CN117784107A - Secondary underwater sound emission array test device - Google Patents
Secondary underwater sound emission array test device Download PDFInfo
- Publication number
- CN117784107A CN117784107A CN202311777889.XA CN202311777889A CN117784107A CN 117784107 A CN117784107 A CN 117784107A CN 202311777889 A CN202311777889 A CN 202311777889A CN 117784107 A CN117784107 A CN 117784107A
- Authority
- CN
- China
- Prior art keywords
- sound emission
- test device
- sound
- steel plate
- secondary underwater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 230000001427 coherent effect Effects 0.000 claims abstract description 6
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 6
- 239000010432 diamond Substances 0.000 claims abstract description 6
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- 230000005855 radiation Effects 0.000 claims description 16
- 239000008358 core component Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 description 13
- 238000001514 detection method Methods 0.000 description 11
- 238000013016 damping Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 230000030279 gene silencing Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention relates to a secondary underwater sound emission array test device, which comprises a backing steel plate, a rubber plate and a secondary underwater sound emission unit; the rubber plate is connected to one side surface of the backing steel plate in an adhesive mode, and a plurality of groups of cavities are distributed on one side of the backing steel plate in an array mode; each group of cavities consists of four cavities distributed in a diamond shape; the opening of the cavity faces the backing steel plate; one secondary underwater sound emission unit is arranged in each cavity; the back lining steel plate is provided with threading holes corresponding to the cavities one by one, and the threading holes are used for threading power lines and signal lines; the secondary underwater sound emission unit can form a plane sound field with higher sound power by emitting sound waves with the same phase and the same frequency, so that coherent cancellation of the detected sound waves is realized. The test device can enable the emitting unit array to generate the plane sound waves with good sound field consistency.
Description
Technical Field
The invention relates to the technical field of underwater noise control, in particular to a secondary underwater sound emission array test device.
Background
The underwater vehicle has the advantages of high mobility and the like, the existence of the underwater vehicle is hardly found in the ocean by naked eyes, the propagation loss of signals such as electromagnetic waves in water is large, long-distance detection cannot be realized, and a plurality of detection means commonly used in the air cannot be applied to underwater.
The acoustic wave has strong anti-interference capability, is sensitive to obstacles, has high accuracy, and simultaneously has a propagation speed far higher than that of air in water, so that an object can be detected in a short time and an echo signal can be transmitted to a receiving station, and the acoustic wave has become the most main means for detecting an object underwater. The common detection device under water is sonar. In contrast, in order to prevent detection instruments such as sonar from finding, underwater vehicles often use sound damping materials to suppress their own acoustic radiation characteristics and reduce the detection probability and distance of sonar. The noise elimination material can be classified into passive noise elimination material, semi-active noise elimination material, etc. according to the working principle. At present, an underwater vehicle usually adopts a passive silencing material to realize sonar echo absorption, an acoustic cavity is reserved in the material, local resonance is generated by utilizing the acoustic cavity through a Helmholtz effect, and most of acoustic energy is converted into resonance energy of the cavity, so that a silencing effect is achieved.
Under the development trend of low-frequency detection of modern active sonar, particularly for low-frequency sound waves below 2kHz, active sound waves with a meter-class large wavelength are suppressed within a thickness range of not more than 70mm, and the traditional passive sound damping material only depends on material update and structural evolution, so that the sound absorption requirement of an underwater vehicle is difficult to meet.
The active echo suppression technology is a novel countermeasures for coping with underwater low-frequency active detection in recent years. The secondary underwater sound emitting unit is used as a core working device thereof, and in practical application, the desired acoustic performance is difficult to achieve when the secondary underwater sound emitting unit is singly used. The arrangement of the emission units in the active sound damping material by an array is particularly important, but the research on how to realize better consistency of the planar sound field by the array layout is rarely concerned.
Disclosure of Invention
The invention provides a secondary underwater sound emission array test device which can enable an emission unit array to generate plane sound waves with good sound field consistency.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a secondary underwater sound emission array test device, which comprises a backing steel plate, a rubber plate and a secondary underwater sound emission unit;
the rubber plate is connected to one side surface of the backing steel plate in an adhesive mode, and a plurality of groups of cavities are distributed on one side of the backing steel plate in an array mode; each group of cavities consists of four cavities distributed in a diamond shape; the opening of the cavity faces the backing steel plate;
one secondary underwater sound emission unit is arranged in each cavity;
the back lining steel plate is provided with threading holes corresponding to the cavities one by one, and the threading holes are used for threading power lines and signal lines;
the secondary underwater sound emission unit can form a plane sound field with higher sound power by emitting sound waves with the same phase and the same frequency, so that coherent cancellation of the detected sound waves is realized.
Further, the cavity is formed by a blind hole and a square groove which are communicated in the thickness direction of the rubber plate, and the square groove is positioned at the bottom of the blind hole;
the opening of the blind hole is positioned on one side surface of the rubber plate, which faces the backing steel plate;
the blind hole is used for fixedly mounting the core component of the secondary underwater sound emission unit, and the square groove is used for fixedly mounting the radiation panel of the secondary underwater sound emission unit.
Further, the backing steel plate is a rectangular plate, the length is 1600mm, the width is 1500mm, and the thickness is 8mm;
the rubber plate is a square rubber plate, the length and the width are 1500mm, and the thickness is 50mm.
Further, the aperture of the blind hole is 100mm, and the depth is 41mm;
the side length of the square groove is 150mm, and the depth is 4mm;
the thickness of the secondary underwater sound emission unit is 42mm.
Further, the diameter of the threading hole is 60mm.
Further, a hoisting hole for threading a steel rope for hoisting is formed in the top of the backing steel plate.
Further, the aperture of the lifting hole is 50mm.
Further, the rubber plate is provided with four groups of cavities distributed in a rectangular shape.
Still further, the spacing between cavities in each set of cavities is 265mm.
Further, the calculation formula of the sound pressure P at a certain point in the sound field formed by the secondary underwater sound emission unit is as follows:
in the above formula, P is sound pressure; a is that i In relation to sound sources and media; r is (r) i Distance from the point to the ith secondary underwater sound emission unit; omega is the frequency; lambda is the wavelength at that frequency; j is an imaginary unit; t is time;deflecting the phase difference for the array;
the calculation formula of the total radiation power W of the secondary underwater sound emission unit is as follows:
in the above formula, P is sound pressure; s is the total area of the radiation surface; ρ is the medium density; c is the speed of sound in the medium.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the secondary underwater sound emission array test device, the secondary underwater sound emission units distributed in the rubber plate in an array manner can effectively improve the sound radiation power of the secondary underwater sound emission units, and a plane sound field can be formed better and faster; the rubber plate can be used for passively silencing the detection sound waves during the period that the secondary underwater sound emission unit does not work.
2. When the secondary underwater sound emission array test device adopts the specific parameters to carry out array layout, a better plane sound field can be formed at a position of 10m, the sound pressure difference value at the moment is reduced to 0.0015Pa, the consistency of the plane sound field is good, and the sound damping performance of the active sound damping material is improved.
3. The secondary underwater sound emission array test device can overcome the defect that the traditional passive silencing material can only eliminate medium-high frequency sound waves by using the secondary underwater sound emission units in an array mode, and can also eliminate low-frequency detection sound waves by generating same-frequency opposite-phase sound waves through a coherent cancellation strategy.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional structure of a secondary underwater sound emission array test apparatus of the present invention;
FIG. 2 is a rear side view of FIG. 1;
FIG. 3 is a cross-sectional view taken along section A-A of FIG. 2;
FIG. 4 is a cross-sectional view of the secondary underwater sound emission unit shown in section A-A of FIG. 2;
fig. 5 shows the sound pressure difference in the planar sound field formed by the secondary underwater sound emission array test device of the present invention at different distances.
Wherein, the backing steel plate 1-, the rubber plate 2-, the secondary water sound emission unit 3-, the threading hole 11-, the lifting hole 12-, the blind hole 21-and the square groove 22-are arranged
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
The embodiment of the invention provides a secondary underwater sound emission array test device, which is shown in figures 1, 2 and 3, and comprises a backing steel plate 1, a rubber plate 2 and a secondary underwater sound emission unit 3; the secondary underwater sound emission unit 3 is also called an array element;
the rubber plate 2 is adhered and connected to one side surface of the backing steel plate 1, and a plurality of groups of cavities are distributed on one side of the backing steel plate 1 in an array manner; each group of cavities consists of four cavities distributed in a diamond shape; the opening of the cavity faces the backing steel plate 1; a secondary underwater sound emission unit 3 is arranged in each cavity; in this embodiment, taking the case of setting 16 secondary underwater sound emission units 3 as an example, correspondingly, 4 groups of cavities are distributed on the rubber plate 2 in an array, and the 4 groups of cavities are distributed in two rows and two columns, so that the 4 groups of cavities are distributed on the rubber plate 2 in a rectangular shape; the 4 cavities in each group of cavities are respectively arranged at four corners of the diamond; along the side length direction of the diamond, the distance between two adjacent cavities in each group of cavities is 265mm;
the backing steel plate 1 is provided with threading holes 11 corresponding to each cavity one by one, in the embodiment, as shown in fig. 2, the backing steel plate 1 is provided with 16 threading holes 11, the threading holes 11 are used for threading power lines and signal lines, and the power lines and the signal lines are used for connecting the secondary underwater sound emission units 3; the diameter of the threading hole 11 can be 60mm;
the secondary underwater sound emission unit 3 can form a plane sound field with higher sound power by emitting sound waves with the same phase and the same frequency, so as to realize coherent cancellation of the detected sound waves.
According to the secondary underwater sound emission array test device, the secondary underwater sound emission units 3 distributed in the rubber plate 2 in an array manner can effectively improve the sound radiation power of the secondary underwater sound emission units 3, and a plane sound field can be formed better and faster; the rubber sheet 2 can passively damp sound waves during the period when the secondary underwater sound emission unit 3 is not in operation. The secondary underwater sound emission array test device can overcome the defect that the traditional passive silencing material can only eliminate medium-high frequency sound waves by using the secondary underwater sound emission units 3 in an array mode, and can also eliminate low-frequency detection sound waves by generating same-frequency opposite-phase sound waves through a coherent cancellation strategy. Meanwhile, the rubber plate 2 is adopted to facilitate the installation of the secondary underwater sound emission unit 3.
In a specific embodiment, as shown in fig. 3 and 4, the cavity is formed by a blind hole 21 and a square groove 22 which are communicated along the thickness direction of the rubber sheet 2, the square groove 22 is positioned at the bottom of the blind hole 21, namely, the blind hole 21 is positioned at one side of the rubber sheet 2 facing the backing steel sheet 1, the opening of the blind hole 21 is positioned at one side surface of the rubber sheet 2 facing the backing steel sheet 1, the opening of the blind hole 21 is the opening of the cavity, and the square groove 22 and the backing steel sheet 1 are positioned at two sides of the blind hole 21; the blind hole 21 is used for fixedly mounting the core component of the secondary underwater sound emission unit 3, and the square groove 22 is used for fixedly mounting the radiation panel of the secondary underwater sound emission unit 3.
In the embodiment, the backing steel plate 1 is a rectangular steel plate, and the length of the rectangular steel plate is 1600mm, the width of the rectangular steel plate is 1500mm, and the thickness of the rectangular steel plate is 8mm; the rubber plate 2 is a square rubber plate 2, and the length and the width of the rubber plate 2 are 1500mm and the thickness is 50mm; the aperture of the blind hole 21 is 100mm, and the depth is 41mm; the side length of the square groove 22 is 150mm, and the depth is 4mm; the overall thickness of the secondary underwater sound emission unit 3 is 42mm; the core component of the secondary underwater sound emission unit 3 is of a cylindrical structure, the radiation panel of the secondary underwater sound emission unit 3 is of a square structure, the core component is installed in the blind hole 21 in a shape-fit mode, the radiation panel is installed in the square groove 22 in a shape-fit mode, the radiation panel is of a square structure, and the side length of the square is 150mm.
Further, for convenience of handling, as shown in fig. 1, the top of the backing steel plate 1 is provided with a hoisting hole 12 for threading a steel cable for hoisting, the number of the hoisting holes 12 may be two, and the aperture of the hoisting hole 12 may be 50mm. The secondary underwater acoustic emission array test device is conveniently hoisted into the sound-damping water pool by using the steel rope through the hoisting holes 12 for acoustic test.
In the above secondary underwater sound emission array test device, the calculation formula of the sound pressure P at a certain point in the sound field formed by the secondary underwater sound emission unit 3 is:
in the above formula, P is sound pressure; a is that i In relation to sound sources and media; r is (r) i A distance from the point to the ith secondary underwater sound emission unit 3; omega is the frequency; lambda is the wavelength at that frequency; j is an imaginary unit; t is time;deflecting the phase difference for the array;
when detecting the detection sound wave emitted by the active sonar, the array of the secondary underwater sound emitting units 3 emits sound waves with the same frequency and opposite phases, and counteracts the sound waves at a specific position by the principle of reverse coherence so as to realize the strategy of active noise elimination.
When in actual use, the sound wave intensity of the transmitting unit array and the direction angle of the sound wave transmitted by the array can be adjusted according to the intensity and the direction of the detected sound wave, and the array elements can be changed into circles, hexagons and the like according to the shape of the secondary underwater sound transmitting unit 3, but when judging the consistency of sound fields in different shapes, the consistency of the total radiation power of the array layout is ensured according to the following formula.
The calculation formula of the total radiation power W of the secondary underwater sound emission unit 3 is:
in the above formula, P is sound pressure; s is the total area of the radiation surface; ρ is the medium density; c is the speed of sound in the medium.
The sound pressure amplitude and the phase of each position on the same plane are completely consistent according to the definition of an ideal plane wave. By detecting the sound pressure difference values of some points in each section of the planar sound field formed by the array of the secondary underwater sound emitting units 3, a relationship curve of the sound pressure difference values and the distance as shown in fig. 5 can be obtained.
When the secondary underwater sound emission array test device adopts the specific parameters to carry out array layout, as shown in fig. 5, a better planar sound field can be formed at a position of 10m, the sound pressure difference value at the moment is reduced to 0.0015Pa, compared with the sound source intensity of 1Pa, the secondary underwater sound emission array test device is negligible, has good planar sound field consistency, and is beneficial to improving the sound damping performance of the active sound damping material.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The secondary underwater sound emission array test device is characterized by comprising a backing steel plate, a rubber plate and a secondary underwater sound emission unit;
the rubber plate is connected to one side surface of the backing steel plate in an adhesive mode, and a plurality of groups of cavities are distributed on one side of the backing steel plate in an array mode; each group of cavities consists of four cavities distributed in a diamond shape; the opening of the cavity faces the backing steel plate;
one secondary underwater sound emission unit is arranged in each cavity;
the back lining steel plate is provided with threading holes corresponding to the cavities one by one, and the threading holes are used for threading power lines and signal lines;
the secondary underwater sound emission unit can form a plane sound field with higher sound power by emitting sound waves with the same phase and the same frequency, so that coherent cancellation of the detected sound waves is realized.
2. The test device according to claim 1, wherein the cavity is formed by a blind hole and a square groove which are communicated in the thickness direction of the rubber plate, and the square groove is positioned at the bottom of the blind hole;
the opening of the blind hole is positioned on one side surface of the rubber plate, which faces the backing steel plate;
the blind hole is used for fixedly mounting the core component of the secondary underwater sound emission unit, and the square groove is used for fixedly mounting the radiation panel of the secondary underwater sound emission unit.
3. The test device of claim 1, wherein the backing steel plate is a rectangular plate having a length of 1600mm, a width of 1500mm, and a thickness of 8mm;
the rubber plate is a square rubber plate, the length and the width are 1500mm, and the thickness is 50mm.
4. A test device according to claim 3, wherein the blind hole has a diameter of 100mm and a depth of 41mm;
the side length of the square groove is 150mm, and the depth is 4mm;
the thickness of the secondary underwater sound emission unit is 42mm.
5. The test device of claim 1, wherein the threading aperture has a diameter of 60mm.
6. The test device of claim 1, wherein the top of the backing steel plate is provided with a hoist hole for threading a wire rope for hoist.
7. The test device of claim 6, wherein the lifting hole has a diameter of 50mm.
8. The test device of any one of claims 1-7, wherein the rubber sheet is provided with four sets of cavities in a rectangular distribution.
9. The test device of claim 8, wherein the spacing between cavities in each set of cavities is 265mm.
10. The test device according to claim 1, wherein the calculation formula of the sound pressure P at a point in the sound field formed by the secondary underwater sound emission unit is:
in the above formula, P is sound pressure; a is that i In relation to sound sources and media; r is (r) i Distance from the point to the ith secondary underwater sound emission unit; omega is the frequency; lambda is the wavelength at that frequency; j is an imaginary unit; t is time;deflecting the phase difference for the array;
the calculation formula of the total radiation power W of the secondary underwater sound emission unit is as follows:
in the above formula, P is sound pressure; s is the total area of the radiation surface; ρ is the medium density; c is the speed of sound in the medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311777889.XA CN117784107A (en) | 2023-12-21 | 2023-12-21 | Secondary underwater sound emission array test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311777889.XA CN117784107A (en) | 2023-12-21 | 2023-12-21 | Secondary underwater sound emission array test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117784107A true CN117784107A (en) | 2024-03-29 |
Family
ID=90397447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311777889.XA Pending CN117784107A (en) | 2023-12-21 | 2023-12-21 | Secondary underwater sound emission array test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117784107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118011367A (en) * | 2024-04-08 | 2024-05-10 | 中国电子科技集团公司第十五研究所 | Underwater sound experiment treatment equipment |
-
2023
- 2023-12-21 CN CN202311777889.XA patent/CN117784107A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118011367A (en) * | 2024-04-08 | 2024-05-10 | 中国电子科技集团公司第十五研究所 | Underwater sound experiment treatment equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN117784107A (en) | Secondary underwater sound emission array test device | |
| CN106569199B (en) | Transducer array of anti-frogman sonar | |
| CN108417195B (en) | Medium-low frequency sound absorption metamaterial structure based on resonant cavity | |
| CN212473812U (en) | Hull composite wave-blocking base based on acoustic black hole effect | |
| CN101183150A (en) | Time reversal transmitting focusing inverse beamforming method based on high-frequency time reversal array | |
| KR20180021605A (en) | Sound absorbing and insulating structures by tailoring sound velocities, and method of designing the sound absorbing and insulating structures | |
| KR20120072341A (en) | Acoustic underwater antenna, u-boat with the antenna and method for direction finding, position finding and/or classifying a target using the antenna | |
| RU2133047C1 (en) | Parametric echo-pulse sonar | |
| CN104180891A (en) | Method for measuring ocean sound transmission loss in real time based on sound matrix | |
| CN107728153B (en) | Underwater panoramic three-dimensional imaging towed body | |
| CN103971672A (en) | Underwater laser sound source with control directivity and control method thereof | |
| CN105203998A (en) | Sound detection array used for detecting low-altitude and slow-speed small targets | |
| CN108009376B (en) | Embedded signal adjusting plate array-based broadside array broadband signal enhancement and sound absorption method | |
| CN108279579A (en) | A kind of Large Underwater platform noise reduction system with class cochlear structures | |
| KR20110093765A (en) | Submarine antenna | |
| CN114104234B (en) | Cover layer diffuse reflection type sound absorption super-structure unit and super-structure | |
| US20120170414A1 (en) | Acoustic signal detector | |
| KR102051110B1 (en) | Device for active reflection cancellation | |
| CN117373418A (en) | Underwater large-scale active noise reduction unit array and underwater equipment | |
| CN113624330B (en) | Combined volumetric array for measuring radiation noise of underwater target and measuring method | |
| CN101149434B (en) | Multiple linear array combined acoustic array with super broad cover directivity | |
| CN110637516B (en) | Nonlinear active sonar multi-beam scanning method | |
| CN107995557B (en) | Sensing and noise elimination integrated hydrophone and implementation method thereof | |
| AU2013276738B2 (en) | Structure for an underwater vehicle such as a submarine | |
| CN201368917Y (en) | Plane receiving array capable of realizing wide-angel beam scanning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |