SE449135B - Electronic projectile fuse regulator - Google Patents

Abstract

The adjustment device comprises a primary piezo-electric component (26), which as the result of the firing of the projectile charges partly a capacitor (4) in an ignition circuit, partly a reservoir capacitor (1,2) and a secondary piezo-electric component (25) acting as stop detector. The reservoir capacitor (1,2) is in a regulating circuit contg. a first electronic current adjuster (20) with a control input connected to the secondary piezo-electric component (25), and a time circuit (3,5) whose output is connected to the control input on an ignition circuit second current adjuster (8). The time circuit (3,5) receives a controlled charging time using a voltage restrictor. A trigger diode (6) makes the second current adjuster (8) conductive when there is a predetermined trigger diode (6) makes the second current adjuster (8) conductive when there is a predetermined voltage level at the time circuit output, so that the ignition capacitor (4) discharges through the fuse (27). (Provisional Basic advised week 83/41)

Description

15 20 25 30 35 449 135 2 .-. ... n-u-.n- »unuuq The present invention is based on sensing the shock wave which is formed during impact on hard targets and has been built up of piezoceramics in both an impact sensor and a current source for an electronic time delay circuit. The invention has for this purpose obtained the features stated in claim 1.

The adjusting device according to the invention can suitably be constructed as a single compact unit with a cylindrical shape. The device has a very low power consumption and can by its construction easily be adapted to be blocked electronically during most of the projectile trajectory in order to be reinforced by an activation signal by, for example, an end-phase control electronics in end-phase controlled projectiles.

An adjusting device according to the invention also has a very long service life, since it completely lacks storage-sensitive circuits.

The invention will be described in more detail below with reference to the accompanying drawing figure, which shows a wiring diagram of a preferred embodiment of the invention.

The present invention utilizes both load changes on a piezoceramic element, i.e. the compression at the projectile acceleration in the barrel and the relief at the barrel mouth, to via a purpose-designed piezoelectric element in the form of a piezoceric-chemical current source 26 and a rectifier 11-14 charge a voltage-limited reservoir capacitor 1, 2, which is intended to drive an electronic timing circuit 3, 5 via a series of recharges. Simultaneously with the reservoir capacitor, charge 2, charge is distributed to an ignition capacitor 4. The ignition capacitor 4 is separated from the possibility of of a diode 9 connected to the igniter tube 30 to ensure sufficient ignition voltage during the entire orbital period of the projectile.

The ignition capacitor 4 can be discharged by a conventional electric igniter 27 by means of an electronic switch in the form of a thyristor 8, to whose control input (control) timing circuit 3, 5 is connected. 10 15 20 25 30 35 449 1.35 a The time circuit is activated by another electronic switch in the form of a thyristor 20, to the control of which a sensor circuit is connected.

The current consumed by the timing circuit 3, 5 is not sufficient to keep a thyristor in a conducting state for the required time. This problem has been solved by distributing the charge of the reservoir capacitor 1, 2 for a short time and thus with sufficient holding current to a second reservoir capacitor Z1 via a current-limiting resistor 23.

The charge of the second reservoir capacitor 21, which is voltage-limited by a zener diode 22, supplies the above-mentioned electronic timing circuit, which consists of a resistor 5 and a capacitor 3. At a calculated time corresponding to the time delay of the switching device, the voltage threshold 8 of the trigger diode 6 is reached conducting by supplying an ignition pulse to the control of the thyristor, whereby the charge of the ignition capacitor 3 is discharged through the electric igniter 27.

The initiation of the time count one thus takes place by means of a pulse from the above-mentioned B P sensor circuit to the control of the thyristor 20.

The sensor circuit consists of a second piezoelectric element in the form of a piezoceramic plate 25, the connections of which are short-circuited by a contact 29 during transport and handling. The contact 29 is opened on the conditions acceleration of sufficient magnitude and subsequent rotation.

The sensitivity level of the sensor ceramics is mechanically balanced by an underlying mass and electrically by a parallel-connected load resistor 26. The rectifier diodes 15, 16 ensure the charging of a capacitor 17 to a level determined by a trigger diode 18, which empties the capacitor charge to the control of the thyristor 20, this becomes leading and the counting of time begins.

The invention is not limited to the embodiment shown and described, but a large number of modifications thereof are conceivable within the scope of the appended claims.

Claims (3)

10 15 20 25 30 449 135 4 PATENT REQUIREMENTS An adjusting device for an electronic projectile purge tube, comprising a first piezoelectric element (26) for charging, as a result of the projectile firing, a firing capacitor (4) included in a igniter for an electric igniter (27) and at least one a switching capacitor (1, 2) comprising a switching circuit, and a second piezoelectric element (25) for initiating the ignition of the ignition capacitor (4) through the cleaning means (27) as a result of the projectile impact, said switching circuit comprising a first electronic switch (20). ), the control input of which is connected to the second piezoelectric element (25), characterized by a timing circuit (3, 5) arranged to be indirectly supplied from the first electronic switch (20) by the voltage to be distributed over the timing circuit (3). , 5) is arranged to be fed into a second reservoir capacitor (21) connected in parallel with the time circuit, which is arranged to be charged by the first switch via the the first reservoir capacitor (1, 2), the output of the time circuit (3, 5) is connected to the control input of a second electronic switch (8) included in the ignition circuit. Switching device according to claim 1, characterized in that a voltage limiting element (22) is connected in parallel with the timing circuit (3, 5) in order to give it a controlled charging time. Switching device according to Claim 1 or 2, characterized in that the output of the timing circuit (3, 5) is connected to the control input of the second switch (8) via a trigger diode (6) which, at a predetermined voltage level on the timing circuit (3, 5), ) output is arranged to activate the second switch (8), so that the ignition capacitor (4) is discharged through the ignition means (27). ..._. <.-.-.- <- ng,; f «q;