A system and method for testing the bullet penetration resistance of steel plates based on skin effect

Abstract

A system and method for testing the anti-bullet penetration performance of steel plates based on skin effect, which relates to the technical field of automobile protective performance testing, and solves the problems of low test accuracy and low safety. The system includes a ballistic gun, a longitudinal slide rail, a transverse slide rail, a transverse stepping motor, a longitudinal stepping motor, a single-chip microcomputer, a thin steel plate skin, a steel plate bracket, a protective steel plate, a strain gauge and a controller; the ballistic gun is provided with a laser sight and a trigger, and the laser sight is electrically connected to the single-chip microcomputer; the trigger is provided with an electromagnetic valve electrically connected to the single-chip microcomputer; the longitudinal slide rail, the transverse stepping motor and the longitudinal stepping motor are arranged on the transverse slide rail; the steel plate bracket is used to fix the thin steel plate skin and the protective steel plate in parallel at a specific interval; the strain gauge is installed on the side of the protective steel plate away from the thin steel plate skin, and the strain gauge is electrically connected to the controller. The method applies the above system. The present invention can be applied to the protective performance test of automobile steel plates, and has high safety and reliability.

Description

Technical Field

[0001] The invention relates to the technical field of automobile protective performance testing, and in particular to an automatic testing technology for steel plate bullet resistance performance based on skin effect. Background Art

[0002] In order to protect people in the vehicle from being attacked by bullets and other weapons, the use of high-strength or ultra-high-strength steel plates as the main body protection material is still the main design scheme for protective vehicles with special usage scenarios.

[0003] According to domestic and foreign case investigations, when a bullet attacks a vehicle, the angle of incidence of the bullet into the vehicle body is often not 0°, depending on the shooting angle and standing position of the shooter. Since the outer surface of the vehicle body is usually covered with a thin steel plate, when the bullet is incident at a certain angle, the angle may deflect during the flight and penetration of the skin, thereby affecting its ability to penetrate and damage the protective steel plate. The above situation is called the "skin effect". Therefore, in order to ensure the safety of protection and reasonably design the size of the vehicle body protection parts, it is necessary to evaluate the protective performance of the steel plate under the skin effect.

[0004] On the other hand, evaluating the anti-bullet penetration performance usually requires manual operation, with professional operators shooting at the target plate. Due to differences in the operators' levels, there are usually certain errors in the shooting points, resulting in low accuracy of the test results. In addition, when shooting at close range, the rebound of the bullet may cause unpredictable personal injury to the test personnel. Summary of the invention

[0005] In order to solve the problems of low accuracy and low safety of existing testing methods, the present invention proposes a system and method for testing the bullet penetration resistance of steel plates based on skin effect.

[0006] The technical solution of the present invention is as follows:

[0007] A steel plate anti-bullet penetration performance test system based on skin effect, comprising a ballistic gun, a longitudinal slide rail, a transverse slide rail, a transverse stepping motor, a longitudinal stepping motor, a single chip microcomputer, a thin steel plate skin, a steel plate bracket, a protective steel plate, a strain gauge and a controller;

[0008] The ballistic gun is provided with a laser sight and a trigger, the laser sight is electrically connected to the single-chip microcomputer through a wiring harness, and is used to identify the coordinates of the target point; the trigger is provided with a solenoid valve, and the solenoid valve is electrically connected to the single-chip microcomputer through a wiring harness, and is used to control the trigger to realize the firing of the ballistic gun;

[0009] The longitudinal slide rail, the transverse stepping motor and the longitudinal stepping motor are arranged on the transverse slide rail and are electrically connected to the single chip microcomputer, and are used to control the ballistic gun to move in the transverse slide rail and the longitudinal slide rail;

[0010] The steel plate bracket is used to fix the thin steel plate skin and the protective steel plate in parallel at a specific distance; the strain gauge is installed on the side of the protective steel plate away from the thin steel plate skin, and the strain gauge is electrically connected to the controller to feedback displacement data after being hit.

[0011] Preferably, the distance between the thin steel plate skin and the protective steel plate is 10 mm to 15 mm.

[0012] A method for testing the bullet penetration resistance of a steel plate based on skin effect, using the system as described above, specifically comprises the following steps:

[0013] Step 1: Mark several target points on the missile-facing surface of the thin steel plate skin;

[0014] Step 2, move the steel plate support to a specific distance between the gun muzzle and the thin steel plate skin;

[0015] Step 3: Tilt the steel plate bracket so that the muzzle direction and the thin steel plate skin are at a specific incident angle;

[0016] Step 4: Load several rounds of ammunition into the ballistic gun, and the test personnel evacuate to a safe location;

[0017] Step 5, sending instructions to the horizontal stepping motor and the vertical stepping motor to drive the ballistic gun to move in the horizontal slide rail and the vertical slide rail, thereby driving the laser sight to move;

[0018] Step 6: The laser sight automatically scans the area of ​​the thin steel plate skin facing the bullet while the ballistic gun moves. When the target point is scanned, the coordinate value is automatically recorded. The scanning ends after the target point is identified.

[0019] Step 7: The program controls the lateral stepping motor and the longitudinal stepping motor to drive the ballistic gun to return to each target point position in turn. When the target position is reached, the solenoid valve controls the trigger to fire the ballistic gun, and the bullet passes through the thin steel plate skin and shoots into the protective steel plate.

[0020] Step 8: After all the target points have been fired, turn off all power supplies, dismantle the ballistic gun, and check whether all the bullets have been fired;

[0021] Step 9: The controller reads the displacement data fed back by the strain gauge, observes the crater morphology under a scanning electron microscope, and evaluates the penetration effect of the bullet on the protective steel plate after passing through the thin steel plate skin in combination with the actual incident angle.

[0022] Preferably, the number of target spots in step 1 is 5.

[0023] Preferably, the target points are distributed in two equilateral triangles with one of the target points as a common vertex.

[0024] Preferably, the target point spacing corresponding to the two equilateral triangles is set according to the bullet diameter, wherein the target point spacing of one equilateral triangle is 3 to 5 times the bullet diameter, and the target point spacing of the other equilateral triangle is 8 to 12 times the bullet diameter.

[0025] Preferably, the specific distance in step 2 is 5m to 10m.

[0026] Preferably, the specific incident angle in step 3 is 15° to 75°.

[0027] The present invention also provides a computer-readable storage medium, which is used to store a computer program, and the computer program executes the method for testing the bullet penetration resistance of a steel plate based on the skin effect as described above.

[0028] The present invention also provides an electronic device, including a processor and a memory, wherein the processor and the memory communicate with each other via a communication bus; the memory is used to store computer programs; the processor is used to implement the above-mentioned method for testing the bullet penetration resistance of steel plates based on the skin effect when executing the computer programs stored in the memory.

[0029] Compared with the prior art, the present invention solves the problems of low test accuracy and low safety, and has the following specific beneficial effects:

[0030] By using the test system and the test method provided by the present invention, automatic testing can be realized, thus avoiding the error of manually operating the shooting point in the traditional test method, and the test result has high accuracy; the penetration of the bullet into the steel plate after passing through the skin at different incident angles can be obtained, and the possibility of personal injury to the test personnel caused by the rebound of the bullet during close-range shooting is eliminated, thereby greatly improving the safety of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the test system described in Example 1;

[0032] Figure 2 This is a schematic diagram of the distribution position of the target points described in Example 6;

[0033] Figure 3 The penetration morphology of the thin steel plate skin after the test described in Example 9;

[0034] Figure 4 Penetration morphology of the protective steel plate after the test described in Example 9.

[0035] Description of reference numerals:

[0036] 1. Ballistic gun; 101. Laser sight; 102. Trigger; 103. Solenoid valve;

[0037] 2. Longitudinal slide rail; 3. Horizontal slide rail; 4. Horizontal stepper motor; 5. Longitudinal stepper motor; 6. Single chip microcomputer; 7. Thin steel plate skin; 8. Steel plate bracket; 9. Protective steel plate; 10. Strain gauge; 11. Controller. DETAILED DESCRIPTION

[0038] In order to make the technical solution of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the specification of the present invention. It should be noted that the following embodiments are only used to better understand the technical solution of the present invention and should not be understood as a limitation to the present invention.

[0039] Example 1.

[0040] This embodiment provides a steel plate anti-bullet penetration performance test system based on skin effect, as shown in FIG1 , including a ballistic gun 1, a longitudinal slide rail 2, a transverse slide rail 3, a transverse stepping motor 4, a longitudinal stepping motor 5, a single-chip computer 6, a thin steel plate skin 7, a steel plate bracket 8, a protective steel plate 9, a strain gauge 10 and a controller 11;

[0041] The ballistic gun 1 is provided with a laser sight 101 and a trigger 102. The laser sight 101 is electrically connected to the single-chip computer 6 through a wiring harness, and is used to identify the coordinates of the target point; the trigger 102 is provided with a solenoid valve 103, and the solenoid valve 103 is electrically connected to the single-chip computer 6 through a wiring harness, and is used to control the trigger 102 to achieve the firing of the ballistic gun 1;

[0042] The longitudinal slide rail 2, the transverse stepping motor 4 and the longitudinal stepping motor 5 are arranged on the transverse slide rail 3 and are electrically connected to the single chip microcomputer 6, and are used to control the ballistic gun 1 to move in the transverse slide rail 3 and the longitudinal slide rail 2;

[0043] The steel plate bracket 8 is used to fix the thin steel plate skin 7 and the protective steel plate 9 in parallel at a specific distance; the strain gauge 10 is installed on the side of the protective steel plate 9 away from the thin steel plate skin 7, and the strain gauge 10 is electrically connected to the controller 11 for feeding back displacement data after being hit.

[0044] The test system provided in this embodiment simulates manual shooting and can realize automatic testing, thus avoiding the errors of manual operation of shooting points in traditional testing methods, and the test results are highly accurate; and the possibility of personal injury to test personnel caused by bullet rebound during close-range shooting is eliminated, thereby greatly improving the safety of the test.

[0045] Example 2.

[0046] This embodiment is a further illustration of Embodiment 1, and the distance between the thin steel plate skin 7 and the protective steel plate 9 is 10 mm to 15 mm.

[0047] Example 3.

[0048] This embodiment provides a method for testing the bullet penetration resistance of a steel plate based on the skin effect, using the system described in Embodiment 1 or 2, and specifically comprising the following steps:

[0049] Step 1, marking a number of target points on the projectile-facing surface of the thin steel plate skin 7;

[0050] Step 2, move the steel plate support 8 to a specific distance between the muzzle and the thin steel plate skin 7;

[0051] Step 3, tilt the steel plate support 8 so that the muzzle direction and the thin steel plate skin 7 are at a specific incident angle;

[0052] Step 4: Load several rounds of ammunition into the ballistic gun 1, and the test personnel evacuate to a safe location;

[0053] Step 5, sending instructions to the horizontal stepping motor 4 and the vertical stepping motor 5, driving the ballistic gun 1 to move in the horizontal slide rail 3 and the vertical slide rail 2, thereby driving the laser sight 101 to move;

[0054] Step 6, the laser sight 101 automatically scans the bullet-facing surface area of ​​the thin steel plate skin 7 while moving with the ballistic gun 1, and automatically records the coordinate value when scanning to the target point, and ends the scanning after the target point is identified;

[0055] Step 7, the program controls the lateral stepping motor 4 and the longitudinal stepping motor 5 to drive the ballistic gun 1 to return to each target point position in turn. When reaching the target position, the solenoid valve 103 controls the trigger 102 to fire the ballistic gun 1, and the bullet passes through the thin steel plate skin 7 and shoots into the protective steel plate 9;

[0056] Step 8: After all the target points have been fired, turn off all power supplies, dismantle the ballistic gun 1, and check whether all the bullets have been fired;

[0057] Step 9, the controller 11 reads the displacement data fed back by the strain gauge, observes the crater morphology under a scanning electron microscope, and evaluates the penetration effect of the bullet on the protective steel plate 9 after passing through the thin steel plate skin 7 in combination with the actual incident angle.

[0058] The test method provided in this embodiment uses a laser sight to identify the coordinates of a preset target point to achieve precise shooting, and the test result has high accuracy; and the shooting distance can be arbitrarily adjusted according to the test requirements. Compared with traditional manual operation, this method avoids personal injury to test personnel caused by bullet rebound during close-range shooting, which is of great significance in improving safety.

[0059] Example 4.

[0060] This example is a further illustration of Example 3, and the number of target points in step 1 is 5.

[0061] In most traditional testing methods, the number of target points is set to 3. This embodiment appropriately increases the number of target points, making the test results more reliable.

[0062] Example 5.

[0063] This embodiment is a further illustration of Embodiment 4. The position distribution of the target points is as follows: the target points are distributed in two equilateral triangles with one of the target points as a common vertex.

[0064] Example 6.

[0065] This embodiment is a further example of the fifth embodiment. The distribution positions of the target points on the thin steel plate skin impact surface 7 are as follows: Figure 2 As shown, the target point spacing corresponding to the two equilateral triangles is set according to the bullet diameter, wherein the target point spacing of one equilateral triangle is 3 to 5 times the bullet diameter, and the target point spacing of the other equilateral triangle is 8 to 12 times the bullet diameter.

[0066] This embodiment adds two closer targets based on the three targets set in the traditional test method, further ensuring the reliability of the test.

[0067] Example 7.

[0068] This embodiment is a further illustration of Embodiment 3, and the specific distance described in Step 2 is 5 m to 10 m.

[0069] Example 8.

[0070] This embodiment is a further illustration of Embodiment 3. The specific incident angle in step 3 is 15° to 75°.

[0071] Example 9.

[0072] This embodiment is tested according to the steps of embodiment 3. The distance between the protective steel plate 15 and the thin steel plate skin 13 is 12 mm. The number of target points is 5, with one of the target points as the common vertex, distributed in two equilateral triangles. The distance between the target points of one equilateral triangle is 5 times the bullet diameter, and the distance between the target points of the other equilateral triangle is 10 times the bullet diameter. The specific distance described in step 2 is 7.5 m, and the specific incident angle described in step 3 is 45°. After the above test, the penetration morphology of the thin steel plate skin 13 and the protective steel plate 15 are shown in Figure 1 and Figure 2, respectively. Figure 3 and Figure 4As shown, it can be seen that the testing method provided in the present application can realize automatic testing of the bullet penetration resistance of steel plates based on the skin effect, and can achieve accurate positioning of the target point for accurate shooting, and the test reliability is high.

[0073] Example 10.

[0074] This embodiment provides a computer-readable storage medium, which is used to store a computer program, and the computer program executes the method for testing the bullet penetration resistance of a steel plate based on the skin effect as described in any one of Embodiments 3-8.

[0075] Example 11.

[0076] The present embodiment provides an electronic device, including a processor and a memory, wherein the processor and the memory communicate with each other via a communication bus; the memory is used to store computer programs; the processor is used to implement the method for testing the bullet penetration resistance of steel plates based on the skin effect as described in any one of Examples 3-8 when executing the computer programs stored in the memory.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel plate anti-bullet penetration performance test system based on skin effect, characterized in that: It comprises a ballistic gun (1), a longitudinal slide rail (2), a transverse slide rail (3), a transverse stepping motor (4), a longitudinal stepping motor (5), a single chip computer (6), a thin steel plate skin (7), a steel plate bracket (8), a protective steel plate (9), a strain gauge (10) and a controller (11); The ballistic gun (1) is provided with a laser sight (101) and a trigger (102); the laser sight (101) is electrically connected to a single-chip computer (6) via a wiring harness and is used to identify the coordinates of a target point; the trigger (102) is provided with a solenoid valve (103); the solenoid valve (103) is electrically connected to the single-chip computer (6) via a wiring harness and is used to control the trigger (102) to achieve firing of the ballistic gun (1); The longitudinal slide rail (2), the transverse stepping motor (4) and the longitudinal stepping motor (5) are arranged on the transverse slide rail (3) and are electrically connected to the single chip computer (6) for controlling the ballistic gun (1) to move in the transverse slide rail (3) and the longitudinal slide rail (2); The steel plate bracket (8) is used to fix the thin steel plate skin (7) and the protective steel plate (9) in parallel at a specific distance; the strain gauge (10) is installed on the side of the protective steel plate (9) away from the thin steel plate skin (7), and the strain gauge (10) is electrically connected to the controller (11) for feeding back displacement data after being hit.

2. The steel plate anti-bullet penetration performance testing system based on skin effect according to claim 1 is characterized in that: The distance between the thin steel plate skin (7) and the protective steel plate (9) is 10 mm to 15 mm.

3. A method for testing the bullet penetration resistance of steel plates based on skin effect, characterized in that: The system according to claim 1 or 2 is applied, and specifically comprises the following steps: Step 1, marking a number of target points on the projectile-facing surface of the thin steel plate skin (7); Step 2, moving the steel plate support (8) to a position where the muzzle is at a specific distance from the thin steel plate skin (7); Step 3, tilt the steel plate support (8) so that the muzzle direction and the thin steel plate skin (7) are at a specific incident angle; Step 4: Load several bullets into the ballistic gun (1), and the test personnel evacuate to a safe location; Step 5, sending instructions to the transverse stepping motor (4) and the longitudinal stepping motor (5), driving the ballistic gun (1) to move in the transverse slide rail (3) and the longitudinal slide rail (2), thereby driving the laser sight (101) to move; Step 6, the laser sight (101) automatically scans the bullet-facing surface area of ​​the thin steel plate skin (7) while moving with the ballistic gun (1), and automatically records the coordinate value when scanning to the target point, and ends the scanning after the target point is identified; Step 7: The program controls the lateral stepping motor (4) and the longitudinal stepping motor (5) to drive the ballistic gun (1) to return to each target point position in sequence. When the target position is reached, the electromagnetic valve (103) controls the trigger (102) to fire the ballistic gun (1), so that the bullet passes through the thin steel plate skin (7) and enters the protective steel plate (9); Step 8: After all the target points have been fired, turn off all power supplies, dismantle the ballistic gun (1), and check whether all the bullets have been fired; Step 9, the controller (11) reads the displacement data fed back by the strain gauge, observes the crater morphology under a scanning electron microscope, and evaluates the penetration effect of the bullet on the protective steel plate (9) after passing through the thin steel plate skin (7) in combination with the actual incident angle.

4. The method for testing the steel plate's anti-bullet penetration performance based on skin effect according to claim 3 is characterized in that: The number of target points in step 1 is 5.

5. The method for testing the steel plate's anti-bullet penetration performance based on skin effect according to claim 4 is characterized in that: The position distribution of the target points is as follows: the target points are distributed in two equilateral triangles with one of the target points as a common vertex.

6. The method for testing the steel plate's anti-bullet penetration performance based on skin effect according to claim 5 is characterized in that: The target point spacing corresponding to the two equilateral triangles is set according to the bullet diameter, wherein the target point spacing of one equilateral triangle is 3 to 5 times the bullet diameter, and the target point spacing of the other equilateral triangle is 8 to 12 times the bullet diameter.

7. The method for testing the bullet penetration resistance of steel plates based on skin effect according to claim 3 is characterized in that: The specific distance stated in step 2 is 5m to 10m.

8. The method for testing the bullet penetration resistance of steel plates based on skin effect according to claim 3 is characterized in that: The specific incident angle in step 3 is 15° to 75°.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program executes the method for testing the bullet penetration resistance of a steel plate based on the skin effect as described in any one of claims 3 to 8.

10. An electronic device, characterized in that: It includes a processor and a memory, wherein the processor and the memory communicate with each other via a communication bus; the memory is used to store computer programs; the processor is used to implement the method for testing the bullet penetration resistance of steel plates based on the skin effect as described in any one of claims 3 to 8 when executing the computer programs stored in the memory.

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