Multi-channel underwater acoustic detection array device

Abstract

The utility model relates to a multichannel underwater sound detection array device, which comprises a cabin body and a plurality of groups of underwater sound detection mechanisms arranged on the same end face of the cabin body. Each group of underwater sound detection mechanism comprises a plurality of piezoelectric hydrophones, the plurality of piezoelectric hydrophones of each group of underwater sound detection mechanism are arranged in a regular octagon shape, the symmetric centers of the plurality of groups of underwater sound detection mechanisms coincide, and the distances between any two groups of adjacent underwater sound detection mechanisms are equal. The piezoelectric hydrophones are arranged in multiple layers from inside to outside, and are expanded in a central symmetry manner, so that the acoustic receiving performance can be effectively optimized. The structural design of the multi-layer piezoelectric hydrophone enables the array to have higher sensitivity and accuracy, and acoustic signals of an underwater target can be effectively captured. According to the utility model, by optimizing the array layout and enhancing the acoustic signal processing capability, the spatial resolution of the array is obviously improved, the mutual coupling effect is effectively reduced, the blind area is reduced, and the underwater acoustic sensor is suitable for the fields of underwater acoustic detection, marine environment monitoring and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater acoustic detection, in particular to a multi-channel underwater acoustic detection array device. Background Art

[0002] Sound waves have a wide range of applications in the fields of underwater target detection, underwater acoustic communication, underwater acoustic positioning and navigation, seabed topography measurement, medical ultrasonic imaging, industrial non-destructive testing, etc. Underwater acoustic imaging is based on the measurement technology of piezoelectric hydrophone arrays. By measuring the signal phase differences of sound waves arriving at each piezoelectric hydrophone within a certain space, the position of the sound source is determined according to the phased array principle, the amplitude of the sound source is measured, and the spatial distribution of the sound source is displayed in the form of an image. The realization of underwater sound source localization technology is closely related to the array design and layout of piezoelectric hydrophones. Different array forms include linear arrays, circular arrays, and two-dimensional layouts, each with unique spatial sampling characteristics and signal processing requirements. The existing piezoelectric hydrophone arrays have low sensitivity and accuracy, insufficient spatial resolution, and large monitoring blind areas. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a multi-channel underwater acoustic detection array device, which solves the technical problems of low sensitivity and accuracy of the existing piezoelectric hydrophone arrays and insufficient spatial resolution.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the multi-channel underwater acoustic detection array device of the utility model includes a cabin body and multiple groups of underwater acoustic detection mechanisms. Multiple groups of the underwater acoustic detection mechanisms are all arranged on the same end face of the cabin body; each group of the underwater acoustic detection mechanisms includes multiple piezoelectric hydrophones, and the multiple piezoelectric hydrophones of each group of the underwater acoustic detection mechanisms are arranged in a regular octagon. The symmetry centers of multiple groups of the underwater acoustic detection mechanisms coincide, and the distance between any two adjacent groups of the underwater acoustic detection mechanisms is equal.

[0007] Optionally, the multi-channel underwater acoustic detection array device further includes a camera, and the camera is arranged on the end face of the cabin body and located at the symmetry center of multiple groups of the underwater acoustic detection mechanisms.

[0008] Optionally, the cabin body includes an installation panel and a housing that are connected to each other;

[0009] The installation panel is in a regular octagon shape, and multiple piezoelectric hydrophones are all arranged on the installation panel. The cables connecting the piezoelectric hydrophones are hermetically bundled and fixed inside the housing.

[0010] Optionally, a plurality of mounting holes are formed in the mounting panel, the piezoelectric hydrophone is sleeved in the mounting holes, opening gaskets are arranged at both ends of the piezoelectric hydrophone, and a fixing nut is arranged at one end of the piezoelectric hydrophone located inside the housing.

[0011] Optionally, a plurality of strip holes communicating with the inside of the housing are formed in the mounting panel.

[0012] Optionally, the plurality of strip holes are symmetrically arranged with respect to the symmetry center of any group of the underwater acoustic detection mechanisms.

[0013] Optionally, the cross section of the housing is a regular octagon.

[0014] Optionally, each group of the underwater acoustic detection mechanisms can be individually turned on or off.

[0015] Optionally, the total number of the piezoelectric hydrophones of multiple groups of underwater acoustic detection mechanisms is 64.

[0016] Optionally, a lifting ring and a connecting piece are detachably arranged on the side surface of the cabin body, and handles are arranged in pairs on the end surface of the cabin body.

[0017] (III) Beneficial effects

[0018] The arrangement of the piezoelectric hydrophones is divided into multiple layers from the inside to the outside and adopts central symmetry expansion, which can effectively optimize the acoustic reception performance. The structural design of the multi-layer piezoelectric hydrophones enables the array to have higher sensitivity and accuracy, and can effectively capture the acoustic signals of underwater targets. By optimizing the array layout and enhancing the acoustic signal processing ability, the present invention significantly improves the spatial resolution of the array, effectively reduces the mutual coupling effect, reduces the occurrence of blind areas, and is applicable to fields such as underwater acoustic detection and marine environment monitoring. Description of the drawings

[0019] Figure 1 is the front view of the multi-channel underwater acoustic detection array device of the present invention;

[0020] Figure 2 is the three-dimensional view of the multi-channel underwater acoustic detection array device of the present invention;

[0021] Figure 3 is the side view of the multi-channel underwater acoustic detection array device of the present invention;

[0022] Figure 4 is the installation schematic diagram of the piezoelectric hydrophone of the multi-channel underwater acoustic detection array device of the present invention.

[0023]

Description of the reference numerals

[0024] 1: Cabin body; 11: Mounting panel; 12: Housing;

[0025] 2: Piezoelectric hydrophone; 3: Strip-shaped hole; 4: Camera; 5: Suspension ring; 6: Connector; 7: Handle. Detailed implementation mode

[0026] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below in conjunction with the accompanying drawings through specific implementation modes. Among them, the orientation nouns such as "upper", "lower", etc. mentioned in this article are based on Figure 1 the orientation for reference.

[0027] Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present utility model and to be able to convey the scope of the present utility model completely to those skilled in the art.

[0028] As Figure 1 shown, the present utility model provides a multi-channel underwater acoustic detection array device, aiming to optimize the acoustic reception performance and improve the spatial resolution, and provide support for the efficient and accurate detection of underwater sound source targets by the sound source localization algorithm. The multi-channel underwater acoustic detection array device includes a cabin body 1 and multiple groups of underwater acoustic detection mechanisms. The multiple groups of underwater acoustic detection mechanisms are all arranged on the same end face of the cabin body 1 and are used to receive underwater acoustic signals. Among them, each group of underwater acoustic detection mechanisms includes multiple piezoelectric hydrophones 2. The piezoelectric hydrophones 2 convert the underwater acoustic wave signals into electrical signals through their unique piezoelectric effect, and these signals can be transmitted to the signal processing unit for further analysis and processing. The multiple piezoelectric hydrophones 2 of each group of underwater acoustic detection mechanisms are arranged at intervals in a regular octagon, forming a closed regular octagon structure. The symmetry centers of the multiple groups of underwater acoustic detection mechanisms coincide. The sides of the regular octagons formed by each underwater acoustic detection mechanism correspond to each other and are parallel. The distances from the symmetry center to the vertices of each regular octagon increase in sequence, and the distances between the sides of the regular octagons formed by any two adjacent groups of underwater acoustic detection mechanisms are equal. The arrangement of the piezoelectric hydrophones 2 is divided into multiple layers from the inside to the outside and is extended in a centrosymmetric manner, which can effectively optimize the acoustic reception performance. The structural design of the multiple layers of piezoelectric hydrophones 2 enables the array to have higher sensitivity and accuracy, and can effectively capture the acoustic signals of underwater targets. The present utility model significantly improves the spatial resolution of the array by optimizing the array layout and enhancing the acoustic signal processing ability, effectively reduces the mutual coupling effect, reduces the occurrence of blind areas, and is applicable to fields such as underwater acoustic detection and marine environment monitoring.

[0029] See Figure 1, the multi-channel underwater acoustic detection array device further includes a camera 4. The camera 4 is arranged on the end face of the cabin body 1 and is located at the symmetry center of multiple groups of underwater acoustic detection mechanisms, and is used to collect optical perception information underwater. The camera 4 not only enhances the device's comprehensive monitoring ability of the underwater environment, but also provides important visual support for the sound source localization algorithm. The camera 4 captures images and videos of the underwater environment through an optical sensor, and these data can be combined with acoustic signals to provide more accurate and comprehensive underwater target localization and identification.

[0030] As Figure 2 and Figure 3 shown, the cabin body 1 includes a connected mounting panel 11 and a housing 12. The mounting panel 11 is in the shape of a regular octagon and matches the shape of the underwater acoustic detection mechanism. Multiple piezoelectric hydrophones 2 are all arranged on the mounting panel 11. All the wiring and cables of the piezoelectric hydrophones 2 are hermetically bundled and fixed, and are reasonably arranged inside the octagonal cabin body 1 to avoid damage to the cables caused by being hit or entangled by underwater objects, and also reduce the influence of external factors that may cause interference on the acoustic and optical perception signals.

[0031] Furthermore, referring to Figures 1-4 , a plurality of mounting holes are provided on the mounting panel 11. Each piezoelectric hydrophone 2 corresponds to one mounting hole. The piezoelectric hydrophone 2 is sleeved in the mounting hole. Open gaskets are provided at both ends of the piezoelectric hydrophone 2, and a fixing nut is provided at the end of the piezoelectric hydrophone 2 located inside the housing 12. Specifically, each piezoelectric hydrophone 2 is fixed on the mounting hole of the cabin body 1. The fixing method of the piezoelectric hydrophone 2 adopts a sunken hole design on the panel. An open gasket of the same size as the sunken hole is used on the front, and an open gasket and a nut are used on the back to ensure the stability and sealing performance during underwater operation. The diameter of the mounting hole on the panel is larger than the diameter of the piezoelectric hydrophone 2 to facilitate the disassembly and assembly of the piezoelectric hydrophone 2. The design of the mounting hole ensures the fixation of the piezoelectric hydrophone 2 and prevents damage or dropping of the piezoelectric hydrophone 2 caused by factors such as water pressure and external object impact.

[0032] Referring to Figure 1 , a plurality of strip-shaped holes 3 communicating with the inside of the housing 12 are provided on the mounting panel 11, which are used to balance the pressure difference inside and outside the housing 12, ensure that the cabin body 1 will not be damaged due to excessive water pressure in deep water, and can effectively cope with the possible high water pressure influence in the deep water environment. The multiple strip-shaped holes 3 are symmetrically arranged with respect to the symmetry center of any group of underwater acoustic detection mechanisms.

[0033] Referring to Figures 1-3 , the cross-section of the housing 12 is in the shape of a regular octagon and matches the shape of the panel. The design of the octagonal cabin body 1 has the advantages of strong stability, firm structure, high space utilization rate, small fluid resistance and high safety

[0034] Preferably, each group of underwater acoustic detection mechanisms can be individually turned on or off. In a specific implementation, the total number of piezoelectric hydrophones 2 in multiple groups of underwater acoustic detection mechanisms is 64, and the 64 piezoelectric hydrophones 2 are evenly arranged on the regular octagon-shaped cabin 1 at equal intervals. The piezoelectric hydrophones 2 are arranged in two or more layers from the inside to the outside and are symmetrically extended from the center to optimize the acoustic reception performance. By turning on / off the piezoelectric hydrophones 2 of each group of underwater acoustic detection mechanisms, the 64 channels can be switched to 32 channels or 16 channels, and they can still work properly. The channels of the piezoelectric hydrophones 2 can be flexibly changed to meet different usage scenarios.

[0035] See Figure 2 and Figure 3 , on the side of the cabin 1, a lifting ring 5 and a connecting piece 6 are detachably arranged, and on the end face of the cabin 1, a pair of handles 7 are arranged to facilitate the disassembly and assembly of the cabin 1.

[0036] Compared with other forms, the array layout method of the piezoelectric hydrophones 2 of the present utility model has enhanced spatial resolution: it provides more uniform angular coverage, which helps to accurately capture the positions of multiple sound sources; it reduces the spatial aliasing effect: the optimized layout reduces the influence of multi-path reflections and interference on the positioning accuracy; it collects multi-directional information: it can simultaneously collect sounds from multiple directions, which is significantly helpful for the identification of multiple sound sources in complex environments; the channels of the piezoelectric hydrophones 2 can be flexibly changed: the 64 channels can be switched to 32 channels or 16 channels, and they can still work properly, meeting different scenarios; the added central point camera 4 not only improves the sensing ability of the device but also further enhances the comprehensive monitoring and analysis ability of the underwater environment.

[0037] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise specifically defined.

[0038] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and defined, when a first feature is "on" or "under" a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is "above", "over" or "on top of" a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it merely means that the horizontal height of the first feature is higher than that of the second feature. When a first feature is "under", "below" or "beneath" a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it merely means that the horizontal height of the first feature is lower than that of the second feature.

[0040] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples", etc., means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0041] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A multi-channel underwater acoustic detection array device, characterized in that: The multi-channel hydroacoustic detection array device comprises a cabin (1) and a plurality of groups of hydroacoustic detection mechanisms, wherein the plurality of groups of hydroacoustic detection mechanisms are arranged on the same end surface of the cabin (1); each group of the hydroacoustic detection mechanisms comprises a plurality of piezoelectric hydrophones (2), and the plurality of piezoelectric hydrophones (2) of each group of the hydroacoustic detection mechanisms are arranged in a regular octagon, the symmetry centers of the plurality of groups of the hydroacoustic detection mechanisms coincide, and the spacing between any two adjacent groups of the hydroacoustic detection mechanisms is equal.

2. The multi-channel underwater acoustic detection array device according to claim 1, characterized in that: The multi-channel hydroacoustic detection array device further comprises a camera (4), wherein the camera (4) is arranged on the end surface of the cabin (1) and is located at the symmetric center of the multiple groups of hydroacoustic detection mechanisms.

3. The multi-channel underwater acoustic detection array device according to claim 1, characterized in that: The cabin (1) comprises a mounting panel (11) and a shell (12) connected to each other; The installation panel (11) is in the shape of a regular octagon, and a plurality of the piezoelectric hydrophones (2) are arranged on the installation panel (11), and the cables connecting the piezoelectric hydrophones (2) are sealed, bound and fixed inside the housing (12).

4. The multi-channel underwater acoustic detection array device according to claim 3, characterized in that: The mounting panel (11) is provided with a plurality of mounting holes, the piezoelectric hydrophone (2) is sleeved in the mounting holes, both ends of the piezoelectric hydrophone (2) are provided with open gaskets, and one end of the piezoelectric hydrophone (2) located in the housing (12) is provided with a fixing nut.

5. The multi-channel underwater acoustic detection array device according to claim 3, characterized in that: The installation panel (11) is provided with a plurality of strip-shaped holes (3) which are in communication with the interior of the housing (12).

6. The multi-channel underwater acoustic detection array device according to claim 5, characterized in that: The plurality of strip-shaped holes (3) are symmetrically arranged about the symmetry center of any group of the hydroacoustic detection mechanisms.

7. The multi-channel underwater acoustic detection array device according to claim 3, characterized in that: The cross section of the shell (12) is a regular octagon.

8. The multi-channel underwater acoustic detection array device according to claim 1, characterized in that: Each group of the hydroacoustic detection mechanisms can be opened or closed individually.

9. The multi-channel underwater acoustic detection array device according to claim 1, characterized in that: The total number of the piezoelectric hydrophones (2) of the multiple groups of water acoustic detection mechanisms is 64.

10. The multi-channel underwater acoustic detection array device according to claim 1, characterized in that: The side surface of the cabin body (1) is detachably provided with a lifting ring (5) and a connecting piece (6), and the end surface of the cabin body (1) is provided with handles (7) in pairs.

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