DE10018489C2 - Projectile that can be fired from a barrel weapon - Google Patents

Description

The invention relates to a projectile that can be fired from a barrel weapon according to the remarks paint the preamble of claim 1.

In the case of explosive projectiles, there is usually an unintentional actuation of the detonator achieved by two independent mechanical fuses. To Be These safeguards are often used or canceled the acceleration acting on the projectile and that due to the swirl on the Ge acting centrifugal force. If the projectiles from a weapon with a Smooth tube can be shot, however, occurs with the centrifugal force-dependent fuses or safety systems only take effect if during the flight phase of Ge a certain twist (e.g. by adjusting the stabilizing wing) was present is.

From DE 27 46 599 C2 a projectile that can be fired from a barrel weapon is known comprises a piezoelectric pressure sensor arranged in the region of the floor tail. When the projectile is shot down, the gas pressure acting on the projectile rear is determined by means of a first pressure plate on the piezoelek supported on a second pressure plate trical element of the pressure sensor transmitted and generated depending on the pressure change  a tension. This then acts on the igniter via transmission elements activating device.

The disadvantage of this known projectile with a piezoelectric pressure sensor other that the piezoelectric element is relatively expensive between two printing plates must be stored. In addition, the first printing plate must pass through one of the printing plates spaced cover plate are protected.

From DE 28 47 548 C2 a projectile with a piezoelectric pressure sensor is known which the first pressure plate is designed as a rupture disc. When the gas rises pressure, the rupture plate is destroyed and the resulting vibration of the Floor creates a shock wave that excites the piezoelectric element. The voltage generated in this way is then passed on via an electronic memory circuit leads. This floor is also relatively complex.

The invention has for its object a Ge from a barrel weapon shot with a simple safety system to indicate that the Ab Shot in the gun barrel on the projectile gas pressure of the propellant gases for the Unlatching of the igniter exploited.

This object is achieved by the features of claim 1. width re, particularly advantageous embodiments of the invention disclose the dependent claims.

The invention is essentially based on the idea that the piezoelectric Ele ment of the sensor when firing the projectile directly from the gas pressure of the propellant dung gases is applied. A second abutment is preferably not used as the abutment Pressure plate, but the bullet tail itself used.

The arrangement of the piezoelectric element on the back of the projectile can simple way with large caliber ammunition a large area and thus a large energy The yield of the piezoelectric element can be ensured. After the one time Large-area deformation of the piezoelectric element has fulfilled its function  and can during the further pipe passage and / or after leaving the raw res be destroyed.

The device activating the detonator can be, for example, an electrical device act trical switch.

It has proven to be advantageous if a piezokerami is used as the piezoelectric element cal foil is used. The film can contain several piezoelectric ceramics elements include.

Further details and advantages of the invention will become apparent from the following a figure illustrated embodiment.

In the figure, the longitudinal section of the rear part of a ver firable from a barrel weapon, schematically indicated projectile 1 is shown, which contains a Sprengla extension 2 and a detonator 3 for igniting the explosive charge 2 .

On the outer surface 4 of the tail 5 , a piezoelectric element 6 is fixed in an open recess 7 , so that the element 6 when the projectile ses 1 is hit directly by the propellant gases coming from the direction of arrows 8 is struck. On its side facing the projectile 1 , the piezoelectric element 6 is supported on the projectile tail 5 .

After the projectile 1 has been fired, a corresponding voltage is generated by the piezoelectric element 6 due to the strong rise in pressure of the propellant gases, which voltage is supplied to an electronic circuit 12 via the electrical lines 10 , 11 . When a threshold value is exceeded, the igniter 3 is then unlocked by a corresponding signal generated by the circuit.

The invention is of course not based on the embodiment described above example limited. For example, the piezoelectric element can consist of several piezoceramic elements. The piezoelectric element needs  not be arranged in the middle area on the rear of the projectile, but can, depending on the available space - can also be arranged in a circular shape, for example. In addition, ver on the recess for receiving the piezoelectric element be dispensed with, if relatively thin-walled (foil-shaped) piezoelectric elements be used.  

LIST OF REFERENCE NUMBERS

1

Bullets

2

explosive charge

3

fuze

4

surface

5

bullet base

6

piezoelectric element

7

recess

8th

arrow

9

page

10

.

11

electrical cables, transmission elements

12

electronic circuit, device, transmission element

Claims (3)

1. From a barrel weapon projectile projectile ( 1 ) with a detonator ( 3 ) and in the region of the rear end ( 5 ) arranged, at least one piezoelectric element ( 6 ) comprising pressure sensor, which acts on the rear end of the projectile ( 5 ) gas pressure generates a voltage, which acts via transmission elements ( 10 , 11 , 12 ) on a device ( 12 ) activating the igniter ( 3 ), characterized in that the piezoelectric element ( 6 ) of the pressure sensor on the outer surface ( 4 ) of the projectile rear ( 5 ) is arranged so that the piezoelectric element ( 6 ) when the projectile ( 1 ) is fired is acted upon directly by the propellant gases. 2. Projectile according to claim 1, characterized in that the piezoelectric element ( 6 ) is fastened in a recess ( 7 ) of the projectile rear ( 5 ) which is open at the rear. 3. Projectile according to claim 1 or 2, characterized in that the pie zoelectric element ( 6 ) is a piezoceramic film.