RU2479822C1 - Electronic device of ammunition self-destruction - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: electronic device comprises an autonomous source of power supply, connected with a stabilisation circuit containing a parametrical stabiliser on a stabilitron, connected with a working capacitor, which in its turn is connected with a timer circuit and an actuating mechanism arranged in the form of an electronic key. The stabilisation circuit is arranged as double-staged. The first stage includes a parametrical stabiliser and an additional amplifying transistor. The second stage is arranged on a microconsuming integral stabiliser, the outlet of which is connected with the timer circuit, connected with the actuating mechanism via a circuit of output impulse front correction, which is arranged on Schmitt triggers, at the same time the electronic key is a transistor key.

EFFECT: higher reliability of a device of ammunition self-destruction.

1 dwg

Description

 The invention relates to ammunition, and in particular to shells, in the construction of which self-destruction devices are used.

One of the urgent tasks in this technical field is related to ensuring reliable elimination of ammunition in the event of an emergency. There are various schemes of self-destruction devices used in fuses that provide detonation in the event of a fuse failing in a given mode, but their main disadvantage is that they provide a narrow range of parameters for activating electric detonators used in fuses, and are not universal.

So, for example, from the prior art, it is known a self-liquidation device included in the electronic circuit of an ammunition fuse, including an autonomous power source, a timer, a working capacitor, output transistors, a key and an actuator (patent US 6966261, publ. 22.11.05,) .

The disadvantage of this device is the lack of a forced circuit to set it to its original state and the absence of a primary voltage stabilizer, which can lead to the failure of the circuit of the device as a whole, due to the unpredictability of the input voltage.

Also known is another electronic device for the self-destruction of ammunition (patent US 6865989, published on July 24, 2003), partially eliminating the shortcomings of the previous one and taken as a prototype. This device includes an autonomous power source connected to a stabilization circuit containing a parametric stabilizer on a zener diode, connected to a working capacitor, which in turn is connected to a timer circuit and an actuator made in the form of a thyristor electronic key.

The disadvantages of the prototype are:

- lack of a forced installation scheme in the initial state;

- a short delay time for the self-liquidator to operate, an increase in which will lead to a significant increase in power consumption and dimensions of the device, which will dramatically narrow the applicability;

- the lack of a correction circuit for the front of the output pulse also limits the scope of the device;

- the use of a thyristor electronic key reduces the noise immunity of the device to electromagnetic radiation in comparison with, for example, transistor, and therefore limits the possibility of reliable operation.

The technical result of the claimed device is to ensure the universality of the self-liquidation device. The inventive device provides a self-liquidation mode by including in an electronic circuit that controls the main mode, a parallel branch connected to the actuator.

The specified technical result is achieved due to the fact that in the electronic device for the self-destruction of ammunition, which includes an autonomous power supply connected to a stabilization circuit containing a parametric stabilizer on a zener diode, connected to a working capacitor, which in turn is connected to a timer circuit and an actuator made in in the form of an electronic key, the stabilization circuit is made two-stage, the first stage of which includes a parametric stabilizer and an additional amplifier transistor, and the second stage is made on a micro-consuming integrated stabilizer, the output of which is connected to a timer circuit connected to the actuator via the output pulse front correction circuit, which is made on Schmidt triggers, using a transistor switch as an electronic key.

The implementation of a two-stage stabilization scheme provides increased resistance to voltage drops at the output of an autonomous power source, increases thermal stability and provides a constant voltage in the timer circuit, which ensures the required delay time and applies the device to a wide class of ammunition.

The inclusion in the first stage of the stabilization scheme of the amplifying transistor reduces the requirements for the power characteristics of the zener diode parametric stabilizer, and reduces the dimensions of the device.

The execution of the second stage on the micro-consuming integrated stabilizer ensures constant voltage on the timer circuit and stabilization of the delay time reference.

The presence of a correction circuit for the front of the output pulse allows the device to be used for a wide class of fuses.

The implementation of the correction circuit of the front of the output pulse on Schmidt triggers allows us to simplify the circuit, to ensure operation with a large spread in the durations of the input signal, and to ensure a constant duration of the front of the output signal.

Using a transistor switch provides increased noise immunity to all disturbances in the power circuit in the absence of a trigger effect.

The drawing shows a diagram of a self-liquidation device, where:

C1, C2, - capacitors of the timer circuit; C3-C4, C7-C8 - two groups of working capacitors; C5 - additional capacitor of the second stage of the parametric stabilizer; C6 - capacitor of the correction circuit of the front of the output pulse; R1, R2, R3, R4, R7 - resistors of the timer circuit; R5, R6 - resistors of a parametric stabilizer; R8 is the resistor of the output pulse edge correction circuit; R9, R10, R11 - resistors of the input stage of the electronic key; VD1, VD2, VD3, VD4.1, VD4.2 - rectifier diodes; DA2 - integrated micro-consuming stabilizer; VT1, VT3 - timer circuit transistors; VT2 - an additional amplifying transistor of a parametric stabilizer; VT4, VT5.1, VT5.2 - transistors of the input stage of the electronic key; VT6 - transistor of the output stage of the electronic key; D1.1, D1.2 - Schmidt triggers.

An example of a specific implementation of the claimed device can be an electronic self-liquidation device with a time delay of up to 300 s, including an autonomous power source - a magnetoelectric generator (MEG), a parametric stabilizer made on a Zener diode BZX84C10, a resistor R5 (510 Ohms), an additional amplifier transistor VT2 (BC817- 40) and R6 resistor (5.1kOhm). A parametric stabilizer is the first step in a stabilization scheme. The second stage is the DA2 micro-consuming stabilizer (type MC78LC50NTR) and the optional C5 capacitor. The self-liquidation device also includes: three rectifier diodes VD3, VD4.1, VD4.2; two groups of working capacitors C3-C4 and C7-C8 (the first group with a capacity of 100 microfarads, the second - 10 microfarads); timer circuit made on elements - resistors R1, R2, R3, R7 (at 5.1 megohms), R4 (10 megohms), diode VDl (type BAS216), transistors VT1 and VT3 (type BS170F), capacitors C1 and C2 ( 66 μF); the output pulse front correction circuit performed on the elements - 2 Schmidt triggers D1.1, D1.2 (74АС14ТТ R), resistor R8 (100 Ohms), capacitor C6 (4.7 μF); an electronic key consisting of an input stage and made on elements - resistors R9 (100 kOhm), R10 (2 kOhm), R11 (150 kOhm), transistor VT4 (type BS170F), transistor assembly VT5.1, VT 5.2 (IRF5851) and output stage, performed on a transistor VT6 (IRF2407) connected to an electric detonator (ED).

The operation of the claimed device is as follows. After firing and triggering the MEG through an additional transistor VT2 and rectifier diodes VD4.1 and VD4.2, the working group of capacitors C3 and C4 is charged, which provide a timer circuit and a correction circuit for the output pulse front through the DA2 micro-consuming stabilizer. At the same time, voltage is supplied to the input stage of the electronic switch, and at the same time, the second group of capacitors C7-C8 is charged through the rectifier diode VD3, the voltage from which is supplied to the electric motor. The timer circuit works as follows. At the initial time, the capacitor C1 is discharged and the transistor VT1 is in a forced state through the diode VD1, while the transistor VT3 opens through the resistor R4. This state - holding the circuit in forced form is maintained for several seconds until the voltage across capacitor C1 reaches 5 V. After this, the diode VD1 closes and the timer circuit is no longer involved. Since the voltage potential at the drain of the transistor VT3 is 0, the voltage at the output of the trigger D1.2 is also 0, while the transistor VT4 is closed, the transistor VT5.2 is open through the resistor R10 and reliably keeps the transistor VT6 closed. From this moment, the main delay time begins. Through resistors R2, R3 and an open transistor VT3, capacitor C2 starts charging. The duration of the delay time is determined by the ratings of resistors R2, R3 and capacitor C2. With the ratings indicated in the example of a specific implementation of the claimed device, the maximum delay time is 300 s. As the capacitor C2 is charging, the voltage at the gate of the transistor VT1 reaches the opening threshold. Due to the positive feedback through the capacitor C2, the transistor VT1 opens like an avalanche, and VT3 closes. At the same time, a voltage of 5 V is set at the drain of the transistor VT3, and a voltage of log. "1" is set at the input of the trigger D1.1. At the outputs of both flip-flops D1.1 and D1.2, the voltage changes to the opposite, and a voltage of 5 V appears at the output of flip-flop D1.2. Next, the circuit for correcting the front of the output pulse starts working. In this case, the voltage across the capacitor C6 increases with the time constant τ = R8 C6, providing the necessary speed for opening the electronic key. By changing the time constant τ, it is possible to change the duration of the front of the output pulse in a wide range, thereby ensuring the universality of the device.

T.O. Using the inventive self-destruction device, it is possible to create a delay line of a blast pulse for a wide class of explosive devices.

Claims (1)

An electronic device for self-destruction of ammunition, including an autonomous power source, connected to a stabilization circuit containing a parametric stabilizer on a zener diode, connected to a working capacitor, which, in turn, is connected to a timer circuit and an actuator made in the form of an electronic key, characterized in that the stabilization circuit is made two-stage, the first stage of which includes a parametric stabilizer and an additional amplifying transistor, and the second stage is made on a micro-consuming integrated stabilizer, the output of which is connected to a timer circuit connected to the actuator through a correction circuit of the front of the output pulse, which is performed on Schmidt triggers, using a transistor switch as an electronic key.