CN117589012A

CN117589012A - Shot test bullet and recovery method and device thereof

Info

Publication number: CN117589012A
Application number: CN202310360149.XA
Authority: CN
Inventors: 王亚楠; 伍思宇; 闫振展; 海日瀚; 赵越; 刘霜霜; 鲁佳
Original assignee: China Wanbao Engineering Co Ltd
Current assignee: China Wanbao Engineering Co Ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2024-02-23

Abstract

The application discloses a test bullet is penetrated to big gun, test bullet includes: the first shell is provided with a first groove-shaped structure and a second groove-shaped structure which are symmetrically arranged; the antenna is arranged in the first groove-shaped structure and the second groove-shaped structure and is used for receiving satellite signals; the missile-borne receiver circuit box is arranged in the first shell, connected with the antenna and used for determining the current position of the test missile according to the satellite signals; the buffer structure is connected with the missile-borne receiver circuit box and is used for reducing the overload influence on the missile-borne receiver circuit box in the process of launching the test missile; the base component is arranged at one end of the first shell and is provided with an abutting part and a connecting part, the abutting part is abutted with the missile-borne receiver circuit box, the connecting part is connected with the first shell, and a cavity structure is arranged between the abutting part and the connecting part. Meanwhile, the application also discloses a test bullet recovery device and a test bullet recovery method.

Description

Shot test bullet and recovery method and device thereof

Technical Field

The application relates to a shot test bullet and a recovery method and a recovery device thereof.

Background

The satellite guided forced projectile is guided forced projectile by a satellite/geomagnetism+pulse rocket after exiting from a bore. The satellite guidance force bomb quickly and accurately kills high-value targets such as enemy forces, ground technical weapons, command, control, communication systems and the like in various complex terrains with high initial hit rate, and is rapidly developed in recent years. In the initial stage of launching, under the action of the rifling, a missile-borne satellite signal receiver (hereinafter referred to as a missile-borne receiver) in the satellite guided forced missile can bear axial overload of up to tens of thousands of g, so that a serious test is formed on the overload resistance of electronic devices in the satellite guided forced missile. In order to study the overload resistance of the missile-borne receiver at the moment of satellite guidance and force-launch, a shot-to-fire test needs to be carried out to measure the dynamic mechanical response of the missile-borne receiver, and test data for verification is provided for simulation analysis. The gun firing can well simulate the overload environment in the satellite guidance forced firing process, and the reality of the repeated high overload (5000 g-15000 g) environment is ensured. Thus, it is necessary to design a dedicated test cartridge for the structure and characteristics of the missile-borne receiver.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a shot test bullet and a method and apparatus for recovering the same.

The technical scheme of the application is realized as follows:

according to an aspect of the present application, there is provided a shot test bullet, the test bullet comprising:

the first shell is provided with a first groove-shaped structure and a second groove-shaped structure which are symmetrically arranged;

the antenna is arranged in the first groove-shaped structure and the second groove-shaped structure and is used for receiving satellite signals;

the missile-borne receiver circuit box is arranged in the first shell, connected with the antenna and used for determining the current position of the test missile according to the satellite signals;

the buffer structure is connected with the missile-borne receiver circuit box and is used for reducing the overload influence on the missile-borne receiver circuit box in the process of launching the test missile;

the base component is arranged at one end of the first shell and is provided with an abutting part and a connecting part, the abutting part is abutted with the missile-borne receiver circuit box, the connecting part is connected with the first shell, and a cavity structure is arranged between the abutting part and the connecting part.

In the above scheme, the buffer structure includes:

the first buffer piece is arranged between the missile-borne receiver circuit box and the first shell;

the second buffer piece is arranged between the missile-borne receiver circuit box and the base component;

wherein the first cushioning member and the second cushioning member have different cushioning properties.

In the above-mentioned scheme, the cushioning properties of the first cushioning member and the second cushioning member are different as follows:

the first buffer piece is made of at least one material selected from elastic nylon, polyurethane and pine blocks, and the elastic nylon material meets preset elastic conditions;

the second cushioning member is made of a polyurethane foam material having a density of 0.25-g-0.32 g/cm 3.

In the above scheme, a first gap is formed between the missile-borne receiver circuit box and the first shell; the first buffer has a first thickness from the missile-borne receiver circuit box side to the first housing side, the first thickness being greater than the first gap.

In the above scheme, the first thickness is 0.1-0.15mm larger than the first gap.

In the above aspect, the base assembly includes:

the base body is provided with the connecting part and the concave part;

the first end of the base cover is abutted with the missile-borne receiver circuit box, and the second end of the base cover is connected with the first end of the base body to form the cavity structure;

the concave part is arranged opposite to the cavity structure, and the diameter of the concave part is greater than or equal to 40mm.

In the above scheme, the test bullet further comprises a protective cover, which is covered on the first groove-shaped structure and the second groove-shaped structure and is used for protecting the antenna.

In the above scheme, one end of the first shell, which is far away from the base component, is in a truncated cone-shaped structure, and the cone angle of the truncated cone-shaped structure is 45 degrees to 75 degrees.

In the foregoing aspect, the first housing and the base assembly are made of a rigid material.

According to another aspect of the present application, there is provided a test bullet recovery apparatus for recovering a shot test bullet of any one of the above; the recovery device includes:

the second shell is arranged on the base and is provided with a cavity structure, and the inner diameter parameter of the cavity structure is larger than the outer diameter parameter of the test bullet;

the baffle is movably arranged at the first end part, the second end part and the middle part of the second shell respectively so as to divide the cavity structure into at least two cavities, wherein the at least two cavities are coaxially arranged, and the axial direction of the cavities is the same as the emission direction of the test bullet;

the filling structures are respectively arranged in the at least two cavities, and the densities of the filling structures in the at least two cavities are different;

and the base is connected with the second shell and used for bearing the second shell.

In the above scheme, the baffle will cavity structure is separated into three cavity, the filling structure in three cavity is from the launching direction of experimental bullet is liquid filling structure, solid and liquid's mixed filling structure, solid filling structure in proper order.

According to a third aspect of the present application, there is provided a method of recovering a test cartridge, the method being applied to any one of the above test cartridge recovery apparatus, the method comprising:

in response to detecting that the test bullet is completely launched, controlling a middle baffle plate of the test bullet recovery device to pop up the second shell; detecting whether the middle baffle plate is provided with an elastic perforation or not;

if the middle baffle plate is provided with the bullet hole, controlling a rear baffle plate of the test bullet recovery device to pop up the second shell so as to search the test bullet on the rear baffle plate;

if the middle baffle plate is not provided with the bullet perforation, controlling a front baffle plate of the test bullet recovery device to pop up the second shell so as to search the test bullet on the front baffle plate or search the test bullet in a cavity area close to the front baffle plate;

the middle baffle is located between the front baffle and the rear baffle, the front baffle is located at one end, close to the test bullet emission direction, of the test bullet recovery device, and the rear baffle is located at one end, far away from the test bullet emission direction, of the test bullet recovery device.

The shot test bullet and the recovery method and the recovery device thereof can avoid the ablation influence of gunpowder gas on a bullet-borne receiver circuit in the process of launching the test bullet, lighten the whole quality of the test bullet, reduce the recovery difficulty of the test bullet and improve the recovery efficiency and the integrity of the test bullet.

Drawings

FIG. 1 is a schematic cross-sectional view of the structural composition of a shot test projectile of the present application;

FIG. 2 is a schematic perspective view showing the structural composition of a shot test projectile in the present application;

FIG. 3 is a schematic view in partial cross-section of the test cartridge incorporated into an artillery according to the present application;

FIG. 4 is a schematic cross-sectional view of the structural components of the test bullet recovery apparatus of the present application;

FIG. 5 is a schematic diagram showing a cross section of the structural components of the test bullet recovery apparatus of the present application;

FIG. 6 is a schematic diagram of a process for implementing the method for recovering test cartridges in the present application;

fig. 7 is a schematic view of a recovery scenario of the test cartridge in the present application.

Detailed Description

The technical scheme of the application is further elaborated below with reference to the drawings in the specification and the specific embodiments.

Various combinations of the features described in the embodiments may be implemented without contradiction, for example, different embodiments may be formed by combining different features, and various possible combinations of the features in the present application are not described further to avoid unnecessary repetition.

In the description of the embodiments of the present application, unless otherwise indicated and defined, the term "connected" should be construed broadly, and for example, may be an electrical connection, may be a communication between two elements, may be a direct connection, or may be an indirect connection via an intermediary, and it will be understood by those skilled in the art that the specific meaning of the term may be understood according to the specific circumstances.

It should be noted that, the term "first\second\third" in the embodiments of the present application is merely to distinguish similar objects, and does not represent a specific order for the objects, it is to be understood that "first\second\third" may interchange a specific order or sequence where allowed. It is to be understood that the "first\second\third" distinguishing objects may be interchanged where appropriate such that the embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

Fig. 1 is a schematic sectional view of structural components of a shot test bullet in the present application, and fig. 2 is a schematic perspective view of structural components of a shot test bullet in the present application, as shown in fig. 1 and fig. 2, where the shot test bullet includes: the antenna device comprises a first shell 11, an antenna 12, a missile-borne receiver circuit box 13, a buffer structure 14 and a base assembly 15, wherein the first shell 11 is provided with a first groove-shaped structure 111 and a second groove-shaped structure 112 which are symmetrically arranged and used for accommodating the antenna 12; the antenna 12 is disposed in the first slot structure 111 and the second slot structure 112, and is configured to receive satellite signals; a missile-borne receiver circuit box 13 is arranged in the first shell 11 and connected with the antenna 12 for determining the current position of the test missile according to the satellite signals; the buffer structure 14 is connected with the missile-borne receiver circuit box 13 and is used for reducing the overload influence on the missile-borne receiver circuit box 13 in the process of launching the test missile; the base assembly 15 is disposed at one end of the first housing 11, and has an abutting portion 1521 and a connection portion 1511, the abutting portion 1521 abuts against the missile-borne receiver circuit box 13, the connection portion 1511 is connected with the first housing 11, and a cavity structure 153 is disposed between the abutting portion 1521 and the connection portion 1511.

In this application, the buffer structure 14 includes a first buffer member 141 and a second buffer member 142; the first buffer member 141 is disposed between the missile-borne receiver circuit box 13 and the first housing 11, and is configured to reduce an overload effect on the missile-borne receiver circuit box 13 during a shot-blasting test missile launching process; the second buffer member 142 is disposed between the missile-borne receiver circuit box 13 and the base assembly 15, and is used for reducing an overload influence on the missile-borne receiver circuit box 13 in a shot-blasting test missile launching process and reducing an overload influence on the missile-borne receiver circuit box 13 in a test missile recovery process.

Here, the first buffer 141 and the second buffer 142 may have different buffer properties, and the difference may be represented as: the first buffer member 141 is made of at least one material selected from elastic nylon, polyurethane, and pine blocks, wherein the elastic nylon material satisfies a preset elastic condition; the preset elastic condition can be that the bending modulus is 2500MPa, and the elastic and durable properties are achieved. The second cushioning member 142 is made of polyurethane foam material having a density of 0.25-g-0.32 g/cm3, and the thickness of the second cushioning member 142 may be 1.5-1.8 mm, preferably 0.28g/cm3, and preferably 1.5mm. The second buffer member 142 made of polyurethane foam material has increased yield stress and deformation energy absorption under the condition of high strain rate, and can play a better role in protecting the missile-borne receiver circuit box.

Here, the second buffer 142 may also be made of foamed aluminum of 0.25-0.27 g/cm 3.

In this application, the missile-borne receiver circuit box 13 and the first housing 11 may have a first gap therebetween; the first buffer member 141 may have a first thickness from one side of the missile-borne receiver circuit box 13 to one side of the first housing 11, and the first thickness is greater than the first gap so as to compress the missile-borne receiver circuit box 134, thereby improving the stability of the missile-borne receiver circuit box in the housing.

Here, the first thickness is greater than the first gap by a first threshold value, the first threshold value being between 0.1 and 0.15mm. For example, the first gap is 8.5mm and the first thickness is 8.6mm.

Here, the first thickness is the best barrier property at 8-15mm under the condition that the first thickness is larger than the first gap.

In this application, the base assembly 15 includes a base body 151 and a base cover 152, wherein the base body 151 has the connection portion 1511 and the recess portion 1512; the first end of the base cover 152 is the abutting portion 1521, the first end of the base cover 152 abuts against the missile-borne receiver circuit box 13, and the second end of the base cover 152 is connected with the first end of the base body 151 to form the cavity structure 153; the recess 1512 is disposed opposite to the cavity structure 153, and the diameter of the recess 1512 is greater than or equal to 40mm, so as to reduce the mass of the test bullet per se and the recovery difficulty of the test bullet.

When the diameter of the recess 1512 is 40mm, the diameter of the corresponding test bullet may be 86mm with a tolerance of-0.3 mm to-0.15 mm, as shown in fig. 1. The test bullet can be launched by using an 86mm standard gun.

In this application, the thickness of the connection 1511 is between 15-22mm, preferably 20mm.

In the present application, the connection manner between the connection portion 1511 of the base body 151 and the first housing 11 is not limited, and includes screwing, riveting, and welding. For example, a 12.9-level high-strength screw is used for connecting the shell and the base body, so that the structural strength of the test bullet is ensured, and the phenomenon of breaking and disassembling of the test bullet in the launching process is prevented.

Of course, the base body 151 and the first housing 11 may be integrally formed, so as to further improve the structural strength of the test cartridge.

In this application, the test bullet further includes a protective cover (not shown) covering the first slot structure 111 and the second slot structure 112 for protecting the antenna 12.

The material of the protective cover is not limited, and may be, for example, a rigid material, a glass material, or a carbon fiber material.

In this application, the channel depth parameter of the first channel structure 111 and the second channel structure 112 is greater than the thickness parameter of the antenna 12, for example, the channel depth parameter is greater than the thickness parameter of the antenna by 1-2mm, so as to facilitate the installation of the antenna. The slot inclination angles of the first slot structure 111 and the second slot structure 112 are between 8 degrees and 11 degrees to simulate the installation effect of the antenna on the satellite guidance carts, so that the test result is more real.

In this application, the first slot structure 111 and the second slot structure 112 are further provided with through holes (not shown in the figure) through which wires for the antenna are connected to the circuits on the missile-borne receiver circuit box 13 to form a loop.

Here, the position of the through hole is adapted to the position of the antenna wire.

In this application, the end of the first housing 11 away from the base assembly 15 has a truncated cone-like structure, and the cone angle of the truncated cone-like structure is 45 ° -75 °, preferably 46.86 °. To increase the flight resistance of the test bullet and the recovery resistance of the test bullet.

In this application, the first housing 11 and the base member 15 may be made of a rigid material, such as a stainless steel material. The wall thickness of the first housing 11 is 6-10mm, and the total length from the end of the first housing 11 with the truncated cone-shaped structure to the end of the base body with the concave part can be 178mm. The strength of the test bullet can be guaranteed, the quality of the test bullet can be reduced, and the recovery difficulty of the test bullet is reduced.

The utility model provides a shell is penetrated to the big gun through arranging the shell inside with the bullet receiver circuit box, can avoid the propellant gas that experimental bullet produced in the transmission process to produce the impact damage to the bullet receiver circuit box production when ablating and experimental rebound to the bullet receiver circuit box.

Fig. 3 is a schematic cross-sectional view of a portion of a test bullet loaded into a gun according to the present application, as shown in fig. 3, including a test bullet 10 and a gun body 20, where a first end of the gun body 20 is a special cartridge 201, and a second end is a containing cavity for containing the test bullet 10, where a bottom bullet holder 2021 may be disposed in the containing cavity, for supporting a bullet body and sealing powder gas in the bore, and the bullet holder 2021 may be self-dropped under the action of air resistance after the test bullet flies out of the gun port.

Here, the gun body 20 is a 86mm standard gun. When the diameter of the test bullet 10 is smaller than 86mm, the lateral bullet support 2022 can be further arranged in the accommodating cavity, so that the use requirements of the test bullets with different diameters can be met.

Fig. 4 is a schematic diagram of a structural component section of a test bullet recovery device in the present application, and fig. 5 is a schematic diagram of a structural component section of a test bullet recovery device in the present application, where the test bullet recovery device is used for recovering the shot test bullets shown in fig. 1 and 2; as shown in fig. 4 and 5, the recovery device includes: the second shell 31, the baffle 32, the filling structure 33 and the base 34, wherein the second shell 31 is arranged on the base 34 and is provided with a cavity structure, and the inner diameter parameter of the cavity structure is larger than the outer diameter parameter of the test bullet so as to facilitate the test bullet to pass through; the baffle 32 is movably connected with the second shell 31 through a connecting structure, and is respectively arranged at the first end part, the second end part and the middle part of the second shell 31 so as to divide the cavity structure into at least two cavities, wherein the at least two cavities are coaxially arranged, and the axial direction of the cavities is the same as the emission direction of the test bullet; the filling structures 33 are respectively arranged in the at least two cavities, and the densities of the filling structures in the at least two cavities are different; the base 34 is connected to the second housing 31 and is used for carrying the second housing 31.

Here, the second housing 31 and the base 34 may be made of a rigid material, such as iron, steel, or the like. The cross section of the second housing 31 may be rectangular, circular. When the cross section of the second housing 31 is circular, the diameter of the second housing 31 may be 580mm.

Here, the connection structure between the barrier 32 and the second housing 31 is not limited, and may be, for example, screw-connection, rivet connection, welding, or the like.

Here, the base 34 may be welded by angle steel. The base 34 may have a receiving groove 341 for receiving the second housing 31, and an outer wall of the second housing 31 contacts an inner wall of the receiving groove 341 to enhance the stability of the recycling device.

Here, the receiving groove 341 may be made of a wood board.

Here, the baffle 32 may divide the cavity structure into three cavities, and the filling structures 33 in the three cavities are sequentially a liquid filling structure (such as water), a mixed filling structure of solid and liquid (such as sawn timber, cotton yarn, sand, and water mixture), and a solid filling structure (such as sawn timber and sand) from the emission direction of the test bullet.

Here, the second housing 31 is further provided with a plurality of openings 311, each opening corresponds to one cavity, and is communicated with the corresponding cavity, so as to place the filling structure into the cavity.

As shown in fig. 4, the area of the opening is 0.6m by 0.3m, and the barrier 32 is called a front barrier, a middle barrier, and a rear barrier in this order from the direction of the test bullet firing. Wherein, form first cavity between preceding baffle and the well baffle, form the second cavity between well baffle and the backplate, the filling structure in the first cavity is the mixture of saw wood, cotton yarn, sand, water, and the filling structure in the second cavity is saw wood and/or sand.

Here, the thicknesses of the front baffle and the middle baffle may be 15-20mm, the thickness of the rear baffle may be 3-5 times that of the front baffle or the middle baffle, the distance between the outer side wall of the front baffle and the outer side wall of the rear baffle is about 2m, the distance between the inner side wall of the front baffle and the side wall of the middle baffle close to the front baffle is about 930mm, and the distance between the side wall of the middle baffle close to the rear baffle and the inner side wall of the rear baffle is about 930mm.

Here, the baffle 32 may be made of wood, preferably pine. So that the test bullet can pass through or be embedded, and the recovery efficiency and the integrity of the test bullet can be improved.

The utility model provides a test bullet recovery unit through setting up a plurality of coaxial cavities in test bullet launching direction, and the filling structure of every cavity intussuseption packing different density not only can realize that low damage shooting test bullet retrieves, and is less to test bullet structure and missile-borne receiver impact moreover, can improve the integrality and the rate of recovery of test video tape bullet. In addition, through setting up wooden baffle, can be convenient for pick up experimental bullet, improve experimental bullet's recovery efficiency.

Fig. 6 is a schematic flow chart of an implementation of a method for recovering test cartridges in the present application, where the method is applied to the test cartridge recovery apparatus shown in fig. 4 and 5, and the method includes:

step 601, in response to detecting that the test bullet is completely launched, controlling a middle baffle plate of the test bullet recovery device to pop up the second shell; detecting whether the middle baffle plate is provided with an elastic perforation or not;

step 602, if the middle baffle plate is provided with the bullet hole, controlling a rear baffle plate of the test bullet recovery device to eject the second shell so as to search the test bullet on the rear baffle plate;

step 603, if the middle baffle plate does not have the bullet hole, controlling a front baffle plate of the test bullet recovery device to pop up the second shell so as to search the test bullet on the front baffle plate or search the test bullet in a cavity area close to the front baffle plate;

Through the test bullet recovery method provided by the application, the damage to the test bullet caused by the recovery of the test bullet can be reduced to the greatest extent, and the recovery efficiency of the test bullet can be improved.

Fig. 7 is a second schematic view of a recovery scenario of the test cartridge in the present application, as shown in fig. 7:

firstly, arranging a test bullet recovery device;

here, the distance between the recovery device and the gun is 15-20m, and the separation of the lateral bullet support, the bottom bullet support and the test bullet and the recovery of the test bullet can be realized within the minimum distance;

secondly, arranging a high-speed camera and a background plate, and calibrating relevant parameters of the high-speed camera;

here, the high-speed camera is disposed at one side of the cannon and the recovery device, and is close to the middle position of the cannon and the recovery device. Relevant parameters for calibrating the high-speed camera include, but are not limited to, exposure, sampling frequency, focusing, calibration parameters.

Here, the high-speed camera may also have a protective cover for protecting the high-speed camera from damage during the firing of the test bullet.

And thirdly, loading the mounted test bullet into a gun barrel of the gun, loading propellant powder into a cartridge case of the gun barrel according to the calculated propellant powder, and entering a state to be emitted.

Here, if a bottom holder and a lateral holder are to be installed, the bottom holder and/or the lateral holder are also to be installed in the barrel, depending on the model of the test projectile.

And fourthly, controlling the high-speed camera to start to collect images, and controlling the test bullet to emit towards the recycling device.

Here, in the case of having a sabot, the sabot is separated from the test sabot and the test is ejected toward the recovery device.

Fifthly, when the test bullet is confirmed to successfully enter the recovery device through the image acquired by the high-speed camera, the test bullet is recovered through the recovery device;

and sixthly, taking out the test bullet in the recovery device.

Here, the middle baffle of the recovery device can be firstly extracted, whether the middle baffle is provided with a test bullet hole or not is detected, and if the middle baffle is provided with the test bullet hole, the rear baffle is removed to find the test bullet; if not, the front baffle is removed to find the test bullet.

By the shot test bullet, the test bullet recovery method and the recovery device, the test and recovery of the test bullet can be completed by using a smaller target range, and the recovery integrity and efficiency of the test bullet are greatly improved; moreover, the landing target point of the test bullet is accurate and reliable, and the situation that the test bullet is difficult to recycle due to errors in ballistic calculation in the traditional method is avoided; in addition, the multistage recovery impedance is gradually increased, damage to the test bullet caused by recovery is reduced to the greatest extent, and the whole process from the test bullet emission to the target landing can be collected by the high-speed camera, so that the later analysis and improvement of the test are facilitated.

The above description is merely a specific embodiment of the present application, but the scope of the present application is not limited thereto.

Claims

1. A shot test bullet, the test bullet comprising:

2. The cannon shot of claim 1, wherein the cushioning structure comprises:

3. The cannon-shot test cartridge of claim 2, wherein the first cushioning member and the second cushioning member differ in cushioning properties as:

the first buffer piece is made of at least one material selected from elastic nylon, polyurethane and pine blocks, wherein the elastic nylon material meets the preset elastic condition;

4. The cannon-shot test cartridge of claim 2, wherein the cartridge receiver circuit box has a first gap between the first housing; the first buffer has a first thickness from the missile-borne receiver circuit box side to the first housing side, the first thickness being greater than the first gap.

5. The cannon shot of claim 4, wherein the first thickness is 0.1-0.15mm greater than the first gap.

6. The cannon shot of claim 1, wherein the base assembly comprises:

the base body is provided with the connecting part and the concave part;

7. The cannon-shot test pellet of claim 1, further comprising a protective cover over the first channel structure and the second channel structure for protecting the antenna.

8. The cannon-shot testing cartridge of claim 1, wherein the end of the first housing remote from the base assembly is a frustoconical structure having a cone angle of 45 ° to 75 °.

9. The cannon shot of any one of claims 1 to 8, wherein the first housing and the base assembly are made of a rigid material.

10. A test recoil collector for collecting the shot test bullets according to any one of claims 1 to 9; the recovery device includes:

11. The test recoil mechanism of claim 10, wherein the baffle separates the cavity structure into three cavities, and wherein the filling structures in the three cavities are sequentially a liquid filling structure, a mixed solid and liquid filling structure, and a solid filling structure from the direction of firing of the test cartridge.

12. A method of recovering test cartridges, wherein the method is applied to a test cartridge recovery apparatus as claimed in any one of claims 10 to 11, the method comprising:

if the middle baffle plate is not provided with the bullet perforation, controlling a front baffle plate of the test bullet recovery device to pop up the second shell so as to search the test bullet on the front baffle plate or search the test bullet in a cavity close to the front baffle plate;