RU2572085C1 - Method for search, detection and monitoring of location of mobile underwater technical objects in sea and ocean areas - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: method of detecting the location of mobile objects comprises monitoring the region of a water area by passive location in the microwave range and is based on detecting the intrinsic microwave radiation of the ocean, arising due to change in the thermohaline structure of surface and deep layers of the ocean, and detecting changes in the structure of the region of the troposphere over the region of the water area, collecting and accumulating arrays of data on thermohaline circulation and the state of the region of the troposphere in the assumed absence of underwater objects. In the assumed presence of an underwater object, monitoring of the given region of the water area and the region of the troposphere is also performed by passive location by receiving, at a ground station, radio signals emitted by the surface of the region of the water area and the region of the troposphere, wherein the method includes comparing the accumulated array of data on thermohaline circulation and the state of the troposphere, with association with the given surface of the water area in the assumed absence of underwater objects, with received radio signals emitted by the surface of the region of the water area and the troposphere; in the assumed presence of an underwater object, in the presence of deviations showing geophysical disturbance as a result of the underwater object crossing geomagnetic lines of the Earth, based on the received data, determining the value of electromagnetic field flux in the direction of the Pointing vector, from which presence of an underwater object is determined; further performing active probing of the troposphere over the given region of the water area in the assumed presence of an underwater object by emitting and receiving radio signals reflected by meta-formations of the troposphere, comparing the accumulated array of data on thermohaline circulation with association with the given surface of the water area in the assumed absence of underwater objects with received radio signals emitted by the surface of the region of the water area in the assumed presence of an underwater object and in the presence of deviations showing geophysical disturbance as a result of an underwater object crossing geomagnetic lines of the Earth, and also determining the electromagnetic field power flux in the direction of the Pointing vector. When approximately identical power flux values are obtained, the underwater object is judged to be an underwater vehicle, wherein change in the state of the troposphere and disturbance arising from thermohaline circulation is used to locate the underwater object.

EFFECT: longer range, wider viewing angle and high stealthiness of objects performing search.

3 dwg

Description

The invention relates to the field of determining the location of moving underwater objects of a technical nature and can be used in searching, detecting and tracking the location of underwater vehicles and platforms.

In the prior art, there is a known method for detecting underwater vehicles using on-board magnetic measuring instruments installed on a mobile carrier, in particular scalar magnetometers, according to which inspection of the designated search area is performed by tacks (RU 2472183 C2, 01/10/2013).

A known system for detecting covert tracking of an underwater vehicle, including a direction finding hydroacoustic station with a towed long antenna and a device for setting and retrieving an antenna, a device for setting hydroacoustic buoys, sonar buoys, a unit for hydroacoustic equipment and hydrophones, a signal processing unit, a signal unit, a buoyancy control unit, ballast dumping unit, buoy flooding unit, mode setting unit (RU 2192655 C2, 11/10/2002).

All known means of detecting underwater vehicles have a small search range.

The technical result consists in increasing the range, viewing angle and the use of non-acoustic methods of searching for underwater vehicles, which, in the case of passive search methods, increases the stealth of the objects conducting the search.

To this end, a method for detecting the location of moving underwater objects is to monitor the area of the water area by passively locating in the microwave range, based on the registration of the ocean’s own microwave radiation resulting from changes in the thermohaline structure of the surface and deep layers of the ocean and registration of changes in the structure of the troposphere located above the water area , collection and accumulation of data arrays on thermohaline circulation and the state of the troposphere at the estimated lack of underwater objects; with the supposed presence of an underwater object, tracking of a given area of the water area and the troposphere area is also carried out by passive location by receiving radio signals emitted by the surface of the water area and the troposphere region at a ground station, the accumulated data on the thermohaline circulation and the state of the troposphere are compared with reference to a given surface of the water area in the alleged absence underwater objects with radio waves received by the surface of the water area and troposphere; with the assumed presence of an underwater object, in the presence of deviations indicating a geophysical disturbance arising from the intersection of the Earth's geomagnetic lines by an underwater object, the magnitude of the electromagnetic field flux in the direction of the Poynting vector is determined from the received data

$$\overline{P}=\left[\overline{E}\ast \overline{H}\right],$$

и $$\overline{H}$$

- векторы напряжённости электрического и магнитного полей соответственно, по которому судят о наличии подводного объекта; дополнительно осуществляют активное зондирование тропосферы над заданной областью акватории при предполагаемом наличии подводного объекта путем излучения и приема отраженных метаобразованиями тропосферы радиосигналов, сравнивают накопленный массив данных о термохалинной циркуляции с привязкой к заданной поверхности акватории при предполагаемом отсутствии подводных объектов с принятыми излучаемыми поверхностью области акватории радиосигналами при предполагаемом наличии подводного объекта и при наличии отклонений, свидетельствующих о геофизическом возмущении, возникающем вследствие пересечения подводным объектом геомагнитных линий Земли, также определяют поток мощности электромагнитного поля в направлении вектора Пойнтинга; при получении приблизительно одинаковых значений потоков мощности судят о том, что подводным объектом является подводная лодка, при этом по изменению состояний тропосферы и возмущениям, возникающим вследствие термохалинной циркуляции, определяют местоположение подводной лодки.Where $$\overline{E}$$

and $$\overline{H}$$

- vectors of electric and magnetic fields, respectively, by which they judge the presence of an underwater object; additionally, active sensing of the troposphere over a given area of the water area is carried out with the supposed presence of an underwater object by emitting and receiving radio signals reflected by the troposphere meta-formations, comparing the accumulated data on thermohaline circulation with reference to a given surface of the water area with the supposed absence of underwater objects with the received radio signals emitted by the surface of the water area at the estimated the presence of an underwater object and in the presence of deviations, evidence Those who are aware of the geophysical disturbance arising from the intersection of the Earth's geomagnetic lines by an underwater object also determine the power flux of the electromagnetic field in the direction of the Poynting vector; upon receipt of approximately the same values of power flows, it is judged that the submarine is a submarine, while the location of the submarine is determined by the change in the troposphere and disturbances arising from the thermohaline circulation.

In FIG. 1 shows a functional diagram of a system for determining the location of moving underwater objects of a technical nature.

In FIG. 2 shows an illustration of passive locating of moving underwater objects.

In FIG. 3 shows an illustration of the active sensing of moving underwater objects.

The system for determining the location of underwater objects (Fig. 1) contains: an artificial Earth satellite 1, or an aircraft 2, or an unmanned aerial vehicle 3, or a ship 5; ground station 4, made in the form of means for detecting moving objects and means for tracking moving objects, while the ground station includes a passive location receiver and an active sensing transceiver with a transceiver antenna; database of accumulated data 6 on thermohaline circulation; a comparison device 7 of the data array and a means of displaying information 8.

The passive location receiver is configured to collect and accumulate data on thermohaline circulation and the state of the receiving troposphere with reference to coordinates 9 in the ocean 10 with an underwater object 11, and the transceiver is capable of sensing and receiving reflected data. Means for detecting moving objects and tracking means for moving objects can be located on aircraft 1, 2, 3 or on mobile platforms and ships in the ocean and are capable of transmitting measurement results to ground station 4.

The general circulation of the oceans is excited by thermohaline (heating, cooling, precipitation and evaporation) and mechanical (shear stress, atmospheric pressure) factors acting on the surface of the ocean (Oceanology. Ocean physics. T. 1. Ocean hydrophysics. Publishing house "Science", M . 1978).

Passive locating in the microwave radio range is based on the registration of microwave radiation from the ocean (“ocean-atmosphere” system).

. Этот вектор имеет размерность мощности (энергии в единицу времени), передаваемой сквозь единицу поверхности, нормальной к направлению распространения волны, и определяется следующим соотношением:For the analysis of electromagnetic fields, the Poynting vector is used. $$\overline{P}$$

. This vector has the dimension of power (energy per unit time) transmitted through a unit of surface normal to the direction of wave propagation, and is determined by the following relation:

$$\overline{P}=\left[\overline{E}\ast \overline{H}\right].$$

Inside the volume under investigation, there may exist sources of electromagnetic energy in which the conversion of some kind of energy or mechanical work into electromagnetic energy takes place.

All data on the processes occurring in the ocean, and the states of the troposphere are collected and accumulated in the databases, for which they monitor the area of the ocean and the troposphere over the area of the studied water through passive and active sounding in the microwave range, based on registration of the ocean’s own microwave radiation, collection and accumulation of data sets on thermohaline circulation of the surface and deep layers of the ocean.

Tracking a given area of the water area can be carried out, for example, using a ground station, or from a flying object, or from platforms and ships in the ocean. To this end, the signals are transmitted by a transmitter with a transceiver antenna and then reflected from the water area and the troposphere to the receiver, then the thermohaline circulation data stored in the database are compared with reference to the coordinates of the given surface of the water area with the received reflected radio signals. Further, in the presence of deviations indicative of a geophysical disturbance, the electromagnetic field power flux is determined in the direction of the Poynting vector, which is used to judge the presence of an underwater vehicle.

Claims (1)

A method for detecting the location of underwater objects of a technical nature, which consists in monitoring the area of the water area by passively locating in the microwave range, based on registration of the ocean’s own microwave radiation resulting from changes in the thermohaline structure of the surface and deep layers of the ocean, and registration of changes in the structure of the troposphere region located above the water area , collection and accumulation of data sets on thermohaline circulation and the state of the troposphere region under the assumption the absence of underwater objects; with the supposed presence of an underwater object, tracking of a given area of the water area and the troposphere area is also carried out by passive location by receiving radio signals emitted by the surface of the water area and the troposphere region at a ground station, the accumulated data on the thermohaline circulation and the state of the troposphere are compared with reference to a given surface of the water area in the alleged absence underwater objects with radio waves received by the surface of the water area and troposphere; in the case of the supposed presence of an underwater object, in the presence of deviations indicating a geophysical disturbance arising from the intersection of the earth's geomagnetic lines by the underwater object, the magnitude of the electromagnetic field flux in the direction of the Poynting vector is determined from which the presence of an underwater object is judged; additionally, active sensing of the troposphere over a given area of the water area is carried out with the supposed presence of an underwater object by emitting and receiving radio signals reflected by the metropods of the troposphere, comparing the accumulated data on thermohaline circulation with reference to a given surface of the water area with the supposed absence of underwater objects with the received radio signals emitted by the surface of the water area at the estimated the presence of an underwater object and in the presence of deviations, evidence Those who are aware of the geophysical disturbance arising from the intersection of the Earth's geomagnetic lines by an underwater object also determine the power flux of the electromagnetic field in the direction of the Poynting vector; upon receipt of approximately the same values of the power flows, it is judged that the underwater object is an apparatus, while the location of the underwater object is determined by the change in the troposphere and disturbances arising from the thermohaline circulation.

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