RU2637725C2 - Detector of radio-controlled explosive devices - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: introduction of the second microwave transmitter with an output power greater than that of the first transmitter into the "non-linear" radar is new in the detector of radio-controlled explosive devices. To ensure electromagnetic compatibility, the carrier frequency of the second microwave transmitter is taken not less than 5% different from the carrier frequency of the microwave transmitter of the portable "nonlinear" radar. The irradiation zone is then moved forward to a safe distance, measured in tens of meters. The detector of radio-controlled explosive devices contains a "nonlinear" radar and an additionally input microwave transmitter the carrier frequency of which is not equal to the carrier frequency of the transmitter of the "nonlinear" radar.

EFFECT: ensuring the safe detection of radio-controlled explosive devices using portable non-linear radar aids.

1 dwg

Description

The invention relates to the field of technical means of combating terrorism and can be used for the safe detection of radio-controlled explosive devices.

Known portable radars of subsurface sounding, designed to detect masked explosive devices [1]. The disadvantage of such devices is the short detection range of 0.5 ... 1-2 m and a large number of false positives from inhomogeneities of the masking layer of soil, vegetation or snow, which reduces the search rate [2].

Known means of detection based on the method of non-linear radar.

These tools are designed for sustainable remote detection of radio-controlled explosive devices at a distance of several meters to 10-12 m [3].

The use of these funds is limited by their low safety. This is due to the possibility of spontaneous undermining of a radio-controlled explosive device under the influence of a sounding microwave signal from this tool.

The technical result of the invention is to provide a safe process for the detection of radio-controlled explosive devices using portable "non-linear" radars.

The technical result achieved is achieved by introducing a second microwave transmitter with an output power greater than the first transmitter into the “nonlinear” radar. To ensure electromagnetic compatibility, the carrier frequency of the second microwave transmitter is taken at least 5% different from the carrier frequency of the microwave transmitter portable "non-linear" radar. The irradiation zone is then moved forward to a safe distance, measured in tens of meters [4].

The drawing (Fig. 1) shows a structural diagram of a detector for radio-controlled explosive devices.

The detector of radio-controlled explosive devices (1) contains a “non-linear” radar (2) and an additionally introduced microwave transmitter (3), the carrier frequency of which is not equal to the carrier frequency of the transmitter “non-linear” radar.

The detector of radio-controlled explosive devices operates as follows.

A radio-controlled explosive device (4), falling into the irradiation zone (5) from a powerful microwave transmitter (3), is detonated at a safe distance from the detector of radio-controlled explosive devices (1), which includes a “non-linear” radar (2). In the absence of detonation, the radio-controlled explosive device (4) will then be detected by a “non-linear” radar, which is part of the detector of radio-controlled explosive devices.

In order to confirm the possibility of obtaining the claimed technical result, a qualitative experiment was performed. Kenwood TK-278 (1) radio station with a makeshift "explosive" trigger connected to the low-frequency output of a radio station 2 × 3 × 8 cm in size was used as a mock-up of a radio-controlled device (RVU). The trigger device used a detector with two KD522 V diodes and electronic key on the transistor KT819V. A low-voltage miniature incandescent bulb from a flashlight served as a simulator of an electric detonator. This RVU model was confidently detected at a distance of 10 ... 12 meters using the NR-90EK Korshun radar (at the 2nd harmonic of the emitted signal.) The output power of the Korshun radar was 180 W (per pulse), the operating frequency was 848 MHz. At the same time, when the Korshun radar was placed at a distance of less than 1 meter from the RVU prototype, its “self-detonation” was observed (the incandescent light came on). However, when using a more powerful microwave radar transmitter of the search engine for non-contact mines (1000 W per pulse and frequency 815 KHz ) there was a "self-explosion" at a larger Due to the difference in operating frequencies, electromagnetic compatibility of the Korshun 2 radar and the INM radar was ensured.

Information sources

1. Issues of subsurface radar. Edited by A.Yu. Grinev. M. "Radio Engineering", 2005, p. 191-195.

2. Raisins and others. Theory and methods of georadar. M. "Mountain Book", 2008, p. 82-105.

3. Scherbakov G.N. Detection of hidden objects. M. "Arbat - Inform", 2004, p. 57-82.

4. Ivlev S.A., Scherbakov G.N. etc. Search and disposal of explosive devices. M. Foundation for Economic Literacy, 1996, p. 4-7.

Claims (1)

 A radio-controlled explosive device detector containing a microwave transmitter and a receiver of harmonics of the emitted signal, characterized in that a second microwave transmitter with an output power greater than that of the first microwave transmitter is inserted into it, and the carrier frequency differs by at least 5% from the carrier frequency of the first the transmitter.

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