CN112929097B - Underwater low-frequency hanging sound source - Google Patents
Underwater low-frequency hanging sound source Download PDFInfo
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- CN112929097B CN112929097B CN202110077736.9A CN202110077736A CN112929097B CN 112929097 B CN112929097 B CN 112929097B CN 202110077736 A CN202110077736 A CN 202110077736A CN 112929097 B CN112929097 B CN 112929097B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention provides an underwater low-frequency hanging sound source which comprises a low-frequency transmitting transducer, a low-frequency focusing sound reflector and an adjustable bracket, wherein the low-frequency transmitting transducer is positioned in the middle of the low-frequency focusing sound reflector, an arc-shaped concave cavity is formed in one side of the low-frequency focusing sound reflector, facing the low-frequency transmitting transducer, and is used for focusing and reflecting sound signals transmitted by the low-frequency transmitting transducer, and the low-frequency focusing sound reflector is fixedly connected with the adjustable bracket. The underwater low-frequency hanging sound source can be used for a transmitting end of low-frequency underwater sound communication, compared with an omni-directional sound source, the gain and the signal to noise ratio of a transmitting signal can be improved, a longer communication distance can be achieved, meanwhile, the signal is transmitted from a single side, and the concealment of communication is greatly improved; the adjustable bracket can also adjust the emission focusing and the emission direction, and is particularly suitable for the scenes of ultra-long distance signal emission and hidden communication.
Description
Technical Field
The invention relates to the technical field of underwater acoustic communication and underwater acoustic detection, in particular to an underwater low-frequency hanging sound source.
Background
The implementation of underwater telecommunication and remote detection functions relies on the underwater acoustic correlation technique, in particular low frequency underwater acoustic signals, which are transmitted in the ocean with minimal losses and are able to travel the furthest distance.
In the underwater acoustic communication and underwater acoustic detection system in the prior art, an underwater acoustic transmitter and an underwater acoustic transducer are core components in underwater acoustic equipment, and the core performance index of the whole sonar system is determined. The high-power low-frequency sound source is mostly emitted in all directions and is limited by a low-frequency sound emission technology, the sound source level of the low-frequency sound source is difficult to improve, and the emitting direction and the transmission distance of sound signals of the low-frequency sound source are difficult to meet the requirements of various different use environments and projects simultaneously.
Disclosure of Invention
In view of the above application scenario, the present invention aims to provide an apparatus to solve the above-described problems. An object of the present invention is to provide an underwater low frequency sound source for hanging sound which solves the above problems. In particular, the invention provides an underwater low-frequency suspended sound source capable of improving the sound source level and concealment of sound signals.
In order to achieve the above purpose, the invention provides an underwater low-frequency hanging sound source, which comprises a low-frequency transmitting transducer, a low-frequency focusing sound reflector and an adjustable bracket, wherein the low-frequency transmitting transducer is positioned in the middle of the low-frequency focusing sound reflector, one side of the low-frequency focusing sound reflector, which faces the low-frequency transmitting transducer, is provided with an arc-shaped concave cavity, the arc-shaped concave cavity focuses and reflects sound signals transmitted by the low-frequency transmitting transducer, and the low-frequency focusing sound reflector is fixedly connected with the adjustable bracket.
The top of the adjustable bracket is provided with a plurality of installation parts at intervals, and the arrangement direction of the installation parts is parallel to the opening direction of the arc-shaped concave cavity.
The low-frequency focusing sound reflector comprises a closed shell and a framework, wherein the framework is arranged between the outer layer and the inner layer of the closed shell.
Wherein the wall thickness of the closed shell is more than or equal to 30mm.
Wherein, airtight casing is stainless steel material.
The arc-shaped concave cavity is of a spherical structure, and the radius of the arc-shaped concave cavity is larger than or equal to 1.5m.
The low-frequency transmitting transducer is an overflow ring transducer or a tube beam coupling transducer or a bending transducer.
Wherein the frequency of the low frequency transmitting transducer is lower than 1kHz.
The underwater low-frequency hanging sound source can be used for a transmitting end of low-frequency underwater sound communication, compared with an omni-directional sound source, the gain and the signal to noise ratio of a transmitting signal can be improved, a longer communication distance can be achieved, meanwhile, the signal is transmitted from a single side, and the concealment of communication is greatly improved; the adjustable bracket can also adjust the emission focusing and the emission direction, and is particularly suitable for the scenes of ultra-long distance signal emission and hidden communication.
Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to identify like elements. The drawings, which are included in the description, illustrate some, but not all embodiments of the invention. Other figures can be derived from these figures by one of ordinary skill in the art without undue effort.
Fig. 1 exemplarily shows a schematic cross-sectional structure of an underwater low-frequency hanging sound source of the present invention;
fig. 2 exemplarily shows a front view of the underwater low frequency hanging sound source of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
In order to improve the signal-to-noise ratio of the underwater sound signal and the concealment of the underwater sound communication, the inventor designs a unilateral sound source, focuses and reflects the sound signal by utilizing the concave cavity of the sound reflector with the concave cavity, realizes unilateral emission of the sound signal, enhances the gain and the signal-to-noise ratio of the sound signal, prolongs the signal transmission distance, and greatly improves the concealment of the underwater communication.
The underwater low-frequency hanging sound source provided by the invention is described in detail below with reference to the accompanying drawings.
Fig. 1 shows a schematic cross-sectional structure of a specific embodiment of the underwater low-frequency suspended sound source of the present invention, and referring to fig. 1, the underwater low-frequency suspended sound source includes a low-frequency transmitting transducer 1, a low-frequency focusing sound reflector 2, and an adjustable bracket 3. The low-frequency transmitting transducer 1 is located in the middle of the low-frequency focusing acoustic reflector 2, for example, two ends of the low-frequency transmitting transducer 1 can be suspended and fixed on the edge of the low-frequency focusing acoustic reflector 2, and the low-frequency focusing acoustic reflector 2 is used for blocking and reflecting acoustic signals sent by the low-frequency transmitting transducer 1, so that single-side transmission of the acoustic signals is realized, the concealment of the transmission of the acoustic signals is improved, and the risk of being intercepted halfway is greatly reduced.
The arc-shaped concave cavity 20 is arranged on one side of the low-frequency focusing sound reflector 2, facing the low-frequency transmitting transducer 1, and the arc-shaped concave cavity 20 is utilized to focus and reflect sound signals transmitted by the low-frequency transmitting transducer 1, and the reflected signals are overlapped with sound signals transmitted by the low-frequency transmitting transducer 1, facing the other side, so that the gain and the signal-to-noise ratio of the sound signals are fully improved, and the sound source level of the sound signals can be greatly improved. Experiments prove that the low-frequency sound source level reflected by the low-frequency focusing sound reflector 2 can be improved by more than 3dB compared with the ground sound source level which is not applicable to the reflection of the low-frequency focusing sound reflector 2.
In use, the low frequency focusing acoustic reflector 2 is fixedly connected to the adjustable support 3, for example, the low frequency focusing acoustic reflector 2 may be fixedly connected to one end or the middle of the adjustable support 3.
In order to realize the adjustment of the sound signal transmitting direction, the requirements of communication in different directions are met, for example, the adjustable bracket 3 can be adjusted to realize the adjustment of the reflecting direction of the low-frequency focusing sound reflector 2, so that the flexible signal transmission is realized.
In the embodiment shown in fig. 1, a plurality of mounting portions 30 are arranged at intervals at the top of the adjustable bracket 3, and the arrangement direction of the plurality of mounting portions 30 is parallel to the opening direction of the arc-shaped concave cavity 20, so that the gravity centers of the underwater low-frequency suspended sound source and the low-frequency focusing sound reflector 2 can be changed by adjusting the adjustable bracket 3 through different mounting portions 30, the adjustment of the inclination direction and the inclination angle of the low-frequency focusing sound reflector 2 is realized, namely, the adjustment of the opening direction of the arc-shaped concave cavity 20 is realized, and the purpose of adjusting the reflection direction of sound signals is further achieved.
In order to ensure the focusing and reflecting effects on the acoustic signals, the low-frequency focusing acoustic reflector 2 of the scheme is of a hollow structure. In the embodiment shown in fig. 1, the low-frequency focusing acoustic reflector 2 includes a closed casing 21 and a skeleton 22, wherein an inner layer of the closed casing 21 forms an arc-shaped concave cavity 20, a cavity is formed between an outer layer and an inner layer of the closed casing 21, and the skeleton 22 is disposed in the cavity between the outer layer and the inner layer of the closed casing 21 to support the outer layer and the inner layer of the closed casing 21.
In an alternative embodiment, the inner layer and the outer layer of the airtight housing 21 are made of high-strength stainless steel materials, and the skeleton 22 is made of high-strength stainless steel materials. Further, the wall thickness of the hermetic case 21 is 30mm or more to sufficiently secure the reflection performance for the acoustic signal.
Fig. 2 is a front view showing an underwater low frequency suspended sound source according to the present invention, and fig. 1 and 2 are combined to show that in this embodiment, the low frequency focusing sound reflector 2 has a hollow hemispherical structure and the arc-shaped concave cavity 20 has a spherical structure. To further ensure focusing and reflection effects on the acoustic signals, the radius of the arcuate cavity 20 is 1.5m or more.
Further, the low frequency transmitting transducer 1 is located at the center of the spherical structure of the arc-shaped concave cavity 20 of the low frequency focusing acoustic reflector 2, and at this time, the low frequency focusing acoustic reflector 2 has the best focusing and reflecting effects on the signal emitted from the low frequency transmitting transducer 1.
In this embodiment, the low-frequency transmitting transducer 1 may be an overflow ring transducer, a tube beam coupling transducer, or a bending transducer. The frequency of the low frequency transmitting transducer 1 is illustratively below 1kHz.
The above description may be implemented alone or in various combinations and these modifications are within the scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The underwater low-frequency hanging sound source is characterized by comprising a low-frequency transmitting transducer (1), a low-frequency focusing sound reflector (2) and an adjustable bracket (3), wherein the low-frequency transmitting transducer (1) is positioned in the middle of the low-frequency focusing sound reflector (2), an arc-shaped concave cavity (20) is formed in one side, facing the low-frequency transmitting transducer (1), of the low-frequency focusing sound reflector (2), the arc-shaped concave cavity (20) focuses and reflects sound signals transmitted by the low-frequency transmitting transducer (1), and the low-frequency focusing sound reflector (2) is fixedly connected with the adjustable bracket (3);
the top of the adjustable bracket (3) is provided with a plurality of mounting parts (30) at intervals, and the arrangement direction of the mounting parts (30) is parallel to the opening direction of the arc-shaped concave cavity (20); the adjustable bracket (3) is adjusted to be installed through different installation parts (30), so that the gravity centers of the underwater low-frequency hanging sound source and the low-frequency focusing sound reflector (2) are changed, and the inclination direction and the inclination angle of the low-frequency focusing sound reflector (2) are adjusted;
the low-frequency focusing sound reflector (2) is of a hollow structure and comprises a closed shell (21) and a framework (22), wherein an arc-shaped concave cavity (20) is formed in the inner layer of the closed shell (21), a cavity is formed between the outer layer and the inner layer, and the framework (22) is arranged between the outer layer and the inner layer of the closed shell (21).
2. An underwater low frequency sound source as claimed in claim 1, wherein the wall thickness of the closed casing (21) is 30mm or more.
3. An underwater low frequency sound source as claimed in claim 1, characterised in that the containment casing (21) is of stainless steel.
4. The underwater low-frequency hanging sound source as claimed in claim 1, wherein the arc-shaped concave cavity (20) has a spherical structure, and the radius of the arc-shaped concave cavity (20) is greater than or equal to 1.5m.
5. An underwater low frequency boom sound source as claimed in claim 1, characterized in that the low frequency transmitting transducer (1) is an overflow ring transducer or a tube beam coupled transducer or a flextensional transducer.
6. An underwater low frequency boom sound source as claimed in claim 1, characterized in that the frequency of the low frequency transmitting transducer (1) is below 1kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110077736.9A CN112929097B (en) | 2021-01-20 | 2021-01-20 | Underwater low-frequency hanging sound source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110077736.9A CN112929097B (en) | 2021-01-20 | 2021-01-20 | Underwater low-frequency hanging sound source |
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| CN112929097A CN112929097A (en) | 2021-06-08 |
| CN112929097B true CN112929097B (en) | 2023-05-30 |
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| CN202110077736.9A Active CN112929097B (en) | 2021-01-20 | 2021-01-20 | Underwater low-frequency hanging sound source |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901464A (en) * | 2014-04-04 | 2014-07-02 | 西北工业大学 | Portable underwater strong sound source |
| CN108225285A (en) * | 2018-01-30 | 2018-06-29 | 国家海洋技术中心 | A kind of pull-type underwater sound source system |
| CN109741730A (en) * | 2019-01-23 | 2019-05-10 | 中国电子科技集团公司第二十九研究所 | A kind of underwater plasma sound source direction radiation appliance |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6512495B1 (en) * | 2001-08-28 | 2003-01-28 | Qualcomm, Inc. | Concave reflector with phase shifted and selectively focused output energy |
| CN1164341C (en) * | 2001-11-05 | 2004-09-01 | 北京源德生物医学工程股份有限公司 | Focusing ultrasonic source |
| JP4656520B2 (en) * | 2005-12-28 | 2011-03-23 | 日本ビクター株式会社 | Reflective electroacoustic transducer |
| US8111585B1 (en) * | 2008-02-21 | 2012-02-07 | Graber Curtis E | Underwater acoustic transducer array and sound field shaping system |
| CN205610640U (en) * | 2016-04-15 | 2016-09-28 | 福建天晴数码有限公司 | Bluetooth signal beam forming device based on signal reflection |
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2021
- 2021-01-20 CN CN202110077736.9A patent/CN112929097B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901464A (en) * | 2014-04-04 | 2014-07-02 | 西北工业大学 | Portable underwater strong sound source |
| CN108225285A (en) * | 2018-01-30 | 2018-06-29 | 国家海洋技术中心 | A kind of pull-type underwater sound source system |
| CN109741730A (en) * | 2019-01-23 | 2019-05-10 | 中国电子科技集团公司第二十九研究所 | A kind of underwater plasma sound source direction radiation appliance |
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| CN112929097A (en) | 2021-06-08 |
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