Reverse overload test device and method for fuze

Abstract

The invention belongs to the technical field of impact dynamics experiments, and discloses a fuse reverse overload test device and method, and the device comprises an impact generation device, a test projectile body, and a target body device. The impact generating device adopts an air cannon; the air cannon is used for launching a test projectile body, so that the test projectile body impacts the target body device at a preset out-of-chamber speed; the test projectile body is arranged in a gun barrel of the air cannon, and the test projectile body comprises a projectile body, a to-be-detected fuse and an acceleration sensor; the fuse to be detected and the acceleration sensor are symmetrically arranged at the tail part of the bomb body; wherein the acceleration sensor is used for collecting acceleration data of a fuse to be detected; the target body device is located on an exit path of the test projectile body; the air cannon is adopted as an impact generating device to launch the test projectile body with the fuze to be detected and impact the target body device, based on the principle of penetration overload, an impact response spectrum is obtained through the transient process that the test projectile body impacts the target body, and the accuracy and repeatability of test data are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of impact dynamics experiments, and in particular relates to a fuze reverse overload test device and method. Background Art

[0002] The fuze is the final execution unit of the weapon system to exert its terminal effect. Its performance is related to whether the ammunition can be fully exerted, and directly determines the success or failure of the weapon system's confrontation with the target. With the integration and intelligent development of modern fuzes, during the launching process, due to the impact of high G-value overload acceleration, the key insurance mechanism inside it is very easy to suffer structural damage, which in turn affects the reliability of the product function.

[0003] For high-overload shock tests on fuzes, a high-magnitude, wide-pulse-width shock response spectrum is generally used to simulate the actual shock environment. Among them, the simulation of complex oscillation-type shock environments is generally based on the principle of equivalent damage, that is, within a specified time course, if the shock response spectrum generated by the fuze product under simulated shock excitation is equivalent to the shock response spectrum generated in the actual shock environment, then the fuze product is considered to have undergone the shock environment assessment.

[0004] At present, in order to obtain the impact response spectrum of the fuze, a drop hammer test, a Hopkinson bar impact test or a cannon impact test is usually used, that is, a cannon, a hammer, and a Hopkinson bar are used as impact generating devices to carry out a fuze penetration overload test to obtain the impact response spectrum; however, the above methods are unstable in the change of the impact force, and it is difficult to achieve an ideal control state for the impact frequency and waveform, which easily leads to the non-repeatability and inaccuracy of the fuze penetration overload test; specifically, although the cannon can generate a higher instantaneous acceleration, it is difficult to accurately control the intensity, duration and application direction of the impact; the hammer device often generates a lower acceleration peak value and cannot meet the high G value requirement; the Hopkinson impact test usually requires the use of large mechanical equipment to provide sufficient energy, making the overload simulation less precise and difficult to fine-tune. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a fuze reverse overload test device and method to solve the technical problems that the prior method is prone to non-repeatability and inaccuracy in the fuze reverse overload test due to unstable changes in impact force and difficulty in achieving an ideal control state of impact frequency and waveform.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a fuze reverse overload test device, comprising an impact generating device, a test projectile and a target device; The impact generating device uses an air cannon; the air cannon is used to launch the test projectile so that the test projectile impacts the target device at a preset muzzle velocity. The test projectile is arranged in the barrel of the air cannon. The test projectile includes a projectile body, a fuse to be detected, and an acceleration sensor; the fuse to be detected and the acceleration sensor are symmetrically arranged at the tail of the projectile body; wherein, the acceleration sensor is used to collect the acceleration data of the fuse to be detected. The target device is located on the exit path of the test projectile.

[0007] Furthermore, the air cannon includes a high-pressure gas chamber and a barrel. The barrel is horizontally installed at the outlet of the high-pressure gas chamber, and the test projectile is arranged in the barrel; wherein, the high-pressure gas chamber is used to release preset high-pressure gas to drive the test projectile in the barrel to be launched at a preset muzzle velocity.

[0008] Furthermore, the air cannon further includes an inflation valve and a pressure gauge, and both the inflation valve and the pressure gauge are installed on the high-pressure gas chamber. One end of the inflation valve is used to be connected to an external air source, and the other end of the inflation valve is connected to the inflation port of the high-pressure gas chamber; the pressure gauge is used to monitor the gas pressure in the high-pressure gas chamber.

[0009] Furthermore, the test projectile further includes a warhead and a projectile base; the warhead is installed at the head of the projectile body, and the projectile base is installed at the tail end of the projectile body.

[0010] Furthermore, a first mounting slot hole and a second mounting slot hole are symmetrically arranged on the end face of the tail of the projectile body; the fuse to be detected is installed in the first mounting slot hole through a first fixing bolt, and the acceleration sensor is installed in the second mounting slot hole through a second fixing bolt.

[0011] Furthermore, the fuse to be detected is fixed at the front end of the first fixing bolt through a preset constraint method and is arranged close to one end of the bottom of the first mounting slot hole; the acceleration sensor is fixed at the front end of the second fixing bolt through a preset constraint method and is arranged close to one end of the bottom of the second mounting slot hole.

[0012] Furthermore, the preset constraint method includes threaded connection, riveting or bonding.

[0013] Furthermore, the target device includes a target plate body; the target plate body is vertically arranged at the exit target position of the test projectile, and a plurality of preset through holes are evenly arranged at the center of the target plate body; wherein, the preset through holes penetrate through the projectile-facing surface and the back projectile surface of the target plate body.

[0014] Further, the acceleration sensor is a storage - type acceleration sensor.

[0015] The present invention also provides a method for testing the reverse overload of a fuse, using the fuse reverse overload test device described above; The method for testing the reverse overload of the fuse includes: Placing a test projectile with the fuse to be detected and an acceleration sensor in the barrel of an air cannon; Firing the test projectile using the air cannon and causing the test projectile to impact the target device at a preset muzzle velocity; wherein, the acceleration data of the fuse to be detected is collected using the acceleration sensor; Obtaining the shock response spectrum of the fuse to be detected according to the acceleration data of the fuse to be detected.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The fuse reverse overload test device provided by the present invention uses an air cannon as an impact generating device to launch a test projectile with the fuse to be detected and impact the target device. Based on the principle of penetration overload, the shock response spectrum is obtained by using the transient process of the test projectile impacting the target, significantly improving the accuracy and repeatability of test data, and providing a more stable and reliable test platform for the product performance evaluation of the fuse; among them, the fuse to be detected and the acceleration sensor are symmetrically installed at the tail of the projectile body, which can precisely control the intensity, duration, and application direction of the impact, ensuring the repeatability and accuracy of the fuse reverse overload test; specifically, by using the air cannon to launch the test projectile, the intensity, duration, and method of the impact can be precisely regulated by controlling the gas pressure of the air cannon, which can provide a more stable and reliable impact force, meet the requirements of accurately simulating different impact scenarios under high G - value conditions, and ensure the repeatability and accuracy of the test; secondly, installing the fuse to be detected at the tail of the projectile body to simulate the actual working position of the fuse for impact testing can truly simulate the force - bearing situation of the fuse in the working state, achieve the effect of in - situ testing, and ensure the practical applicability and reference value of the test results; in addition, the acceleration sensor and the fuse to be detected are symmetrically arranged to achieve precise detection of the acceleration of the fuse to be detected, ensure that the acceleration waveform received by the fuse meets the design requirements, thereby greatly improving the accuracy and repeatability of the experiment, reducing the influence of external disturbances, and providing a more stable and reliable experimental environment.

[0017] Further, a target plate body with a preset through - hole is adopted. The structural design of the preset through - hole can achieve the effect of adjusting the pulse width and peak value, providing a basis for generating a more detailed and accurate shock response spectrum, capable of precisely simulating complex overload scenarios, especially providing more abundant and high - precision data for evaluating the penetration performance of the fuse; at the same time, it can significantly enhance the dynamic response ability of the device, making the test results more accurate and comprehensive. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the fuze reverse overload test device provided by the present invention; Figure 2 It is a front view of the fuze reverse overload test device provided by the present invention; Figure 3 It is a top view of the fuze reverse overload test device provided by the present invention; Figure 4 Is Figure 1 An enlarged schematic diagram of part A in; Figure 5 It is a structure schematic diagram of the test projectile in the present invention.

[0020] Wherein, 1 is an impact generating device, 2 is a test projectile, and 3 is a target device; 11 is a high-pressure gas chamber, 12 is a gun barrel, 13 is an inflation valve, 14 is a pressure gauge, 15 is a support platform, 16 is an air cannon fixing platform; 21 is a warhead, 22 is a projectile body, 23 is a fuze to be detected, 24 is a fuze mounting platform, 25 is a first fixing bolt, 26 is an acceleration sensor, 27 is a sensor mounting platform, 28 is a second fixing bolt, 29 is a projectile base; 221 is a first mounting slot hole, 222 is a second mounting slot hole; 31 is a target plate body, 32 is a target plate fixing bracket, 33 is a target plate fixing platform; 311 is a preset through hole. Detailed Embodiments

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present application clearer and more understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0022] Some technical terms related to the present invention are described as follows: Penetration effect: The destructive effect that penetrators such as projectiles, fragments, and metal jets with a certain speed rely on their own kinetic energy to penetrate or perforate the target.

[0023] Fuse: Also known as a detonator, it is an explosive device installed on shells, bombs, landmines, etc. It is a control device that uses target information and environmental information to detonate or ignite the warhead charge of ammunition under predetermined conditions.

[0024] Shock Response Spectrum: It is a graphical tool for describing the response of a structure under specific shock or dynamic loads. By relating the dynamic responses of the structure at different frequencies to its vibration characteristics, it is used to evaluate the performance of the structure under unsteady loading conditions. In the shock response spectrum, the abscissa generally represents time, and the ordinate usually represents a physical quantity of the structure response, commonly the maximum acceleration. The response quantity represents the dynamic behavior of the structure when encountering external shocks, thus helping with design optimization and structural safety assessment.

[0025] Pulse Width: Usually expressed as half a cycle or one cycle of shock acceleration. In the reverse overload test of the fuse, the pulse width of the acceleration shock response spectrum is usually required to be in the millisecond range.

[0026] As shown in the Figures 1-5 accompanying figure, the present invention provides a reverse overload test device for a fuse, including a shock generating device 1, a test projectile 2, and a target device 3. The shock generating device 1 uses an air cannon, and the air cannon is used to launch the test projectile 2 so that the test projectile 2 impacts the target device 3 at a preset muzzle velocity. The target device 3 is located on the exit path of the test projectile 2.

[0027] The air cannon includes a high-pressure gas chamber 11, a barrel 12, an inflation valve 13, a pressure gauge 14, a support platform 15, and an air cannon fixing platform 16. The air cannon fixing platform 16 is set on the ground or the test bench surface, and the top surface of the air cannon fixing platform 16 is horizontally arranged. The support platform 15 is set on the top surface of the air cannon fixing platform 16, and the high-pressure gas chamber 11 is set on the support platform 15. The barrel 12 is horizontally installed at the outlet of the high-pressure start 11, and the test projectile 2 is set in the barrel 12. Among them, the high-pressure start 11 is used to release preset high-pressure gas to drive the test projectile 2 in the barrel 12 to be launched at a preset muzzle velocity. The top of the high-pressure gas chamber 11 is provided with an inflation port and a pressure detection hole. The inflation valve 13 is installed at the inflation port, and the pressure gauge 14 is installed at the pressure detection hole. Among them, one end of the inflation valve 13 is connected to an external air source, and the other end of the inflation valve 13 is connected to the inflation port. The pressure gauge 14 is used to monitor the gas pressure in the high-pressure gas chamber 11.

[0028] The test projectile 2 includes a warhead 21, a projectile body 22, a fuse to be detected 23, a fuse mounting platform 24, a first fixing bolt 25, an acceleration sensor 26, a sensor mounting platform 27, a second fixing bolt 28, and a projectile base 29.

[0029] The warhead 21 is installed at the head of the projectile body 22, and the projectile base 29 is installed at the tail end of the projectile body 22; wherein, the warhead 21 serves as the impact part; the fuse to be detected 23 and the acceleration sensor 26 are symmetrically arranged at the tail of the projectile body 22 and are both located between the projectile body 22 and the projectile base 29; wherein, the acceleration sensor 26 is used to collect the acceleration data of the fuse to be detected; preferably, the acceleration sensor 26 is a memory type acceleration sensor.

[0030] Specifically, the projectile body 22 is of a cylindrical structure, and a first installation slot hole 221 and a second installation slot opening 222 are symmetrically arranged on the tail end face of the projectile body 22; wherein, the first installation slot hole 221 serves as the installation space for the fuse to be detected 23, and the second installation slot hole 222 serves as the installation space for the acceleration sensor 26; the first installation slot hole 221 and the second installation slot hole 222 are symmetrically arranged on both sides of the central axis of the projectile body 22, and both the first installation slot hole 221 and the second installation slot hole 222 are of a cylindrical hole structure; the central axis of the cylindrical hole structure is parallel to the central axis of the projectile body 22, one end of the cylindrical hole structure penetrates through the tail end face of the projectile body 22, and the other end of the cylindrical hole structure extends towards the head direction of the projectile body 22; wherein, internal threads are arranged on the inner wall of the cylindrical hole structure, and the internal threads are used for mating and connecting with the external threads of the first fixing bolt 25 or the second fixing bolt 28.

[0031] The fuse to be detected 23 is installed in the first installation slot hole 221 through the first fixing bolt 25; specifically, the first fixing bolt 25 is fitted and installed in the first installation slot hole 221, and the fuse installation platform 24 is installed at the front end of the first fixing bolt 25; wherein, the fuse installation platform 24 is arranged near one end of the bottom of the first installation slot hole 221; the fuse to be detected 23 is fixed at the front end of the fuse installation platform 24 through a preset constraint method and is arranged near one end of the bottom of the first installation slot hole 221; preferably, the preset constraint method is threaded connection, riveting or bonding.

[0032] It should be noted that the fuse to be detected 23 is fixed at the front end of the first fixing bolt 25 by a preset constraint method and is arranged near the bottom end of the first mounting slot hole 221, so as to directly place the fuse to be detected 23 at the actual working position for impact testing, which can truly reproduce the force condition of the fuse in the working state; through the in-situ testing of the fuse to be detected 23, the installation method, structural design and dynamic behavior of the fuse can be comprehensively considered, ensuring the actual applicability and reference value of the test results. By obtaining test data closer to the actual application, the performance evaluation of the fuse is more accurate, which helps to improve the reliability of the fuse in complex environments.

[0033] The acceleration sensor 26 is installed in the second mounting slot hole 222 through the second fixing bolt 28; specifically, the second fixing bolt 28 is fitted and installed in the second mounting slot hole 222, and the sensor mounting platform 27 is installed at the front end of the second fixing bolt 28; wherein, the sensor mounting platform 27 is arranged near the bottom end of the second mounting slot hole 222; the acceleration sensor 26 is fixed at the front end of the acceleration mounting platform 27 by a preset constraint method and is arranged near the bottom end of the second mounting slot hole 222; wherein, the constraint method for the acceleration sensor 26 is the same as that for the fuse to be detected 23.

[0034] It should be noted that by arranging the acceleration sensor 26 at the symmetric position of the fuse to be detected 23, the acceleration of the fuse to be detected 23 can be accurately monitored. The impact force can be adjusted in real time based on the monitoring data of the acceleration sensor 26 to ensure that the acceleration waveform received by the fuse to be detected 23 meets the design requirements, greatly improving the accuracy and repeatability of the experiment, reducing the influence of external disturbances, providing a more stable and reliable experimental environment, and ensuring the control accuracy of each variable during the impact test.

[0035] The target device 3 includes a target plate body 31, a target plate fixing bracket 32 and a target plate fixing platform 33; the target plate fixing platform 33 is arranged on the ground or the test bench surface, and the top surface of the target plate fixing platform 33 is horizontally arranged; wherein, the height of the top surface of the target plate fixing platform 33 is adapted to the height of the top surface of the air cannon fixing platform 16; the target plate body 31 is vertically arranged on the top surface of the target plate fixing platform 33, and the bullet-facing surface of the target plate body 31 is perpendicular to the exit path of the test projectile 2 and is placed at the exit target position of the test projectile 2; preferably, the center of the target plate body 31 coincides with the exit path of the test projectile 2, that is, the exit path of the test projectile 2 vertically penetrates the center of the target plate body 31.

[0036] The target plate body 31 adopts a target plate structure made of a preset material, and a plurality of preset through holes 311 are evenly arranged at the center of the target plate body 31; wherein, the preset through holes 311 are distributed in a preset arrangement manner in a preset central area of the target plate body 31, and the preset through holes 311 penetrate through the bullet-facing surface and the back bullet-facing surface of the target plate body 31; specifically, one end of the preset through hole 311 communicates with the bullet-facing surface of the target plate body 31, and the other end of the preset through hole 311 communicates with the back bullet-facing surface of the target plate body 31.

[0037] It should be noted that by evenly arranging a plurality of preset through holes 311 at the center of the target plate body 31 to form a perforated target plate structure, the aperture and hole pitch of the preset through holes 311 are adjusted according to the test requirements, so that the acceleration pulse spectrum of the test projectile 2 meets the test requirements of a preset high G value and wide pulse width, and then a more detailed and accurate shock response spectrum is generated to enhance the shock response ability of the target body and meet the real simulation of complex overload scenarios; specifically, by arranging the preset through holes 311 at the center of the target plate body 31, the shock response is precisely controlled by using the preset through holes 311 to ensure the generation of a shock response spectrum with a high peak value and wide pulse width, greatly enhancing the shock response ability of the target body; secondly, by optimizing the aperture and hole pitch of the preset through holes 311 and the material design of the target plate body 31, the pulse width and peak value can be adjusted to generate a more detailed and accurate shock response spectrum; through the design of the perforated target plate structure, more complex overload scenarios can be simulated, especially for evaluating the penetration performance of fuzes, providing richer and higher-precision data, while significantly improving the dynamic response ability of the experimental device, and enabling the evaluation of fuze performance to be more accurate and comprehensive.

[0038] The target plate fixing bracket 32 is arranged on the back bullet-facing surface of the target plate body 31 and is used to vertically fix the target plate body 31 on the target plate fixing platform 33; specifically, the target plate fixing bracket 32 includes two triangular brackets, and the two triangular brackets are symmetrically arranged at both ends of the back bullet-facing surface of the target plate body 31; wherein, the triangular bracket is a right triangle structure, one of the right sides of the triangular bracket is connected to the top surface of the target plate fixing platform 33, and the other right side of the triangular bracket is connected to the back bullet-facing surface of the target plate body 31.

[0039] Usage process: For the fuze reverse overload test device of the present invention, when in use, it is as follows: According to the test requirements, determine the specification parameters of the test projectile; wherein, according to the design parameters of the fuze 23 to be detected, cylindrical hole structures are symmetrically opened on the end face of the tail of the projectile body 22 to serve as the installation space for the fuze 23 to be detected and the acceleration sensor 26, and internal threads are reserved on the inner wall of the cylindrical hole structure.

[0040] Since different restraint methods have a significant impact on the mechanical properties of the fuze, it is necessary to determine the restraint method of the fuze 23 to be detected according to the position and installation method of the fuze 23 to be detected in actual use; the fuze 23 to be detected is installed on the fuze mounting platform 24 according to the determined restraint method, and the acceleration sensor 26 is installed on the sensor mounting platform 27 in the same restraint method; it should be noted that the fuze mounting platform 24 has been pre-installed on the end face of the first fixing bolt 25, and the sensor mounting platform 27 has been pre-installed on the end face of the second fixing bolt 28.

[0041] The first fixing bolt 25 with the fuze 23 to be detected is installed in the first installation slot 221 of the projectile body 22, and the second fixing bolt 28 with the acceleration sensor 26 is installed in the second installation slot 222 of the projectile body 22, so that the fuze 23 to be detected and the acceleration sensor 26 are symmetrically arranged at the tail of the projectile body 22, and then the acceleration state of the fuze 23 to be detected is monitored in real time by using the acceleration sensor 26; then the projectile base 29 is installed, and the installation of the test projectile body 2 is completed.

[0042] According to the design parameters of the test projectile 2, the chamber pressure of the air cannon is determined; according to the determined chamber pressure, the high-pressure air chamber 11 is inflated using the inflation valve 13; during the inflation process, the reading of the barometer 14 is observed to make the pressure in the high-pressure air chamber 11 reach the designed value to ensure that the test projectile 2 impacts the target device 3 at a preset exit velocity.

[0043] The target plate body 31 is designed based on the penetration theory; specifically, the acceleration pulse spectrum is made to meet the test requirements of high G value and wide pulse width by adjusting the aperture and hole spacing parameters of the preset through holes 311 on the target plate body 31; after the design of the target plate body 31 is completed, the target plate body 31 is fixed on the target plate fixing platform 33 to complete the assembly of the target device 3.

[0044] The fuze reverse overload test device described in the present invention uses an impact generating device to launch a test projectile with a fuze to be tested and impact a target plate structure with a hole. Compared with the process of obtaining the impact response spectrum through direct launching processes such as traditional drop hammer test, Hopkinson bar impact test, air gun impact test, and artillery impact test, the present invention is based on the principle of penetration overload and uses the transient process of the test projectile impacting the target body to obtain the impact response spectrum, providing a more stable and reliable test platform for the product performance evaluation of the fuze, and can significantly improve the accuracy and repeatability of the test data.

[0045] In the present invention, an air cannon is used as the impact generating device. By precisely controlling the air pressure of the air cannon, precise control of the impact intensity, duration, and direction is achieved, thereby precisely controlling the impact force and acceleration, meeting the requirement of precisely simulating various impact scenarios in a high-G environment, and thus improving the accuracy and reliability of fuze performance evaluation. Among them, since the air cannon can adjust the parameters of the applied force, the test can be accurate to the fine overload state required by the fuze, thereby improving the repeatability and accuracy of the experiment.

[0046] In the present invention, the fuze to be detected is installed at the tail of the projectile body to simulate the actual working position of the fuze for impact testing to form the original test effect. Conducting impact testing in the real working environment of the fuze can comprehensively reproduce the force-bearing situation of the fuze in actual use, significantly improve the practical applicability of fuze performance evaluation, and reduce the deviation between the test environment and actual application. The acceleration sensor is symmetrically arranged with the fuze to be detected, effectively avoiding the fluctuations and instabilities in the traditional acceleration control system, being able to adjust the impact force and acceleration waveforms in real time, ensuring that each impact meets the design requirements, and thus greatly improving the control accuracy of the test process.

[0047] In the present invention, a target plate body with preset through holes is adopted to meet the simulation test requirements of complex overload scenarios, enhance the accuracy and comprehensiveness of fuze performance evaluation, provide a guarantee for generating a more refined and accurate impact response spectrum, thus meeting the requirements of high G value and wide pulse width, and effectively improving the impact response ability of the target body.

[0048] The present invention also provides a method for reverse overload test of a fuze, including the following steps: Step 1: Place the test projectile body 2 with the fuze 23 to be detected and the acceleration sensor 26 in the barrel of the air cannon. Specifically, the first fixing bolt 25 with the fuze 23 to be detected is fitted and installed in the first mounting slot hole 221 of the projectile body 22, and the second fixing bolt 28 with the acceleration sensor 26 is fitted and installed in the second mounting slot hole 222 of the projectile body 22, so that the fuze 23 to be detected and the acceleration sensor 26 are symmetrically arranged at the tail of the projectile body 22.

[0049] Step 2: Use the air cannon to launch the test projectile body 2, and make the test projectile body 2 impact the target device 3 at a preset muzzle velocity. Among them, the acceleration data of the fuze 23 to be detected is collected by the acceleration sensor 26. Specifically, according to the design parameters of the test projectile body 2, determine the chamber pressure of the air cannon. According to the determined chamber pressure, start to inflate the high-pressure gas chamber 11 using the inflation valve 13. During the inflation process, observe the reading of the pressure gauge 14 to make the pressure in the high-pressure gas chamber 11 reach the design value. Then, use the air cannon to launch the test projectile body 2.

[0050] Step 3: Record the test data and observe whether the fuse 23 to be detected is damaged by overloading; obtain the shock response spectrum of the fuse 23 to be detected according to the acceleration data of the fuse 23 to be detected. Among them, in the shock response spectrum of the fuse 23 to be detected, the abscissa represents time, and the ordinate represents the acceleration data of the fuse 23 to be detected.

[0051] For the fuse reverse overloading test device and method of the present invention, by precisely controlling the shock intensity, duration, and direction, various shock scenarios can be accurately simulated in a high G-value environment, significantly improving the accuracy and repeatability of experimental data, thereby providing a more stable and reliable test platform for fuse performance evaluation; adopting the in-situ testing method enables the fuse to be tested under shock in its actual working environment, capable of comprehensively reproducing the force-bearing situation of the fuse in actual use; different from the traditional testing method that can only simulate external impact forces, the present invention ensures that the test results are closer to the actual application environment, improving the reliability evaluation of the fuse; through the simulation of the real environment, the evaluation deviation caused by the inconsistency between the experimental environment and the actual application can be reduced, enhancing the prediction ability of the fuse's performance under complex working conditions.

[0052] In the present invention, the acceleration sensor is symmetrically arranged with the fuse to be detected, enabling real-time adjustment of the impact force and acceleration waveform based on the monitoring data of the acceleration sensor, ensuring that the impact received by the fuse meets the design requirements, thereby greatly improving the control accuracy of the experiment; at the same time, the influence of external disturbances can be reduced, enhancing the reliability of the test data; secondly, the use of a perforated target plate structure design instead of the traditional solid target can generate a more detailed and accurate shock response spectrum, enhancing the shock response ability of the target and being able to simulate more complex overloading scenarios; at the same time, it can provide more abundant experimental data for the evaluation of the fuse's penetration performance, improving the accuracy and comprehensiveness of the fuse performance evaluation.

[0053] The test device of the present invention can ensure the reliability of experimental data, the feasibility of experimental operations, and the economy of experimental costs; the present invention can meet the comprehensive simulation of the interaction of multiple variables in a high G-value environment, effectively making up for the limitations of multi-condition testing that are difficult to achieve in the prior art, and providing more comprehensive and accurate experimental data for the penetration behavior of the fuse in a complex dynamic environment.

[0054] The above embodiments are merely one of the implementation manners capable of realizing the technical solution of the present invention. The scope of protection required by the present invention is not limited only by this embodiment, but also includes any changes, substitutions, and other implementation manners that are easily conceivable by any person skilled in the art within the technical scope disclosed by the present invention.

Claims

1. A fuze reverse overload test device, characterized in that, It includes an impact generating device (1), a test projectile (2) and a target device (3); The impact generating device (1) uses an air cannon; the air cannon is used to launch the test projectile (2) so that the test projectile (2) impacts the target device (3) at a preset muzzle velocity; The test projectile (2) is arranged in the barrel of the air cannon. The test projectile (2) includes a projectile body (22), a fuse to be detected (23) and an acceleration sensor (26); the fuse to be detected (23) and the acceleration sensor (26) are symmetrically arranged at the tail of the projectile body (22); wherein, the acceleration sensor (26) is used to collect the acceleration data of the fuse to be detected (23); The target device (3) is located on the exit path of the test projectile (2).

2. The reverse overload test device for a fuse according to claim 1, characterized in that, The air cannon includes a high-pressure air chamber (11) and a barrel (12); The barrel (12) is horizontally installed at the outlet of the high-pressure air chamber (11), and the test projectile (2) is arranged in the barrel (12); wherein, the high-pressure air chamber (11) is used to release preset high-pressure gas to drive the test projectile (2) in the barrel (12) to be launched at a preset muzzle velocity.

3. The reverse overload test device for a fuse according to claim 2, characterized in that The air cannon further includes an inflation valve (13) and a pressure gauge (14), and both the inflation valve (13) and the pressure gauge (14) are installed on the high-pressure air chamber (11); One end of the inflation valve (13) is used to be connected to an external air source, and the other end of the inflation valve (13) is connected to the inflation port of the high-pressure air chamber (11); the pressure gauge (14) is used to monitor the gas pressure in the high-pressure air chamber (11).

4. The reverse overload test device for a fuse according to claim 1, wherein, The test projectile (2) further includes a warhead (21) and a projectile base (29); the warhead (21) is installed at the head of the projectile body (22), and the projectile base (29) is installed at the tail end of the projectile body (22).

5. The reverse overload test device for a fuse according to claim 1, characterized in that, Symmetrically arranged on the tail end face of the projectile body (22) are a first mounting slot hole (221) and a second mounting slot hole (222); the fuse to be detected (23) is installed in the first mounting slot hole (221) through a first fixing bolt (25), and the acceleration sensor (26) is installed in the second mounting slot hole (222) through a second fixing bolt (28).

6. The reverse overload test device for a fuse according to claim 5, wherein The fuse to be detected (23) is fixed to the front end of the first fixing bolt (25) by a preset constraint method and is arranged close to the bottom end of the first mounting slot hole (221); the acceleration sensor (26) is fixed to the front end of the second fixing bolt (26) by a preset constraint method and is arranged close to the bottom end of the second mounting slot hole (222).

7. The reverse overloading test device for a fuse according to claim 6, characterized in that, The preset constraint methods include threaded connection, riveting or bonding.

8. The reverse overload test device for a fuse according to claim 1, wherein, The target device (3) includes a target plate body (31); the target plate body (31) is vertically arranged at the exit target position of the test projectile (2), and a plurality of preset through holes (311) are evenly arranged at the center of the target plate body (31); wherein, the preset through holes (311) penetrate through the bullet-facing surface and the back bullet-facing surface of the target plate body (31).

9. The reverse overloading test device for a fuse according to claim 1, wherein The acceleration sensor (26) is a storage-type acceleration sensor.

10. A method for reverse overload test of a fuse, characterized in that, Use the fuze reverse overload test device according to any one of claims 1-9; The fuze reverse overload test method includes: Place the test projectile (2) with the fuze to be detected (23) and the acceleration sensor (26) in the barrel of the air cannon; Use the air cannon to launch the test projectile (2) and make the test projectile (2) impact the target device (3) at a preset muzzle velocity; wherein, use the acceleration sensor (26) to collect the acceleration data of the fuze to be detected (23); Obtain the shock response spectrum of the fuze to be detected (23) according to the acceleration data of the fuze to be detected (23).

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