through a light-filtering protection device, preventing overexposure of the high-speed camera lens by being covered by the light curtain of the explosion's light, and providing sufficient light intensity for the explosively formed penetrator to facilitate imaging. This invention optimizes traditional high-speed photography technology with a light-filtering protection device, is relatively inexpensive, can obtain multiple photos in a single shot, has low requirements for natural light conditions, and can capture clear images of high-speed explosively formed penetrators. It provides an efficient and cost-effective testing method for acquiring images of the initial morphology and flight attitude of explosively formed penetrators.

[0039] The scattering angle of the explosion light is determined by the inner diameter of the adjustable filter and the distance between the filter and the detonation point. The flange serves to extend the distance from the filter to the detonation point and connect the filter shield to the filter tube. The segmented filter tube, by gradually reducing the aperture, effectively weakens the concentration of detonation products and accelerates the separation of the explosively formed penetrator (EFP) from 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. Attached Figure Description

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

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

[0042] Figure 3 An isometric drawing of a light-filtering protection device;

[0043] Figures 4a-4e This is a schematic diagram of the structure of each component of the light filtering and protection device;

[0044] Figure 5 This is a schematic diagram of the operation of the light filtering and protection device;

[0045] Figure 6 This is a schematic diagram of a warhead exploding without the use of a light-filtering protection device.

[0046] Figure 7 This is a schematic diagram of a warhead explosion when a light-filtering protection device is used.

[0047] Reference numerals: 1-High-altitude camera deployment room, 2-Filter protection device, 3-Anti-reflective background, 4-Support, 5-Detonation point, 6-Detonation products, 7-Explosive-formed penetrator, 8-Filming field of view, 1-1-Protective steel plate, 2-1-Filter protection cover, 2-2-Flange, 2-3-First filter tube, 2-4-Second filter tube, 2-5-Light shield, 2-6-Adjustable filter, 2-2-1-Second circular through hole, 2-3-1-First circular filter hole, 2-4-1-Second circular filter hole, 2-5-1-Fourth circular through hole, 2-6-1-Third circular through hole. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] The imaging device of the present invention weakens the explosion light and reduces the concentration of detonation products 6 that accompany the explosively formed penetrator 7 by using the light filtering and protection device 2, thereby enabling close-up imaging of the initial morphology of the explosively formed penetrator 7.

[0050] like Figure 1 As shown in the diagram, this embodiment provides an apparatus for photographing the initial morphology of an explosively formed penetrator. The apparatus includes a high-angle deployment chamber 1, a light-filtering protection device 2, an anti-reflective background 3, and a support 4, wherein:

[0051] The high-resolution projection booth 1 and the anti-reflective background 3 are positioned opposite each other, with a gap between them; for example... Figure 1 As shown, the high-speed camera deployment chamber 1 is located on the left, the anti-reflective background 3 is located on the right, and the light-filtering protection device 2 is located on the side between the high-speed camera deployment chamber 1 and the anti-reflective background 3. A high-speed camera is installed inside the high-speed camera deployment chamber 1, facing the anti-reflective background 3 with its lens axis horizontally aligned. The lens axis is perpendicular to both the anti-reflective background 3 and the vertical plane. A bracket 4 is installed inside the light-filtering protection device 2 and is used to securely mount the warhead that generates the explosively formed penetrator 7. The horizontal distance between the high-speed camera's lens axis and the bracket 4 is 35-40 times the warhead caliber.

[0052] The light-filtering protection device 2 is located on one side between the high-exposure placement room 1 and the anti-reflective background 3, and is equipped with a penetrating agent channel; such as Figure 7 As shown, the light-filtering protection device 2 is used to shield the explosion flash and detonation products 6 generated by the warhead explosion, preventing overexposure of the high-speed camera by the explosion flash, so as to capture images of the explosively formed penetrator 7 generated by the warhead explosion through the high-speed camera. The penetrator channel extends horizontally, 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 fragments of the explosively formed penetrator 7 to fly between the high-angle deployment room 1 and the anti-reflective background 3 after passing through.

[0053] like Figure 2 and Figure 3 As shown, the light filtering protection device 2 includes a light filtering protective cover 2-1, a flange 2-2, at least two filter tubes, a light shield 2-5, and an adjustable filter 2-6; the filter tubes can be two, three, or more; in this embodiment, two filter tubes are used as an example, namely the first filter tube 2-3 and the second filter tube 2-4, as shown. Figure 2As shown, the left end of the first filter tube 2-3 is fixedly installed to the flange 2-2 by threads, and the right end is connected to the left end of the second filter tube 2-4 by threads. The right end of the second filter tube 2-4 is connected to the light shield 2-5 by threads. When three or more filter tubes are provided, they are connected sequentially from left to right. The leftmost filter tube is fixedly connected to the flange 2-2, and the rightmost filter tube is fixedly connected to the light shield 2-5. Along the direction from the flange 2-2 towards the light shield 2-5, the size of the filter tubes decreases sequentially. That is, in two adjacent filter tubes, the inner diameter of the left filter tube is equal to the outer diameter of the right filter tube. By reducing the radial size of the filter tubes in a stepped manner, the concentration of detonation products 6 can be effectively reduced. The radial size of the filter tube is determined by the radial size of the front connector. Multiple filter tubes can be assembled according to the warhead charge caliber and fragment size. The filter tubes can be connected by threads.

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

[0055] like Figure 2As shown, the filter shield 2-1 has a first circular through hole on the side facing the middle of the high-angle placement room 1 and the anti-reflective background 3; the flange 2-2 is fixedly installed on the filter shield 2-1 through the first circular through hole; as shown Figure 4a As shown, flange 2-2 is provided with a second circular through hole 2-2-1. The flange of flange 2-2 is located inside the light filter shield 2-1. The flange increases the contact area between flange 2-2 and light filter shield 2-1, allowing flange 2-2 to be reliably installed in light filter shield 2-1 even when the warhead explodes. Each filter tube is a circular tube or sleeve with a circular filter hole, and the inner and outer diameters of the filter tubes decrease sequentially from flange 2-2 towards light shield 2-5. Figure 4e As shown, the adjustable filter 2-6 is annular and has a third circular through-hole 2-6-1; the light-shielding cover 2-5 has a fourth circular through-hole 2-5-1; as 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, allowing the explosively formed penetrator 7 generated by the warhead explosion to pass through. The height of the first circular through-hole is determined by the support 4 and the diameter of the warhead. The diameter of the first circular through-hole is 1-1.25 times the diameter of the explosive charge; the diameter of the third circular through-hole 2-6-1 is 0.4-0.7 times the diameter of the explosive charge; the diameter of the fourth circular through-hole 2-5-1 is larger than the diameter of the third circular through-hole 2-6-1 but smaller than the diameter of the circular filter hole.

[0056] like Figure 1 As shown, the filter shield 2-1 is constructed by welding a front shield plate, a top shield plate, and two side shield plates. All three are made of steel. The front shield plate is vertically aligned and parallel to the lens axis, ensuring that the direction in which the explosively formed penetrator 7 flies out is perpendicular to the lens axis. The horizontal distance between the front shield plate and the support 4 is 8-10 times the diameter of the propellant nozzle. A first circular through-hole is located at the center of the front shield plate, and a flange 2-2 is fixedly connected thereto. When a threaded connection is used, the first circular through-hole is a threaded hole, and the outer circumference of the flange 2-2 is provided with external threads, which are then threaded into the threaded hole of the filter shield 2-1. The two side shield plates are vertically inclined and symmetrically distributed on both sides of the front shield plate. The top shield plate is horizontally aligned and overlaps the top of the side and front shield plates. The support 4 is located within the space enclosed by the front, top, and side shield plates.

[0057] To further improve the shooting effect, such as Figure 1As shown, the high-altitude camera deployment chamber 1 includes a protective steel ladle and a protective steel plate 1-1. The protective steel ladle has an optical observation window on the side facing the anti-reflective background, and the optical observation window uses single-layer bulletproof glass. The protective steel plate 1-1 is installed on the side of the protective steel ladle facing the light-filtering protection device 2 via an adjustable angle limiting mechanism and a hinged door hinge mechanism. The high-altitude camera deployment chamber 1 adds a protective steel plate 1-1 to the side of the blast source incident on the basis of a traditional protective steel ladle. This protective steel plate 1-1 achieves dynamic connection with the protective steel ladle through a hinged door hinge mechanism, and, in conjunction with the adjustable angle limiting mechanism, forms a multi-level protective posture of 90°-150°, which can effectively resist metal fragments generated by the explosion. With this protective performance, its optical observation window can use single-layer bulletproof glass with a reduced thickness, thereby eliminating interference from glass mirror reflection.

[0058] The working process of the above-mentioned shooting device is as follows: Figure 7 As shown, when the shaped charge detonates at detonation point 5, it triggers the high-speed camera to record images. The light-filtering protection device 2 blocks the instantaneous explosion flash. Then, the detonation products 6, along with the blast-shaped penetrator 7, fly out of the light-filtering protection device 2. After being filtered by the filter, adjustable filter 2-6, and light-shielding cover 2-5, the concentration of the detonation products 6 is reduced, and the brightness is greatly reduced, which can prevent overexposure of the high-speed camera's photosensitive device, while providing sufficient light intensity to allow the high-speed camera to capture clear images of the blast-shaped penetrator 7. Figure 5 This illustrates the field of view (8) of the high-speed camera. And as... Figure 6 As shown, when the present invention is not used, after the shaped charge explodes at the detonation point 5, the detonation products 6 rapidly spread in all directions and encapsulate the explosively shaped penetrator 7.

[0059] The aforementioned imaging device uses a light-filtering protection device 2 to limit the angle and range of the explosion's light, preventing the high-speed camera lens from being overexposed within the light curtain of the explosion's light and providing sufficient light intensity for the explosively formed penetrator 7 to facilitate imaging. The use of the light-filtering protection device 2 optimizes traditional high-speed photography techniques, is relatively inexpensive, allows for the acquisition of multiple experimental photos in a single shot, has lower requirements for natural light conditions, and can capture clear images of the high-speed explosively formed penetrator 7. This provides an efficient and cost-effective testing method for acquiring images of the initial morphology and flight attitude of the explosively formed penetrator 7.

[0060] The scattering angle of the explosion light 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 extend the distance from the filter to the detonation point 5 and connect the filter shield 2-1 to the filter tube. The segmented filter tube, by gradually reducing the aperture, effectively weakens the concentration of detonation products 6 and accelerates the separation of the explosively formed penetrator 7 (EFP) from the detonation products 6. The light-shielding cover 2-5 is used to fix the adjustable filter 2-6 and can be replaced with an adjustable filter 2-6 of appropriate aperture according to the test conditions.

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

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

Claims

1. An apparatus for taking a picture of an initial shape of an explosively formed penetrator, characterized in that, The high camera placement room, the light filter protection device, the anti-reflection background and the support are included. The high camera placement room is spaced apart from the anti-reflection background and is oppositely arranged; a high-speed camera is arranged in the high camera placement room, the high-speed camera faces the anti-reflection background, and the axis of the lens of the high-speed camera is arranged in a horizontal direction; the support is arranged in the light filter protection device and is used for fixedly mounting a warhead for generating an explosively formed penetrator; The light filter protection device is arranged on one side between the high camera placement room and the anti-reflection background, and is provided with a penetrator channel, which is used for shielding explosion light and detonation products generated by explosion of the warhead, avoiding overexposure of the high-speed camera caused by the explosion light, and photographing an image of the explosively formed penetrator generated by explosion of the warhead; The penetrator channel extends in the horizontal direction, the axis of the penetrator channel is coplanar with and perpendicular to the lens axis of the high-speed camera; and the penetrator channel is used for enabling the explosively formed penetrator to pass through the high camera placement room and the anti-reflection background. The light filter protection device includes a light filter protection cover, a flange, at least two light filter barrels, a light shield cover and an adjustable light filter. The support is located in the light filter protection cover; the flange, the at least two light filter barrels and the light shield cover are coaxially connected in sequence; and the adjustable light filter is pressed against the last light filter barrel through the light shield cover. The light filter protection cover is provided with a first circular through hole on the side facing between the high camera placement room and the anti-reflection background; the flange is fixedly mounted on the light filter protection cover through the first circular through hole; the flange is provided with a second circular through hole; each light filter barrel is a circular tube provided with a circular light filter hole, and the inner diameter and the outer diameter of the light filter barrel gradually decrease in the direction from the flange to the light shield cover; the adjustable light filter is a circular ring provided with a third circular through hole; and the light shield cover is provided with a fourth circular through hole. The second circular through hole, the circular light filter hole, the third circular through hole and the fourth circular through hole are communicated to form the penetrator channel.

2. The apparatus of claim 1, wherein, The light filter protection cover is composed of a front protection plate, a top protection plate and two side protection plates by welding; 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 the flange is fixedly connected to the front protection plate; The two side protection plates are arranged in a vertical direction and are symmetrically distributed on the two sides of the front protection plate; The top protection plate is arranged in a horizontal direction and is overlapped on the top of the side protection plates and the front protection plate; The front protection plate, the top protection plate and the side protection plates are all made of steel; The support is arranged in the space surrounded by the front protection plate, the top protection plate and the side protection plates.

3. The apparatus of claim 2, wherein, Threaded connections are adopted between the flange and the front protection plate, between the flange and the light filter barrels, between the light filter barrels and between the light shield cover and the light filter barrels.

4. The apparatus of claim 3, wherein, The light filter protection device includes two light filter barrels, which are a first light filter barrel and a second light filter barrel. One end of the first filter cylinder is provided with external threads, and the other end is provided with internal threads; 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 threaded hole of the flange through external threads, and the other end is threadedly connected to the external threads of the second filter cylinder through internal threads; The other end of the second filter cylinder is threadedly connected to the light shield cover through external threads.

5. The apparatus of claim 2, wherein, The aperture of the first circular through hole is 1-1.25 times the charge caliber; The aperture of the third circular through hole is 0.4-0.7 times the charge caliber; The aperture of the fourth circular through hole is larger than that of the third circular through hole and smaller than that of the circular filter hole.

6. The apparatus of claim 2, wherein, The horizontal distance between the front protective plate and the support is 8-10 times the charge caliber.

7. The apparatus of claim 1, wherein, The horizontal distance between the lens axis of the high-speed camera and the support is 35-40 times the charge caliber.

8. The apparatus of claim 1, wherein, The material of the adjustable filter is hardboard.

9. The apparatus of any of claims 1-8, wherein, The high-speed camera room includes a protective steel bucket and a protective steel plate; The protective steel bucket 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 filter protection device through an adjustable angle limiting mechanism and a hinged door shaft mechanism; The optical observation window adopts single-layer bulletproof glass.

Images