A target plate penetration resistance testing device with unidirectional translation and bidirectional rotation

Abstract

This invention relates to a target plate penetration resistance testing device with unidirectional translation and bidirectional rotation, comprising a test frame, a target plate suspension mechanism, and a target plate rotation limiting mechanism. The target plate is suspended to the test frame by the target plate suspension mechanism, which is configured to allow the target plate to be in unidirectional translation and bidirectional rotation by suspension. At the same time, the center height of the target plate can be adjusted by adjusting the length of the suspension cable in the target plate suspension mechanism. The target plate rotation limiting mechanism is used to adjust the test angle of the target plate to conduct penetration resistance tests at different angles.

Description

Technical Field

[0001] This invention relates to a target plate setting device, specifically to a target plate penetration resistance testing device with unidirectional translation and bidirectional rotation. Background Technology

[0002] In range testing, the design and installation structure of the target plate and target frame are among the factors affecting the test results. Different types of ammunition have different requirements for the target plate during impact tests, and even the same type of ammunition may have different requirements for the target plate when conducting different tests.

[0003] In the same test, the artillery firing positions at the range are basically fixed. Therefore, during ammunition impact tests, the height of the target plate center needs to be adjusted according to the test height requirements for each test to keep the target plate center basically consistent with the muzzle height. In addition, in non-fixed target plate tests, different projectile-to-target mass ratios affect the magnitude and direction of the projectile's velocity after impacting the target plate.

[0004] To investigate the effect of different projectile-target mass ratios on the change of projectile velocity vector under non-fixed conditions, a device for testing non-fixed target plates is proposed. This device should be able to achieve different projectile-target mass ratios, that is, without changing the original size and thickness of the target plate, different mass targets can be set up. This device can be used to study the change law of projectile velocity vector under different projectile-target mass ratios, while keeping the thickness of the projectile penetrating the target and the stress conditions unchanged. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide a target plate penetration resistance testing device with unidirectional translational bidirectional rotation, comprising a test frame, a target plate suspension mechanism, and a target plate rotation limiting mechanism. The target plate is suspended to the test frame by the target plate suspension mechanism, which is configured to allow the target plate to be in unidirectional translational bidirectional rotation by suspension. At the same time, the center height of the target plate can be adjusted by adjusting the length of the suspension cable in the target plate suspension mechanism. The target plate rotation limiting mechanism adjusts the test angle of the target plate to conduct penetration resistance tests of the target plate with unidirectional translational bidirectional rotation at different angles.

[0006] The test frame is a frame structure, which includes connectors, transverse members and longitudinal members.

[0007] The target plate suspension mechanism includes a slide rail, guide members, suspension cables, and lifting rings. The sliding guide member at the end of the crossbeam slides along the sliding guide groove on the side of the transverse member to fine-tune the horizontal deviation of the target plate center relative to the muzzle. A traveling mechanism is provided at the bottom of the test frame to achieve coarse adjustment of the rotation limit mechanism relative to the horizontal deviation of the muzzle. The target plate counterweights are detachably connected to the target plate to adjust the target-projectile mass ratio. The counterweights are grouped in sets of four, with each counterweight in the same group having an equal mass and being cubic in shape. The counterweights are simultaneously positioned at the top, bottom, and two sides of the target plate to ensure consistent force distribution during impact. The counterweights are positioned at the center of the top, bottom, and two sides of the target plate and are fixed with fasteners. In this invention, "positioned at the center of the top, bottom, and two sides of the target plate" refers to the center of the top, bottom, and two sides of the target plate. Multiple sets of counterweights of different masses can be used during the test to ensure that penetration tests can be conducted on target plates of different masses and the same penetration depth.

[0008] The technical solution of the present invention is as follows:

[0009] A target plate penetration resistance testing device with unidirectional translational and bidirectional rotation includes a test frame, a target plate suspension mechanism, and a target plate rotation limiting mechanism. The target plate is suspended from the test frame by the suspension mechanism, allowing for unidirectional translational and bidirectional rotation of the target plate. The center height of the target plate can be adjusted by changing the length of the suspension cable in the suspension mechanism. The target plate rotation limiting mechanism allows for adjustment of the test angle of the target plate to conduct penetration resistance tests at different angles.

[0010] The test frame is a frame structure, which includes connectors, transverse members and longitudinal members.

[0011] The ends of the transverse members are provided with bevels, and the bevels of two adjacent transverse members contact each other, making the two adjacent transverse members perpendicular to each other. The four transverse members are connected to form the top of the test frame. Similarly, the four transverse members are connected to form the bottom of the test frame. A connector is provided between two adjacent transverse members at the top of the test frame. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector contact the two adjacent transverse members respectively. The connector is fixed to the transverse members by fasteners, such as screws. Preferably, the connector is provided with a through hole, and the transverse members are provided with threaded holes. The fastener passes through the through hole of the connector and is screwed into the threaded hole on the side of the transverse member to fix the top of the test frame.

[0012] A connector is provided between two adjacent transverse members at the bottom of the test frame. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector respectively contact the two adjacent transverse members. The connector is fixed to the transverse members by fasteners, such as screws. Preferably, the connector is provided with a through hole, and the transverse members are provided with threaded holes. The fastener passes through the through hole of the connector and is screwed into the threaded hole on the side of the transverse member to fix the bottom of the test frame.

[0013] The top and bottom of the test frame are supported and connected by longitudinal members. The longitudinal members support the four corners at the top of the test frame.

[0014] The longitudinal member is fixed to its adjacent transverse member by a connector. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector contact the longitudinal member and the transverse member adjacent to the longitudinal member, respectively. The connector is fixed to the longitudinal member and the transverse member by fasteners, such as screws. Preferably, the connector is provided with a through hole, and the transverse member and the longitudinal member are provided with threaded holes. Fasteners pass through the through hole of the connector and are screwed into the threaded holes on the side of the transverse member and the side of the longitudinal member, thereby fixing the longitudinal member to the top of the test frame.

[0015] Preferably, the target plate suspension mechanism includes a slide rail, a guide member, a suspension cable, and a lifting ring.

[0016] The slide rail is connected to the top of the test frame. Preferably, a crossbeam is provided at the top of the test frame, which can move along the top of the test frame to drive the target plate to move perpendicular to the muzzle direction. The crossbeam at the top of the test frame can increase the structural rigidity of the top of the test frame. When suspending the target plate from the top of the test frame by suspension cables, it can increase the straightness of the slide rail.

[0017] Preferably, a sliding guide groove is provided on the inner side of the transverse member at the top of the test frame that is perpendicular to the direction of projectile flight. That is, a guide groove is provided on the inner surface of the transverse member that is opposite to it. Sliding guides are provided at both ends of the crossbeam. The sliding guides at the ends of the crossbeam slide along the sliding guide groove on the side of the transverse member to adjust the horizontal deviation of the target plate center relative to the muzzle.

[0018] Preferably, during the test, the target plate is located inside the test frame, the slide rail is fixed to the top of the test frame, the slider slides along the slide rail in the length direction, a hanging ring is provided on the lower surface of the slider, the first end of the suspension cable is connected to the hanging ring, the second end of the suspension cable is connected to the target plate, and the center height of the target plate is adjusted by adjusting the length of the suspension cable between the hanging ring and the target plate.

[0019] A positioning plate is installed below the target plate, and the positioning plate is rotatably connected to the positioning plate mounting part to allow the positioning plate to rotate in the horizontal plane. The positioning plate mounting part is fixed to the bottom of the test frame by a telescopic rod. A limit rod is provided on the upper surface of the positioning plate, and the test angle of the target plate during the test is adjusted by the limit rod to conduct target plate penetration resistance tests at different angles. A support member is provided at the bottom of the test frame, and the length direction of the support rod is perpendicular to the length direction of the crossbeam at the top of the test frame. The telescopic rod is connected to the test frame through the support member. The telescopic rod includes an inner rod and an outer rod, with the outer rod sleeved over the inner rod. Adjustment holes are provided on both the inner and outer rods at equal intervals. The distance of the telescopic rod is adjusted by different mating of the adjustment holes on the inner rod and the outer rod, thereby adjusting the height of the positioning plate and the target plate on it. After the height adjustment is completed, fasteners are used to fix it through the adjustment holes. Preferably, two or more fasteners are used for adjustment. The outer rod of the telescopic rod is connected to the support rod at the bottom of the test frame, and the support rod is fixed to the transverse member at the bottom of the test frame, for example, the side of the transverse member, by a connector. The top of the inner rod of the telescopic pole is connected to the mounting part of the positioning plate.

[0020] Preferably, in order to increase the structural stability of the telescopic pole, a support frame is provided on the side of the telescopic pole. The upper crossbar of the support frame is connected to the side of the outer pole of the telescopic pole. A symmetrically arranged connector is provided at the connection between the upper crossbar of the support frame and the outer pole of the telescopic pole. The connector is fixedly connected to the outer pole of the telescopic pole, for example, by fasteners or welding.

[0021] Preferably, the horizontal bar at the bottom of the support frame contacts the vertical bar and is perpendicular to each other. The horizontal bar and vertical bar at the bottom of the support frame are fixed by a connector. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector are fixed to the horizontal bar at the bottom of the support frame and the vertical bar of the support frame. The above-mentioned fixing method can be to use fasteners, such as screws, to fix the connector to the vertical bar and the horizontal bar at the bottom of the support frame. As an alternative, the connector can be welded to the horizontal bar at the bottom of the support frame and the vertical bar of the support frame respectively.

[0022] Preferably, when using fasteners, the connector is provided with a through hole, and the crossbar and longitudinal bar are provided with threaded holes. The fastener passes through the through hole of the connector and is screwed into the threaded hole on the side of the crossbar and the threaded hole on the side of the longitudinal bar, thereby fixing the crossbar at the bottom of the support frame to the longitudinal bar of the support frame.

[0023] The lower crossbar of the support frame contacts the outer pole line of the telescopic rod, and the lower crossbar of the support frame aligns with the outer pole line of the telescopic rod. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector are fixed to the lower crossbar of the support frame and the outer pole of the telescopic rod. The above fixing method can be achieved by using fasteners, such as screws, to fix the connector to the lower crossbar of the support frame and the outer pole of the telescopic rod. Alternatively, the connector can be welded to both the lower crossbar of the support frame and the outer pole of the telescopic rod.

[0024] Preferably, when using fasteners, the connector is provided with a through hole, and the crossbar at the bottom of the support frame and the outer rod of the telescopic rod are provided with threaded holes. The fastener passes through the through hole of the connector and is screwed into the threaded hole on the side of the crossbar and the threaded hole on the side of the outer rod of the telescopic rod, thereby fixing the crossbar at the bottom of the support frame and the outer rod of the telescopic rod.

[0025] The support frame is provided with a connector on its side to fix the support frame to a preset position at the bottom of the frame, for example, to fix the support frame to the middle of the support rod.

[0026] Preferably, the positioning plate mounting part is connected to the support member through a telescopic rod. When adjusting the center height of the target plate, the length of the telescopic rod needs to be adjusted at the same time to ensure the distance between the positioning plate and the bottom of the target plate, so as to ensure that the limiting mechanism on the positioning plate can effectively limit the target plate.

[0027] The target plate rotation limiting mechanism is used to limit the target plate in a suspended state after the target plate height and angle are adjusted to the set position. It includes a positioning plate, a positioning plate mounting part, and a limiting rod. The positioning plate is located below the target plate and is rotatably connected to the positioning plate mounting part. The positioning plate mounting part is connected to the bottom of the test frame. The positioning plate can rotate relative to the positioning plate mounting part in a horizontal plane. A limiting rod is provided on the positioning plate, and the limiting rod rotates with the positioning plate. A baseline is set on the positioning plate mounting part, and a marking line is set on the positioning plate. Initially, the baseline and the marking line coincide, or the extension of the baseline coincides with the extension of the marking line. During the test, the angle that the target plate needs to rotate through is determined. After the positioning plate rotates, the angle between the marking line on the positioning plate and the baseline on the positioning plate mounting part is the target plate setting angle required for the test. A limiting rod mounting hole is provided on the positioning plate, and the limiting rod is placed in the limiting rod mounting hole. There are four limiting rods and four limiting rod mounting holes, arranged in pairs, forming a target plate accommodating space between the two sets of limiting rods. Preferably, the center of the positioning plate is rotatably connected to the positioning plate mounting part.

[0028] Preferably, the mounting hole for the limiting rod on the positioning plate is a through hole, and a fixing hole is provided on the mounting part of the positioning plate, with each fixing hole corresponding to one of the mounting holes for the limiting rod. The limiting rod passes through the mounting hole and is inserted into the fixing hole. The strength of the limiting rod is much less than the impact force experienced by the target plate during the test. Therefore, if the target plate is impacted, the limiting rod will break, without affecting the movement of the target plate. The fixing hole can also be located at other positions that can position the limiting rod and the positioning plate.

[0029] While rotating, the positioning plate moves relative to the mounting portion of the positioning plate along a length direction parallel to the support rod. Specifically, a groove is provided on the upper surface of the mounting portion of the positioning plate. The direction of the groove is consistent with the length direction of the support rod. A slider is provided on the positioning plate, which can slide along the groove. A cylindrical rotating connector is provided on the upper part of the slider. A through hole is provided in the center of the positioning plate. The positioning plate is fitted onto the cylindrical rotating connector of the slider. This arrangement allows the positioning plate to rotate while simultaneously adjusting the rotation limiting mechanism relative to the horizontal deviation of the muzzle through the sliding of the positioning plate relative to the mounting portion of the positioning plate.

[0030] Furthermore, a walking mechanism is provided at the bottom of the test frame. Preferably, the walking mechanism is a walking wheel, which enables coarse adjustment of the rotation limit mechanism relative to the horizontal deviation of the muzzle.

[0031] Furthermore, the device according to the invention can also include counterweights. Preferably, the counterweights are detachably connected to the target plate to adjust the projectile-target mass ratio. The counterweights are grouped in sets of four, with each counterweight within the same group having an equal mass. Multiple groups of counterweights of different masses can be set during testing to ensure that penetration tests can be conducted on target plates of different masses and the same penetration depth. Furthermore, the counterweights are simultaneously located on the top, bottom, and two sides of the target plate. The counterweights are located at the center of their respective surfaces. Preferably, threaded holes are provided at the center of the top, bottom, and two side surfaces of the target plate, and a through hole is provided at the center of the counterweight. When the counterweight needs to be installed, it is screwed into the corresponding threaded holes on the target plate using fasteners.

[0032] According to the counterweight method of the present invention, different mass projectile-to-target ratios can be achieved. That is, without changing the original size and thickness of the target plate, different mass targets can be set so that the force state of the projectile impacting the target plate does not change, and the mechanical force state of the projectile impacting the target plate does not change. In other words, the thickness of the target plate and the force state after penetration do not change significantly. This allows the device to study the change law of the projectile velocity vector under different mass ratios of projectile and target plate. At the same time, the device does not change the thickness of the projectile penetrating the target or the force state.

[0033] According to the present invention, when changing the target plate mass, it is only necessary to superimpose multiple sets of counterweights to effectively achieve any different projectile-target mass ratio, without the need to reproduce the target plate mold.

[0034] The counterweight method according to the present invention can effectively ensure the balance of the target plate under force in all directions.

[0035] More specifically, to ensure the target-to-bullet mass ratio, with the addition of counterweights, the initial target plate mass is preset to m0. When the counterweights are installed onto the target plate using fasteners, the mass of the fastener mounting holes removed from the target plate needs to be pre-removed. Let m1 be the mass of the fastener mounting holes removed from the target plate, and let m be the mass of a single counterweight in each set of counterweights. 2i The mass of the fastener is m3.

[0036] but

[0037] Where i is the i-th set of counterweights, n is the mass ratio of the projectile to the target, and m′ is the mass of the projectile.

[0038] Compared with the prior art, the advantages of the present invention are as follows:

[0039] According to the present invention, the target plate penetration resistance test device with unidirectional translation and bidirectional rotation has a slide rail fixed to the top of the test frame, and the sliding member can slide along the slide rail to ensure the free movement of the target plate after the collision.

[0040] According to the present invention, the target plate penetration resistance test device with unidirectional translation and bidirectional rotation can adjust the height of the target plate center by adjusting the length of the suspension cable.

[0041] The target plate penetration resistance testing device of the present invention, which involves unidirectional translation and bidirectional rotation, has a positioning plate disposed below the target plate. This positioning plate is rotatably connected to a positioning plate mounting part, which is connected to the bottom of the test frame. The positioning plate can rotate relative to the positioning plate mounting part in a horizontal plane. A limit rod is provided on the positioning plate, and the limit rod rotates together with the positioning plate. A baseline is set on the positioning plate mounting part, and a marking line is set on the positioning plate. Initially, the baseline and the marking line coincide, or the extension of the baseline coincides with the extension of the marking line. During the test, the angle through which the target plate needs to rotate is determined. After the positioning plate rotates, the angle between the marking line on the positioning plate and the baseline on the positioning plate mounting part is the target plate setting angle required for the test.

[0042] The target plate penetration resistance testing device of the present invention, which involves unidirectional translation and bidirectional rotation, is fixed to the bottom of the test frame by a telescopic rod. Preferably, the telescopic rod includes an inner rod and an outer rod, with the outer rod sleeved over the inner rod. Both the inner and outer rods are provided with equally spaced adjustment holes. The distance of the telescopic rod is adjusted by different mating points of the adjustment holes on the inner and outer rods, thereby adjusting the height of the positioning plate and, consequently, the target plate height. After height adjustment, fasteners are used to secure the plate through the adjustment holes. Preferably, two or more fasteners are used for adjustment.

[0043] According to the target plate penetration resistance testing device of the present invention, which features unidirectional translation and bidirectional rotation, the bottom of the test frame can also be equipped with traveling wheels, which are located at the four corners of the bottom of the test frame to further adjust the position between the center of the target plate and the muzzle. The angle of the target plate is adjusted during the test using a limiting rod, allowing for penetration resistance tests at different angles. Initially, the target plate is located directly above the positioning plate.

[0044] In the target plate penetration resistance testing device of the present invention, the test frame is a frame structure to reduce the weight of the test frame. The frame structure includes multiple rods, which are connected by connectors to form a detachable structure for easy carrying. The rods can also be made of various existing profiles, which are assembled by connectors to form the frame structure, thereby reducing the cost of processing and customization.

[0045] According to the target plate penetration resistance test device of the present invention, a crossbeam is provided at the top of the test frame, and a slide rail is connected to the lower surface of the crossbeam to increase the straightness of the slide rail and further ensure the action of the target plate after collision.

[0046] According to the target plate penetration resistance testing device of the present invention, the velocity measurement background is set on the test frame behind the target plate to form a contrast. The velocity measurement background is set as a black and white checkerboard pattern with evenly spaced black and white squares to increase contrast and ensure the accuracy of velocity measurement during the experiment. During the test, the projectile direction is parallel to the velocity measurement background.

[0047] In order to increase the overall strength of the test frame, the target plate penetration resistance test device of the present invention with unidirectional translation and bidirectional rotation is provided with supporting ribs at all right-angle connections of the test frame for structural reinforcement.

[0048] Furthermore, the device according to the invention can also include counterweights. Preferably, the counterweights are detachably connected to the target plate, with four counterweights per group, each counterweight having an equal mass. Multiple groups of counterweights of different masses can be set during the test to ensure that penetration tests can be conducted on target plates of different masses and with the same penetration depth. Furthermore, the counterweights are simultaneously located on the top, bottom, and two sides of the target plate. The counterweights are located at the center of their respective surfaces. Preferably, threaded holes are provided at the center of the top, bottom, and two side surfaces of the target plate, and a through hole is provided at the center of the counterweight. When the counterweight needs to be installed, it is screwed into the corresponding threaded holes on the target plate using fasteners.

[0049] According to the counterweight method of the present invention, different mass projectile-to-target ratios can be achieved. That is, without changing the original size and thickness of the target plate, different mass targets can be set so that the force state of the projectile impacting the target plate does not change, and the mechanical force state of the projectile impacting the target plate does not change. In other words, the thickness of the target plate and the force state after penetration do not change significantly. This allows the device to study the change law of the projectile velocity vector under different mass ratios of projectile and target plate. At the same time, the device does not change the thickness of the projectile penetrating the target or the force state.

[0050] According to the present invention, when changing the target plate mass, it is only necessary to superimpose multiple sets of counterweights to effectively achieve any different projectile-target mass ratio, without the need to reproduce the target plate mold.

[0051] The counterweight method according to the present invention can effectively ensure the balance of the target plate under force in all directions.

[0052] More specifically, to ensure the target-to-bullet mass ratio, with the addition of counterweights, the initial target plate mass is preset to m0. When the counterweights are installed onto the target plate using fasteners, the mass of the fastener mounting holes removed from the target plate needs to be pre-removed. Let m1 be the mass of the fastener mounting holes removed from the target plate, and let m be the mass of a single counterweight in each set of counterweights. 2i The mass of the fastener is m3.

[0053] but

[0054] Where i is the i-th set of counterweights, n is the mass ratio of the projectile to the target, and m′ is the mass of the projectile.

[0055] Instruction manual illustrations

[0056] Figure 1 This is a schematic diagram of the test frame in the target plate penetration resistance test device with unidirectional translation and bidirectional rotation according to the present invention;

[0057] Figure 2 This is a schematic diagram of the structure after the target plate is installed on the test frame according to the present invention;

[0058] Figure 3 This is a schematic diagram of the target plate installation according to the present invention;

[0059] Figure 4 This is a schematic diagram of the target plate suspension according to the present invention.

[0060] Wherein: 1-Test frame; 2-Crossbeam; 3-Speed ​​measurement background; 4-Positioning plate mounting part; 5-Telescopic rod; 6-Positioning plate; 7-Suspension cable; 8-Target plate; 9-Counterweight; 10-Limiting rod. Detailed Implementation

[0061] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0062] A target plate penetration resistance testing device with unidirectional translation and bidirectional rotation includes a test frame, a target plate suspension mechanism, and a target plate rotation limiting mechanism. The target plate is suspended from the test frame by the suspension mechanism, allowing for unidirectional translation and bidirectional rotation of the target plate. The center height of the target plate can be adjusted by adjusting the length of the suspension cable in the suspension mechanism. The target plate rotation limiting mechanism allows for adjustment of the target plate test angle to conduct penetration resistance tests at different angles.

[0063] Unidirectional translational motion refers to the target plate being able to move along the muzzle axis, that is, to move directly in the direction of the muzzle, or in other words, the target plate can move back and forth.

[0064] Bidirectional rotation refers to the target plate being able to rotate around a plumb line passing through the center of the target plate as an axis of rotation, and the target plate being able to rotate around a horizontal line passing through the center of the target plate as an axis of rotation, with the horizontal line being parallel to the surface of the target plate.

[0065] The test frame is a frame structure, which includes connectors, transverse members and longitudinal members.

[0066] The ends of the transverse members are provided with bevels, and the bevels of two adjacent transverse members contact each other, making the two adjacent transverse members perpendicular to each other. The four transverse members are connected to form the top of the test frame. Similarly, the four transverse members are connected to form the bottom of the test frame. A connector is provided between two adjacent transverse members at the top of the test frame. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector contact the two adjacent transverse members respectively. The connector is fixed to the transverse members by fasteners, such as screws. Preferably, the connector is provided with a through hole, and the transverse members are provided with threaded holes. The fastener passes through the through hole of the connector and is screwed into the threaded hole on the side of the transverse member to fix the top of the test frame.

[0067] A connector is provided between two adjacent transverse members at the bottom of the test frame. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector respectively contact the two adjacent transverse members. The connector is fixed to the transverse members by fasteners, such as screws. Preferably, the connector is provided with a through hole, and the transverse members are provided with threaded holes. The fastener passes through the through hole of the connector and is screwed into the threaded hole on the side of the transverse member to fix the bottom of the test frame.

[0068] The top and bottom of the test frame are supported and connected by longitudinal members. The longitudinal members support the four corners at the top of the test frame.

[0069] The longitudinal member is fixed to its adjacent transverse member by a connector. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector contact the longitudinal member and the transverse member adjacent to the longitudinal member, respectively. The connector is fixed to the longitudinal member and the transverse member by fasteners, such as screws. Preferably, the connector is provided with a through hole, and the transverse member and the longitudinal member are provided with threaded holes. Fasteners pass through the through hole of the connector and are screwed into the threaded holes on the side of the transverse member and the side of the longitudinal member, thereby fixing the longitudinal member to the top of the test frame.

[0070] Preferably, the target plate suspension mechanism includes a slide rail, a guide member, a suspension cable, and a lifting ring.

[0071] The slide rail is connected to the top of the test frame. Preferably, a crossbeam is provided at the top of the test frame, which can move along the top of the test frame to drive the target plate to move perpendicular to the muzzle direction. The crossbeam at the top of the test frame can increase the structural rigidity of the top of the test frame. When suspending the target plate from the top of the test frame by suspension cables, it can increase the straightness of the slide rail.

[0072] Preferably, a sliding guide groove is provided on the inner side of the transverse member at the top of the test frame that is perpendicular to the direction of projectile flight. That is, a guide groove is provided on the inner surface of the transverse member that is opposite to it. Sliding guides are provided at both ends of the crossbeam. The sliding guides at the ends of the crossbeam slide along the sliding guide groove on the side of the transverse member to adjust the horizontal deviation of the target plate center relative to the muzzle.

[0073] Preferably, during the test, the target plate is located inside the test frame, the slide rail is fixed to the top of the test frame, the sliding member slides along the slide rail in the length direction, a hanging ring is provided on the lower surface of the sliding member, the first end of the suspension cable is connected to the hanging ring, the second end of the suspension cable is connected to the target plate, and the center height of the target plate is adjusted by adjusting the length of the suspension cable between the hanging ring and the target plate.

[0074] A positioning plate is installed below the target plate, and the positioning plate is rotatably connected to the positioning plate mounting part to allow the positioning plate to rotate in the horizontal plane. The positioning plate mounting part is fixed to the bottom of the test frame by a telescopic rod. A limit rod is provided on the upper surface of the positioning plate, and the test angle of the target plate during the test is adjusted by the limit rod to conduct target plate penetration resistance tests at different angles. A support member is provided at the bottom of the test frame, and the length direction of the support rod is perpendicular to the length direction of the crossbeam at the top of the test frame. The telescopic rod is connected to the test frame through the support member. The telescopic rod includes an inner rod and an outer rod, with the outer rod sleeved over the inner rod. Adjustment holes are provided on both the inner and outer rods at equal intervals. The distance of the telescopic rod is adjusted by different mating of the adjustment holes on the inner rod and the outer rod, thereby adjusting the height of the positioning plate and the target plate on it. After the height adjustment is completed, fasteners are used to fix it through the adjustment holes. Preferably, two or more fasteners are used for adjustment. The outer rod of the telescopic rod is connected to the support rod at the bottom of the test frame, and the support rod is fixed to the transverse member at the bottom of the test frame, for example, the side of the transverse member, by a connector. The top of the inner rod of the telescopic pole is connected to the mounting part of the positioning plate.

[0075] Preferably, in order to increase the structural stability of the telescopic pole, a support frame is provided on the side of the telescopic pole. The upper crossbar of the support frame is connected to the side of the outer pole of the telescopic pole. A symmetrically arranged connector is provided at the connection between the upper crossbar of the support frame and the outer pole of the telescopic pole. The connector is fixedly connected to the outer pole of the telescopic pole, for example, by fasteners or welding.

[0076] Preferably, the horizontal bar at the bottom of the support frame contacts the vertical bar and is perpendicular to each other. The horizontal bar and vertical bar at the bottom of the support frame are fixed by a connector. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector are fixed to the horizontal bar at the bottom of the support frame and the vertical bar of the support frame. The above-mentioned fixing method can be to use fasteners, such as screws, to fix the connector to the vertical bar and the horizontal bar at the bottom of the support frame. As an alternative, the connector can be welded to the horizontal bar at the bottom of the support frame and the vertical bar of the support frame respectively.

[0077] Preferably, when using fasteners, the connector is provided with a through hole, and the crossbar and longitudinal bar are provided with threaded holes. The fastener passes through the through hole of the connector and is screwed into the threaded hole on the side of the crossbar and the threaded hole on the side of the longitudinal bar, thereby fixing the crossbar at the bottom of the support frame to the longitudinal bar of the support frame.

[0078] The lower crossbar of the support frame contacts the outer pole line of the telescopic rod, and the lower crossbar of the support frame aligns with the outer pole line of the telescopic rod. The fixing surface of the connector is flat, and the two fixing surfaces of the connector are perpendicular to each other. The two fixing surfaces of the connector are fixed to the lower crossbar of the support frame and the outer pole of the telescopic rod. The above fixing method can be achieved by using fasteners, such as screws, to fix the connector to the lower crossbar of the support frame and the outer pole of the telescopic rod. Alternatively, the connector can be welded to both the lower crossbar of the support frame and the outer pole of the telescopic rod.

[0079] Preferably, when using fasteners, the connector is provided with a through hole, and the crossbar at the bottom of the support frame and the outer rod of the telescopic rod are provided with threaded holes. The fastener passes through the through hole of the connector and is screwed into the threaded hole on the side of the crossbar and the threaded hole on the side of the outer rod of the telescopic rod, thereby fixing the crossbar at the bottom of the support frame and the outer rod of the telescopic rod.

[0080] The support frame is provided with a connector on its side to fix the support frame to a preset position at the bottom of the frame, for example, to fix the support frame to the middle of the support rod.

[0081] Preferably, the positioning plate mounting part is connected to the support member through a telescopic rod. When adjusting the center height of the target plate, the length of the telescopic rod needs to be adjusted at the same time to ensure the distance between the positioning plate and the bottom of the target plate, so as to ensure that the limiting mechanism on the positioning plate can effectively limit the target plate.

[0082] The target plate rotation limiting mechanism is used to limit the target plate in a suspended state after the target plate height and angle are adjusted to the set position. It includes a positioning plate, a positioning plate mounting part, and a limiting rod. The positioning plate is located below the target plate and is rotatably connected to the positioning plate mounting part. The positioning plate mounting part is connected to the bottom of the test frame. The positioning plate can rotate relative to the positioning plate mounting part in a horizontal plane. A limiting rod is provided on the positioning plate, and the limiting rod rotates with the positioning plate. A baseline is set on the positioning plate mounting part, and a marking line is set on the positioning plate. Initially, the baseline and the marking line coincide, or the extension of the baseline coincides with the extension of the marking line. During the test, the angle that the target plate needs to rotate through is determined. After the positioning plate rotates, the angle between the marking line on the positioning plate and the baseline on the positioning plate mounting part is the target plate setting angle required for the test. A limiting rod mounting hole is provided on the positioning plate, and the limiting rod is placed in the limiting rod mounting hole. There are four limiting rods and four limiting rod mounting holes, arranged in pairs, forming a target plate accommodating space between the two sets of limiting rods. Preferably, the center of the positioning plate is rotatably connected to the positioning plate mounting part.

[0083] Preferably, the mounting hole for the limiting rod on the positioning plate is a through hole, and a fixing hole is provided on the mounting part of the positioning plate, with each fixing hole corresponding to one of the mounting holes for the limiting rod. The limiting rod passes through the mounting hole and is inserted into the fixing hole. The strength of the limiting rod is much less than the impact force experienced by the target plate during the test. Therefore, if the target plate is impacted, the limiting rod will break, without affecting the movement of the target plate. The fixing hole can also be located at other positions that can position the limiting rod and the positioning plate.

[0084] While rotating, the positioning plate moves relative to the mounting portion of the positioning plate along a length direction parallel to the support rod. Specifically, a groove is provided on the upper surface of the mounting portion of the positioning plate. The direction of the groove is consistent with the length direction of the support rod. A slider is provided on the positioning plate, which can slide along the groove. A cylindrical rotating connector is provided on the upper part of the slider. A through hole is provided in the center of the positioning plate. The positioning plate is fitted onto the cylindrical rotating connector of the slider. This arrangement allows the positioning plate to rotate while simultaneously adjusting the rotation limiting mechanism relative to the horizontal deviation of the muzzle through the sliding of the positioning plate relative to the mounting portion of the positioning plate.

[0085] Furthermore, a walking mechanism is provided at the bottom of the test frame. Preferably, the walking mechanism is a walking wheel, which enables coarse adjustment of the rotation limit mechanism relative to the horizontal deviation of the muzzle.

[0086] Preferably, a hanging ring is provided at the top of the target plate, and the hanging ring is rotatably connected to the top of the target plate. Specifically, a first rotating connecting part is provided at the top of the target plate, and a second rotating connecting part is provided at the bottom of the hanging ring, and the first rotating connecting part and the second rotating connecting part are hinged together.

[0087] Furthermore, the device according to the invention can also include counterweights. Preferably, the counterweights are detachably connected to the target plate, with four counterweights per group, each counterweight having an equal mass. Multiple groups of counterweights of different masses can be set during the test to ensure that penetration tests can be conducted on target plates of different masses and with the same penetration depth. Furthermore, the counterweights are simultaneously located on the top, bottom, and two sides of the target plate. The counterweights are located at the center of their respective surfaces. Preferably, threaded holes are provided at the center of the top, bottom, and two side surfaces of the target plate, and a through hole is provided at the center of the counterweight. When the counterweight needs to be installed, it is screwed into the corresponding threaded holes on the target plate using fasteners.

[0088] According to the counterweight method of the present invention, different mass projectile-to-target ratios can be achieved. That is, without changing the original size and thickness of the target plate, different mass targets can be set so that the force state of the projectile impacting the target plate does not change, and the mechanical force state of the projectile impacting the target plate does not change. In other words, the thickness of the target plate and the force state after penetration do not change significantly. This allows the device to study the change law of the projectile velocity vector under different mass ratios of projectile and target plate. At the same time, the device does not change the thickness of the projectile penetrating the target or the force state.

[0089] According to the present invention, when changing the target plate mass, it is only necessary to superimpose multiple sets of counterweights to effectively achieve any different projectile-target mass ratio, without the need to reproduce the target plate mold.

[0090] The counterweight method according to the present invention can effectively ensure the balance of the target plate under force in all directions.

[0091] More specifically, to ensure the target-to-bullet mass ratio, with the addition of counterweights, the initial target plate mass is preset to m0. When the counterweights are installed onto the target plate using fasteners, the mass of the fastener mounting holes removed from the target plate needs to be pre-removed. Let m1 be the mass of the fastener mounting holes removed from the target plate, and let m be the mass of a single counterweight in each set of counterweights. 2i The mass of the fastener is m3.

[0092] but

[0093] Where i is the i-th set of counterweights, n is the mass ratio of the projectile to the target, and m′ is the mass of the projectile.

[0094] According to another embodiment of the present invention, the target plate is located inside the test frame, the slide rail is fixed to the top of the test frame, and the slider slides along the slide rail in the length direction of the slide rail to ensure the free movement of the target plate after the collision.

[0095] A lifting ring is provided on the lower surface of the sliding member. The first end of the suspension cable passes through the lifting ring and is connected to the suspension cable retraction mechanism. The height of the target plate 8 is adjusted by retracting or extending the suspension cable 7 through the retraction mechanism.

[0096] The launching and retracting mechanism is aligned with the target plate in a straight line, which is perpendicular to the vertical plane containing the crossbeam. The second end of the suspension cable is connected to the target plate, and the center height of the target plate is adjusted by changing the length of the suspension cable between the lifting ring and the target plate. The lifting ring is rotatably connected to the sliding component, and the hanging ring above the target plate is rotatably connected to the target plate.

[0097] Preferably, a crossbeam is provided at the top of the test frame; a slide rail is fixed to the lower surface of the crossbeam to increase the structural strength of the top of the test frame.

[0098] Preferably, a support is provided at the bottom of the test frame, and the positioning plate mounting part is connected to the test frame through the support.

[0099] Preferably, the positioning plate mounting part is connected to the support member via a telescopic rod, so that the height of the positioning plate can be adjusted at the same time as the height of the target plate.

[0100] Preferably, a speed measurement background is set at the rear of the test frame.

[0101] Preferably, the speed measurement background uses a black and white checkerboard pattern with black and white squares evenly spaced.

[0102] Preferably, the target plate is provided with a counterweight, which is detachably connected to the target plate.

[0103] Preferably, the positioning plate is provided with a limit rod mounting hole, and the limit rod is placed in the limit rod mounting hole.

[0104] Preferably, there are four limiting rods and four limiting rod mounting holes, which are arranged in pairs to form a target plate accommodating space between the two sets of limiting rods.

[0105] The test frame is equipped with wheels at the bottom to adjust the position between the center of the target plate and the muzzle. A limiting rod is used to adjust the angle of the target plate during the test, allowing for penetration resistance tests at different angles. Initially, the target plate is located directly above the positioning plate.

[0106] In the target plate penetration resistance testing device of the present invention, the test frame is a frame structure to reduce the weight of the test frame. The frame structure includes multiple rods, which are connected by connectors to form a detachable structure for easy carrying. The rods can also be made of various existing profiles, which are assembled by connectors to form the frame structure, thereby reducing the cost of processing and customization.

[0107] The test frame is equipped with a crossbeam at the top, and a slide rail is connected to the lower surface of the crossbeam to increase the straightness of the slide rail.

[0108] The positioning plate is provided with four rectangularly distributed limiting holes, and four limiting rods are vertically inserted into the corresponding limiting holes. When the target plate is suspended above the positioning plate by the suspension cable and a set gap is maintained between the target plate and the positioning plate, the four limiting rods limit the target plate from the front and rear surfaces respectively, so that the target plate is kept at the current angle position. The front surface of the target plate is the surface facing the projectile.

[0109] The velocity measurement background is set on the test frame behind the target plate to provide a contrast.

[0110] Preferably, the velocity measurement background is set as a black and white checkerboard pattern with evenly spaced black and white squares to increase contrast. Simultaneously, by measuring the number of squares in a selected area of ​​the velocity measurement background within the high-speed camera footage, the distance within that area is determined based on the number of squares, and the time difference between the starting and ending points of the velocity measurement, the velocity of the projectile before and after impact with the target is calculated. This setup ensures the accuracy of the velocity measurement during the experiment. During the experiment, the projectile's direction is parallel to the velocity measurement background.

[0111] Preferably, in order to increase the overall strength of the test frame, all right-angle connections on the test frame are provided with supporting ribs for structural reinforcement.

[0112] Furthermore, preferably, the counterweights are detachably connected to the target plate, with four counterweights per group, and each counterweight within the same group having an equal mass. Multiple groups of counterweights of different masses can be set during the test to ensure that penetration tests can be conducted on target plates of different masses but with the same penetration depth.

[0113] Furthermore, counterweights are simultaneously positioned at the top, bottom, and both sides of the target plate. The counterweights are located at the center of their respective surfaces.

[0114] Preferably, the target plate has threaded holes at the center of its top, bottom, and two sides, and a through hole at the center of the counterweight. When the counterweight needs to be installed, it is screwed into the corresponding threaded holes on the target plate using fasteners. At this time, the fastener at the top of the target plate can be provided with a hanging ring that is rotatably connected to the fastener, and the suspension cable is connected to the hanging ring.

[0115] The above content will be explained below with reference to the accompanying drawings, such as... Figure 1 As shown in the attached figures, the reference numerals for each component are as follows: test frame 1, target plate 8, speed measuring background 3, slide rail, hanging ring, suspension cable 7, telescopic rod 5, positioning plate mounting part 4, positioning plate 6, and limit rod 10.

[0116] The test frame 1 can be a frame structure assembled from profiles, with each profile being detachable and connected to facilitate on-site assembly.

[0117] A crossbeam 2 is provided at the top of the test frame 1; a slide rail is fixedly connected to the lower surface of the crossbeam 2, and a sliding component, such as a slider, is slidably engaged with the slide rail. A lifting ring is installed at the bottom. Preferably, the lifting ring is rotatably connected to the sliding component. The first end of the suspension cable 7 is connected to the target plate 8, and the second end of the suspension cable is connected to the lifting ring; thereby, the target plate 8 is in a suspended state, simulating the test conditions of a free target plate.

[0118] Preferably, a hanging ring is provided at the top of the target plate 8, and the hanging ring is rotatably connected to the top of the target plate 8. Specifically, a first rotating connecting part is provided at the top of the target plate 8, and a second rotating connecting part is provided at the bottom of the hanging ring, and the first rotating connecting part and the second rotating connecting part are hinged together.

[0119] Preferably, the suspension cable 7 is a rigid rope to avoid affecting the penetration test results of the target plate 8.

[0120] The positioning plate mounting part 4 is supported at the bottom of the test frame 1 by the telescopic rod 5.

[0121] The positioning plate mounting part 4 can be a flat plate structure or a rod-shaped structure, such as... Figure 1 As shown, the positioning plate mounting part 4 is a rod-shaped structure.

[0122] A positioning plate 6 is installed above the positioning plate mounting part 4. The positioning plate 6 can rotate in the horizontal plane relative to the positioning plate mounting part 4. The positioning plate 6 is provided with four rectangularly distributed limiting holes, and four limiting rods 10 are vertically inserted into the corresponding limiting holes. When the target plate 8 is suspended above the positioning plate 6 by the suspension cable 7 and a set gap is maintained between the target plate 8 and the positioning plate 6, the four limiting rods 10 limit the target plate 8 from the front and rear surfaces, so that the target plate 8 is kept at the current angle position. At the same time, the suspension state of the target plate 8 is not affected.

[0123] The velocity measurement background 3 is set on the test frame 1 behind the target plate 8, which facilitates the use of a high-speed camera to film the penetration process of the target plate.

[0124] According to the target plate penetration resistance testing device of the present invention, a counterweight 9 is further provided on the target plate 8 to enable the study of target plate penetration problems of different masses and the same penetration depth. Preferably, the target plate 8 is detachably connected to the counterweight 9, with four counterweights 9 in a group. Each counterweight 9 in the same group has an equal mass and is a cube to ensure consistent force distribution. The counterweights 9 are simultaneously provided on the top, bottom, and two sides of the target plate 8. The counterweight 9 is located at the center of its surface. During the test, multiple groups of counterweights 9 with different masses can be set to ensure that target plate penetration resistance tests of different masses and the same penetration depth can be conducted.

[0125] Furthermore, the target plate 8 has a rectangular structure, with counterweights 9 set at the top, bottom, and two sides. Each counterweight 9 is located at the center of its surface, and all four counterweights 9 have the same mass, ensuring that the center of mass of the target plate 8 remains unchanged even after adding counterweights 9. The counterweights 9 are detachably connected to the target plate 8, allowing for the replacement of counterweights 9 with different masses according to experimental requirements. By adjusting the mass of the target plate 8 by adding counterweights 9, penetration tests can be conducted on the target plate with varying mass but constant penetration depth.

[0126] The counterweight 9 is connected to the target plate 8 in the following way: threaded holes for mounting the counterweight 9 are machined at the center of the top, bottom and two sides of the target plate 8. The counterweight 9 is connected to the target plate 8 by a screw in the center of the counterweight 9 that mates with the threaded hole.

[0127] Preferably, the limiting method after the positioning plate 6 rotates relative to the positioning plate mounting part 4 in the horizontal plane is as follows: a locking pin is provided on the upper surface of the positioning plate mounting part 4, and multiple locking holes that cooperate with the locking pin are evenly distributed along the circumference on the lower surface of the positioning plate 6; when the positioning plate 6 is rotated to a set angle, the locking holes on its lower surface cooperate with the locking pin on the upper surface of the positioning plate mounting part 4, thereby realizing the position locking after the angle adjustment.

[0128] The positioning plate mounting part 4 is connected to the support rod via a telescopic rod 5 with telescopic positioning function. The telescopic rod 5 can be used to adjust the height of the positioning plate mounting part 4 and the positioning plate 6 by telescopic movement.

[0129] Furthermore, the installation method of the limiting rods 10 on the positioning plate 6 is as follows: four sets of rectangularly distributed positioning holes are provided on the upper surface of the positioning plate 6, and the area enclosed by the four sets of positioning holes is no larger than the cross-section of the target plate 8; the four sets of limiting rods 10 are vertically inserted into the corresponding positioning holes. For example, the limiting rods 10 are installed by plugging in, which facilitates the replacement of the limiting rods 10. In this example, there are two limiting rods 10 in each set. When the height and angle of the target plate 8 are adjusted to the set position requirements, the four sets of limiting rods 10 are located on the front and rear surfaces of the target plate 8 respectively, thereby keeping the target plate 8 at the current angle.

[0130] Preferably, all right-angle connections on the test frame 1 are provided with supporting ribs for structural reinforcement.

[0131] Furthermore, height-adjustable support feet are provided at the four corners of the bottom of the test frame 1 to adjust the overall height of the test frame.

[0132] The speed measuring background 3 uses a black and white checkerboard cloth with evenly spaced black and white grids. To accommodate the height adjustment of the target plate 8, the left and right sides of the speed measuring background 3 are slidably engaged with the test frame 1, and can slide up and down along the test frame 1 to adjust the height, and lock the position after the height adjustment; this position locking can be achieved by the cooperation of the locking pin and the locking hole.

[0133] Preferably, the support rod is supported on the test frame by the telescopic rod 5, and the fixed plate mounting part 4 can be the support rod. A positioning plate 6 is connected above the support rod. The positioning plate 6 can rotate in the horizontal plane relative to the support rod to accommodate the adjustment of the target plate angle; simultaneously, the positioning plate 6 can be height-adjusted to accommodate the height adjustment of the target plate 8. The positioning plate 6 is provided with two or more limit rods 10. When the target plate 8 is suspended above the positioning plate 6 by the target plate suspension mechanism and a set gap is maintained between them, the limit rods 10 on the positioning plate 6 limit the target plate 8, keeping it in the current angular position. An angle measuring plate is fixed to the support rod. The upper surface of the angle measuring plate is flush with the positioning plate 6, and the angle measuring plate is provided with angle scale lines. The positioning plate 6 is provided with a pointer or reference line for measuring the rotation angle of the angle measuring plate in conjunction with it. The positioning plate 6 is a rotary table with a position locking function located above the support rod. A locking pin is provided on the upper surface of the support rod, and two or more locking holes that mate with the locking pin are distributed circumferentially on the lower surface of the positioning plate 6. When the positioning plate is rotated to a set angle, the locking holes on its lower surface engage with the locking pins on the upper surface of the support rod to lock the position of the positioning plate after the angle adjustment. The lifting ring is slidably engaged with the crossbeam and can slide laterally along the crossbeam to adjust the lateral position of the target plate 8; the support rod is slidably engaged with the telescopic rod 5 and can slide laterally along the telescopic rod 5 to accommodate the adjustment of the lateral position of the target plate 8.

[0134] This embodiment provides a target plate penetration resistance testing device with unidirectional translation and bidirectional rotation. The target plate is suspended for penetration testing, which can obtain the target plate penetration resistance test results more accurately.

[0135] like Figure 1 and Figure 2 As shown, the target plate penetration resistance test device with unidirectional translation and bidirectional rotation includes: test frame 1, target plate 8, target plate suspension mechanism and target plate rotation limiting mechanism.

[0136] The test frame is a support structure for the target plate suspension mechanism and the target plate rotation limiting mechanism;

[0137] One end of the target plate suspension mechanism is connected to the retraction mechanism, and the other end is connected to the target plate 8, so that the target plate 8 is in a suspended state; the height and angle of the target plate 8 are adjustable.

[0138] The target plate rotation limiting mechanism is set at the corresponding position below the target plate 8 on the test frame. It is used to limit the target plate 8. That is, after the height and angle of the target plate 8 are adjusted to the required position, the target plate rotation limiting mechanism limits it without affecting the suspension state of the target plate 8.

[0139] Furthermore, a counterweight 9 is also provided on the target plate 8 to enable research on the penetration problem of target plates of different masses but with the same penetration depth. For example... Figure 3 As shown, the target plate 8 has a rectangular structure, with counterweights 9 disposed on each of its four end faces (top, bottom, left, and right). Each counterweight 9 is located at the center of its respective end face, and all four counterweights 9 have the same mass, ensuring that the center of mass of the target plate 8 remains unchanged after adding counterweights 9. The counterweights 9 are detachably connected to the target plate 8, allowing for the replacement of counterweights 9 with different masses according to experimental requirements. By adjusting the mass of the target plate 9 by adding counterweights 9, penetration tests can be conducted on the target plate with varying mass but constant penetration depth. Preferably, the counterweights 9 are cubic mass blocks.

[0140] Furthermore, such as Figure 2 and Figure 4 As shown, a crossbeam 2 for mounting the target plate suspension mechanism is provided at the top of the test frame 1, and the crossbeam 2 is located at the middle of the top of the test frame 1. A guide rail is provided on the lower end face of the crossbeam 2. The guide rail can be formed by opening a guide rail groove on the lower end face of the crossbeam 1, or the guide rail can be fixed to the lower end face of the crossbeam 2. Here, the guide rail has the same function as a slide rail. A lifting ring is provided on the slider that slides with the guide rail. One end of the suspension cable 7 passes through the lifting ring and is connected to the take-up and release mechanism, and the other end is hooked to the target plate 8. By moving the slider along the guide rail on the crossbeam 2, the lateral position of the target plate 8 is changed; by adjusting the length of the suspension cable 7, the height of the target plate 8 is changed. The take-up and release mechanism can be located at a position far from the test device so that the height of the target plate 8 can be adjusted by remote control of the take-up and release mechanism. The suspension cable 7 is a rigid rope to avoid affecting the penetration test results of the target plate. Figures 2 to 4 The telescopic rod 5 shown is a rectangular frame that is vertically installed on the longitudinal beam at the bottom of the test frame 1; the support rod is slidably installed on the top crossbeam of the telescopic rod 5 by means of a slider, so that the support rod can slide along the top crossbeam of the telescopic rod 5 to adapt to the adjustment of the lateral position of the target plate.

[0141] A positioning plate 6 is connected above the support rod. The positioning plate 6 can adjust its lateral position along with the support rod, and can also rotate 360° relative to the support rod in the horizontal plane to adapt to the adjustment of the angle of the target plate 8. In addition, the positioning plate 6 can also adjust its height to adapt to the adjustment of the height of the target plate 8.

[0142] The positioning plate 6 is equipped with multiple limiting rods 10. When the target plate 8 is suspended above the positioning plate 6 by the target plate suspension mechanism and a set gap is maintained between them, the limiting rods 10 on the positioning plate 6 limit the target plate 8, keeping it at the current angle. The limiting rods 10 must be able to limit the target plate 8 without affecting the penetration test structure of the target plate 8; that is, during the penetration test, the limiting rods 10 should break before the target plate 8.

[0143] Furthermore, the 360° rotation of the positioning plate 6 relative to the support rod in the horizontal plane can be achieved using the following method:

[0144] The positioning plate 6 is a rotating platform with a position locking function set above the support rod. This form enables the positioning plate 6 to be continuously adjusted 360° in the horizontal plane.

[0145] Furthermore, the 360° rotation of the positioning plate 6 relative to the support rod in the horizontal plane can also be achieved using the following methods:

[0146] A locking pin is provided on the upper surface of the support rod, and multiple locking holes that mate with the locking pin are evenly distributed circumferentially on the lower surface of the positioning plate 6. When the positioning plate 6 is rotated to a set angle, the locking holes on its lower surface engage with the locking pin on the upper surface of the support rod, thereby locking the position after the angle adjustment. The positioning plate 6 is provided with a scale for displaying the rotation angle.

[0147] Furthermore, the height adjustment of the positioning plate 6 is achieved as follows:

[0148] The support rod is connected to the support rod via a telescopic rod with telescopic positioning function. The height of the support rod and the positioning plate 6 can be adjusted by the extension and retraction of the telescopic rod.

[0149] Furthermore, the installation method of the limiting rods 10 on the positioning plate 6 is as follows: four sets of rectangularly distributed positioning holes are provided on the upper surface of the positioning plate 6, and the area enclosed by the four sets of positioning holes is no larger than the cross-section of the target plate 8; the four sets of limiting rods 10 are vertically inserted into the corresponding positioning holes (the limiting rods 10 are installed by insertion, which facilitates the replacement of the limiting rods 10). In this example, there are two limiting rods 10 in each set. When the height and angle of the target plate 8 are adjusted to the set position requirements, the four sets of limiting rods 10 are located on the left and right sides of the front and rear end faces of the target plate 8, thereby keeping the target plate 8 at the current angle.

[0150] Furthermore, limiting rod groups with different envelope areas can be set on the positioning plate to accommodate target plates 8 with different interface sizes. To measure the rotation angle of the positioning plate 6, an angle measuring plate is fixed to the support rod. The upper surface of the angle measuring plate is flush with the positioning plate 6, and the angle measuring plate is provided with angle scale lines. The positioning plate 6 is provided with a pointer or reference line for measuring its rotation angle in conjunction with the angle measuring plate.

[0151] Furthermore, the test frame 1 is a frame structure assembled from multiple profiles, and the profiles can be welded or detachably connected (e.g., by screws); preferably, the test frame 1 is a modular frame structure, with detachable connections between the profiles, allowing for on-site assembly. The target plate suspension mechanism and the target plate rotation limiting mechanism are also detachably connected to the test frame 1 for convenient on-site assembly. Support ribs are provided at all right-angle connections on the test frame 1 for structural reinforcement. Furthermore, height-adjustable support feet are provided at the four corners of the bottom of the test frame 1 to adjust the overall height of the test frame. Furthermore, a velocity measuring background 3 is provided on the test frame 1 behind the target plate 8, facilitating the use of a high-speed camera to film the target plate penetration process.

[0152] To accommodate the height adjustment of the target plate 8, the left and right sides of the velocity measuring background 3 are slidably engaged with the test frame 1, allowing it to slide up and down along the test frame 1 for height adjustment, and then lock in position after height adjustment; this position locking can be achieved through the engagement of locking pins and locking holes.

[0153] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A target plate penetration resistance testing device with unidirectional translation and bidirectional rotation, characterized in that, It includes: The test frame, target plate suspension mechanism, and target plate rotation limiting mechanism are included. The target plate is suspended from the test frame by the target plate suspension mechanism, which allows the target plate to be in unidirectional translation and bidirectional rotation by suspension. The center height of the target plate can be adjusted by adjusting the length of the suspension cable in the target plate suspension mechanism. The target plate rotation limiting mechanism is located below the target plate and is used to adjust the test angle of the target plate to conduct penetration resistance tests on the target plate with unidirectional translation and bidirectional rotation at different angles. The target plate rotation limiting mechanism is used to limit the target plate in a suspended state after the target plate height and angle are adjusted to a set position. It includes a positioning plate, a positioning plate mounting part, and a limiting rod. The positioning plate is located below the target plate and is rotatably connected to the positioning plate mounting part, which is connected to the bottom of the test frame. The positioning plate can rotate relative to the positioning plate mounting part in a horizontal plane. A limiting rod is provided on the positioning plate, and the limiting rod rotates with the positioning plate. The limiting rod is used to limit the target plate, keeping it at the current angle position before the test. During the penetration test, if the limiting rod breaks, it will not affect the movement of the target plate. A baseline is set on the positioning plate mounting part, and a marking line is set on the positioning plate. Initially, the baseline and the marking line coincide, or the extension of the baseline coincides with the extension of the marking line. During the test, the angle the target plate needs to rotate through is determined. After the positioning plate rotates, the angle between the marking line on the positioning plate and the baseline on the positioning plate mounting part is the target plate setting angle required for the test. The target plate is equipped with counterweights, which are detachably connected to the target plate to adjust the target-projectile weight ratio. The counterweights are arranged in groups of four, with each counterweight in the same group having an equal mass. The counterweights are simultaneously placed on the top, bottom, and two sides of the target plate to ensure that the target plate experiences consistent forces in all directions upon impact. The counterweights are located at the center of their respective surfaces, so that the center of mass of the target plate remains unchanged after the counterweights are added. During the test, two or more groups of counterweights with different masses are used to conduct penetration resistance tests on target plates of different masses and the same penetration depth. A velocity measurement background is set on the test frame behind the target plate. The velocity measurement background is set as a black and white checkerboard with black and white squares evenly distributed. By measuring the number of squares in the selected area of ​​the velocity measurement background in the high-speed camera, the distance is determined based on the number of squares in the area, and the time difference between the velocity measurement start point and the velocity measurement end point, the velocity of the projectile before and after hitting the target is obtained.

2. The target plate penetration resistance testing device with unidirectional translation and bidirectional rotation as described in claim 1, characterized in that, The test frame is a frame structure, which includes: connectors, transverse members and longitudinal members.

3. The target plate penetration resistance testing device with unidirectional translation and bidirectional rotation as described in claim 2, characterized in that, The target plate suspension mechanism includes: a slide rail, a guide component, a suspension cable, and a lifting ring.

4. The target plate penetration resistance testing device with unidirectional translation and bidirectional rotation as described in claim 3, characterized in that, A crossbeam is installed at the top of the test frame, and a sliding guide at the end of the crossbeam slides along a sliding guide groove on the side of the transverse member to finely adjust the horizontal deviation of the target plate center relative to the muzzle.

5. The target plate penetration resistance testing device with unidirectional translation and bidirectional rotation as described in claim 4, characterized in that, A walking mechanism is set at the bottom of the test frame to achieve coarse adjustment of the rotation limit mechanism relative to the horizontal deviation of the gun muzzle.

6. The target plate penetration resistance testing device with unidirectional translation and bidirectional rotation as described in claim 1, characterized in that, All the counterweights are cubes.

7. The target plate penetration resistance testing device with unidirectional translation and bidirectional rotation as described in claim 1, characterized in that, The counterweight is secured by fasteners.

Images