Non-lethal kinetic energy projectile impact damage effect evaluation test apparatus and evaluation test method

Abstract

The application discloses a non-lethal kinetic energy projectile striking damage effect evaluation test device and an evaluation test method. The evaluation test device comprises a launching system for launching the non-lethal kinetic energy projectile, a projectile speed detection system for monitoring the launching speed of the non-lethal kinetic energy projectile, a projectile target plate system comprising a rigid target plate, a pressure sensor and a support seat, the pressure sensor being arranged between the rigid target plate and the support seat and being used for monitoring the instantaneous pressure value of the rigid target plate during being hit by the non-lethal kinetic energy projectile, an image acquisition system comprising a high-speed camera arranged at the outer periphery of the rigid target plate, the central axis of the camera lens of the high-speed camera being flush with the target surface of the rigid target plate, and the high-speed camera being used for monitoring the instantaneous peripheral wall contour image of the non-lethal kinetic energy projectile during the process of the non-lethal kinetic energy projectile hitting the rigid target plate, and a data processing system for acquiring the launching speed, the pressure value and the peripheral wall contour image for data processing and evaluating the striking damage effect of the non-lethal kinetic energy projectile.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of non-lethal weapons, and particularly relates to a non-lethal kinetic energy projectile impact damage effect evaluation test device and an evaluation test method. BACKGROUND

[0002] A non-lethal kinetic energy projectile is a kind of police non-lethal projectile which relies on the kinetic energy of a projectile to strike a target, relies on blunt impact or low penetration to injure and pain the target, and thus achieves the purpose of dispersing and subduing. Because the development cost of this kind of ammunition is low, and the striking effect is rapid, it has been equipped and widely used in the police part of various countries. However, permanent damage or even death caused by non-lethal kinetic energy projectiles occurs from time to time in actual combat. Therefore, it has become an urgent problem to be solved in this field to carry out damage evaluation research on non-lethal kinetic energy projectiles.

[0003] Through analysis of damage cases of non-lethal kinetic energy projectiles, the cases leading to death are mainly head damage and skin penetration damage. In the research on head impact damage, the peak impact force is a key indicator for measuring the damage performance; in the research on skin penetration damage, the peak average stress can measure the penetration performance.

[0004] In this regard, researchers at home and abroad have proposed to use corpses, animals, gelatin, red pine target plates, cowhide paper, etc. as targets to evaluate the damage of non-lethal kinetic energy projectiles. The test method based on corpses and animals is easily affected by ethics and material consistency; the test method based on gelatin is easily affected by the preparation process and service life of gelatin; the method of using red pine target plates and cowhide paper is not only easily affected by the consistency of material sources, but also is a qualitative evaluation method.

[0005] Therefore, the application proposes a simple and easy-to-use quantitative test method with good repeatability based on rigid target plates to solve the above problems. SUMMARY

[0006] The application proposes a non-lethal kinetic energy projectile impact damage effect evaluation test device and an evaluation test method to solve the problem of damage evaluation of non-lethal kinetic energy projectiles. Specifically, the following technical solutions are adopted:

[0007] The non-lethal kinetic energy projectile impact damage effect evaluation test device is characterized by comprising:

[0008] A launching system for launching non-lethal kinetic energy projectiles;

[0009] A projectile velocity detection system arranged at a launching port of the launching system for monitoring the launching speed of the non-lethal kinetic energy projectiles launched by the launching system;

[0010] The elastic body target plate system comprises a rigid target plate, a pressure sensor and a support seat, the rigid target plate is fixed on the support seat and arranged opposite to the launching port of the launching system, the pressure sensor is arranged between the rigid target plate and the support seat, and the pressure sensor is used for monitoring the pressure value of the rigid target plate during being hit by the non-lethal kinetic energy bullet launched by the launching system.

[0011] The image acquisition system comprises a high-speed camera arranged on the outer periphery of the rigid target plate, the central axis of the camera lens of the high-speed camera is flush with the target surface of the rigid target plate, and the high-speed camera is used for monitoring the outer profile image of the non-lethal kinetic energy bullet during the process that the non-lethal kinetic energy bullet launched by the launching system hits the rigid target plate.

[0012] The data processing system is communicatively connected with the bullet speed detection system, the elastic body target plate system and the image acquisition system respectively, acquires the launching speed, the pressure value and the outer profile image for data processing, and evaluates the damage effect of the non-lethal kinetic energy bullet.

[0013] As an optional embodiment of the present application, the transverse section of the bullet head of the non-lethal kinetic energy bullet is a circular transverse section, the transverse section is a section along the direction perpendicular to the central axis of the non-lethal kinetic energy bullet, the central axis of the high-speed camera is arranged along the radial direction of the circular transverse section of the bullet head of the non-lethal kinetic energy bullet, the instantaneous diameter value D(t) of the bullet head in contact with the rigid target plate during the process that the non-lethal kinetic energy bullet launched by the launching system hits the rigid target plate is analyzed based on the outer profile image of the non-lethal kinetic energy bullet acquired by the high-speed camera, and the instantaneous acting area S(t) of the non-lethal kinetic energy bullet when hitting the rigid target plate is calculated.

[0014] As an optional embodiment of the present application, the inside of the support seat has a mounting hole, the rigid target plate comprises a target surface part and a connecting part integrally formed by a rigid material, the free end of the connecting part penetrates through the mounting hole and is fixedly connected on the mounting hole of the support seat through a fastener, the pressure sensor is arranged between the support seat and the target surface part, and the detection end surface of the pressure sensor is attached to the target surface part.

[0015] As an optional embodiment of the present application, the elastic body target plate system comprises a pressure acquisition controller in communication connection with the pressure sensor, the image acquisition system comprises an image acquisition controller in communication connection with the high-speed camera, the image acquisition controller and the pressure acquisition controller are arranged at the same acquisition frequency, the image acquisition controller and the pressure acquisition controller are electrically connected with the same trigger switch, the image acquisition controller and the pressure acquisition controller are controlled to be synchronously started through the trigger switch, and data acquisition is performed at the same acquisition frequency.

[0016] As an optional embodiment of the present application, the launching system comprises a launching controller, which is electrically connected with the trigger switch, and the launching controller triggers the closing of the trigger switch while issuing a non-lethal kinetic energy projectile launching instruction, and the image acquisition controller and the pressure acquisition controller are synchronously started.

[0017] As an optional embodiment of the present application, the projectile speed detection system comprises a first photoelectric detection element and a second photoelectric detection element, which are arranged at the launching port of the launching system, and a speed detection controller, which is electrically connected with the first photoelectric detection element and the second photoelectric detection element, and the speed detection controller is electrically connected with the trigger switch, and the speed detection controller triggers the closing of the trigger switch while receiving the detection signal of the first photoelectric detection element or the second photoelectric detection element, and the image acquisition controller and the pressure acquisition controller are synchronously started.

[0018] Alternatively, the projectile speed detection system comprises a first electromagnetic detection element and a second electromagnetic detection element, which are arranged at the launching port of the launching system, and a speed detection controller, which is electrically connected with the first electromagnetic detection element and the second electromagnetic detection element, and the speed detection controller is electrically connected with the trigger switch, and the speed detection controller triggers the closing of the trigger switch while receiving the detection signal of the first electromagnetic detection element or the second electromagnetic detection element, and the image acquisition controller and the pressure acquisition controller are synchronously started.

[0019] The present application also provides a non-lethal kinetic energy projectile damage effect evaluation test method, which uses the non-lethal kinetic energy projectile damage effect evaluation test device.

[0020] A launching system for launching non-lethal kinetic energy projectiles.

[0021] A projectile speed detection system arranged at the launching port of the launching system for monitoring the launching speed of the non-lethal kinetic energy projectiles launched by the launching system.

[0022] A projectile target plate system comprising a rigid target plate, a pressure sensor and a support seat, wherein the rigid target plate is fixed on the support seat and arranged opposite to the launching port of the launching system, and the pressure sensor is arranged between the rigid target plate and the support seat, and the pressure sensor is used for monitoring the instantaneous pressure value of the rigid target plate during the process of being hit by the non-lethal kinetic energy projectiles launched by the launching system.

[0023] An image acquisition system comprises a high-speed camera arranged at the periphery of the rigid target plate, the center axis of the camera lens of the high-speed camera is flush with the target surface of the rigid target plate, and the high-speed camera is used for monitoring the outer profile image of the non-lethal kinetic energy projectile during the process that the non-lethal kinetic energy projectile fired by the launching system hits the rigid target plate;

[0024] A data processing system is in communication connection with the projectile speed detection system, the projectile target plate system and the image acquisition system respectively;

[0025] The evaluation test method comprises:

[0026] Based on the outer profile image of the non-lethal kinetic energy projectile collected by the high-speed camera, the instantaneous diameter value D(t) of the bullet head contacting the rigid target plate during the process that the non-lethal kinetic energy projectile fired by the launching system hits the rigid target plate is analyzed, and the instantaneous action area S(t) of the non-lethal kinetic energy projectile hitting the rigid target plate is calculated;

[0027] Based on the instantaneous pressure value of the rigid target plate during the process that the rigid target plate is hit by the non-lethal kinetic energy projectile fired by the launching system, the instantaneous action force F(t) of the non-lethal kinetic energy projectile hitting the rigid target plate is determined;

[0028] The instantaneous average contact stress σ(t) of the non-lethal kinetic energy projectile hitting the rigid target plate is calculated

[0029]

[0030] According to the launching speed detected by the projectile speed detection system and the instantaneous average contact stress σ(t), the damage effect of the non-lethal kinetic energy projectile is evaluated.

[0031] As an optional embodiment of the present application, in the evaluation test method of the damage effect of the non-lethal kinetic energy projectile, the analysis of the instantaneous diameter value D(t) of the bullet head contacting the rigid target plate during the process that the non-lethal kinetic energy projectile fired by the launching system hits the rigid target plate based on the outer profile image of the bullet head collected by the high-speed camera and the calculation of the instantaneous action area S(t) of the non-lethal kinetic energy projectile hitting the rigid target plate comprise:

[0032] The image acquisition system controls the high-speed camera to collect the outer profile images (P1, t1), (P2, t2), …, (Pn, tn) of each time during the process that the non-lethal kinetic energy projectile hits the rigid target plate according to the preset image acquisition frequency;

[0033] extracting the bullet profile in the outer profile image of the peripheral wall, and obtaining the diameters (D1, t1), (D2, t2), …, (Dn, tn) of the circular transverse section of the bullet actually contacting the rigid target plate at each time during the process of the non-lethal kinetic energy bullet hitting the rigid target plate according to the pixels occupied by the bullet profile;

[0034] calculating the instantaneous acting area S(t) of the non-lethal kinetic energy bullet when hitting the rigid target plate.

[0035] As an optional embodiment of the present application, in the evaluation test method of the damage effect of the non-lethal kinetic energy bullet, the instantaneous force F(t) of the non-lethal kinetic energy bullet when hitting the rigid target plate is determined based on the instantaneous pressure value of the rigid target plate monitored by the pressure sensor during the process of the non-lethal kinetic energy bullet hitting the rigid target plate launched by the launching system, and the method comprises the following steps:

[0036] controlling the pressure sensor and the high-speed camera to start synchronously, the pressure acquisition frequency of the pressure sensor is consistent with the image acquisition frequency of the high-speed camera, and the pressure values (F1, t1), (F2, t2), …, (Fm, tm) at each time during the process of the non-lethal kinetic energy bullet hitting the rigid target plate are acquired;

[0037] selecting the pressure values at the same time as the time parameters of the obtained instantaneous diameters D(t) as the instantaneous force F(t) of the non-lethal kinetic energy bullet when hitting the rigid target plate.

[0038] Compared with the prior art, the present application has the following beneficial effects:

[0039] The non-lethal kinetic energy bullet damage effect evaluation test device provided by the present application obtains the corresponding instantaneous impact force through the pressure sensor, obtains the contact area of the non-lethal kinetic energy bullet with the rigid target plate during the impact process through the high-speed photography of the high-speed camera, and further obtains the instantaneous average stress, so as to realize the test and evaluation of the impact damage and skin penetration damage of the non-lethal kinetic energy bullet.

[0040] Therefore, the non-lethal kinetic energy bullet damage effect evaluation test device has the following technical effects:

[0041] 1. The rigid target plate is fixed on the support seat and can be disassembled and replaced, and the rigid target plate is rigid and not prone to damage, and can be repeatedly used for experiments.

[0042] 2. The pressure sensor is installed between the rigid target plate and the support seat, can transmit impact pressure data in real time, that is, instantaneous impact pressure, and can be replaced and repeatedly used for experiments.

[0043] 3. The non-lethal kinetic energy projectile's instantaneous contact cross section diameter with the rigid target plate is measured by contour processing the contour image of the outer wall collected by the high-speed camera, and the instantaneous contact cross section area is obtained through software processing.

[0044] 4. The data processing system can formula-process the instantaneous impact pressure and the projectile instantaneous contact cross section diameter, so as to obtain the instantaneous impact stress, and determine the striking effect of the non-lethal kinetic energy projectile and whether the instantaneous impact stress exceeds the skin penetration stress through the instantaneous impact stress curve.

[0045] 5. The test device can test the instantaneous impact force through the pressure sensor, and is used for evaluating the damage of the human head; and can also test the average impact stress, and is used for evaluating the human damage.

[0046] 6. The test device can record all test parameters, and provides a basis for subsequent bullet and gun design. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 System principle of the non-lethal kinetic energy projectile striking damage effect evaluation test device Figure 1 ;

[0048] Figure 2 System principle of the non-lethal kinetic energy projectile striking damage effect evaluation test device Figure 2 ;

[0049] Figure 3 Whole appearance state diagram of the non-lethal kinetic energy projectile when not hitting the rigid target plate

[0050] Figure 4 Whole appearance state diagram of the non-lethal kinetic energy projectile when hitting the rigid target plate

[0051] Figure 5 Sectional view of the projectile body target plate system

[0052] Figure 6 Front view of the projectile body target plate system DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.

[0054] Therefore, the following detailed description of the embodiments of the application is not intended to limit the scope of the application as claimed, but merely represents some embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0055] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0056] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0057] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is used, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0058] Referring to Figure 1 The non-lethal kinetic energy projectile damage effect evaluation test device of the embodiment shown comprises:

[0059] A launching system 1 for launching a non-lethal kinetic energy projectile 2;

[0060] A projectile body speed detection system 4 arranged at the launching port of the launching system 1 for monitoring the launching speed of the non-lethal kinetic energy projectile 2 launched by the launching system 1;

[0061] A projectile body target plate system 3 comprising a rigid target plate 31, a pressure sensor 32 and a support seat 33, wherein the rigid target plate 31 is fixed on the support seat 33 and arranged opposite to the launching port of the launching system 1, and the pressure sensor 32 is arranged between the rigid target plate 31 and the support seat 33, and the pressure sensor 32 is used to monitor the instantaneous pressure value of the rigid target plate 31 during being hit by the non-lethal kinetic energy projectile 2 launched by the launching system 1;

[0062] An image acquisition system comprises a high-speed camera 37 arranged at the periphery of the rigid target plate, the central axis of the camera lens of the high-speed camera 37 is flush with the target surface of the rigid target plate 31, and the high-speed camera 37 is used for monitoring the image of the peripheral wall contour of the non-lethal kinetic energy projectile 2 during the process of the non-lethal kinetic energy projectile 2 fired by the launching system 1 hitting the rigid target plate 31.

[0063] A data processing system 39 is in communication connection with the projectile speed detection system 4, the projectile target plate system 3 and the high-speed camera 37 respectively, acquires the launching speed, the pressure value and the peripheral wall contour image for data processing, and evaluates the damage effect of the non-lethal kinetic energy projectile.

[0064] The non-lethal kinetic energy projectile damage effect evaluation test device provided in the embodiment obtains the corresponding instantaneous impact force through the pressure sensor 32, obtains the contact area of the non-lethal kinetic energy projectile 2 with the rigid target plate 31 during the impact process through the high-speed photography of the high-speed camera 37, and further obtains the instantaneous average stress, so as to realize the test and evaluation of the impact damage and skin penetration damage of the non-lethal kinetic energy projectile 2.

[0065] Therefore, the non-lethal kinetic energy projectile damage effect evaluation test device of the embodiment has the following advantages:

[0066] 1. The rigid target plate 31 is fixed on the support seat and can be disassembled and replaced, and the rigid target plate 31 is rigid and not easy to be damaged, and can be repeatedly used for experiments.

[0067] 2. The pressure sensor 32 is installed between the rigid target plate 31 and the support seat 33, can transmit the impact pressure data in real time, that is, the instantaneous impact pressure, and can be replaced and used for repeated experiments.

[0068] 3. The instantaneous contact cross-sectional diameter of the non-lethal kinetic energy projectile 2 with the rigid target plate 31 is measured through the contour processing of the peripheral wall contour image collected by the high-speed camera 37, and the instantaneous contact cross-sectional area is obtained through software processing.

[0069] 4. The data processing system 39 can perform formula processing on the instantaneous impact pressure and the instantaneous contact cross-sectional diameter of the projectile, so as to obtain the instantaneous impact stress, determine the impact effect of the non-lethal kinetic energy projectile through the instantaneous impact stress curve, and determine whether the instantaneous impact stress exceeds the skin penetration stress.

[0070] 5. The test device can test the instantaneous impact force through the pressure sensor 32, and is used for evaluating the damage of the human head; and can test the average impact stress, and is used for evaluating the human damage.

[0071] 6. The test device can record all test parameters, and provides a basis for subsequent bullet and gun design.

[0072] Further, in order to obtain the size of the contact surface between the non-lethal kinetic energy projectile 2 and the rigid target plate 31 during the impact process by high-speed photography of the high-speed camera 37, the head 22 of the non-lethal kinetic energy projectile 2 has a circular transverse cross section, the transverse cross section is a cross section perpendicular to the central axis of the non-lethal kinetic energy projectile 2, the central axis of the high-speed camera is arranged in the radial direction of the circular transverse cross section of the head 22 of the non-lethal kinetic energy projectile 2, and based on the image of the outer contour of the peripheral wall of the non-lethal kinetic energy projectile 2 collected by the high-speed camera 37, the instantaneous diameter D(t) of the head 22 in contact with the rigid target plate 31 during the process that the non-lethal kinetic energy projectile 2 launched by the launching system 1 hits the rigid target plate 31 is analyzed to calculate the acting area S(t) of the non-lethal kinetic energy projectile 2 when hitting the rigid target plate 31.

[0073] The high-speed camera 37 of the embodiment is arranged in the radial direction of the circular transverse cross section of the head of the non-lethal kinetic energy projectile, and does not interfere with the movement path of the non-lethal kinetic energy projectile 2, so that the high-speed camera 37 can obtain dynamic images during the entire process that the non-lethal kinetic energy projectile 2 hits the rigid target plate 31. However, the existing image collection after the target is hit by the projectile body generally obtains the front image of the hit image, and the high-speed camera needs to be arranged along the movement path of the projectile body. The launching system 1 or the target will block the high-speed camera to collect dynamic images during the entire process that the projectile body hits the target, and the high-speed camera can only collect images after the projectile body hits the target.

[0074] As can be seen from the above, the non-lethal kinetic energy projectile impact damage effect evaluation test device of the embodiment places the camera lens axis and the outer surface of the rigid target plate 31 in the same plane, and focuses the camera lens on the flight axis of the projectile body. The arrangement of the high-speed camera can obtain dynamic images during the entire process that the non-lethal kinetic energy projectile 2 hits the rigid target plate 31, and can realize monitoring of the cross section change during the entire process that the non-lethal kinetic energy projectile 2 hits the rigid target plate 31.

[0075] The non-lethal kinetic energy projectile impact damage effect evaluation test device of the embodiment can realize dynamic pressure change during the entire process that the non-lethal kinetic energy projectile 2 hits the rigid target plate 31. Specifically, as shown in Figure 1 , Figure 5 and Figure 6 , the inside of the support seat 33 has a mounting hole, the rigid target plate 31 includes a target surface part 31a and a connecting part 31b integrally formed of a rigid material, the free end of the connecting part 31b penetrates through the mounting hole and is fixedly connected to the mounting hole of the support seat 33 through a fastener 35, the pressure sensor 32 is arranged between the support seat 33 and the target surface part 31a, and the detection end surface of the pressure sensor 32 is attached to the target surface part 31a.

[0076] Specifically, in this embodiment, the fastener 35 is a fastening nut, and a washer 34 is provided between the fastening nut and the connecting part 39. Different sizes and specifications of rigid target plates 31 can be fixedly connected by different washer 34.

[0077] The non-lethal kinetic energy projectile impact damage evaluation test device of this embodiment requires synchronous processing of the detection data from the pressure sensor 32 and the high-speed camera 37 to achieve dynamic stress monitoring throughout the entire process of the non-lethal kinetic energy projectile 2 hitting the rigid target plate 31. This ensures that the pressure value detected by the pressure sensor 32 is synchronized with the image acquired by the high-speed camera 37, allowing for the calculation of the impact stress at the corresponding moment. Therefore, see... Figure 2 As shown, the projectile target system 3 in this embodiment includes a pressure acquisition controller 51 communicatively connected to the pressure sensor 32, and an image acquisition system including an image acquisition controller 52 communicatively connected to the high-speed camera 37. The image acquisition controller 52 and the pressure acquisition controller 51 are set to the same acquisition frequency. The image acquisition controller 52 and the pressure acquisition controller 51 are electrically connected to the same trigger switch 53, which controls the synchronous start-up of the image acquisition controller 52 and the pressure acquisition controller 51, enabling data acquisition at the same acquisition frequency. In this embodiment, the image acquisition controller 52 and the pressure acquisition controller 51 are triggered by the same trigger switch 53, and their frequency settings are consistent to ensure that the points acquired are consistent. For example, a frequency setting of 30kHz means acquiring 30,000 points and 30,000 images.

[0078] As an optional implementation of this embodiment, the launching system 1 includes a launching controller, which is electrically connected to the trigger switch 53. Simultaneously with the launching controller issuing a non-lethal kinetic energy projectile launch command, the trigger switch 53 is triggered to close, and the image acquisition controller 52 and pressure acquisition controller 51 are simultaneously activated. In this embodiment, the image acquisition controller 52 and pressure acquisition controller 51 are simultaneously activated to acquire data at the same time as the launching system 1 launches the non-lethal kinetic energy projectile.

[0079] As an optional embodiment of the present embodiment, the projectile speed detection system 4 comprises a first photoelectric detection element 41 and a second photoelectric detection element 42 arranged at the launching port of the launching system 1, and a speed detection controller electrically connected with the first photoelectric detection element 41 and the second photoelectric detection element 42. The speed detection controller is electrically connected with the trigger switch 53. The speed detection controller triggers the trigger switch 53 to close at the same time when the detection signal of the first photoelectric detection element 41 or the second photoelectric detection element 42 is received, and the image acquisition controller 52 and the pressure acquisition controller 51 are synchronously started.

[0080] Alternatively, the projectile speed detection system 4 comprises a first electromagnetic detection element and a second electromagnetic detection element arranged at the launching port of the launching system, and a speed detection controller electrically connected with the first electromagnetic detection element and the second electromagnetic detection element. The speed detection controller is electrically connected with the trigger switch 53. The speed detection controller triggers the trigger switch 53 to close at the same time when the detection signal of the first electromagnetic detection element or the second electromagnetic detection element is received, and the image acquisition controller 52 and the pressure acquisition controller 51 are synchronously started. The launching speed is calculated according to the time t and the distance s of the non-lethal kinetic projectile 2 passing through the first electromagnetic detection element and the second electromagnetic detection element in turn.

[0081] Referring to Figure 1 The data processing system 39 of the present embodiment is connected with the pressure sensor 32 through a first communication cable 36, connected with the high-speed camera 37 through a second communication cable 38, connected with the first photoelectric detection element 41 through a third communication cable 43, and connected with the second photoelectric detection element 42 through a fourth communication cable 44.

[0082] The launching system 1 of the present embodiment is composed of a power propulsion device 11 and a launching tube 12. The power propulsion device includes, but is not limited to, air compression propulsion, electromagnetic propulsion, or gunpowder propulsion, etc.

[0083] The non-lethal kinetic projectile 2 refers to various deformable non-lethal projectiles, such as rubber bullets, rubber bullets, cloth bag bullets, sponge bullets, etc. When the projectile contacts the target, the head does not break but can be deformed, and the target is driven away by transmitting energy to the target to produce pain, achieving the purpose of driving away the target. The non-lethal kinetic projectile can be composed of a soft bullet head 22 and a hard bullet body 21, or can be composed of an elastic material as a whole, such as a rubber stick bullet. Referring to Figure 3The overall appearance state diagram of the non-lethal kinetic energy projectile 2 when it does not hit the rigid target plate 31 is shown, see Figure 4 The overall appearance state diagram of the non-lethal kinetic energy projectile 2 when it hits the rigid target plate 31 is shown, wherein the compression deformation occurs when the bullet head 22 hits the rigid target plate 31.

[0084] The embodiment also provides an evaluation test method for the damage effect of the non-lethal kinetic energy projectile, which uses the evaluation test device for the damage effect of the non-lethal kinetic energy projectile, and the evaluation test device comprises:

[0085] A launching system for launching the non-lethal kinetic energy projectile;

[0086] A projectile speed detection system arranged at the launching port of the launching system and used for monitoring the launching speed of the non-lethal kinetic energy projectile launched by the launching system;

[0087] A projectile target plate system comprising a rigid target plate, a pressure sensor and a support seat, wherein the rigid target plate is fixed on the support seat and arranged opposite to the launching port of the launching system, and the pressure sensor is arranged between the rigid target plate and the support seat and used for monitoring the pressure value of the rigid target plate during the process of being hit by the non-lethal kinetic energy projectile launched by the launching system;

[0088] An image acquisition system comprising a high-speed camera arranged at the outer periphery of the rigid target plate, wherein the central axis of the camera lens of the high-speed camera is flush with the target surface of the rigid target plate, and the camera lens is used for monitoring the outer profile image of the non-lethal kinetic energy projectile during the process of hitting the rigid target plate by the non-lethal kinetic energy projectile launched by the launching system;

[0089] A data processing system in communication connection with the projectile speed detection system, the projectile target plate system and the image acquisition system respectively.

[0090] The evaluation test method comprises:

[0091] Based on the outer profile image of the non-lethal kinetic energy projectile acquired by the high-speed camera, the instantaneous diameter value D(t) of the bullet head contacting the rigid target plate during the process of hitting the rigid target plate by the non-lethal kinetic energy projectile launched by the launching system is analyzed to calculate the instantaneous action area S(t) of the non-lethal kinetic energy projectile hitting the rigid target plate;

[0092] Based on the pressure value of the rigid target plate during the process of being hit by the non-lethal kinetic energy projectile launched by the launching system monitored by the pressure sensor, the instantaneous action force F(t) of the non-lethal kinetic energy projectile hitting the rigid target plate is determined;

[0093] The instantaneous average contact stress of the non-lethal kinetic energy projectile hitting the rigid target plate is calculated

[0094]

[0095] According to the launch speed detected by the projectile speed detection system and the instantaneous average contact stress S(t), the damage effect of the non-lethal kinetic energy projectile is evaluated.

[0096] Specifically, in the evaluation test method for the damage effect of the non-lethal kinetic energy projectile, the instantaneous diameter D(t) of the projectile head in contact with the rigid target plate during the process of the non-lethal kinetic energy projectile launched by the launch system hitting the rigid target plate is analyzed based on the peripheral wall contour image of the projectile head collected by the high-speed camera, and the instantaneous acting area S(t) of the non-lethal kinetic energy projectile hitting the rigid target plate is calculated, which includes:

[0097] The image collection system controls the high-speed camera to collect the peripheral wall contour images (P1, t1), (P2, t2), …, (Pn, tn) at each time during the process of the non-lethal kinetic energy projectile hitting the rigid target plate at a preset image collection frequency.

[0098] The projectile head contour in the peripheral wall contour image is extracted, and the diameters (D1, t1), (D2, t2), …, (Dn, tn) of the circular transverse section of the projectile head actually in contact with the rigid target plate at each time during the process of the non-lethal kinetic energy projectile hitting the rigid target plate are calculated according to the pixels occupied by the projectile head contour.

[0099] The acting area S(t) of the non-lethal kinetic energy projectile hitting the rigid target plate is calculated.

[0100] Specifically, in the evaluation test method for the damage effect of the non-lethal kinetic energy projectile, the instantaneous force F(t) of the non-lethal kinetic energy projectile hitting the rigid target plate is determined based on the instantaneous pressure value of the rigid target plate during the process of the non-lethal kinetic energy projectile launched by the launch system hitting the rigid target plate monitored by the pressure sensor, which includes:

[0101] The pressure sensor and the high-speed camera are controlled to start synchronously, the pressure collection frequency of the pressure sensor is consistent with the image collection frequency of the high-speed camera, and the pressure values (F1, t1), (F2, t2), …, (Fm, tm) at each time during the process of the non-lethal kinetic energy projectile hitting the rigid target plate are collected.

[0102] According to the time parameters of the obtained instantaneous diameter D(t), the pressure values at the same time are selected as the instantaneous force F(t) of the non-lethal kinetic energy projectile hitting the rigid target plate.

[0103] The process of the evaluation test method of the non-lethal kinetic energy projectile damage effect evaluation test device includes:

[0104] The power propulsion device 11 of the launching system 1 provides kinetic energy for the non-lethal kinetic energy projectile 2, which can hit the rigid target plate 31 of the projectile target plate system 3 along the horizontal axis direction under the guidance of the launching tube 12. Since the rigid target plate 31 is fastened on the support seat 33 through the fastening nut 34 and the gasket 34, the pressure sensor 32 is installed between the support seat 33 and the rigid target plate 31. The pressure sensor 32 is tightly clamped after being equipped with the support seat 33 and the rigid wall (rigid target plate) 31.

[0105] After the non-lethal kinetic energy projectile 2 contacts the rigid target plate 31, the rigid target plate 31 is impacted and vibrated, extruding the pressure sensor 32. The pressure sensor 32 continuously transmits the impact force to the data processing system 39 in real time through the wire. The processing software in the data processing system 39 filters the data to remove vibration interference and obtains the instantaneous impact force at each moment.

[0106] At the same time, since the non-lethal kinetic energy projectile head 22 deforms after hitting the rigid target plate 31, the high-speed camera 37 captures the impact process at high speed. The data is also transmitted to the data processing system 39. The data processing system 39 processes the image, extracts the projectile contour, and calculates the actual contact cross-sectional diameter D of the non-lethal kinetic energy projectile and the rigid target plate 31 at each moment according to the pixels.

[0107] Then according to the calculation formula

[0108]

[0109] Wherein, F(t) is the instantaneous impact force, unit N; D(t) is the instantaneous contact surface diameter of the projectile and the rigid target plate, unit mm. The instantaneous average contact stress is calculated.

[0110] The instantaneous average stress is compared with the penetration stress limit (such as 10 MPa) in real time. Only when all the values are lower than the limit, the test can meet the non-lethal requirement. The corresponding parameters such as the projectile launching speed and the projectile parameters are recorded, which provide a basis for the subsequent gun and projectile design.

[0111] The embodiment also provides a computer readable storage medium, which stores a computer executable program. When the computer executable program is executed, the evaluation test method of the non-lethal kinetic energy projectile impact damage effect evaluation test device is realized.

[0112] The computer readable storage medium of this embodiment can include a data signal carried in a baseband or as a part of a carrier wave propagating through the transmission medium, in which a readable program code is borne. Such a propagated data signal can take various forms, including but not limited to electro-magnetic signal, optical signal or any suitable combination of the above. The computer readable storage medium can also be any readable medium other than the storage medium, which can send, propagate or transmit the program for use by or in connection with an instruction execution system, apparatus or device. The program code contained in the computer readable storage medium can be transmitted by any suitable medium, including but not limited to wireless, wired, optical cable, RF, etc. or any suitable combination of the above.

[0113] This embodiment also provides an electronic device including a processor and a memory for storing a computer executable program, when the computer program is executed by the processor, the processor executes the non-lethal kinetic energy projectile damage effect evaluation test device to perform the evaluation test method.

[0114] The electronic device is in the form of a general computing device. The processor can be one or multiple and work cooperatively. The present application also does not exclude distributed processing, i.e. the processor can be dispersed in different physical devices. The electronic device of the present application is not limited to a single physical entity, but can also be the sum of multiple physical devices.

[0115] The memory stores a computer executable program, which is usually machine readable code. The computer readable program can be executed by the processor to enable the electronic device to perform the method of the present application, or at least part of the steps in the method.

[0116] The memory includes volatile memory, such as random access memory (RAM) and / or cache memory, and / or non-volatile memory, such as read only memory (ROM).

[0117] It should be understood that the electronic device of the present application can also include elements or components not shown in the above examples. For example, some electronic devices also include display units such as display screens, and some electronic devices also include human-computer interaction elements such as buttons and keyboards. As long as the electronic device can execute the computer readable program in the memory to realize the method of the present application or at least part of the steps in the method, it can be considered as an electronic device covered by the present application.

[0118] Through the above description of the embodiments, those skilled in the art can easily understand that the present application can be implemented by hardware capable of executing a specific computer program, such as a system of the present application and an electronic processing unit, a server, a client, a mobile phone, a control unit, a processor, etc. contained in the system. The present application can also be implemented by computer software for executing the method of the present application, such as control software executed by a microprocessor, an electronic control unit, a client, a server, etc. However, it should be noted that the computer software for executing the method of the present application is not limited to being executed by one or a specific hardware entity, but can also be implemented in a distributed manner without specific hardware. For computer software, the software product can be stored in a computer-readable storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.), or can be distributed on a network, as long as it can make electronic equipment execute the method according to the present application.

[0119] The above embodiments are only used to illustrate the present application and not to limit the technical solutions described in the present application. Although the present application has been described in detail with reference to the above embodiments, the present application is not limited to the above specific embodiments, and any modification or equivalent replacement of the present application; all technical solutions and improvements that do not deviate from the spirit and scope of the present application are encompassed in the scope of the claims of the present application.

Claims

1. A testing device for evaluating the damage effect of non-lethal kinetic energy projectile strikes, characterized in that, include: Launching system for launching non-lethal kinetic energy projectiles; The projectile velocity detection system is installed at the launch port of the launch system to monitor the launch velocity of the non-lethal kinetic energy projectile launched by the launch system. The projectile target plate system includes a rigid target plate, a pressure sensor, and a support base. The rigid target plate is fixed on the support base and is positioned opposite to the launch port of the launch system. The pressure sensor is disposed between the rigid target plate and the support base and is used to monitor the instantaneous pressure value experienced by the rigid target plate during the process of being hit by a non-lethal kinetic energy projectile launched by the launch system. The image acquisition system includes a high-speed camera disposed on the outer periphery of the rigid target plate. The central axis of the camera lens of the high-speed camera is flush with the target surface of the rigid target plate. The high-speed camera is used to monitor the instantaneous peripheral contour image of the non-lethal kinetic energy projectile during the process of the non-lethal kinetic energy projectile launched by the launching system hitting the rigid target plate. The data processing system communicates with the projectile velocity detection system, the projectile target plate system, and the image acquisition system to acquire the launch velocity, pressure value, and peripheral wall outline image for data processing and to evaluate the damage effect of the non-lethal kinetic energy projectile.

2. The non-lethal kinetic energy projectile impact damage evaluation and testing device according to claim 1, characterized in that, The warhead of the non-lethal kinetic energy projectile has a circular transverse cross-section, which is a cross-section perpendicular to the central axis of the non-lethal kinetic energy projectile. The central axis of the high-speed camera is set along the radial direction of the circular transverse cross-section of the warhead of the non-lethal kinetic energy projectile. Based on the peripheral wall outline image of the non-lethal kinetic energy projectile acquired by the high-speed camera, the instantaneous diameter value D(t) of the warhead contacting the rigid target plate during the process of the non-lethal kinetic energy projectile launched by the launching system hitting the rigid target plate is analyzed, and the instantaneous area of ​​action S(t) when the non-lethal kinetic energy projectile hits the rigid target plate is calculated.

3. The non-lethal kinetic energy projectile strike damage evaluation and testing device according to claim 1, characterized in that, The support base has an internal mounting hole. The rigid target plate includes a target surface integrally formed from a rigid material and a connecting part. The free end of the connecting part passes through the mounting hole and is fixedly connected to the mounting hole of the support base by a fastener. The pressure sensor is disposed between the support base and the target surface, and the detection end face of the pressure sensor is in contact with the target surface.

4. The non-lethal kinetic energy projectile strike damage evaluation and testing device according to claim 1, characterized in that, The projectile target plate system includes a pressure acquisition controller that is communicatively connected to the pressure sensor, and the image acquisition system includes an image acquisition controller that is communicatively connected to the high-speed camera. The image acquisition controller and the pressure acquisition controller are set to the same acquisition frequency. The image acquisition controller and the pressure acquisition controller are electrically connected to the same trigger switch. The trigger switch controls the image acquisition controller and the pressure acquisition controller to start synchronously and acquire data at the same acquisition frequency.

5. The non-lethal kinetic energy projectile strike damage evaluation and testing device according to claim 4, characterized in that, The launch system includes a launch controller, which is electrically connected to the trigger switch. When the launch controller issues a non-lethal kinetic energy projectile launch command, it triggers the trigger switch to close, and the image acquisition controller and pressure acquisition controller are started synchronously.

6. The non-lethal kinetic energy projectile strike damage evaluation and testing device according to claim 4, characterized in that, The projectile velocity detection system includes a first photoelectric detection element and a second photoelectric detection element spaced apart at the launch port of the launch system, and a velocity detection controller electrically connected to the first photoelectric detection element and the second photoelectric detection element. The velocity detection controller is electrically connected to the trigger switch. When the velocity detection controller receives a detection signal from the first photoelectric detection element or the second photoelectric detection element, it triggers the trigger switch to close. The image acquisition controller and the pressure acquisition controller are started synchronously. Alternatively, the projectile velocity detection system includes a first electromagnetic detection element and a second electromagnetic detection element spaced apart at the launch port of the launch system, and a velocity detection controller electrically connected to the first electromagnetic detection element and the second electromagnetic detection element. The velocity detection controller is electrically connected to the trigger switch. When the velocity detection controller receives a detection signal from the first electromagnetic detection element or the second electromagnetic detection element, it triggers the trigger switch to close, and the image acquisition controller and the pressure acquisition controller are started synchronously.

7. A method for evaluating the damage effect of non-lethal kinetic energy projectile strikes, characterized in that, The non-lethal kinetic energy projectile impact damage evaluation and testing device as described in any one of claims 1-6, wherein the evaluation and testing device comprises: Launching system for launching non-lethal kinetic energy projectiles; The projectile velocity detection system is installed at the launch port of the launch system to monitor the launch velocity of the non-lethal kinetic energy projectile launched by the launch system. The projectile target plate system includes a rigid target plate, a pressure sensor, and a support base. The rigid target plate is fixed on the support base and is positioned opposite to the launch port of the launch system. The pressure sensor is disposed between the rigid target plate and the support base and is used to monitor the pressure value experienced by the rigid target plate during the process of being hit by a non-lethal kinetic energy projectile launched by the launch system. The image acquisition system includes a high-speed camera disposed on the outer periphery of the rigid target plate. The central axis of the camera lens of the high-speed camera is flush with the target surface of the rigid target plate. The high-speed camera is used to monitor the peripheral contour image of the non-lethal kinetic energy projectile during the process of the non-lethal kinetic energy projectile launched by the launching system hitting the rigid target plate. The data processing system is connected to the projectile velocity detection system, the projectile target plate system, and the image acquisition system respectively. The evaluation and testing methods include: Based on the instantaneous peripheral contour image of the non-lethal kinetic energy projectile captured by the high-speed camera, the instantaneous diameter value D(t) of the projectile contacting the rigid target plate during the process of the non-lethal kinetic energy projectile launched by the launching system hitting the rigid target plate is analyzed, and the effective area S(t) when the non-lethal kinetic energy projectile hits the rigid target plate is calculated. Based on the pressure value monitored by the pressure sensor during the process of being hit by the non-lethal kinetic energy projectile launched by the launching system, the instantaneous force F(t) when the non-lethal kinetic energy projectile hits the rigid target plate is determined. Calculate the instantaneous average contact stress when a non-lethal kinetic energy projectile strikes the rigid target plate. The impact damage effect of a non-lethal kinetic energy projectile is evaluated based on the launch velocity detected by the projectile velocity detection system and the instantaneous average contact stress σ(t).

8. The method for evaluating the damage effect of a non-lethal kinetic energy projectile strike according to claim 7, characterized in that, The analysis of the projectile's peripheral contour image captured by the high-speed camera yields the instantaneous diameter D(t) of the non-lethal kinetic energy projectile impacting the rigid target plate. The calculation of the effective area S(t) when the non-lethal kinetic energy projectile impacts the rigid target plate includes: The image acquisition system controls a high-speed camera to acquire images of the peripheral wall outline (P1, t1), (P2, t2), ..., (Pn, tn) at various moments during the process of a non-lethal kinetic energy projectile hitting the rigid target plate, according to a preset image acquisition frequency. Extract the projectile outline from the peripheral wall outline image, and calculate the diameters (D1, t1), (D2, t2), ..., (Dn, tn) of the circular transverse section where the projectile actually contacts the rigid target plate at each moment during the non-lethal kinetic energy projectile's impact on the rigid target plate, based on the pixels occupied by the projectile outline. Calculate the instantaneous area of ​​impact S(t) when a non-lethal kinetic energy projectile strikes the rigid target plate.

9. The method for evaluating the damage effect of a non-lethal kinetic energy projectile strike according to claim 8, characterized in that, The determination of the instantaneous force F(t) when the non-lethal kinetic energy projectile hits the rigid target plate, based on the pressure value monitored by the pressure sensor, during the impact of the non-lethal kinetic energy projectile on the rigid target plate, includes: The pressure sensor is controlled to start synchronously with the high-speed camera. The pressure acquisition frequency of the pressure sensor is consistent with the image acquisition frequency of the high-speed camera. The pressure values ​​(F1, t1), (F2, t2), ..., (Fm, tm) at various moments during the non-lethal kinetic energy projectile hitting the rigid target plate are collected. Based on the obtained instantaneous diameter D(t) time parameter, select the pressure value at the same time as the instantaneous force F(t) when the non-lethal kinetic energy projectile hits the rigid target plate.

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