RU202371U1 - Device for the disposal of radio-controlled explosive devices contained in carry-on baggage - Google Patents

Abstract

The utility model relates to the field of combating terrorism by technical means, in particular to the neutralization of radio-controlled explosive devices, to ensure transport security, public safety, etc. The device for neutralizing radio-controlled explosive devices contained in hand luggage contains a closed case with an internal cavity, equipped with an electromagnetic emitter installed at the top of the inner cavity. At the same time, on the top of the housing, on the outside, there is a receiving antenna with a control device connected to an electromagnetic microwave emitter, made with the ability to remotely turn on and control the microwave emitter, in addition, a shielding material is used as a body material, made with the possibility of shielding radiation in the microwave in any range from 800 MHz to 30 GHz. The body can be made of various shapes, it can contain a layer of ballistic fabric, the body can be made foldable, inflatable. 4 c.p. f-crystals, 1 fig.

Description

The utility model relates to the field of combating terrorism by technical means, in particular to the disposal of radio-controlled explosive devices, in particular, to ensure transport security, public safety, etc.

Microwave emitters are known from the prior art, which are used to disable electronics.

A well-known closed-cell explosion localizer (RF Patent 49219, published: 2005.11.10), containing a closed container formed by chambers, the internal volume between which is filled with a porous material, while its pores are closed with a dispersant inside; an internal cavity in which the device to be rendered harmless is placed, in addition, it is equipped with an electromagnetic emitter installed in the internal cavity, the volume of which accommodates the luggage cart; explosion-proof metal case and armored doors at the entrance and exit of the case, installed opposite. The localizer allows you to neutralize a radio-controlled explosive device in the luggage of air passengers, ensures the safety of people, buildings and airport equipment in the event of an explosion and minimizes material losses.

Its disadvantage lies in its large weight and size, which allows it to be used only stationary.

The objective of this utility model is to develop a portable design of a device for neutralizing explosive devices using a microwave pulse, which will be safe for others, and also be able to be controlled remotely.

The technical result consists in increasing safety through the use of a microwave emitter in a housing made with one or more layers of a shielding mesh, designed for maximum shielding in the microwave range.

The utility model is illustrated by a drawing: a figure - a device for neutralizing radio-controlled explosive devices contained in hand luggage.

A device for neutralizing radio-controlled explosive devices in hand luggage contains a closed case with an internal cavity, equipped with an electromagnetic microwave emitter installed at the top of the internal cavity. A receiving antenna is installed on the top of the case from the outside, through a control device connected to an electromagnetic emitter, which provides remote activation and control of the microwave pulse. A shielding material is used as a housing material, made with the possibility of shielding radiation in the microwave range from 800 MHz to 30 GHz.

The effectiveness of magnetic shielding depends on the frequency and electrical properties of the shield material. The lower the frequency, the weaker the effect of the screen, the greater its thickness must be made to achieve the same screening effect. For high frequencies, starting from the medium wave range, a screen made of any metal 0.5-1.5 mm thick works very effectively. When choosing the thickness and material of the screen, one should take into account the mechanical strength, rigidity, resistance to corrosion, the convenience of joining individual parts and making transitional contacts with low resistance between them, the convenience of soldering, welding, etc. (http://www.bnti.ru/showart .asp? aid = 985 & lvl = 04), as well as the transmitting frequency of the microwave pulse. The choice of the material of the screening mesh is carried out on the basis of ensuring the required screening efficiency in a given frequency range under certain restrictions. These limitations are associated with the weight and size characteristics of the screen, its effect on the shielded object, with the mechanical strength and resistance of the screen against corrosion, with the manufacturability of its design, etc. Screening factors are given in the table.

To achieve the technical result declared in this utility model, for example, a steel woven mesh with a thickness of 0.3 mm or more is suitable. When using a screening mesh, for example, "HEG03 screening mesh 55dB" (http://izlucheniya.ru/shop/heg03-setka-ekraniruyushhaya-55db/) at frequencies corresponding to the frequencies of GSM 900 (namely, these frequencies are often used by criminals to initiation of explosive devices), the attenuation will be 55 dB (316,000 times in power). When using two layers of this material, the attenuation increases to 80 dB (100,000,000 times in power). Other materials listed in the table have approximately the same characteristics.

The body can be made in various shapes, for example, a cone, a truncated cone, a cube, etc. to accommodate the largest carry-on baggage. To ensure portability, the body can be foldable and inflatable.

The shielding efficiency S_c , which depends on the frequency, material, thickness and linear dimensions of the screening mesh cell, is determined by the formula:

S_c = λ / 2s [ln (2πr / s)] ,

where r is the radius of the mesh wire, s is the mesh step, λ is the radiation wavelength.

Example. To calculate the shielding grid for microwave radiation of 900 MHz, the shielding grid was calculated. Center frequency f = 900 MHz. Mesh wire diameter d = 1.5 mm. Permissible seepage loss p = 1%. The maximum cell size of the screening mesh is b = 4.6 mm. The signal loss due to leakage through the grid was -0.04 dB.

For more efficient calculation of cell size, wire thickness, etc. it is necessary to make it for a specific frequency response of the microwave emitter.

The device works as follows.

A suspicious object (for example, a found suspicious bag) is covered with the body of the device. Law enforcement officers and citizens are evacuated to the maximum possible distance and remotely give a command to turn on the device. Evacuation is necessary because there is some possibility that an explosive device may detonate when the microwave emitter is turned on. After a remote command to turn on the device, the control signal goes to the receiving antenna located on the outside of the case. Further, through the control device, it turns on the microwave emitter. Microwave radiation, spreading inside the case, destroys all the electronics inside the suspicious object, including the electronics that are used in the construction of the explosive device.

It is known that a microwave beam causes the appearance of induction currents, the parameters of which exceed the capabilities of the circuits. This leads either to burnout of the electronics, or to its abnormal operation. As a consequence, the explosive device fails or is destroyed, since there are risks that the explosive device located under the hull may be initiated. Therefore, it is necessary that at the time of application of microwave electromagnetic radiation (electromagnetic pulse of ultra-high frequency) to an explosive device or a suspicious object, there are no people in the maximum possible radius. Therefore, switching on is performed remotely, making sure that no one is around.

Due to the use of a shielding grid together with a microwave antenna and a microwave radiator, the following advantages were obtained:

1) Low weight of the structure and, as a result, portability of the device.

2) Safety for others - when using a shielding mesh, designed for maximum shielding of the microwave frequency range, practically no radiation escapes outside the body. Attenuation is achieved depending on the frequency up to 100-120 dB.

3) Increasing the efficiency of neutralizing an explosive device through the use of a shielding mesh, causing the effect of interference, since electromagnetic waves will practically not leave the body and, accordingly, will be superimposed on each other inside, and not scattered.

4) If the body contains a layer of ballistic fabric, this will provide maximum absorption of fragments in the event of an explosive device.

5) The device can be turned on and controlled remotely, which increases the safety of use.

Claims (5)

1. A device for neutralizing radio-controlled explosive devices contained in hand luggage, containing a closed case with an internal cavity, equipped with an electromagnetic microwave emitter, characterized in that the case is made with a layer of shielding material designed for maximum shielding in the microwave range. 2. A device for neutralizing radio-controlled explosive devices contained in hand luggage, according to claim 1, characterized in that the body can be made of various shapes. 3. Device for neutralizing radio-controlled explosive devices contained in carry-on baggage, according to claim 1, wherein the body may contain a layer of ballistic tissue. 4. Device for neutralizing radio-controlled explosive devices contained in hand luggage, according to claim 1, characterized in that the body is foldable. 5. Device for neutralizing radio-controlled explosive devices contained in hand luggage, according to claim 1, characterized in that the body is made inflatable.

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