CN115629372B

CN115629372B - Very low frequency underwater fixed sound source

Info

Publication number: CN115629372B
Application number: CN202211571095.3A
Authority: CN
Inventors: 肖海鹏; 涂英; 巩玉振; 王赛龙; 万一心
Original assignee: Wuhan Zhongkehaixun Electronic Technology Co ltd
Current assignee: Wuhan Zhongkehaixun Electronic Technology Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-03-21
Anticipated expiration: 2042-12-08
Also published as: CN115629372A

Abstract

The invention discloses a very low frequency underwater fixed sound source, and relates to the technical field of underwater acoustic sonar. The device comprises an end socket assembly, a cylinder assembly, a base assembly, a sound source assembly, a mounting seat and a mounting clamp, wherein the end socket assembly is arranged at the top of the mounting clamp; the sound source assembly is arranged in the cylinder assembly, and the bottom of the sound source assembly is abutted against the top of the base assembly; the mount pad is fixed on the side of base subassembly. The cylinder body adopts a side body whole-body punching structure and uses the sealing film, so that the pressure resistance of a sound source is ensured to be 1.4MPa, the source level of the sound source can be improved to a certain extent, the sound source is comprehensively improved to the source level, and the problems of large volume and weight and small directional emission angle of the conventional cylindrical sound source are solved.

Description

Very low frequency underwater fixed sound source

Technical Field

The invention belongs to the technical field of underwater acoustic sonar, and particularly relates to a very low frequency underwater fixed sound source.

Background

In underwater acoustic detection, a very low frequency underwater sound source is required to be used as a test sound source to perform performance test on equipment such as a hydrophone and the like. In the field of underwater acoustic countermeasure, the submarine voiceprint feature is exposed at a high risk, the inherent voiceprint feature is difficult to eliminate in a short time by using a damping and noise reduction technology, and in such a case, the superposition of counterfeit voiceprint features is a feasible acoustic countermeasure. In addition, peace period anti-dive training is an important training subject for navy of various countries. When the training adopts a real boat, the problems of difficult military strength allocation and guarantee and the like exist, and effective evaluation and supervision are difficult to carry out in the training process.

When the real boat is trained, the target characteristics are single, various target characteristic parameters for training cannot be simulated, sufficient training cannot be realized, the real boat is difficult to detect, identify and confirm, the real boat cannot be confirmed on site, and the tracked target is often found to be incorrect during the multi-disc analysis, so that the training effect is greatly reduced. The very low frequency underwater sound source can be used for simulating the acoustic characteristics of enemy submarines and submarines, and provides underwater fighting force for the maritime performance assessment of sonar search and diving training and torpedo search and attack diving.

The underwater acoustic countermeasure technology puts the following requirements on a fixed sound source:

(1) The coverage range of the emission line spectrum frequency is not less than 20 Hz-2 kHz;

(2) The total sound level of the signal is not less than 135dB;

(3) A plurality of line spectrum and modulation spectrum signals can be transmitted in sequence;

(4) The working depth range is 5m-100m.

Hitherto, the domestic commonly used underwater low-frequency transducers mainly comprise a circular ring transducer, a flextensional transducer and a longitudinal vibration transducer, and have the defects of large volume and heavy weight, so that the test difficulty is large in underwater sound detection and underwater sound confrontation.

The 5Hz-1000Hz very low frequency broadband emission sound source (CN 102075828B) developed by the model has the total mass of 900kg. UW600 transducer manufactured by G.W company of UK has working frequency band of 4Hz-1kHz, weight of 1070kg and diameter of 880mm. It is necessary to design a very low frequency fixed sound source which is small and light.

Disclosure of Invention

The invention aims to provide a very low frequency underwater fixed sound source, wherein a cylinder body adopts a structure that a side body is punched all over, and a sealing film is used, so that the pressure resistance of the sound source is ensured to be 1.4MPa, the source level of the sound source can be improved to a certain extent, the source level of the sound source is improved in all directions, and the problems of large volume and weight and small directional emission angle of the conventional cylindrical sound source are solved.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a very low frequency underwater fixed sound source which comprises an end enclosure assembly, a cylinder assembly, a base assembly, a sound source assembly, a mounting seat and a mounting clamp, wherein the end enclosure assembly is arranged at the top of the mounting clamp; the sound source assembly is arranged inside the cylinder assembly, and the bottom of the sound source assembly is abutted against the top of the base assembly; the mount pad is fixed on the side of base subassembly, and the mount pad constitutes this fixed sound source's outside mechanical interface with the installation clamp.

The cylinder component comprises a cylinder body, a sealing film, an upper sealing film clamp and a lower sealing film clamp; the sealing membrane is sleeved on the cylinder body, the two semicircular upper sealing membrane hoops are connected through a fastener to clamp the upper part of the sealing membrane, and the two semicircular lower sealing membrane hoops are connected through a fastener to clamp the lower part of the sealing membrane; the periphery of the middle section of the surface of the cylinder body is provided with dense through holes, and the surfaces of the upper section and the lower section are provided with sawtooth-shaped grooves; the inner surfaces of the upper sealing film clamp and the lower sealing film clamp are both provided with a sawtooth-shaped boss which is matched with the sawtooth-shaped groove; the sealing film is a polyurethane tubular film.

Further, the seal head assembly comprises a seal head body, a sound-transmitting baffle, a sound-transmitting membrane and a sound-transmitting membrane gland; the sound transmission baffle is fixed in the stepped annular groove at the top of the seal head body, the sound transmission membrane is arranged above the sound transmission baffle and is also fixed in the stepped annular groove at the top of the seal head body, and the sound membrane gland is fixedly connected with the top of the seal head body through a fastener and is used for compressing the sound transmission membrane.

Furthermore, an O-shaped ring mounting groove is processed on the bottom surface of the end socket body; the sound-transmitting baffle is arranged as a circular plate and is provided with dense through holes; the sound-transmitting membrane is configured as a polyurethane circular membrane.

Further, the base assembly comprises a base body, a watertight connector and a plug; the base body comprises a flange cover, a support frame and a bottom plate; two threaded holes which are symmetrically distributed are processed on the end face of the flange cover, and the watertight connector and the plug are respectively installed on the two threaded holes.

Furthermore, an O-shaped ring mounting groove is formed in the top of the flange cover, and the flange cover is fixedly connected with the bottom of the cylinder body; the flange cover is fixed at the top of support frame, and the bottom plate is fixed in the bottom of support frame, and the support frame is formed by a plurality of angle steel welding processing.

Furthermore, the sound source assembly comprises an air moving-coil transducer, a first heat-conducting ring, a second heat-conducting ring, a connecting column, a lower mounting flange and a transducer retainer ring; the upper part of the air moving-coil transducer penetrates through the lower mounting flange, and a transducer retainer ring is clamped into an upper ring groove of the air moving-coil transducer and is fixedly connected with the lower mounting flange through a screw; the lower part of the air moving coil type transducer is arranged in the first heat conducting ring and is tightly pressed through the second heat conducting ring; the first heat conduction ring is fixedly connected with the lower mounting flange through four connecting posts.

Furthermore, the sound source assembly also comprises a support column, an upper mounting flange, a device supporting plate, a power amplifier, a signal generation control panel, a power supply conversion module and a U-shaped fixing hoop; the upper mounting flange is fixedly connected with the mounting hoop through a fastener; the upper mounting flange and the lower mounting flange are fixedly connected through six pillars; go up the interior fixedly of mounting flange and run through the device backup pad, one side of device backup pad is fixed with power amplifier, and the opposite side upper end of device backup pad is fixed with the signal generation control panel, and the opposite side lower extreme of device backup pad is fixed with power conversion module through the fixed hoop of U type.

The invention has the following beneficial effects:

by arranging the end socket assembly, the cylinder assembly and the base assembly, the whole part is integrated in the metal cylindrical cylinder body with the size not larger than 397 multiplied by 1090mm in the middle and the weight not larger than 160kg, and the defects of overlarge volume and weight of the conventional very-low-frequency transducer are overcome.

According to the invention, the cylinder body is provided with the side body whole-body punching structure and the sealing film is used, so that the pressure resistance of a sound source is ensured to be 1.4MPa, the sound source level can be improved to a certain extent, the sound source level is improved in all directions, and the problem of small directional emission angle of the existing cylindrical sound source is solved.

The invention adopts an external power supply to drive the air moving-coil transducer and the power amplifier, converts electric energy into mechanical energy, and makes the sound source shell vibrate in air to drive the sealing film on the cylinder body and the sound-transmitting film on the top of the end enclosure body to vibrate and emit underwater sound signals, the frequency coverage range of an emission spectrum is not less than 10 Hz-2 kHz, thereby fully meeting the sound source requirement of the underwater sound countermeasure technology and solving the problem that the existing transducer is difficult to emit low-frequency signals within 100 Hz.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure;

FIG. 2 is a front sectional view of the overall structure;

FIG. 3 is a schematic structural view of a head assembly;

FIG. 4 is a schematic view of a connection structure of the end socket body, the mounting clamp and the cylinder body;

FIG. 5 is a schematic view of the cartridge assembly;

FIG. 6 is a schematic view of a base assembly;

FIG. 7 is a perspective view of the sound source assembly;

figure 8 is a front cross-sectional view of the sound source assembly.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a head assembly; 2. a cartridge assembly; 3. a base assembly; 4. a sound source assembly; 5. a mounting seat; 6. installing a clamp; 11. a seal head body; 12. an acoustically transparent baffle; 13. an acoustically transparent membrane; 14. an acoustic membrane gland; 21. a cylinder body; 22. a sealing film; 23. an upper sealing film hoop; 24. a lower sealing film hoop; 31. a base body; 32. a watertight connector; 33. a plug; 41. an air moving coil transducer; 42. a first thermally conductive ring; 43. a second thermally conductive ring; 44. connecting columns; 45. installing a flange; 46. a transducer collar; 47. a pillar; 48. installing a flange; 49. a device support plate; 410. a power amplifier; 411. a signal generation control board; 412. a power conversion module; 413. a U-shaped fixing hoop; 211. a sawtooth-shaped groove; 231. a sawtooth boss; 311. a flange cover; 312. a support frame; 313. a base plate.

Detailed description of the preferred embodiments

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 to 2 and 4, the invention relates to a very low frequency underwater fixed sound source, which comprises an end enclosure assembly 1, a cylinder assembly 2, a base assembly 3, a sound source assembly 4, a mounting seat 5 and a mounting hoop 6, wherein the end enclosure assembly 1 is arranged at the top of the mounting hoop 6, the mounting hoop 6 is arranged at the top of the cylinder assembly 2, the end enclosure assembly, the base assembly and the mounting hoop are fixedly connected through the matching of an O-shaped ring and a screw, the base assembly 3 is fixed at the bottom of the cylinder assembly 2, and the end enclosure assembly, the base assembly and the mounting hoop are fixedly connected through the matching of the O-shaped ring and the screw; the sound source assembly 4 is arranged inside the cylinder assembly 2, and the bottom of the sound source assembly is abutted against the top of the base assembly 3; the mounting 5 is fixed on the side of the base assembly 3, the mounting 5 and the mounting collar 6 forming the external mechanical interface of the fixed sound source.

As shown in fig. 3, the head assembly 1 includes a head body 11, a sound-transmitting baffle 12, a sound-transmitting membrane 13 and a sound-transmitting membrane gland 14; the sound-transmitting baffle 12 is fixed in a stepped annular groove at the top of the end socket body 11, the sound-transmitting membrane 13 is arranged above the sound-transmitting baffle 12 and is also fixed in the stepped annular groove at the top of the end socket body 11, and the sound-transmitting membrane gland 14 is fixedly connected with the top of the end socket body 11 through a fastener and is used for compressing the sound-transmitting membrane 13 to achieve a sealing effect; an O-shaped ring mounting groove is processed on the bottom surface of the end socket body 11; the sound-transmitting baffle 12 is arranged as a circular plate and is provided with dense through holes; the sound-transmitting membrane 13 is provided as a polyurethane circular membrane.

Wherein the cartridge assembly 2 comprises a cartridge body 21, a sealing membrane 22, an upper sealing membrane clip 23 and a lower sealing membrane clip 24, as shown in figure 5; the sealing film 22 is sleeved on the cylinder body 21, the two semicircular upper sealing film clamps 23 are connected through a fastener to clamp the upper part of the sealing film 22, and the two semicircular lower sealing film clamps 24 are connected through a fastener to clamp the lower part of the sealing film 22; the periphery of the middle section of the surface of the cylinder body 21 is provided with dense through holes, and the surfaces of the upper section and the lower section are provided with sawtooth-shaped grooves 211; the inner surfaces of the upper sealing film clamp 23 and the lower sealing film clamp 24 are both provided with a sawtooth-shaped boss 231, and the sawtooth-shaped boss 231 is matched with the sawtooth-shaped groove 211; the sealing film 22 is provided as a polyurethane tubular film.

Whole part integration is not more than in the size in the quarter 397x1090mm, in the metal cylinder barrel body 21 that weight is not more than 160kg, under the prerequisite that guarantees to satisfy very low frequency band scope, has avoided traditional low frequency transducer volume, too big drawback of weight. And the side body of the cylinder body 21 adopts a structure of whole-body punching, and a sealing film 22 is used, so that the pressure resistance of the sound source is ensured to be 1.4MPa, the source level of the sound source can be improved to a certain extent, and the source level of the sound source is improved in all directions.

As shown in fig. 6, the base assembly 3 includes a base body 31, a watertight connector 32 and a plug 33; the base body 31 includes a flange cover 311, a support bracket 312, and a bottom plate 313; two threaded holes which are symmetrically distributed are processed on the end face of the flange cover 311, and the watertight connector 32 and the plug 33 are respectively arranged on the two threaded holes; an O-shaped ring mounting groove is formed in the top of the flange cover 311, and the flange cover 311 is fixedly connected with the bottom of the cylinder body 21; the flange cover 311 is fixed on the top of the support frame 312, the bottom plate 313 is fixed on the bottom of the support frame 312, and the support frame 312 is formed by welding a plurality of angle steels.

As shown in fig. 7 to 8, the acoustic source assembly 4 includes an air-moving-coil transducer 41, a first heat transfer ring 42, a second heat transfer ring 43, a connecting post 44, a lower mounting flange 45, and a transducer retaining ring 46; the upper part of the air moving-coil transducer 41 penetrates through the lower mounting flange 45, and the transducer retainer ring 46 is clamped into an upper annular groove of the air moving-coil transducer 41 and is fixedly connected with the lower mounting flange 45 through screws; the lower part of the air moving coil transducer 41 is arranged in the first heat conduction ring 42 and is pressed tightly by the second heat conduction ring 43; the first heat conduction ring 42 is fixedly connected with the lower mounting flange 45 through four connecting columns 44; the sound source assembly 4 further comprises a support column 47, an upper mounting flange 48, a device supporting plate 49, a power amplifier 410, a signal generation control board 411, a power conversion module 412 and a U-shaped fixing hoop 413; the upper mounting flange 48 is fixedly connected with the mounting hoop 6 through a fastener; the upper mounting flange 48 is fixedly connected with the lower mounting flange 45 through six support columns 47; an apparatus supporting plate 49 penetrates through and is fixed in the upper mounting flange 48, a power amplifier 410 is fixed on one side of the apparatus supporting plate 49, a signal generation control plate 411 is fixed at the upper end of the other side of the apparatus supporting plate 49, and a power supply conversion module 412 is fixed at the lower end of the other side of the apparatus supporting plate 49 through a U-shaped fixing hoop 413.

The power supply mode of the invention is 220V alternating current at the air end, the watertight connector 32 at the bottom of the fixed sound source is connected through a watertight cable to provide drive for the internal devices of the sound source, the air moving coil type transducer 41, the power amplifier 410, the signal generation control panel 411 and the power supply conversion module 412 are matched to realize the emission of the very low frequency sound source, and meanwhile, the signal wire of the control signal generator is led into the air end through the watertight cable to realize the function of manual real-time control.

The present invention is not limited to the above embodiments, and any modifications, equivalent substitutions and improvements of some technical features, which are made to the technical solutions described in the above embodiments, are all within the scope of the present invention.

Claims

1. The utility model provides a very low frequency is fixed sound source under water, includes head subassembly (1), barrel subassembly (2), base subassembly (3), sound source subassembly (4), mount pad (5) and installation clamp (6), its characterized in that:

the end socket assembly (1) is arranged at the top of the mounting hoop (6), the mounting hoop (6) is arranged at the top of the barrel assembly (2) and is fixedly connected with the barrel assembly (2) through the matching of an O-shaped ring and a screw, the base assembly (3) is fixed at the bottom of the barrel assembly (2) and is fixedly connected with the barrel assembly through the matching of the O-shaped ring and the screw;

the sound source assembly (4) is arranged inside the cylinder assembly (2), and the bottom of the sound source assembly is abutted against the top of the base assembly (3);

the mounting seat (5) is fixed on the side surface of the base component (3), and the mounting seat (5) and the mounting clamp (6) form an external mechanical interface of the fixed sound source;

the cylinder component (2) comprises a cylinder body (21), a sealing film (22), an upper sealing film clamp (23) and a lower sealing film clamp (24);

the sealing membrane (22) is sleeved on the barrel body (21), the two semicircular upper sealing membrane clamps (23) are connected through a fastener to clamp the upper part of the sealing membrane (22), and the two semicircular lower sealing membrane clamps (24) are connected through a fastener to clamp the lower part of the sealing membrane (22);

dense through holes are formed in the periphery of the middle section of the surface of the cylinder body (21), and saw-tooth-shaped grooves (211) are formed in the surfaces of the upper section and the lower section;

the inner surfaces of the upper sealing film clamp (23) and the lower sealing film clamp (24) are both provided with a sawtooth-shaped boss (231), and the sawtooth-shaped boss (231) is matched with the sawtooth-shaped groove (211);

the sealing film (22) is a polyurethane tubular film.

2. A very low frequency underwater fixed sound source according to claim 1, characterized in that the head assembly (1) comprises a head body (11), a sound-transparent baffle (12), a sound-transparent membrane (13) and a sound membrane gland (14);

the sound-transmitting baffle (12) is fixed in a stepped annular groove in the top of the seal head body (11), the sound-transmitting membrane (13) is arranged above the sound-transmitting baffle (12) and also fixed in the stepped annular groove in the top of the seal head body (11), and the sound-transmitting membrane gland (14) is fixedly connected with the top of the seal head body (11) through a fastener and used for compressing the sound-transmitting membrane (13).

3. The very low frequency underwater fixed sound source according to claim 2, characterized in that an O-ring mounting groove is machined on the bottom surface of the head body (11);

the sound-transmitting baffle (12) is arranged as a circular plate and is provided with dense through holes in a machining mode;

the sound-transmitting membrane (13) is configured as a polyurethane circular membrane.

4. A very low frequency underwater fixed acoustic source according to claim 1, characterized in that said base assembly (3) comprises a base body (31), a watertight connector (32) and a bulkhead (33);

the base body (31) comprises a flange cover (311), a support frame (312) and a bottom plate (313);

two threaded holes which are symmetrically distributed are processed on the end face of the flange cover (311), and the watertight connector (32) and the plug (33) are respectively installed on the two threaded holes.

5. A very low frequency underwater fixed sound source as claimed in claim 4, characterized in that the top of said flange cover (311) is processed with an O-ring mounting groove, said flange cover (311) is fixedly connected with the bottom of the cylinder body (21);

the flange cover (311) is fixed on the top of the support frame (312), the bottom plate (313) is fixed on the bottom of the support frame (312), and the support frame (312) is formed by welding and processing a plurality of angle steels.

6. A very low frequency underwater fixed acoustic source according to claim 1, characterized in that said acoustic source assembly (4) comprises an air moving coil transducer (41), a first heat-conducting ring (42), a second heat-conducting ring (43), a connection post (44), a lower mounting flange (45) and a transducer collar (46);

the upper part of the air moving-coil transducer (41) penetrates through the lower mounting flange (45), and the transducer retainer ring (46) is clamped in an upper annular groove of the air moving-coil transducer (41) and is fixedly connected with the lower mounting flange (45) through a screw;

the lower part of the air moving coil transducer (41) is arranged in the first heat conducting ring (42) and is pressed by the second heat conducting ring (43);

the first heat conduction ring (42) is fixedly connected with the lower mounting flange (45) through four connecting columns (44).

7. A very low frequency underwater fixed acoustic source according to claim 6, characterized in that said acoustic source assembly (4) further comprises a support column (47), an upper mounting flange (48), an equipment support plate (49), a power amplifier (410), a signal generation control panel (411), a power conversion module (412) and a U-shaped fixing hoop (413);

the upper mounting flange (48) is fixedly connected with the mounting hoop (6) through a fastener;

the upper mounting flange (48) is fixedly connected with the lower mounting flange (45) through six supporting columns (47);

an equipment supporting plate (49) penetrates through and is fixedly arranged in the upper mounting flange (48), the power amplifier (410) is fixedly arranged on one side of the equipment supporting plate (49), the signal generation control plate (411) is fixedly arranged at the upper end of the other side of the equipment supporting plate (49), and the power supply conversion module (412) is fixedly arranged at the lower end of the other side of the equipment supporting plate (49) through a U-shaped fixing hoop (413).