RU167932U1 - SYSTEM OF PASSIVE DETERMINATION OF THE DISTANCE OF A HYDROACOUSTIC COMPLEX OF A SUBMARINE - Google Patents

Abstract

The utility model relates to hydroacoustic means of lighting underwater conditions and is intended for installation on a submarine. The technical results of using the proposed system for the passive determination of the distance of the sonar complex of a submarine include increasing the accuracy of determining the distance when working in the passive mode, expanding the frequency range of the system, the possibility of passive determining the distance only using onboard antennas, without a flexible, extended towed antenna. To solve the tasks in a passive distance determination system containing two receiving antennas located on opposite sides of the submarine and pre-processing equipment (APO), each receiving antenna is made up of three modules in the form of identical phased antenna arrays located along the board in line on the same distance between their phase centers, while each element of the phased antenna array consists of acoustically connected in series th receiver unit and APO, and APO unit is connected with the common bus EVC. 2 ill.

Description

The utility model relates to the field of hydroacoustics and can be used as sonar weapons for military submarines, as well as in studies of the oceans.

Hydroacoustic complexes (SAC) are the basis of the information system of submarines (submarines); Using the SAS, the complex task of observing the underwater situation is solved, including the detection, determination of coordinates and elements of movement, and the classification of various targets.

At present, a typical structure of the HAC submarine [1-6] has been formed, including noise-finding systems with noise-detecting subsystems in the mid-frequency and low-frequency ranges, sonar systems, sonar detection, sound transmission, classification, etc. [6]. The operation of the submarine hull is ensured by the central computer system (CVS), a display, registration, documentation and control system, including remote control devices, technical diagnostics and power supply systems.

One of the main tasks of underwater observation is to solve a coordinate problem, including determining the distance to the target, as well as its angular coordinates - course angle to the target (horizontal coordinate) and elevation angle (vertical coordinate). Since secrecy is an important tactical factor for submarines, the coordinate problem should be solved in a passive mode. In the GAK PL [1-6], the angular coordinates of a noisy target are determined using passive systems for noise direction finding and hydroacoustic signal detection, but the distance to the target can only be determined in active mode.

The closest in functional and technical characteristics to the proposed utility model is an additional passive distance determination (AML) system, which is part of the “Hydroacoustic Submarine Complex” according to the Utility Model Patent [7], and in the HAC PL [7] in the AML prototype system includes two long-range side antennas (PBA), which are identical linear antenna arrays located on both sides of the submarine and connected to the inputs of the pre-processing equipment. Determining the distance to the target in passive mode, i.e. AML system functions are carried out with the release of a flexible extended towed antenna (GPBA) with the joint processing in the central computer system (CVS) of signals received by the PBA and GPBA.

The prototype device can monitor the underwater environment, including target detection, solving coordinate problems, target classification.

At the same time, the AML prototype system has several disadvantages:

- passive distance determination, implemented using joint processing of signals from GPBA and PBA, does not have high accuracy, because it is impossible to take into account the independent and random yaw of GPAA and PL (on whose sides the PBA is located): yawing leads to amplitude-phase fluctuations of signals and errors in the joint processing of signals from various antennas with a random arrangement of the phase center;

- the system can operate only in the low-frequency (LF) range of the GPBA [6];

- the system can function only with the released GPBA, but the GPBA release procedure requires a rather long time and is a technologically complicated operation [6], therefore, the GPBA is not issued often.

The main objective of the proposed utility model is to expand the functionality of the SAC.

The technical results of using the utility model are:

- improving the accuracy of determining the distance when working in passive mode;

- expansion of the frequency range of the AML system;

- the ability to passively determine the distance only with the help of onboard antennas, without issued GPBA, which simplifies the process of determining the distance and increases its manufacturability.

To ensure the indicated technical results, new features have been introduced into the passive system for determining the distance of the sonar complex of a submarine (PL), containing the first and second receiving antennas located on the opposite sides of the submarine, and pre-processing equipment (APO), through a common bus connected to the DAC, namely, the first and second receiving antennas each consists of three modules in the form of identical phased antenna arrays located along their side in line at the same distance between their phase and centers, each element of each phased array antenna composed of structurally made in a single body are connected in series and the acoustic receiver POA block, wherein each block is connected to the common bus POA with PCV.

The placement of the receiving antennas of the system on board the submarine ensures the absence of fluctuations caused by the mutual dynamics of the arrangement of the phase centers of the airborne antennas and the HBA, as is the case in the prototype system [7]. Since all antennas are located on the submarine hull, the AML system, like all on-board HAC submarine systems, can be switched on continuously. The diameter of the GPBA shell limits the size of the cylindrical transducers that make up the active elements of the GPBA; therefore, the upper boundary of the frequency range of the GPBA is limited by a frequency of ~ 1.5 kHz [6]. In the case of airborne antennas, the boundary of the frequency range can be increased, which extends the range of received signals from the target.

The essence of the claimed utility model is illustrated in FIG. 1 by a generalized functional diagram, and also FIG. 2, where a functional diagram of an antenna module element of an onboard antenna of the AML system is shown.

The passive distance determination system consists of two identical antennas 4 and 5 (A1, A2), located on both sides of the submarine. Each of the antennas A1, A2 consists of three antenna modules (A1 _1,2,3 , A2 _1,2,3 ). Antenna modules are multi-element phased antenna arrays, the element of the antenna module 6 (Fig. 2) consists of a series-connected sonar transducer 7 (HAP) and a unit of pre-processing equipment 8 (APO block). The APO block of each element is connected to a common bus 3 of the sonar complex. The element of the antenna module 6 is made in the form of a single construct consisting of a HAP and an APO block.

The APO blocks of the antenna modules are connected via bus 3 to DAC 1. In DAC 1, the control signals of the remote control devices 2 are transmitted, and signals of various types from DAC via shared bus 3 are transmitted (or received) to all HAC systems. The information processed in the systems of the complex is transmitted via bus 3 and DAC 1 to the control panels or to external systems.

Constructive and other characteristics of the individual nodes and elements that make up the HAC are known from the literature. A description of the structure of HAC and individual subsystems and systems is presented in [6, 9].

Antennas 4, 5 are receiving and are designed to convert acoustic signals into electrical ones. Direct energy conversion is carried out in hydroacoustic transducers 7. Information on the designs and types of antennas and transducers are presented in [8, 9].

The pre-processing units 8 are performed on analog-digital means. The main functions of the APO are amplification and filtering. Information from the output of each APO 8 block in digital format is transmitted via a common bus 3 to DSC 1 [6, 10].

The operation of the HAC is controlled by operators from the remote control devices. By default, the main mode of operation of the submarine hull is the receiving one, so the passive distance determination system is operatively turned on.

The introduction of new essential features into the SAC provides the claimed technical effect associated with the expansion of the capabilities of the SAC and an increase in the efficiency of its functioning. In particular:

- all antennas that ensure the operation of the AML system are located on the carrier, which ensures the constancy of the distances between the phase centers of the antenna modules of each side, the elimination of random errors caused by fluctuations of these distances during joint processing of signals from the PBA and GPBA in the prototype [7], and, as consequence, increasing the accuracy of passive distance determination;

- since the system pre-processing equipment is built into the antenna modules, communications are reduced and noise immunity to radio interference is increased;

- the AML system is in constant readiness for work.

The inventive utility model extends the technical capabilities of observing the underwater environment and can be used as a passive distance determination system for submarines of various types.

Information sources

1. RF patent No. 2281528. Hydroacoustic complex of a submarine. IPC G01S 15/87. Claim 10/13/2004, publ. 08/10/2006, bull. Number 22.

2. Certificate for utility model No. 20388. Hydroacoustic complex of a submarine. IPC G01S 3/80, G01S 15/00. Claim 03/11/2001, publ. 10/27/2001, bull. No. 30.

3. Certificate for utility model No. 24736. Hydroacoustic complex of a submarine. IPC G01S 15/00. Claim 02.21.2002, publ. 08/20/2002, bull. Number 23.

4. TSM 2233. Sonar System for Submarine. Prospectus of Thomson Marconi Sonar, France.

5. RF patent for utility model No. 50004. Hydroacoustic complex of a non-nuclear submarine. IPC G01S 3/80. Claim 05.03.2005, publ. 12/10/2005, bull. Number 34.

6. Koryakin Yu.A., Smirnov S.A., Yakovlev G.V. Ship sonar equipment. St. Petersburg: Science, 2004.

7. RF patent for utility model No. 122494. Hydroacoustic complex of a submarine. IPC G01S 3/80. Claim 07/05/2012, publ. 11/27/2012, bull. No. 33 (PROTOTYPE).

8. Smaryshev M.D., Dobrovolsky Yu.Yu. Hydroacoustic antennas. L., Shipbuilding, 1984.

9. Handbook of sonar. L., Shipbuilding, 1988.

10. RF patent No. 2539819. Antenna module with digital output. IPC H04R 1/44. Claim 10.24.2013, publ. 01/27/2015, bull. Number 3.

Claims (1)

A passive system for determining the distance of a submarine’s sonar system, containing the first and second receiving antennas located on the opposite sides of the submarine, and preliminary processing equipment (APO), through a common bus connected to the central computer system (CVS), characterized in that the first and second receiving antennas each consists of three modules in the form of identical phased antenna arrays located on its board in line at the same distance between their phase centers, with each The element of each phased antenna array consists of a series-connected acoustic receiver and an APO unit, which are structurally constructed in a single housing, and each APO unit is connected by a common bus to a DAC.

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