SE522191C2 - Armored vehicle capable of handling range of different attack kinetic energy projectiles and RSV radiation units and uses electromagnetic armoring comprising two connecting parallel plates with intermediate space - Google Patents

Abstract

The armored vehicle is capable of handling a range of different kinetic energy projectile and RSV radiation units and uses electro-magnetic armoring comprising two conductive parallel plates (2,3) with an intermediate space (8). The front and inner plate are connected to a voltage source, e.g. a capacitor (8). When a projectile penetrates both plates, the electrical circuit (7) is closed. A high current (1) passes through the projectile and produces a magnetic-mechanical instability, which leads to a puckering (10) of the projectile.

Description

20 25 30 35 522 191 2 high voltage capacitance. When a projectile has penetrated both plates, the electrical circuit closes. A high current passes through the projectile and causes magnetomechanical instability which leads to narrowing of the projectile and greatly reduced continued ability to cause damage. Examples of this type of EM armor are shown in DE 40 34 401 A1.

A second type of EM armor also consists of two plates connected to a charged capacitor unit. But instead of a large space with air as above, an insulating layer is used between the plates. When a projectile has penetrated both plates, the current pulse between the plates causes a strong expansion of the insulating layer, which throws away the outer plate and thus disturbs the symmetry around the projectile in the same way as in reactive armor. Examples of this type of EM armor are shown in RU 2064651 C1.

A third type of EM armor uses electromagnetic energy to accelerate an armor plate against an incoming projectile using electromagnets. This type of EM armor needs some form of sensor that detects incoming projectiles and a control unit that can decide which armor panel to activate. Examples of this type are shown in patents GB 2,329,234 A and DE 42 44 546 A1.

Finally, there are ideas about EM armor based on electromagnetic fields that affect an incoming projectile without any physical contact with the projectile. The present invention relates to EM armor by type. An advantage of this type of EM armor is the ability to reuse the armor after a hit. When a panel of EM armor is hit, there are holes in the panel and the power is discharged, but the panel only needs to be recharged to be able to be used again.

A disadvantage of this type of armor, however, is that the front part of a projectile is traversed by current for a very short time. The circuit only closes when the tip of the projectile reaches the inner plate and shortly afterwards the tip has passed through the plate. During this short time, the magnetomechanical forces do not have time to actuate the tip. In order to be able to affect the front part of the projectile as well, it is required that the circuit is closed before the projectile tip reaches the inner plate. 10 15 20 25 30 35 522 191 3 A solution to the problem is to use fl more than two plates, e.g. three plates with voltage across plates one and two and two and three, respectively. This results in the projectile being affected in two steps, however, the tip is not affected for a much longer time at the same time as the construction becomes more complicated. Another idea is to design the space between the plates in a suitable way to more quickly close the circuit and conduct current through the projectile. But this has so far not been resolved satisfactorily.

However, the present invention provides a solution to this problem in that the EM armor is designed as claimed in claim 1. Suitable embodiments appear from the following dependent claims.

The invention will be described in more detail in the following in connection with the accompanying clocks: Fig. 1 shows an electromagnetic armor according to the prior art.

Fig. 2 shows the function of a known electromagnetic armor.

Fig. 3 shows an electromagnetic armor according to a first example.

Fig. 4 shows an electromagnetic armor according to a second example.

Figure 1 shows an electromagnetic armor consisting of two parallel metal plates (2, 3) with a gap (8). The front plate (2) is connected to ground (5) and the inner plate (3) is connected to a charged capacitor assembly (6), The electromagnetic (EM) armor is mounted on top of a main armor (4). It is also conceivable to mount EC armor on ships, aircraft or unarmored vehicles. The figure also contains a threat, e.g. KE projectile or RSV beam, which in the description is collected under one and the same name, a projectile (1). Figure 2 shows how the projectile (1) penetrated the two plates (2, 3) and closes the circuit (7). A current (1) passes from the capacitor assembly (6) to the front plate (2) through the projectile (1) further through the inner plate (3) and back to the capacitor assembly (6). When the current (1) passes through the projectile (1), a magnetic field (B) is generated around the projectile (1). The magnetic field (B) exerts a magnetic pressure on the projectile (1) and if this pressure is high enough the projectile material plasticizes and magnetomechanical instability occurs, e.g. narrowing of the projectile in a plurality of places (10), or curvature of the projectile (1) via a force symmetry (F). The basic principle of the invention is that on the inner plate (3) a bearing (11) is arranged which, unaffected, is a poor electrical conductor and can prevent overlap between the plates (2, 3). When the bearing (11) is actuated by a projectile (1), on the other hand, it has a good electrical conductivity and can close the circuit outer plate (2) -projectile (1) - bearing (11) inner plate (3) before the tip of the projectile reaches the inner plate ( 3). The bearing (11) can e.g. comprise a material which, by compression and shock wave, forms a conductive channel (12), according to embodiment one, or a conductive plasma (22), according to a second embodiment, between the projectile tip and the inner plate (3).

Figure 3 shows the first embodiment of the invention. The inner plate (3) is covered with a layer (11) of a material which is initially a bad electrical conductor. When a projectile (1) penetrates the front plate (2), hits the bearing (11) and through a shock wave compresses the material in the bearing (11) it gets a good electrical conductivity. Materials which are suitable for arranging on the plate (3) are e.g. semiconductor material (eg Si), cesium iodide (Csl) or aluminum powder. When a plate (3) covered with a layer (11) of any of these materials is hit by a projectile (1), a shock wave arises in the material which forms a wide conductive channel (12) up to the plate (3).

Figure 4 shows a second embodiment of the invention. The inner plate (3) is provided with a layer (11) comprising metal wires (21) distributed over the surface of the plate, optionally embedded in an insulating dielectric (23). When the projectile (1) hits one of the wires (21), the circuit (7) closes and the projectile (1) begins to be subjected to magnetomechanical action. Initially, the wire (21) will conduct the current (1), but the wire (21) melts and evaporates rapidly to form a plasma (22) which continues to conduct the current (I) until the projectile (1) hits the inner plate (3). .

In Figures 2-4 and the accompanying description, it is the front plate (2) that is connected to voltage and the inner plate (3) that is connected to earth. There are advantages to this arrangement, but it is also possible to connect voltage and earth as in figure 1, which from a safety point of view is preferable.

Claims (10)

10 15 20 25 30 35 522 191 5 PATENT REQUIREMENTS Electromagnetic armor comprising two parallel metal plates, a front plate (2) and an inner plate (3), a gap (8) between the plates (2, 3), and an electrical voltage source, e.g. a capacitor assembly (6), which produces a voltage difference between the plates (2, 3), characterized in that a bearing (11) is arranged which, by actuating a projectile (1), becomes conductive in an area ( 12, 22) between the projectile (1) and the inner plate (3). Electromagnetic armor according to claim 1, characterized in that the conductive region (12, 22) closes a circuit (7) comprising voltage source, front plate (2), inner plate (3) and projectile (1), before the projectile ( 1) hit the inner plate (3) - Electromagnetic armor according to one of Claims 1 to 2, characterized in that the bearing (11) is unaffected by the projectile (1) and is a poor electrical conductor. Electromagnetic armor according to one of Claims 1 to 3, characterized in that the bearing (11) is arranged on the inner plate (3) and without contact with the front plate (2). Electromagnetic armor according to one of Claims 1 to 4, characterized in that the bearing (11) has a good electrical conductivity when it is actuated by the projectile (1) by forming a conductive channel (12). Electromagnetic armor according to claim 5, characterized in that the bearing (11) comprises a semiconductor, a cesium iodide or aluminum powder. Electromagnetic armor according to one of Claims 1 to 4, characterized in that the bearing (11) has a good electrical conductivity when it is actuated by the projectile (1) by forming a conductive plasma (22). Electromagnetic armor according to claim 7, characterized in that the bearing (11) comprises metal wires (21). 522 191 6 Electromagnetic armor according to claim 8, characterized in that the metal wires (21) are embedded in an insulating dielectric (22). Electromagnetic armor according to one of Claims 8 to 9, characterized in that the metal wires (21) are in contact with the inner plate (3) -