Ship gun sea shooting target based on measuring grating array

Abstract

The invention discloses a measuring grating array-based target for shooting a ship gun to the sea, and belongs to the technical field of ship gun shooting training guarantee. The measuring grating arrays and the electric control system matched with the grating arrays are arranged on the two sides of the target base frame, and the electric control system judges the property of the projectile and measures the speed of the projectile according to the time when the projectile passes through the grating arrays; according to the method, the influence of bouncing on the hit rate can be rapidly eliminated, counting of the number of normally hit projectiles is achieved, and the accurate number of the hit projectiles is given; and meanwhile, the speed of the projectile can be measured by measuring the grating array. According to the method, the difficulty of effectively hitting the bullet in sea shooting detection by the ship gun is greatly reduced, and the accuracy of determining the hit probability of sea shooting by the ship gun is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of naval gun firing training support, and in particular relates to a naval gun sea firing target based on a measuring grating array. Background Art

[0002] In order to detect the number of hits during the sea-to-sea shooting training of naval guns, the commonly used method is to determine the number of hit shells by counting the number of bullet holes on the target. In the Chinese invention patent CN116338675B (Radar-based, optoelectronics-based naval gun sea-to-sea shooting miss amount measurement system and method), a ship-borne target detection and measurement system configured by a ship-borne observation station is disclosed. The radar and optoelectronics are used to jointly observe the spherical target and the water column of the shell falling into the water in the shooting target area, collect data, locate and track the processing, realize the intelligent real-time calculation of the miss amount, and provide a basis for the hit accuracy evaluation. In the Chinese utility model patent CN212274732U, it is disclosed that a sensor carrier is used to receive shock waves, and the actual shell landing point coordinates are calculated according to the time when each sensor carrier receives the shock wave and its time difference.

[0003] In these two methods for detecting the number of hit shells, radar optoelectronics and sound waves are used to detect the position where the projectile falls into the water, which can meet the need to determine the number of hit shells in naval gun sea shooting to a certain extent. Since the shells and projectiles may produce the phenomenon of "skipping" when falling into the water, that is, the phenomenon of "ricocheting", in actual naval gun sea shooting training, the hits formed by "ricocheting" are not counted in the number of effective hit shells. At present, after the entire shooting process is completed, the photos or video images taken are manually analyzed one by one to determine whether it is a "ricochet". If the bullet hole is caused by the "ricochet" hitting the target, it is not counted in the number of hit shells. This method requires manual analysis of each shot afterwards, resulting in poor timeliness and convenience; in addition, due to the long distance when shooting, or weather reasons such as rain and fog, the photos or video images taken are not clear at all, resulting in poor accuracy. Therefore, how to quickly, automatically and accurately remove the number of false hit shells formed by "ricocheting" has not yet been proposed in the prior art. An effective solution. Summary of the invention

[0004] In order to overcome the defect in the prior art that it is impossible to automatically eliminate the influence of "ricochets" and accurately determine the number of hit shells, the present invention provides a naval gun anti-sea shooting target based on a measuring grating array, which can effectively identify and eliminate "ricochets" and obtain the accurate number of hit shells, and can be used to manufacture naval gun anti-sea shooting targets, etc.

[0005] The technical solution of the present invention is:

[0006] A naval gun sea-to-sea shooting target based on a measuring grating array, comprising a target body, a measuring grating and an electric control system;

[0007] The target body includes a target base frame and a target column; in order to distinguish ricochets and measure the speed of the projectile when it reaches the target, at least two target columns are symmetrically arranged on both sides of the target base frame, and the distances between the target columns on each side are the same;

[0008] The measuring grating comprises a grating signal emitting unit and a grating signal receiving unit; the target columns on both sides of the target base frame, one of which has a plurality of grating signal emitting units arranged at equal intervals along the vertical direction, and the other of which has a grating signal receiving unit arranged oppositely to the grating signal emitting unit, and the adjacent grating signal emitting units or grating signal receiving units on the adjacent target columns on the same side are located in the same horizontal plane;

[0009] The electronic control system includes a timing module, a counting module, a ricochet determination module and a speed calculation module; the timing module provides a time reference for each module; the ricochet determination module is connected to the grating signal receiving unit to determine whether the hitting projectile is a normal hitting projectile or a ricochet; the counting module counts the projectiles determined as normal hits by the ricochet determination module; the speed calculation module calculates the speed of the projectile determined as a normal hitting projectile by the ricochet determination module.

[0010] Furthermore, the grating signal receiving unit sends the status of whether the light signal is received and the corresponding time to the ricochet determination module. The ricochet determination module determines the direction of the projectile's movement based on the time it takes for the projectile to pass through the grating array. The specific determination method is as follows: when the projectile first blocks the reception of the light signal of the upper grating unit and then blocks the reception of the light signal of the lower grating unit, that is, the movement direction of the projectile is from top to bottom, then this projectile is a normal hit projectile; otherwise, the movement direction of the projectile is from bottom to top, then this projectile is a ricochet.

[0011] Furthermore, the speed calculation module calculates the speed formula of the projectile passing through the target as follows:

[0012]

[0013] Among them, v represents the speed of the projectile when it passes through the target, a is the distance between two adjacent grating signal emitting units or grating signal receiving units in the vertical direction, b is the distance between two adjacent grating signal emitting units or grating signal receiving units in the horizontal direction, θ is the angle at which the projectile is incident on the target, and t2-t1 is the time interval for the projectile to pass through the grating units on adjacent target columns.

[0014] Furthermore, the projectile enters the water at an angle of α to the horizontal plane. In order to block the reception of signals from two grating units in succession when the projectile passes through the target, the interval between the target columns on each side is Wherein H is the height of the target column; the value of α is 5° to 66°.

[0015] Furthermore, in order to ensure that all projectiles passing through the measuring grating are detected, the interval between two adjacent grating signal emitting units or the interval between the grating signal receiving units on each target column is smaller than the diameter D of the projectile, that is, a<D.

[0016] Furthermore, the electronic control system also includes a power module and a storage module; the power module provides power to each module; the storage module stores the speed and number of the normal hitting projectiles and marks the time when storing.

[0017] Furthermore, a data interface is provided on the storage module for data export.

[0018] Furthermore, the target base frame is a rectangular frame structure; a plurality of buoyancy barrels are provided at the bottom of the target base frame, and the buoyancy barrels provide buoyancy of 5 times the weight of the target.

[0019] Beneficial effects of the present invention: The measuring grating array naval gun sea-to-sea shooting target of the present invention can quickly eliminate the influence of "ricochet" on the hit rate, realize the counting of the number of normal hit projectiles, and give the accurate number of hit projectiles; at the same time, the speed of the projectile can be measured by measuring the grating array. The present invention greatly reduces the difficulty of detecting effective hit projectiles in naval gun sea-to-sea shooting and improves the accuracy of determining the hit probability of naval gun sea-to-sea shooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the naval gun firing target at sea according to the present invention.

[0021] Figure 2 It is a functional principle diagram of the electric control system of the present invention.

[0022] Figure 3 The present invention is a schematic diagram of the principle of determining ricochet when firing a target at sea using a naval gun.

[0023] Figure 4 The present invention is a schematic diagram of the principle of measuring the velocity of a projectile when firing a target at sea using a naval gun.

[0024] Figure 5 It is a schematic diagram of the target base framework described in an embodiment of the present invention.

[0025] Figure 6 Schematic diagram of the target column described in the embodiment of the present invention.

[0026] In the figure: 1 target base frame; 2 target column; 3 measuring grating. DETAILED DESCRIPTION

[0027] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and technical solutions.

[0028] like Figure 1 As shown, an embodiment of the present invention provides a naval gun sea-to-sea shooting target based on a measuring grating array, comprising a target body, a measuring grating 3 and an electric control system.

[0029] like Figure 1 As shown, the target body includes a target base frame 1 and a target column 2; the target base frame 1 is 22000mm long and 2000mm wide, and is constructed of H-shaped steel components with specifications of H200×200×8×12. Figure 5 As shown, in order to ensure strength, 5 H-shaped steel members are welded into a frame at intervals of 500mm; a thick steel plate skin is installed on the target base frame 1, and the length×width×thickness of the skin is 22000mm×2000mm×10mm.

[0030] There are 6 target columns 2, which are symmetrically arranged on both sides of the target base frame 1. Three angle steels (specifications 50mm×50mm×4mm) with a length of 6500mm are used as target columns on each side, and each angle steel is welded to the target base frame 1. Figure 6 ; Assuming the projectile diameter is 76mm, it enters the water at an angle of 60° to the horizontal plane, and the target column height is 6500mm, then the distance between the two adjacent angle steels on each side is Set to 200mm.

[0031] Buoyancy barrels are arranged below the target base frame 1. In order to ensure that some of the buoyancy barrels are damaged by the projectiles, they can still provide sufficient buoyancy, which is required to provide buoyancy of 5 times the weight of the target. The buoyancy barrels are dispersedly configured.

[0032] Buoyancy calculation formula: F = 5 × (7 × GH + Gm + 6 × Gz + GF)

[0033] Wherein: GH is the weight of the H-shaped steel structure, Gm is the weight of the steel plate skin, Gz is the weight of the target column, and GF is the weight of accessories such as gratings and batteries.

[0034] The weight of the H-shaped steel member is 50.5 kg per meter, so GH=22m×50.5kg / m=1111kg.

[0035] The density of the steel plate skin is 7.85kg / m 3 , then Gm=22m×2m×10mm×7.85=345.4kg.

[0036] The weight of the angle steel is 3.059 kg per meter, so Gz=6.5m×3.059kg / m=19.9kg.

[0037] The total weight of the accessories including batteries and gratings is about 50kg.

[0038] In summary, the buoyancy provided is: F = 5 × (7 × GH + Gm + 6 × Gz + GF) = 41459 kg.

[0039] Measuring gratings are configured on the left and right target columns. In order to be able to fully detect the projectile passing through the measuring grating array, the upper and lower intervals of each column of grating units are set to 75mm; grating units are assembled on each angle steel at intervals of 75mm, with a total of 86 grating units in each column and a total of 258 pairs of grating units in the entire target. Anti-vibration and anti-seawater measures are required during assembly.

[0040] like Figure 2 As shown, the electronic control system includes a timing module, a power module, a counting module, a ricochet determination module, a speed calculation module and a storage module; the timing module provides a time reference for each module, the power module provides power for each module, the counting module counts when it is determined to be a normal hit, and does not count when it is determined to be an abnormal hit, that is, a "ricochet"; the ricochet determination module determines the nature of the hit projectile, whether it is a normal hit projectile and an abnormal hit projectile ("ricochet"), and if it is determined to be a normal hit projectile, a counting instruction is sent to the counting module, and the counting module counts; the speed calculation module calculates the speed of the projectile determined to be a normal hit; the storage module stores the number of normal hit projectiles and the speed of each normal hit projectile, and marks the time when storing.

[0041] The ricochet determination module is connected to the grating signal receiving unit, and the grating signal receiving unit sends the state of whether the light signal is received and the corresponding time to the ricochet determination module. The ricochet determination module determines "ricochet" in the following manner:

[0042] like Figure 3 As shown in Figure 1, the direction of the projectile's motion is determined by the time it takes the projectile to pass through the grating. Assume that the projectile passes through A at time t1. i A` i Grating, passing through B at time t2 i+1 B` i+1 Grating, then passes through C at time t3 i+2 C` i+2 grating, it is determined that the projectile is moving from top to bottom, and it can be considered as a normal hit. On the contrary, if the projectile passes through A at time t4 i+2 A` i+2 Grating, passing through B at time t5 i+1 B` i+1 Grating, then passes through C at time t6 i C` i If the grating is detected, it is determined that the direction of the projectile is from bottom to top, and it can be identified as an abnormal hit of the projectile, that is, a "ricochet".

[0043] The method for calculating the speed of the projectile passing through the target is as follows:

[0044] like Figure 4 As shown, OP is the path of the projectile passing through the target, and O is the path of the projectile passing through A i A` i The point where the projectile passes through B i+1 B` i+1 O to B i+1 B` i+1 perpendicular line, intersecting at point N; O to A i+1 A` i+1 perpendicular line, intersecting at point M; let line segment OM = a, line segment MN = b, line segment ON = c, line segment OP = d, then The angle at which the projectile hits the target is θ, then So the projectile speed

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. A naval gun sea-to-sea target shooting device based on a measuring grating array, characterized in that: It includes a target body, a measuring grating and an electric control system; The target body includes a target base frame and a target column; at least two target columns are symmetrically arranged on both sides of the target base frame, and the distances between the target columns on each side are the same; The measuring grating includes a grating signal emitting unit and a grating signal receiving unit; the target columns on both sides of the target base frame, one of which has a plurality of grating signal emitting units arranged at equal intervals along the vertical direction, and the other of which has a grating signal receiving unit arranged oppositely to the grating signal emitting unit, and the adjacent grating signal emitting units or grating signal receiving units on the adjacent target columns on each side are located in the same horizontal plane; The electronic control system includes a timing module, a counting module, a ricochet determination module and a speed calculation module; the timing module provides a time reference for each module; the ricochet determination module is connected to the grating signal receiving unit to determine whether the hit projectile is a normal hit projectile or a ricochet; the counting module counts the projectiles determined as normal hits by the ricochet determination module; The speed calculation module calculates the speed of the projectile determined by the ricochet determination module as a normal hit.

2. A naval gun sea-to-sea shooting target based on a measuring grating array according to claim 1, characterized in that: The grating signal receiving unit sends the status of whether the light signal is received and the corresponding time to the ricochet determination module. The ricochet determination module determines the direction of the projectile's movement according to the time it takes the projectile to pass through the grating array. The specific determination method is as follows: when the projectile first blocks the reception of the light signal of the upper grating unit and then blocks the reception of the light signal of the lower grating unit, that is, the movement direction of the projectile is from top to bottom, then this projectile is a normal hit projectile; otherwise, the movement direction of the projectile is from bottom to top, then this projectile is a ricochet.

3. The naval gun sea-to-sea shooting target based on the measurement grating array according to claim 1, characterized in that: The speed calculation module calculates the speed formula of the projectile passing through the target as follows: Among them, v represents the speed of the projectile when it passes through the target, a is the distance between two adjacent grating signal emitting units or grating signal receiving units in the vertical direction, b is the distance between two adjacent grating signal emitting units or grating signal receiving units in the horizontal direction, θ is the angle at which the projectile is incident on the target, and t2-t1 is the time interval for the projectile to pass through the grating units on adjacent target columns.

4. The naval gun sea-to-sea shooting target based on the measurement grating array according to claim 1, characterized in that: The spacing between the target pillars on each side Where H is the height of the target column, α is the angle between the projectile and the horizontal plane when it enters the water, and α ranges from 5° to 66°.

5. The naval gun sea-to-sea shooting target based on the measurement grating array according to claim 1, characterized in that: The interval a between two adjacent grating signal emitting units or the interval a between two adjacent grating signal receiving units on each target column is smaller than the diameter D of the projectile.

6. The naval gun sea-to-sea shooting target based on the measurement grating array according to claim 1, characterized in that: The electric control system also includes a power module and a storage module; the power module provides power to each module; the storage module stores the speed and number of the normal hitting projectiles and marks the time when storing.

7. A naval gun sea-to-sea shooting target based on a measurement grating array according to claim 6, characterized in that: The storage module is provided with a data interface for data export.

8. The naval gun sea-to-sea shooting target based on the measurement grating array according to claim 1, characterized in that: A plurality of buoyancy barrels are arranged at the bottom of the target base frame.

9. A naval gun sea-to-sea shooting target based on a measuring grating array according to claim 8, characterized in that: The buoyancy barrel provides a buoyancy of 5 times the weight of the target.

10. The naval gun sea-to-sea shooting target based on the measurement grating array according to claim 1, characterized in that: The target base frame is a rectangular frame structure.

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