KR101105455B1 - lab-Scale Testing apparatus for ballistic Resistance and impact apparatus - Google Patents

Abstract

The present invention can be obtained through the clay shape for the amount of impact acting on the human body due to the amount of impact that is not absorbed by the impacted specimen by installing a clay container, the load cell is installed inside the clay container and the head is applied to the warhead body The present invention relates to a simple ballistic tester and an impactor capable of measuring the amount of impact and the amount of impact not absorbed by the impacted specimen, and which can be tested in the form and material of a warhead to be measured.

A warhead body (110) having an external streamline shape and impacting the impact specimen (600); A hollow portion 123 is formed in the center of the cylindrical shape so that the center bar 170 penetrates and the groove 121 through which the fixing bar 130 penetrates at a position corresponding to each of the plurality of fixing bars 130 is formed. A plurality of guide bars 120; The hollow part 141 is formed in a cylindrical shape, the center bar 170 penetrates, and a plurality of fixing part grooves 142 are formed, so that the fixing bar 130 penetrates the corresponding fixing part grooves 142, respectively. Weight weight 140 is adjustable to increase the impact energy when falling; A head 160 to which the warhead body is coupled; A fixing bar 130 penetrating through the fixing part grooves 142 of the weights 140 corresponding to the elongated cylindrical shapes and penetrating the grooves 121 of the guide bars 120, respectively; And a connecting ring 171 formed in a cylindrical long bar shape to fix the impactor freely falling thereon, and penetrating the hollow portion of the guide bar 120 and the weight 140 and the head below. A shocker including a center bar 170 to which the 160 is coupled is shown.

In addition, a simple ballistic tester capable of measuring the amount of impact applied to the impacted specimen when the warhead collides with the impacted specimen by using the impactor is provided.

Impactor, impact specimen, impact test, motor, warhead, free fall, load cell

Description

Lab-Scale Testing apparatus for ballistic Resistance and impact apparatus}

The present invention relates to a simple bulletproof tester and an impactor, and more specifically, by installing a clay cylinder, a clay shape can be obtained with respect to the amount of impact acting on the human body due to the amount of impact not absorbed by the impact specimen. The present invention relates to a simple ballistic tester and an impactor capable of measuring the amount of impact applied to the warhead body and the amount of impact not absorbed by the impact specimen by installing a load cell inside the head.

Conventionally impact tests can be divided into material property evaluation and actual product evaluation. Material property evaluation is a method of evaluating the impact properties using a specimen of a particular shape in the material and product development stages, using the data obtained here to select materials, determine the shape of the product. In general, Hopkinson bar is used for high strain rate experiments, and Charpy impact tester is mainly used for measuring the amount of impact. In addition, there is an impact tester using dropping heavy materials or using a gas gun. . Detailed descriptions of these test methods are detailed in the KS Test Specification or the American Society for Testing and Materials Handbook.

In addition, the impact test of the actual product is also performed, which is a verification step after the design is completed, and the impact test is performed on the actual product or a part of the product. This is usually done using a drop impact tester or a product specific impact tester. For impact loads, the behavior of the material varies with strain rate and strain.

When using a conventional impact tester in the body armor design, it is not suitable to measure the amount of impact on the bullet or the impact specimen (the body armor) and the amount of impact on the human body by using an object such as a bullet. In addition, the ballistic test methods commonly used are MIL-STD-662, NATO STANAG 2920, and NIJ standards. The apparatus used in this experiment consists of three parts: warhead launcher, warhead velocity measuring device and tester support. However, it was difficult to install and test bulletproof performance easily because of the high cost and most of all safety requirements in the test facility because of the actual bullet. On the other hand, experiments to investigate the relationship between bulletproof performance by studying the tensile, compression, and friction characteristics of the bulletproof fabric itself have been attempted, but the analysis of the impact received by bullets has been difficult to measure using a conventional test apparatus.

The present invention is to solve the above problems, in the present invention by installing a motor inside the head portion of the impactor by rotating the warhead body to reproduce the situation when the actual bullet hit the impact specimen and NIJ IIIA standard The purpose of the present invention is to provide a simple bullet tester and impactor capable of using a free fall method by converting kinetic energy of a bullet into potential energy.

As a technical idea for achieving the above object, in the present invention, a simple bulletproof tester, a guide tube (500) for guiding a moving path of the warhead body (110) falling; A pneumatic compressor 200 for supplying air to the barrel to increase the initial drop speed of the warhead body 110; A barrel (300) for fixing the warhead body (110) and firing the warhead body (110) when pneumatic pressure is applied from the air compressor (200); A clay barrel 400 measuring a clay shape which is a deformation shape due to the amount of impact transmitted to the clay without being absorbed by the impact specimen 600 due to the impact of the warhead body 110; And a ballistic body (110) impacting the impacted specimen (600) by falling in a state where the outside is formed in a streamlined shape and having an initial velocity.

In another embodiment, the simple bullet-proof tester, the guide tube 500 for guiding the movement path of the impactor 100 falling; Clay cylinder 400 for measuring the deformation shape by the impact load transmitted to the impact specimen by the impact of the warhead body (110); And a simple bullet-proof tester is characterized in that it comprises; and a free impact impactor (100).

The impactor 100, the outside is formed in a streamlined shape warhead body 110 for impacting the impact specimen (600); A hollow portion 123 is formed in the center of the cylindrical shape so that the center bar 170 penetrates and the groove 121 through which the fixing bar 130 penetrates at a position corresponding to each of the plurality of fixing bars 130 is formed. A plurality of guide bars 120; The hollow part 141 is formed in a cylindrical shape, the center bar 170 penetrates, and a plurality of fixing part grooves 142 are formed, so that the fixing bar 130 penetrates the corresponding fixing part grooves 142, respectively. Weight weight 140 is adjustable to increase the impact energy when falling; A head 160 to which the warhead body is coupled; A fixing bar 130 penetrating through the fixing part grooves 142 of the weights 140 corresponding to the elongated cylindrical shapes and penetrating the grooves 121 of the guide bars 120, respectively; And a connecting ring 171 formed in a cylindrical long bar shape to fix the impactor freely falling thereon, and penetrating the hollow portion of the guide bar 120 and the weight 140 and the head below. It is preferable to include a; central bar 170 to which the 160 is coupled.

The head 160 may include a motor 161 that is streamlined and rotates the warhead body 110 therein.

The simple bulletproof tester further includes an impact specimen (600) installed under the guide tube (500) colliding with the warhead body (110) falling, and the impact specimen (600) includes a polyamide fiber, It is composed of PE (polyethylene) fiber, PBO (polybenzoxazole) fiber, carbon fiber, glass fiber, ceramic fiber material, fabric, knitted fabric, UD fabric (unidirectional orientation fabric), nonwoven fabric using the material And any form selected from the group consisting of composite materials or composite structures thereof.

The clay container 400 may include a load cell 410 for measuring the amount of impact transmitted to the clay is not absorbed by the impact specimen due to the impact of the warhead body (110).

The simplified bulletproof tester may further include a safety sensor 800 for detecting whether the impact specimen 600 is mounted.

The simplified bulletproof tester may further include a speed sensor 700 installed on the surface of the guide tube 500 and measuring a falling speed of the warhead body 110.

The simplified bulletproof tester 10 may further include a motor 940 for rotating the clay container 400.

The guide bar 120 may form a guide groove 122 to minimize friction with air.

The warhead body 110 may be made of any one material selected from the group consisting of lead, lead alloy, copper, iron, tungsten, and heat treated steel.

The inventors of the present invention have a simple bulletproof tester has the effect of measuring the amount of impact applied to the impact specimen such as the actual body armor by making a warhead body, such as the shape and material of the actual bullet. In addition, by installing a motor inside the head portion of the impactor by rotating the warhead body, there is an effect that can reproduce the situation when the actual bullet hit the impact specimen.

In addition, it is possible to obtain a clay shape with respect to the amount of impact acting on the human body due to the amount of impact that is not absorbed by the impact specimen by installing a clay container.

In addition, by installing a load cell in the interior of the clay barrel and the head there is an effect that can measure the amount of impact applied to the warhead body and the amount of impact not absorbed by the impact specimen.

Conventionally, many experiments could not be carried out due to the high cost of the actual bullet test, but the present invention has an effect that many repeated tests are possible while being inexpensive. In addition, low-speed, high-speed impact test is possible, and the impact shape (energy) can be adjusted by varying the position and number of weights as well as the shape and material of the bullet.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations of embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view of a first embodiment of the present inventors bulletproof tester. The first embodiment is an example of use when the impactor is freely dropped. The first embodiment shown in FIG. 1 includes a guide tube 500, an impact specimen 600, a clay container 400, and an impactor 100.

Figure 2 is a side view of a second embodiment of the present inventors bulletproof tester. The second embodiment is an example of use when the warhead body is coupled to the barrel and fired. The second embodiment shown in FIG. 2 includes a guide tube 500, a pneumatic compressor 200, a barrel 300, an impact specimen 600, a clay container 400, and a warhead body 110. The second embodiment includes a pneumatic compressor 200 and a barrel 300 to launch the warhead body 110.

Hereinafter, the configuration of the first embodiment and the second embodiment will be described in detail. The guide tube 500 guides the movement path of the impactor 100 falling. The guide tube 500 has a cylindrical shape and a hollow portion 510, which is a passage through which the impactor 100 passes, has a cylindrical shape and a hollow cylindrical shape.

The air compressor 200 supplies air to the barrel to increase the initial drop speed of the warhead body 110 constituting the impactor 100. The barrel 300 fixes the warhead body 110 and launches the warhead body 110 when pneumatic pressure is applied from the air compressor 200. The impact specimen 600 collides with the warhead body 110 falling and is installed under the guide tube 500. The impact specimen 600 is made of polyaramid fiber, PE (polyethylene) fiber, PBO (polybenzoxazole) fiber, carbon fiber, glass fiber, ceramic fiber material. Preferably, it can be woven in the form of any one type selected from the group consisting of woven fabric, knitted fabric, UD fabric (unidirectional oriented fabric), non-woven fabric and composite materials using the material. have.

The clay container 400 measures the clay shape which is deformed by the amount of impact transmitted to the clay (mud) 420 is not absorbed by the impact specimen 600 due to the impact of the warhead body (110). Preferably, the clay container 400 may include a load cell 410 for measuring the amount of impact transmitted to the clay (mud) is not absorbed by the impact specimen due to the impact of the warhead body (110). In addition, the lower portion of the clay container 400, the motor 940 is installed so that when the motor 940 rotates the impact specimen 600 coupled to the clay container 400 and the clay container 400 also rotates do. In this way, the actual impact of the bullet on the impacted specimen can be reproduced closely. The impactor 100 includes a warhead body 110 in the lower portion and collides with the impact specimen 600.

In addition, the simple bulletproof tester is installed on the surface of the safety sensor 800 and the guide tube 500 to detect whether the impact specimen 600 is mounted, the speed sensor for measuring the falling speed of the warhead body 110 ( 700 may be further included.

When constructing a simple ballistic tester using only the warhead body 110 is provided with the pneumatic 200, the barrel 300, the warhead body 110 is inserted into the barrel 300 has an initial state You can also drop in the state. However, when the free fall using the impactor 100, the connection ring 171 on the upper portion of the center bar 170 without the pneumatics 200 and the barrel 300 is installed on the upper portion of the support 900. The plate 920 is connected to a wire 930 made of a steel-like material.

In addition, the simplified bulletproof tester 10 may include a support 900 and a support 910 to support the components. The support 900 is installed on the side of the guide tube 500. The support 900 may be a rectangular pillar or may be configured as a thin plate. The support 910 serves to support and support the support 900. The support 910 is coupled using thin plates and long cylindrical rods. The support 910 may be variously modified as long as it supports the support 900.

Hereinafter, the impactor 100 will be described in detail. 3 is a perspective view of an impactor according to the present invention. Figure 4 is an exploded perspective view of the impactor of the present invention. 5 is a cross-sectional view of the impactor of the present invention. 3 to 5, the impactor 100 includes a warhead body 110, a guide bar 120, a weight 140, a fixing bar 130, a head 160, a center bar ( 170). The warhead body 110 is formed in a streamlined shape outside and impacts the impact specimen 600. The warhead body 110 is installed below the head 160. The warhead body 110 is preferably manufactured in the shape of a bullet that impacts a material such as a body armor which is the actual impact specimen 600. The material of the warhead body 110 may be made of any one selected from the group consisting of lead, lead alloy, copper, iron, tungsten, and heat-treated steel, which are frequently used in bullets to reproduce an actual situation such as a bullet.

The guide bar 120 has a hollow portion 123 formed in the center of the cylindrical shape through which the center bar 170 penetrates and the fixing bar 130 passes through positions corresponding to the plurality of fixing bars 130, respectively. Groove 121 is formed. The guide bar 120 is preferably a plurality of installed. The shape of the guide bar 120 is to make a plurality of guide grooves 122 in the cylindrical shape in order to minimize the friction of air.

The weight 140 has a hollow portion 141 is formed in a cylindrical shape, the center bar 170 penetrates and a plurality of fixing portion grooves 142 are formed to be fixed to the corresponding fixing portion grooves 142, respectively. Bar 130 penetrates. The weight 140 serves to adjust the weight in order to increase the impact energy when falling. The head 160 is streamlined and the warhead body 110 is coupled to the bottom. Preferably, the head 160 may include a load cell 111 for measuring the impact applied to the warhead body therein and a motor 161 for rotating the warhead body 110. The warhead body 110 is rotated by the rotation of the motor 161, so that bullets can be blown onto the material such as the body armor corresponding to the impact specimen 600, and the conditions can be made and tested. have. A groove 162 to which the fixing bar 130 is coupled is formed on the top surface of the head 160.

The fixing bar 130 penetrates the fixing part grooves 142 of the weights 140 respectively corresponding to the elongated cylindrical shape. The fixing bars 130 penetrate the grooves 121 of the guide bars 120, respectively. The center bar 170 is formed in a cylindrical long bar shape is formed with a connecting ring 171 for fixing the impactor to freely drop the impactor on the top. The center bar 170 penetrates through the hollow portion of the guide bar 120 and the weight 140 and the head 160 is coupled to the lower portion.

Hereinafter will be described a state of use of the experiment using the simplified bulletproof tester. 6 shows a state before the impactor 100 collides with the impacted specimen 600 when the impactor is freely dropped in the first embodiment of the present inventors bulletproof tester. 7 shows a state after the impactor collides with the impacted specimen when the impactor is freely dropped in the first embodiment of the present inventors bulletproof tester. FIG. 8 shows the state of the clay bucket after the impactor collides with the impacted specimen when the impactor is freely dropped in the first embodiment of the present inventors bulletproof tester. As illustrated in FIGS. 6 to 8, the simple bulletproof tester freely drops the impactor to measure the amount of impact applied to the impacted specimen and the amount of impact not absorbed by the impacted specimen 600 through the load cell. In addition, in order to reproduce when the actual bullet hit the impact specimen 600, a motor 161 is installed inside the head 160 to rotate the warhead body 110 or the motor 940 under the clay barrel 400. ) To rotate the impact specimen (600) and clay container (400). As shown in FIG. 8, after impacting the impacted specimen, deformation is applied to the impacted specimen. At this time, the degree of deformation of the impacted specimen is measured using height (h) and width (w). The smaller the height and width measured here, the smaller the impact delivered to the human body.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art may implement the present invention in other specific forms without changing the technical spirit or essential features of the present invention. You will understand that. Accordingly, the embodiments described above are exemplary in all respects and not restrictive.

The inventors of the present bulletproof tester can measure the impact amount applied to the impact specimen such as the actual body armor by making a warhead body like the shape and material of the bullet, and also install a motor inside the head of the impactor. By rotating it can reproduce the situation when the actual bullet hits the impacted specimen and can be used industrially.

1 is a side view of a first embodiment of the present inventors bulletproof tester.

Figure 2 is a side view of a second embodiment of the present inventors bulletproof tester.

3 is a perspective view of an impactor according to the present invention.

Figure 4 is an exploded perspective view of the impactor of the present invention.

5 is a cross-sectional view of the impactor of the present invention.

FIG. 6 shows a state before the impactor collides with the impacted specimen when the impactor is freely dropped in the first embodiment of the present inventors bulletproof tester.

7 shows a state after the impactor collides with the impacted specimen when the impactor is freely dropped in the first embodiment of the present inventors bulletproof tester.

FIG. 8 shows the state of the clay bucket after the impactor collides with the impacted specimen when the impactor is freely dropped in the first embodiment of the present inventors bulletproof tester.

<Description of Major Symbols in Drawing>

10: simple bulletproof tester

100: shocker

110: warhead body

120: guide bar

122: guide groove

130: fixed bar

140: weight

142: fixed bar groove

160: head

170: center bar

171: link

200: pneumatic

300: barrel

400: clay bucket

420: clay

500: guide tube

600: impact specimen

700: speed sensor

800: safety sensor

900: support

910 support

920: Plate

930: wire

123, 141, 510: hollow part

111, 410: Load cell

121, 162: home

161, 940: motor

Claims (15)

In the simple bulletproof tester, A guide tube for guiding a moving path of the falling warhead body; A compressor for supplying air to the barrel to increase the initial drop rate of the warhead body; A barrel which fixes the warhead body and fires the warhead body when pneumatic pressure is applied from the air compressor; A clay container for measuring a clay shape that is deformed by the amount of impact transmitted to the clay without being absorbed by the impact specimen by the impact of the warhead body; And And a warhead body that is formed in a streamlined shape outside and falls in a state where the initial velocity is present, thereby impacting the impacted specimen. In the simple bulletproof tester, A guide tube for guiding a moving path of the dropping impactor; An impact specimen installed under the guide tube and impacting the falling warhead body; A clay container measuring a deformation shape due to an impact load transmitted to the impact specimen by the impact of the warhead body; And Simple bulletproof tester comprising a; free dropping impactor. 3. The method of claim 2, The impactor, A warhead body having an external streamline shape and impacting the impact specimen; A plurality of guide bars having a hollow portion formed in the center of the cylindrical shape and having a groove through which the center bar penetrates and the fixing bar penetrates at a position corresponding to each of the plurality of fixing bars; A hollow weight is formed in a cylindrical shape, the center bar penetrates and a plurality of fixing part grooves are formed so that the weight bars can be adjusted to increase the impact energy when the fixing bars penetrate the corresponding fixing part grooves and fall; A head to which the warhead body is coupled; A fixing bar penetrating the fixing part grooves of the weights corresponding to the shape of the long cylindrical shape and penetrating the grooves of the corresponding guide bars, respectively; And It is formed in the shape of a cylindrical long bar is formed in the upper connection ring for fixing to freely drop the impactor, the center bar penetrating the hollow portion of the guide bar and the weight and the head coupled to the lower; The simple bulletproof tester described above. The method of claim 3, The head is The simple bullet-proof tester characterized in that the streamlined and comprises a motor for rotating the warhead body therein. The method according to any one of claims 1 to 4, The impact specimen is Polyaramid fiber, PE (polyethylene) fiber, PBO (polybenzoxazole) fiber, carbon fiber, glass fiber, ceramic fiber material, The simple bulletproof tester, characterized in that any one form selected from the group consisting of woven fabric, knitted fabric, UD fabric (unidirectional orientated fabric), non-woven fabric and composite materials using the material. The method according to any one of claims 1, 3, and 4, The clay container, And a load cell measuring an impact amount transmitted to clay without being absorbed by the impact specimen by the impact of the warhead body. The method according to any one of claims 1, 3, and 4, The simple bulletproof tester, The simple bulletproof tester further comprises a safety sensor for detecting whether the impact specimen is mounted. The method according to any one of claims 1, 3, and 4, The simple bulletproof tester, And the speed sensor installed on the surface of the guide tube and measuring a falling speed of the warhead body. The method according to any one of claims 1 to 4, The simple bulletproof tester, The simple bulletproof tester further comprises a motor for rotating the clay barrel. The method of claim 3, The guide bar, The simple bulletproof tester, characterized in that the guide groove is formed to minimize friction with air. The method according to any one of claims 1, 3 or 4, The warhead body, The simple bulletproof tester, characterized in that made of any one material selected from the group consisting of lead, lead alloy, copper, iron, tungsten, heat-treated steel. In the impactor installed in the simple bulletproof tester, A warhead body formed outside with a streamlined shape and impacting the impacted specimen; A plurality of guide bars having a hollow portion formed in the center of the cylindrical shape and having a groove through which the center bar penetrates and the fixing bar penetrates at a position corresponding to each of the plurality of fixing bars; A hollow portion formed in a cylindrical shape, a center bar penetrating and a plurality of fixing part grooves formed therein, the weight bars for increasing the weight to reduce resistance of air when the fixing bars penetrate through the corresponding fixing part grooves and fall; A head to which the warhead body is coupled; A fixing bar penetrating the fixing part grooves of the weights corresponding to the shape of the long cylindrical shape and penetrating the grooves of the corresponding guide bars, respectively; And It is formed in the shape of a cylindrical long bar is formed in the upper connection ring for fixing to freely drop the impactor, the center bar penetrating the hollow portion of the guide bar and the weight and the head coupled to the lower; Shocker made with. The method of claim 12, The head is a streamlined, the impactor characterized in that it comprises a motor for rotating the warhead body therein. The method of claim 12, The warhead body, And a load cell installed inside the head to measure an impact applied to the warhead body. The method of claim 12, The warhead body, The impactor, characterized in that made of any one material selected from the group consisting of lead, lead alloy, copper, iron, tungsten, heat-treated steel.

Images