A modular projectile posture and speed testing device and method

Abstract

The present invention discloses a modular projectile posture and velocity testing device and method, comprising a telescopic rod, a clamping frame, and target paper. The two telescopic rods are spaced apart and their position is adjustable. A clamping frame is fixed to the top of each telescopic rod, and the target paper is clamped to the clamping frame, with the two target papers being parallel to each other. The present invention can be modularly produced and assembled, is easy to use, and enables rapid loading and unloading of target paper. It can clamp penetration test objects of different thicknesses and types. The target frame (i.e., the telescopic rod and the clamping frame) can slide on a slide rail to enable adjustment of a dedicated penetration test object (target paper is selected in this application). A physical ranging module can be provided on the slide rail to ensure that each target frame is in the desired test position to avoid errors. In addition, multiple slides can be provided, with one target frame configured for each slide rail, enabling arbitrary selection of the number of targets. The present invention has simple speed measurement, convenient testing, quick modular assembly and disassembly, and is flexible and versatile, making it easy to promote.

Description

Technical Field

[0001] The invention relates to a modular projectile posture and speed testing device and method. Background Art

[0002] The existing projectile velocity measurement and projectile attitude test devices have redundant structures, making it difficult to directly adjust the target frame spacing, inconvenient to disassemble and transport, and troublesome to load and unload target paper, resulting in low efficiency of velocity measurement and attitude testing. Summary of the Invention

[0003] The present invention aims to solve the above problems in the prior art and provides a modular projectile posture and speed testing device and method.

[0004] The technical solutions adopted in the present invention are:

[0005] A modular projectile posture and speed testing device includes a telescopic rod, a clamping frame and a target paper. The two telescopic rods are arranged at intervals and the position between the two telescopic rods is adjustable. A clamping frame is fixed at the top of each telescopic rod, and the target paper is clamped on the clamping frame. The two target papers are parallel to each other.

[0006] Furthermore, the clamping frame includes a rectangular frame, a lower locking plate and an upper locking plate. The rectangular frame is fixed to the telescopic rod. The lower locking plate and the upper locking plate are respectively arranged parallel to the lower side and upper side of the rectangular frame. The lower end of the target paper is fixed between the lower locking plate and the rectangular frame, and the upper side is fixed between the upper locking plate and the rectangular frame.

[0007] Furthermore, the lower locking plate moves closer to or away from the rectangular frame in a translational manner, and the upper locking plate moves closer to or away from the rectangular frame in a flipping manner. When the lower locking plate and the upper locking plate are tightly fitted with the rectangular frame, the target paper is clamped and fixed on the rectangular frame.

[0008] Furthermore, the rectangular frame is provided with a spring-loaded locking mechanism for locking the lower locking plate, which includes an eccentric wheel, a spring and a mounting shaft. The two mounting shafts are symmetrically fixed at the two ends of the lower side of the rectangular frame. The lower locking plate is connected to the mounting shaft, and the spring is sleeved on the mounting shaft, and the two ends are in contact with the lower locking plate and the lower side. The eccentric wheel is rotatably connected to the end of the mounting shaft.

[0009] Furthermore, the rectangular frame is provided with a flip-down locking mechanism for locking the upper locking plate, which includes a mounting seat, a mounting rod, a hinged rod and a locking rod. The mounting seat is fixed on the rectangular frame, one end of the mounting rod is hinged to the mounting seat, and the other end is fixed to the upper locking plate. The two ends of the hinged rod are hinged to the mounting rod and the locking rod respectively. An arc groove is provided on the mounting seat, and a pin is provided at the end of the locking rod, and the pin is passed through the arc groove.

[0010] Furthermore, the locking rod is a U-shaped rod, the pin shaft is passed through the arc groove and the two ends are connected to the two sides of the locking rod, and the hinged rod is hinged in the U groove of the locking rod.

[0011] Furthermore, a support pin is provided on the side wall of the mounting seat.

[0012] Furthermore, a limiting opening is provided on the groove wall of the arc-shaped groove on the side close to the rectangular frame.

[0013] Furthermore, the device also includes a slide rail and a slider, the two sliders are slidably connected to the slide rail, and a telescopic rod is fixed on each slider.

[0014] The present invention also provides a testing method.

[0015] 1) Place two target papers between the gun and the target, with the distance between the two target papers being l1 and the distance between the target paper closer to the target being l2;

[0016] The gun shoots a projectile at the target. The average speed of the projectile between the two target papers is:

[0017]

[0018] Where: t1 is the time when the projectile reaches the target paper close to the gun, and t2 is the time when the projectile reaches the target paper on the other side;

[0019] The moment when the projectile reaches the target is:

[0020]

[0021] 2) The projectile passes through the target paper and drills a hole in the target paper that shows its posture. The target paper is removed and the nutation angles θ1 and θ2 of the holes on each target paper are measured. The nutation angular velocity β1 of the projectile is then calculated using the formula:

[0022]

[0023] The nutation angle of the projectile reaching the target is:

[0024]

[0025] 3) The long axis lengths of the holes left by the projectiles on the two target papers are measured to be R1 and R2 respectively, and the axial length of the projectile is measured to be L D , and the attack angles of the projectiles on the two target papers are calculated as follows:

[0026]

[0027] The angular velocity of the projectile at the angle of attack is:

[0028]

[0029] The angle of attack of the projectile reaching the target is:

[0030]

[0031] The present invention has the following beneficial effects:

[0032] The present invention can be produced and assembled in a modular manner, is easy to use, and can realize the rapid assembly and disassembly of target paper. It can clamp penetration test objects of different thicknesses and types. The target frame (i.e., the telescopic rod and the clamping frame) can slide on the slide rail to realize the adjustment of the special penetration test object (the target paper is selected in this application). The slide rail can be provided with a physical ranging module to ensure that each target frame is in the required position for the test to avoid errors. In addition, multiple sliders can be provided, with one target frame configured for each slide rail, to realize the arbitrary selection of the number. The present invention has simple speed measurement, convenient testing, fast modular assembly and disassembly, flexibility and versatility, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural diagram of the present invention.

[0034] Figure 2 This is the structural diagram of the clamping frame.

[0035] Figure 3 and Figure 4 It is the structural diagram of the spring-loaded locking mechanism.

[0036] Figure 5 and Figure 6 This is a structural diagram of the flip-lock mechanism.

[0037] Figure 7 The state diagram after the locking plate is fully flipped up.

[0038] Figure 8 Schematic diagram of the present invention when tested and used.

[0039] Figure 9 (a) and (b) are schematic diagrams of the nutation angles of the holes on the two target papers. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the accompanying drawings.

[0041] like Figure 1 The present invention provides a modular projectile posture and speed testing device, which includes a telescopic rod 1, a clamping frame 2 and a target paper. The two telescopic rods 1 are arranged at intervals, and the position between the two telescopic rods 1 is adjustable. A clamping frame 2 is fixed at the top of each telescopic rod 1, and the target paper is clamped on the clamping frame 2. The two target papers are parallel to each other.

[0042] like Figure 2The clamping frame 2 includes a rectangular frame 21, a lower locking plate 22 and an upper locking plate 23. The rectangular frame 21 is fixed to the telescopic rod 1. The lower locking plate 22 and the upper locking plate 23 are arranged parallel to the lower side and upper side of the rectangular frame 21 respectively. The lower end of the target paper is fixed between the lower locking plate and the rectangular frame, and the upper side is fixed between the upper locking plate and the rectangular frame.

[0043] The lower locking plate 22 moves closer to or away from the rectangular frame 21 in a translational manner, and the upper locking plate 23 moves closer to or away from the rectangular frame 21 in a flipping manner. When the lower locking plate 22 and the upper locking plate 23 are tightly fitted with the rectangular frame 21, the target paper is clamped and fixed on the rectangular frame.

[0044] like Figure 3 and Figure 4 The rectangular frame 21 is provided with a spring-loaded locking mechanism for locking the lower locking plate 22. The spring-loaded locking mechanism includes an eccentric wheel 31, a spring 32, and a mounting shaft 33. The two mounting shafts 33 are symmetrically fixed at both ends of the lower side of the rectangular frame 21. The lower locking plate 22 is connected to the mounting shafts 33. The spring 32 is sleeved on the mounting shafts 33, with both ends contacting the lower locking plate 22 and the lower side of the rectangular frame 21. The eccentric wheel 31 is rotatably connected to the end of the mounting shaft 33. A wrench is fixed to the eccentric wheel 31.

[0045] When installing the target paper, the wrench is pulled, and the spring 32 causes the lower locking plate 22 to spring open. The target paper is then inserted between the lower locking plate 22 and the lower side of the rectangular frame 21. The wrench is then pulled again to lock the lower end of the target paper. To prevent the spring from interfering with the perfect fit between the lower locking plate 22 and the lower side, countersunk holes are provided on the inner end surface of the lower locking plate 22 and the outer end surface of the lower side. The two ends of the spring are abutted against the countersunk holes.

[0046] like Figure 5 and Figure 6 A flip-over locking mechanism for locking the upper locking plate 23 is provided on the rectangular frame 21, which includes a mounting seat 41, a mounting rod 42, a hinged rod 43 and a locking rod 44. The mounting seat 41 is fixed on the rectangular frame 21, one end of the mounting rod 42 is hinged to the mounting seat 41, and the other end is fixed to the upper locking plate 23. The two ends of the hinged rod 43 are hinged to the mounting rod 42 and the locking rod 44 respectively. An arc groove 411 is provided on the mounting seat 41, and the arc mouth of the arc groove 411 faces downward. A pin shaft 441 is provided at the end of the locking rod 44, and the pin shaft 441 is passed through the arc groove 411.

[0047] The locking rod 44 adopts a U-shaped structure. The pin 441 is inserted into the arc groove 411 and its two ends are connected to the two sides of the locking rod 44. The hinge rod 43 is hinged in the U groove of the locking rod 44.

[0048] Figure 5This is a diagram showing a state in which the upper locking plate 23 is locked and fitted onto the rectangular frame 21 . When the upper locking plate 23 is locked, the locking lever 44 is pulled, and the pin 441 is located outside the arc-shaped slot 411 .

[0049] The purpose of providing the arc groove 411 on the mounting seat 41 in the present application is to enable the locking plate 23 to be away from the rectangular frame 21 when the locking plate 23 is flipped up, thereby leaving more operating space for facilitating the prevention of target paper. Figure 7 This is the state where the upper locking plate 23 is flipped up. At this time, the upper locking plate 23 is as far away from the rectangular frame 21 as possible. The space A between the upper locking plate 23 and the rectangular frame 21 is large enough, which greatly facilitates the user's operation.

[0050] When flipping up the locking plate 23, first pull the locking rod 44. After the locking force is released, pull the pin 441 at the inner end of the locking rod 44 to move it along the arc groove 411. After the pin 441 moves to the inner side of the arc groove 411, lift the locking plate 23 to the fully open state. Figure 6 .

[0051] In order to keep the upper locking plate 23 in the fully open state and facilitate the operator to lay the target paper, a support pin 412 is provided on the side wall of the mounting base 41. After the pin shaft 441 is pulled to the inner side of the arc-shaped groove 411, the locking rod 44 is located above the support pin 412. After the locking rod 44 is lowered, the locking rod 44 is supported on the support pin 412, and the upper locking plate 23 is kept in the fully open state.

[0052] In order to prevent the locking rod 44 from slipping in the open state, a limiting opening 413 is provided on the groove wall of the arc groove 411 close to the rectangular frame 21. After the locking rod 44 is opened, the pin 441 is stuck in the limiting opening 413.

[0053] The top end surface of the upper side of the rectangular frame 21 is an arc surface structure. After the lower locking plate 22 and the upper locking plate 23 are fixed, the upper end of the target paper is folded along the arc surface.

[0054] The lower locking plate 22 in this application moves toward or away from the rectangular frame 21 in a translational manner for ease of operation. When placing the target paper, the lower end of the target paper can be simply inserted and then quickly locked. The upper locking plate 23 is flipped for ease of operation. The space A between the upper locking plate 23 and the rectangular frame 21 is sufficiently large to facilitate the upper fixation of the target paper. In actual use, the two structures can also be reversed, that is, the lower locking plate 22 is flipped and the locking plate 23 is translated.

[0055] The adjustable position between the two telescopic rods 1 is achieved by setting a slide rail 51 and a slider 52. The two sliders 52 are slidably connected to the slide rail 51. The slider 52 is provided with a locking bolt for fixing the position of the slider, and a telescopic rod 1 is fixed on each slider.

[0056] The telescopic rod 1 includes a sub-rod, a mother rod and a locking bolt. The sub-rod is inserted into the mother rod. The locking bolt is threadedly connected to the mother rod and contacts the sub-rod. When adjusting the height, just loosen the locking bolt.

[0057] like Figure 8 , the test method of this device is:

[0058] 1) Place two target papers between the gun and the target, with the distance between the two target papers being l1 and the distance between the right target paper and the target body being l2;

[0059] The gun shoots a projectile at the target. The average speed of the projectile between the two target papers is:

[0060]

[0061] Where: t1 is the time when the projectile reaches the target paper on the left, and t2 is the time when the projectile reaches the target paper on the right;

[0062] The moment when the projectile reaches the target is:

[0063]

[0064] 2) If Figure 9 , the projectile passes through the target paper and drills a hole in the target paper showing its posture. The target paper is removed and the nutation angles θ1 and θ2 of the holes on each target paper are measured. Then the nutation angular velocity β1 of the projectile is calculated using the formula:

[0065]

[0066] The nutation angle of the projectile reaching the target is:

[0067]

[0068] 3) The long axis lengths of the holes left by the projectiles on the two target papers are measured to be R1 and R2 respectively, and the axial length of the projectile is measured to be L D , and the attack angles of the projectiles on the two target papers are calculated as follows:

[0069]

[0070] The angular velocity of the projectile at the angle of attack is:

[0071]

[0072] The angle of attack of the projectile reaching the target is:

[0073]

[0074] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A modular projectile posture and velocity testing device, characterized by: The invention comprises a telescopic rod (1), a clamping frame (2) and a target paper, wherein the two telescopic rods (1) are arranged at intervals and the position between the two telescopic rods (1) is adjustable, a clamping frame (2) is fixed at the top end of each telescopic rod (1), and the target paper is clamped on the clamping frame (2), and the two target papers are parallel to each other; the clamping frame (2) comprises a rectangular frame (21), a lower locking plate (22) and an upper locking plate (23), The lower locking plate (22) moves closer to or farther from the rectangular frame (21) in a translational manner, and the upper locking plate (23) moves closer to or farther from the rectangular frame (21) in a flipping manner; The rectangular frame (21) is provided with a flip-up locking mechanism for locking the upper locking plate (23), which includes a mounting seat (41), a mounting rod (42), a hinged rod (43) and a locking rod (44). The mounting seat (41) is fixed to the rectangular frame (21). One end of the mounting rod (42) is hinged to the mounting seat (41), and the other end is fixed to the upper locking plate (23). The two ends of the hinged rod (43) are hinged to the mounting rod (42) and the locking rod (44), respectively. An arc groove (411) is provided on the mounting seat (41), and a pin shaft (441) is provided at the end of the locking rod (44). The pin shaft (441) is inserted into the arc groove (411). The locking rod (44) is a U-shaped rod, the pin (441) is inserted into the arc groove (411) and its two ends are connected to the two sides of the locking rod (44), and the hinge rod (43) is hinged in the U groove of the locking rod (44); A support pin (412) is provided on the side wall of the mounting seat (41); A limiting opening (413) is provided on the groove wall of the arc-shaped groove (411) on the side close to the rectangular frame (21); The top end surface of the upper side of the rectangular frame (21) is an arc surface structure, and the upper end of the target paper is folded along the arc surface.

2. The modular projectile posture and velocity testing device according to claim 1, characterized in that: The rectangular frame (21) is fixed to the telescopic rod (1), and the lower locking plate (22) and the upper locking plate (23) are respectively arranged parallel to the lower side and the upper side of the rectangular frame (21). The lower end of the target paper is fixed between the lower locking plate and the rectangular frame, and the upper side is fixed between the upper locking plate and the rectangular frame.

3. The modular projectile posture and velocity testing device according to claim 1, characterized in that: When the lower locking plate (22) and the upper locking plate (23) are closely fitted to the rectangular frame (21), the target paper is clamped and fixed on the rectangular frame.

4. The modular projectile posture and velocity testing device according to claim 3, characterized in that: The rectangular frame (21) is provided with a spring-loaded locking mechanism for locking the lower locking plate (22), which includes an eccentric wheel (31), a spring (32) and a mounting shaft (33). The two mounting shafts (33) are symmetrically fixed at the two ends of the lower side of the rectangular frame (21). The lower locking plate (22) is connected to the mounting shaft (33). The spring (32) is sleeved on the mounting shaft (33), and the two ends of the spring (32) are in contact with the lower locking plate (22) and the lower side. The eccentric wheel (31) is rotatably connected to the end of the mounting shaft (33).

5. The modular projectile posture and velocity testing device according to claim 1, characterized in that: The device further comprises a slide rail (51) and a slider (52), wherein the two sliders are slidably connected to the slide rail, and a telescopic rod (1) is fixed to each slider.

6. A method for testing a testing device according to any one of claims 1 to 5, characterized in that: 1) Place two target papers between the gun and the target, with the distance between the two target papers being l1 and the distance between the target paper closer to the target being l2; The gun shoots a projectile at the target. The average speed of the projectile between the two target papers is: ； Where: t1 is the time when the projectile reaches the target paper close to the gun, and t2 is the time when the projectile reaches the target paper on the other side; The moment when the projectile reaches the target is: ； 2) The projectile passes through the target paper and makes a hole in the target paper showing its posture. Remove the target paper and measure the nutation angle of each hole on the target paper. and , and then calculate the projectile nutation angular velocity , the formula is: ； The nutation angle of the projectile reaching the target is: ； 3) The measured lengths of the long axes of the holes left by the bullets on the two target papers are and , the axial length of the projectile is measured to be , and the attack angles of the projectiles on the two target papers are calculated as follows: ， ， The angular velocity of the projectile at the angle of attack is: ， The angle of attack of the projectile reaching the target is: 。

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