RU18867U1 - HYDROACOUSTIC ANTENNA - Google Patents

Description

Sonar antenna

The utility model relates to the field of hydroacoustics, namely to the design of multi-element antennas of hydroacoustic complexes of surface ships and submarines.

Antenna gidroakusticheshlh koshheksov one of the ships and submarines, intended for work in the modes of an echo and noise direction finding. As a rule, they consist of a large number of converters, the electrical terminals of which are connected by means of sealed cable blocks to a multicore cable (volume 1, p. 6). In a similar way, the flat and cylindrical athenes are implemented in general.

The closest set of features to the proposed utility model is the antenna design, in which individual sealed rod transducers with front plates in parallel rows are mounted on a common base (see 2, p. 232).

The disadvantage of this design of the hydroacoustic antenna is the need to seal each individual transducer, the presence of an additional sealing unit — a cable block with a large number of electrical leads, and the high complexity of installing a hydroacoustic antenna on a carrier ship.

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To solve this problem, in the well-known multi-element antenna containing a base on which rod piezoelectric transducers with front plates and electrical leads are installed in parallel rows, new features are introduced, namely:

- the base is made of plates rigidly fastened together, on

each of which is placed one row of rod piezoelectric

transducers forming a section:

front pads for piezoelectric transducers

each section is placed in the holes of the corresponding plate and

hermetically connected to the walls of the holes with rubber decoupling seals;

each plate together with the rod mounted on the back

transducers with a box casing forms a sealed housing

sections;

each section has a sealed electrical outlet. In the case when the cylindrical hydroacoustic antenna takes the form of a polyhedron, the m-yagdium box casing in cross section has the shape of a trapezoid, the smaller side of which faces the inside of the polyhedron. In this case, due to the reduction of the gaps between adjacent sections, the active surface of the cylindrical antenna increases, which improves its parameters, and the introduction of separately made acoustic screens between adjacent transducers is not required.

Using the proposed utility model ensures the achievement of the following technical results:

reducing the number of sealed leads and eliminating or reducing the number of sealed cable pads with a large number of electrical leads, thereby increasing the reliability of the sonar antenna.

reduction in the number of vulcanization of electrical leads, which reduces the complexity of mounting the acoustical antenna on the carrier ship.

the possibility of creating effective cylindrical sonar antennas with very small structural gaps between adjacent rows of rod piezoelectric transducers due to the use of box-shaped casings having a cross-sectional shape in the form of a trapezoid.

The essence of the utility model is illustrated in FIG. 1 and FIG. 2,

In a flat antenna (Fig. 1), the base is made of rigidly interconnected plates 1, on each of which there is one row of rod piezoceramic transducers 2. whose front plates 3 are installed in the holes of the plates and are hermetically connected to the walls of the holes by rubber junctions - seals 4 ; each plate together with the box casing 5 forms a sealed enclosure with a sealed electrical input 6 - plates are rigidly interconnected by a fastening strip 7.

In a pilindrichest antenna having the shape of a polyhedron inscribed in a cylindrical surface (FIG. 2), the base plate 1 forms a hermetically connected to box-shaped casings 5, which in the cross section are trapezoidal; not shown in figure 2 designs, rigidly connecting the individual sections can be made in the form of flanges.

The operation of the acousto-acoustic antenna is carried out in the usual way. In the radiation mode, the electric signals from the generator device through the cables through the sealed inputs enter the piezoelectric ceramic transducers, which are excited and emit an acoustic signal into the external environment by the working surfaces of the front plates. In the reception mode, an acoustic signal to the external environment is received by piezoceramic rod transducers and converted by them into an electrical signal, which is fed to the receiving device located on the ship using electrical leads. Due to the tight placement of the rod piezoceramic transducers in the proposed utility model, an increase in the active surface of the antenna is achieved, which improves its parameters.

1.M.D. Smaryshev, Yu.Yu. Dobrovolsky Hydroacoustic Antennas L. 1984

2.L. Camp Underwater Acoustics M. 1972

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LITERATURE

Claims (2)

1. A multi-element hydroacoustic antenna containing a base on which rod piezoelectric transducers with front plates are installed in parallel rows, and electrical leads, characterized in that the base is made of plates rigidly fastened to each other, each of which has one row of rod piezoceramic transducers, forming section, while the front pads of piezoelectric transducers of each section are placed in the holes of the corresponding plate and They are tightly connected to the walls of the holes with rubber interchanges - seals, each plate, together with the box casing installed on the rear of the rod transducers, forms a sealed section housing, and each section has a sealed electrical outlet. 2. The antenna according to claim 1, characterized in that the base is made in the form of a polyhedron and each box-shaped casing has a trapezoidal cross section, with the smaller base facing the inside of the polyhedron.