RU2809321C1 - Remote anti-personnel non-contact explosive device - Google Patents

Abstract

FIELD: explosive devices.

SUBSTANCE: remote anti-personnel non-contact explosive device contains an actuator, a seismic transducer, a preamplifier, a bandpass filter, an amplifier, a rectifier-integrator, an automatic gain controller, and a three-level threshold device installed at the output of the rectifier-integrator connected in series. The low level output of the three-level threshold device is connected to the input of the automatic gain control. The outputs of the high and medium levels of the threshold device are connected to the inputs of the classifier of a moving person's step, which contains a circuit for controlling the rate of increase of the seismic signal envelope, a circuit for controlling the duration of the signal created by the person's step, and a circuit for controlling the duration of the pause between steps. One output of the classifier is connected to the input of a temporary device, which is configured to determine the processing time of signals coming from the seismic transducer, and to the input of the step counter. The second output of the classifier of a moving person's step, configured to control the required duration between two successive steps, and the output of the timing device are connected, respectively, to the first and second inputs of the logical addition circuit. The output of the circuit is connected to the reset input of the step counter. The device additionally contains a wireless communication module configured to receive radio signals to set it in “active mode” and “inactive mode”, a signal delay element, a trigger, and an “AND” logic element circuit. The first output of the wireless communication module, which determines the installation in the “active mode,” is connected through a signal delay element to the trigger reset input and the third input of the logical addition circuit. The second output of the wireless communication module, which determines the setting to the “inactive mode,” is connected to the second input of the trigger, the output of which is connected through an “AND” logic element circuit to the fuse actuator. The second input of the AND gate circuit is connected to the output of the step counter. The output of the AND gate circuit is connected to the input of the wireless communication module to transmit a signal to activate the fuse actuator.

EFFECT: increase of safety and efficiency of using an explosive device due to remote control of its blocking.

1 cl, 1 dwg

Description

The invention relates to seismic anti-personnel non-contact explosive devices used in engineering ammunition for the construction of mine-explosive barriers, namely to remote anti-personnel non-contact explosive devices.

This class of devices with a seismic operating principle is subject to the following requirements: autonomy, small dimensions and weight, strict requirements for mechanical overloads, tightness, automatic installation on the ground using universal mine spreaders, including from helicopters, the device must be installed for a certain period of time and deactivated (neutralize) in accordance with the international safety convention in order to prevent further deaths of civilians when they enter the affected area.

A device known from the prior art is “Seismic energy signal detector” (patent RU 2236026 C1, published on September 10, 2004) designed to detect human movement in a controlled area. The detector contains a bandpass filter, two threshold devices, a delay line and a decision circuit. A decision on the presence of a useful signal is made after the signal repeatedly exceeds the threshold of the threshold device in two adjacent analyzed background samples.

However, this device is not immune to signals generated by shell explosions and small arms fire. In addition, when a person moves, walking, running or crawling, the signal does not fit into the specified interval. The device does not comply with the safety requirements for its use.

The closest analogue to the proposed invention is an anti-personnel non-contact explosive device (patent RU 2623403 (C2), published on June 26, 2017). The anti-personnel non-contact explosive device contains a seismic transducer, a preamplifier, a bandpass filter, an amplifier, a rectifier-integrator, an automatic gain controller and an actuator connected in series. Additionally, it contains a three-level threshold device installed at the output of the rectifier-integrator, while the low level output of the three-level threshold device is connected to the input of the automatic gain controller, and the outputs of the high and middle levels of the threshold device are connected to the inputs of the classifier of the driving person's step, while one output of the classifier is connected to the input of a temporary device, which is configured to determine the processing time of signals arriving from the seismic transducer, and to the input of the number of steps counter, the output of which is connected to the actuator, and the second output of the classifier of the step of a moving person, configured to control the required duration between two successive steps, and the output of the temporary device is connected through a logical addition circuit to the step counter reset input.

This device provides control of the parameters of a person’s steps, has good noise immunity from various types of seismic interference, but does not ensure the safety of its use, increase the possibilities of use, or meet the requirements for the elimination of minefields.

The technical problem to be solved by the present invention is the creation of a remote anti-personnel non-contact explosive device that ensures the safe passage of the controlled zone by “friends” and the possibility of dismantling engineered ammunition.

The technical result consists in increasing the safety and efficiency of using a remote anti-personnel non-contact explosive device due to remote control of its blocking.

The posed technical problem is solved and the technical result is achieved due to the fact that a remote anti-personnel non-contact fuse device containing an actuator, a series-connected seismic transducer, a preamplifier, a bandpass filter, an amplifier, a rectifier-integrator, an automatic gain controller, a three-level threshold device installed at the output of the rectifier -integrator, wherein the low level output of the three-level threshold device is connected to the input of the automatic gain controller, and the outputs of the high and middle levels of the threshold device are connected to the inputs of the moving person’s step classifier, which contains a circuit for controlling the rate of increase of the seismic signal envelope, a circuit for controlling the duration of the signal created by the step person and a circuit for monitoring the duration of the pause between steps, while one output of the classifier is connected to the input of a temporary device, which is configured to determine the processing time of signals arriving from the seismic transducer, and to the input of the counter of the number of steps, and the second output of the step classifier of a moving person, configured to controls the required duration between two successive steps, and the output of the temporary device is connected, respectively, to the first and second inputs of the logical addition circuit, and the output of the circuit is connected to the step counter reset input, additionally containing a wireless communication module configured to receive radio signals to set it to the “active mode” " and "inactive mode", a signal delay element, a trigger, a logical element circuit "AND", while the first output of the wireless communication module, which determines the installation in the "active mode", is connected through a signal delay element to the trigger reset input and the third input of the circuit logical addition, and the second output of the wireless communication module, which determines the installation in the “inactive mode”, is connected to the second input of the trigger, the output of which is connected through the logical element circuit “AND” to the fuse actuator, the second input of the logical element circuit “AND” is connected to the output of the number of steps counter, and the output of the “AND” logic element circuit is connected to the input of the wireless communication module to transmit a signal about the activation of the fuse actuator.

The invention is illustrated by a drawing that shows a block diagram of a remote anti-personnel non-contact explosive device.

A remote anti-personnel non-contact explosive device (RPNVD) contains a series-connected seismic transducer (1), a preamplifier (2), a bandpass filter (3), an amplifier (4), a rectifier-integrator (5), an automatic gain controller (6), and a three-level threshold device ( 7), installed at the output of the rectifier-integrator (5), while the low level output (15) of the three-level threshold device (7) is connected to the automatic gain controller (6). The high level (13) and medium (14) level outputs of the three-level threshold device (7) are connected to the inputs of the moving person's step classifier (8). The first output (16) of the step classifier of a moving person (8) is connected to the input of a temporary device (10), which is configured to determine the processing time of signals coming from the seismic transducer (1), and to the input of the step counter (9). The second output (17) of the moving person's step classifier (8), configured to control the required duration between two successive steps, and the output (18) of the temporary device (10) are connected to the logical addition circuit "OR" (11) connected to the reset input (resetting) the step counter (9).

The step classifier of a moving person (8) contains a circuit for controlling the rate of increase of the seismic signal envelope (19), two inputs of which are connected to the high level (13) and middle (14) level outputs of a three-level threshold device (7), and the output is connected to the first input ( 22) circuits for controlling the duration of the signal created by a person’s step (20). The second input (23) of the circuit for monitoring the duration of the signal created by a human step (20) is connected to the output of the middle level (14) of the three-level threshold device (7), and the output is connected to the first input (24) of the circuit for controlling the duration of the pause between steps (21). The second input (25) of the circuit for controlling the duration of the pause between steps (21) is connected to the high level output (13) of the three-level threshold device (7).

The remote anti-personnel proximity fuse device includes a wireless communication module (26) configured to receive radio signals for setting to “active mode” and “inactive mode”, a signal delay element (27), a trigger (28) and an “AND” gate circuit ( 29), the output of which is connected to the fuse actuator (12) and the input of the wireless communication module (26). A remote wireless communication module (39) is used to transmit radio remote control signals. In this case, one output (31) of the wireless communication module (26) is connected through a signal delay element (27) to the reset input (32) of the trigger (28) and the third input of the logical addition circuit “OR” (11), and the other output (30) the wireless communication module (26) is connected to the installation input (33) of the trigger (28), while the output (36) of the trigger (28) is connected to the first input of the AND logic element circuit (29), and the second input of the AND logic element circuit "(29) is connected to the output of the step counter (9).

A remote anti-personnel proximity fuse device works as follows.

As a result of the activation of the wireless communication module (26) upon receipt of the corresponding radio signal from the remote communication module (39) and its generation of a reset signal to the reset input of the trigger (28) through the signal delay element (27), the “active mode” is established. In this case, from the output (31) of the wireless communication module (26) through the “OR” logical element circuit (11), a reset signal (34) is sent to the step counter (9). The step counter (9) is reset before the trigger (28) is reset. This ensures blocking of random activation signals of the fuse actuator (12) when switching to the “active mode”.

In the “active mode”, the output (36) of the flip-flop (28) is set to a signal corresponding to a logical one, which is supplied to the input of the “AND” logic element circuit (29). When the counter of the number of steps (9) is triggered, a signal appears at the second input (35) of the logic element circuit “AND” (29) and it produces a signal (37) to trigger the fuse actuator (12) connected to it and to the input (38) of the module wireless communication (26), which transmits a radio signal about the activation of the fuse actuator (12) to the communication module (39). The step counter (9) gives a signal when an intruder is detected.

The intruder is detected as follows.

The seismic signal is converted by a seismic receiver (1) into an electrical signal, which is amplified by a preamplifier (2), filtered by a bandpass filter (3), amplified by an amplifier (4) and formed by a rectifier-integrator (5) in the form of a signal envelope, after which it is fed to the input of a three-level threshold devices (7). The low level output signal (15) of the three-level threshold device (7) controls the automatic gain control (6), which allows the amplifier gain (4) to be automatically adjusted. The voltage values of the high level (13) and medium (14) levels of the three-level threshold device (7) are set based on the need to coordinate the response zone and the damage zone of the ammunition that is detonated by this fuse. The human step classifier (8) controls the acceptable parameters of a person's step.

If the signal rise rate control circuit (19) determines that the signal rise rate corresponds to the sign of a signal from a moving person, permission is received to operate the signal duration control circuit (20) created by the person's step. Provided that the duration of the step signal is within a few hundred milliseconds (a sign of a human step signal), the circuit for controlling the duration of the signal created by a human step (20) gives permission to operate the circuit (21) for controlling the duration of the pause between steps (two consecutive signals) .

If the circuit (21) for controlling the duration of the pause between steps based on the output of the average voltage level (14) decides that the signal, based on a combination of three signs, corresponds to a human step, the signal of the first step is recorded in the memory of the step counter (9), and at the same time a temporary device ( 10) for the set time value. After this, a similar qualification of the signs of the second step signal is carried out; if the signs correspond to the signs of a person’s step, the signal (second step) is recorded in the memory of the step counter (9). Provided that during a given time (5 seconds) the set number of steps is recorded in the step counter (9), in this case four steps, the step counter (9) generates an executive command to trigger the fuse actuator (12). If within 5 seconds the memory of the step counter (9) does not receive four signals qualified as a human step, or in at least one case out of three, the duration of the pause between steps does not correspond to the required range, the logical addition circuit “OR” (11) resets step counter (9), the device returns to its original state.

“Inactive mode” is set as a result of the activation of the wireless communication module (26) upon receipt of the corresponding radio signal from the remote communication module (39) and its generation of a signal to the input (33) of the trigger (28), at the output (36) of the trigger (28) logical signal zero, which is supplied to the input of the logical element circuit “AND” (29) and blocks the transmission of signals (37) from the step counter (9) to the fuse actuator (12) and the input (38) of the wireless communication module (26).

Thus, the safety and efficiency of using a remote anti-personnel non-contact explosive device is increased due to remote control of its blocking.

The possibility of dismantling engineered ammunition is determined by the fact that when blocking a remote anti-personnel non-contact fuse, safe access to engineered ammunition is ensured.

Claims (1)

A remote anti-personnel non-contact explosive device containing an actuator, a series-connected seismic transducer, a preamplifier, a bandpass filter, an amplifier, a rectifier-integrator, an automatic gain controller, a three-level threshold device installed at the output of the rectifier-integrator, while the low level output of the three-level threshold device is connected to input of the automatic gain controller, and the outputs of the high and medium levels of the threshold device are connected to the inputs of the moving person’s step classifier, which contains a circuit for controlling the rate of increase of the seismic signal envelope, a circuit for controlling the duration of the signal created by the person’s step, and a circuit for controlling the duration of the pause between steps, with one output the classifier is connected to the input of a temporary device, which is configured to determine the processing time of signals coming from the seismic transducer, and to the input of the number of steps counter, and the second output of the classifier of a moving person's step, configured to control the required duration between two successive steps, and the output of the temporary device are connected respectively, with the first and second inputs of the logical addition circuit, and the output of the circuit is connected to the reset input of the step counter, characterized in that it additionally contains a wireless communication module configured to receive radio signals to set it in “active mode” and “inactive mode”, signal delay element, trigger, logical element circuit "AND", while the first output of the wireless communication module, which determines the installation in the "active mode", is connected through the signal delay element to the reset input of the trigger and the third input of the logical addition circuit, and the second output of the wireless module connection, which determines the installation in the “inactive mode”, is connected to the second input of the trigger, the output of which is connected through the logical element circuit “AND” to the fuse actuator, the second input of the logical element circuit “AND” is connected to the output of the step counter, and the output of the circuit The “AND” logic element is connected to the input of the wireless communication module to transmit a signal about the activation of the fuse actuator.

Images