An acoustic deterrent device

Abstract

The utility model discloses an acoustic driving device. The device comprises: a power supply, a dry end module electrically connected with the power supply, a wet end module typically connected with the dry end module; the dry end module comprises a transformer, a power amplifier, an industrial control computer, a digital acquisition card; the wet end module comprises an acoustic driving subsystem and an environment sensor system; wherein, the transformer is used for converting the mains input of the power supply into the safe voltage required by the wet end module and the like. The utility model discloses the design of the dry end and the wet end module is optimized, and in combination with the unique transducer array structure, the environment sensing system and the convenient adjustment fixing mode and the like, realizes the acoustic driving function of high efficiency, precision, stability and strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of acoustic repelling technology, and in particular to an acoustic repelling device. Background Technology

[0002] In many fields, such as marine aquaculture, port protection, and aquatic resource protection, there is an urgent need for technologies and devices that can efficiently, accurately, and reliably drive away specific organisms (such as certain marine organisms, birds, and other species that may disturb or damage related facilities or resources).

[0003] Traditional methods of repelling organisms have many limitations. For example, while some physical barriers can prevent organisms from entering specific areas to a certain extent, they are often inconvenient to install, costly, and ineffective against highly mobile organisms. Chemical repellents may have adverse effects on the surrounding ecological environment, posing safety hazards and environmental problems, and easily disrupting the ecological balance. Conventional acoustic repellent devices have relatively simple sound wave emission modes and limited coverage, making it difficult to flexibly adapt and precisely control them according to the behavioral habits of different organisms and complex environmental conditions. This results in unsatisfactory repellent effects, and they lack sufficient stability and adaptability in the face of complex and changing on-site environments.

[0004] With the advancement of technology, the requirements for acoustic repellent devices are becoming increasingly stringent. On the one hand, the device needs to output high-quality acoustic signals with sufficient intensity and precise frequency control to ensure an effective repellent effect on target organisms. On the other hand, considering the complex operating environment, the device must possess excellent environmental sensing capabilities, capable of real-time monitoring of key environmental parameters such as salinity and turbidity, thereby adjusting the acoustic repellent strategy promptly according to environmental changes to ensure the continuity and reliability of the repelling effect. Simultaneously, the device's stability, safety, and ease of maintenance and adjustment are also crucial to reduce operating costs and improve its feasibility and practicality in real-world applications. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose an acoustic driving device that aims to overcome the shortcomings of the prior art. Through optimized dry and wet end module design, combined with a unique transducer array structure, environmental sensing system and convenient adjustment and fixing methods, it achieves efficient, accurate, stable and highly adaptable acoustic driving function, meeting the urgent needs of various related fields for such devices.

[0006] According to one aspect of the present invention, an acoustic repelling device is provided, the device comprising: a power supply, a dry-end module electrically connected to the power supply, and a wet-end module typically connected to the dry-end module. The dry-end module includes a transformer, a power amplifier, an industrial control computer, and a digital acquisition card; The wet-end module includes an acoustic driving subsystem and an environmental sensor system; The transformer is used to convert the mains power input to the safe voltage required by the wet-end module; the industrial control computer is electrically connected to the power amplifier and the digital acquisition card respectively; the digital acquisition card is electrically connected to the environmental sensing subsystem and the acoustic driving subsystem. The acoustic driving subsystem includes at least one transducer array, which includes a plurality of transducers arranged in a fan shape around a center, and at least one central piezoelectric plate is provided between adjacent transducers. The environmental sensing subunit includes at least a salinity meter and an optical scattering turbidity sensor.

[0007] In the aforementioned technical solution, the acoustic repelling device, through its modular architecture (dry-end control and power supply + wet-end execution and sensing) and a structural design of a fan-shaped array + central piezoelectric element, comprehensively achieves the core technical effects of "environmental adaptation," "high acoustic energy focusing," "high operational safety," "intelligent control," and "performance self-optimization," significantly improving the efficiency, effectiveness, reliability, and environmental adaptability of underwater acoustic repelling. The isolation and step-down design of the dry-end transformer ensures the inherent safety of the wet-end underwater equipment in humid / underwater environments, laying the foundation for the long-term, reliable, and maintenance-free (relatively) operation of the entire system. The power amplifier provides stable and reliable high-power drive. The industrial control computer, as the core, seamlessly integrates and controls all key subsystems such as energy conversion (power amplifier), sound wave generation and directionality (transducer array), and environmental sensing (sensors) through a digital acquisition card, achieving centralized management, coordinated operation, and data processing, providing a platform for intelligence and adaptation. Salinity and turbidity data are not merely for monitoring but also crucial inputs that directly drive the optimization of acoustic parameters. The system performance (effective range and sound pressure level in the target area) is no longer fixed, but is adaptively adjusted according to the environment in order to achieve the optimal performance.

[0008] In some embodiments, the transducer array includes an arc-shaped support and a plurality of transducers; The outer side of the arc-shaped bracket has a C-shaped groove; each transducer has a threaded connection end and a rubber slider that fits into the groove at the tail end; and when the rubber slider is embedded in the groove, the tightness between the transducer and the bracket is adjusted by a nut that engages with the thread.

[0009] In the above technical solution, the rubber slider at the tail end of the transducer is embedded in the C-shaped groove of the bracket. The transducer is slid along the groove to a preset or adjusted position. The nut is tightened, and the transducer is firmly pressed onto the bracket through the threads. At this time, the rubber slider is pressed and fixed in the groove. The design of the C-shaped groove and the rubber slider, combined with the threaded fastening, ensures that each transducer can be accurately positioned in the preset theoretical position of the arc-shaped bracket and can be firmly locked. In the pressed state, the rubber slider not only provides fixing force, but its elasticity also plays a damping and vibration reduction role. It can effectively absorb the high-frequency micro-displacement caused by the transducer's own operating vibration or the impact of external water flow, preventing the transducer from wobbling slightly during sound wave emission. Such micro-displacement will seriously damage the phase consistency of the beam, resulting in main lobe broadening, side lobe elevation, and poor directivity (i.e., non-concentration of sound energy). Rubber damping significantly improves the stability and directivity of the beam. Threaded fasteners provide mechanical locking force, which, combined with rubber damping, effectively resists corrosion, biofouling, and structural creep or loosening that may result from continuous water flow impact in the long-term underwater environment. This ensures the long-term stability of the array geometry and transducer position, thus maintaining a continuous and predictable acoustic repulsion effect. The damping characteristics of the rubber sliders make the entire transducer more resistant to mechanical shocks (such as installation collisions or object impacts) and vibrations caused by water turbulence, reducing the risk of transducer damage or positional displacement. Installers can easily "slide" the transducers into the grooves and freely adjust their angle, position, and spacing along the arc without complex positioning fixtures or drilling holes individually, shortening installation time. Furthermore, transducer positions can be fine-tuned on-site based on actual acoustic test results to achieve optimal beamforming, and transducers can be easily added, removed, or rearranged to adapt to different coverage angles, focusing distances, or repulsion target requirements (e.g., changing from a 180° fan shape to a more concentrated 120° fan shape).

[0010] In some embodiments, the included angle between adjacent transducers satisfies the following formula:

[0011] In the formula, It is the angle between adjacent transducers with the intersection of their radiation axes as the center, and ; This indicates the included angle rounded down. The physical angle of the arc-shaped support; The number of transducers; the angle between the piezoelectric element and the adjacent transducer. for / 2. In the above technical solution, the total physical angle γ of the arc-shaped support is evenly distributed to the included angle θ (rounded) between adjacent transducers. Uniform spacing is the foundation of the beamforming algorithm, ensuring the symmetry and phase controllability of the array. θ > 10° avoids grating lobes: when the element spacing is too large (corresponding to a large θ), high-intensity sidelobes are generated in non-dominant directions, dispersing acoustic energy (as shown in the figure). θ > 10° suppresses grating lobes by limiting the maximum spacing; while too small a spacing leads to transducer acoustic field coupling, creating directional blind spots. 10° is an empirical threshold that balances beamwidth and sidelobe levels, ensuring that acoustic energy is highly focused on the main lobe, improving deflection efficiency. The piezoelectric element is located at the angle bisector of the angle between the two transducers. It fills the acoustic gap between the transducers and compensates for the non-uniformity of the sound field caused by the discrete arrangement. As an auxiliary sound source, it can optimize the beam sidelobe suppression ratio (SLR) and enhance the directivity of the main lobe. The piezoelectric element's resonant frequency is designed differently from that of the main transducer, which can broaden the effective bandwidth of the system.

[0012] In some embodiments, the surface of the groove is provided with an angle scale.

[0013] Even with the calculation formulas in the above technical solutions, manual installation still requires measuring the angular position of each transducer, and the cumulative error may exceed ±1° (leading to sidelobe deterioration of more than 3dB). By directly laser-engraving theoretically calculated angle scales (e.g., a main scale every 10°, and a sub-scale every 1°) on the slide surface, installers only need to align the transducer sliders with the scale lines to achieve zero cumulative error in transducer spacing; combined with threaded fastening, positioning accuracy is greatly improved.

[0014] In some embodiments, the included angle between adjacent transducers with the intersection of their radiation axes as the center ranges from 30° to 45°; the number of transducers is 3 to 6.

[0015] In the above technical solutions, when the included angle between adjacent transducers with the intersection of the transducer radiation axes as the center is less than 30°, the included angle of the piezoelectric sheet is too small (δ=θ / 2≤15°), which cannot effectively couple the sound field and the side lobes deteriorate sharply; when it exceeds 45°, the lateral shear force of the rubber slider in the arc groove exceeds the standard, and there is a risk of detachment from the groove; and two transducers cannot form a controllable beam (only interference fringes); more than seven transducers double the cost, but the array gain only increases by 2dB (diminishing marginal effect).

[0016] In some embodiments, the transducer includes a transducer body and a housing disposed outside the body; The shell is made of alloy material and has an organic silicon coating on its surface.

[0017] In the above technical solution, the transducer is encapsulated in a corrosion-resistant cavity, reducing underwater connection points and lowering the failure rate. In addition, traditional metal shells are prone to thickness resonance at 20kHz, which leads to acoustic distortion. The preferred shell material is stainless steel, with a thickness of 0.6mm to 0.8mm. The silicone coating, as a damping layer, can effectively reduce resonance.

[0018] In some embodiments, the dry-end module and the wet-end module are connected via an umbilical cable.

[0019] Among the above technical solutions, the umbilical cable is more suitable for long-term operation in seawater conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the hardware framework of an embodiment of an acoustic driving device according to this utility model; Figure 2 This is a schematic diagram of the transducer array structure of an embodiment of an acoustic driving device according to this utility model; Figure 3 This is an embodiment of an acoustic repelling device according to the present invention. Figure 2 Schematic diagram of the AA section; Figure 4 This is a schematic diagram of the transducer structure of an embodiment of an acoustic driving device according to this utility model; Figure 5 This is a schematic diagram of the arc-shaped bracket scale of an embodiment of an acoustic driving device according to this utility model; Figure 6 This is a complete schematic diagram of the transducer array of an embodiment of an acoustic driving device according to this utility model; Figure 7 This is a schematic diagram of the beam coverage of an embodiment of an acoustic driving device according to this utility model; Figure 8 This is a schematic diagram of the UW30 manufactured by Electro-Voice (EV) of the United States, which is an embodiment of an acoustic driving device according to this utility model. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are only for illustrating the present invention and do not limit the scope of the present invention. Similarly, the following embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0023] Example 1 Please see Figure 1 An acoustic deterrent device is disclosed, comprising: a power supply, a dry-end module electrically connected to the power supply, and a wet-end module typically connected to the dry-end module; in this embodiment, the dry-end module and the wet-end module are connected via an umbilical cable. The deployment connection system consists of the umbilical cable and an adaptive anchoring mechanism. The umbilical cable has a composite cable structure (power line + optical fiber + tensile steel wire), a double-layer polyurethane sheath, and a tensile strength ≥10 tons. The adaptive anchoring mechanism employs a pneumatic buoyancy adjustment chamber, and an acoustic positioning beacon calibrates the suspension height (5-30m) (not shown in the figure, but can be found in existing technology settings, and will not be elaborated further). The dry-end module includes a transformer, a power amplifier, an industrial control computer, and a digital acquisition card; the wet-end module includes an acoustic repellency subsystem and an environmental sensor system; wherein, the transformer is used to convert the mains power input to the safe voltage required by the wet-end module; the industrial control computer is electrically connected to the power amplifier and the digital acquisition card respectively; the digital acquisition card is electrically connected to the environmental sensor subsystem and the acoustic repellency subsystem; the acoustic repellency subsystem includes at least one transducer array, which includes a plurality of transducers arranged in a fan shape around a center, and at least one central piezoelectric element is provided between adjacent transducers; the environmental sensor subunit includes at least one salinity meter and an optical scattering turbidity sensor.

[0024] In this embodiment, please refer to Figure 2 The transducer array includes an arc-shaped support 1 and a plurality of transducers 2; see also Figure 3 , Figure 4 The outer side of the arc-shaped bracket 1 has a C-shaped groove 11; the surface of the connecting end 25 of each transducer 2 is provided with a thread (not shown in the figure), and the tail end of the connecting end 25 is provided with a rubber slider 24 that fits into the groove 11; and when the rubber slider 24 is embedded in the groove 11, the tightness between the transducer 2 and the bracket 1 is adjusted by a nut 23 in conjunction with the thread.

[0025] In this embodiment, please refer to Figure 3 , Figure 4The transducer 2 includes a transducer body 21 and a housing 22 disposed on the outside of the body; the housing 22 is made of alloy material and its surface is coated with an organosilicon coating (not shown in the figure). The wiring 26 of the transducer 3 is led out from the surface of the housing 22, and the specific wiring method can be set according to actual needs, which will not be described in detail. In addition, traditional metal housings are prone to thickness resonance at 20kHz, resulting in sound wave distortion; preferably, the housing material is stainless steel, and the thickness is designed to be 0.6mm~0.8mm; the organosilicon coating, as a damping layer, can effectively reduce resonance.

[0026] In this embodiment, please refer to Figure 5 The surface of the slide groove 1 is provided with angle scale 12.

[0027] In this embodiment, the complete transducer array is shown in Figure 6. The arc-shaped support 1 is connected to the main rod 4 via several connecting rods 5, which can be detached or welded together. A counterweight 6 is provided at the bottom of the main rod 4 to adjust the front-to-back balance of the transducer array and to assist in the stability of the transducer array underwater. The central piezoelectric element 3 is positioned between adjacent transducers 2 and is connected using the same housing as the transducers 2.

[0028] In this embodiment, please refer to Figure 7 The included angle between adjacent transducers 2 Satisfy the following formula:

[0029] In the formula, It is the angle between adjacent transducers with the intersection of their radiation axes as the center, and ; This indicates the included angle rounded down. The physical angle of the arc-shaped support; The number of transducers; the angle between the piezoelectric element and the adjacent transducer. for / 2. The purpose of this formula is to control the transducer angle, aiming to achieve a coverage angle ≥180°. It is not difficult to see from the structural diagram of this case that the angle of the physical arc-shaped support... Less than 180°. The transducer array includes several transducers 2 (primary acoustic emission units) and at least one central piezoelectric element 3 (auxiliary acoustic element for filling beam gaps, enhancing coverage, and beam control) disposed between adjacent transducers 2. The key to the design is to extend acoustic coverage to 180° or more with limited physical support angles through the coordinated work of the transducers and piezoelectric elements. Based on the above requirements, the coverage principle is as follows: 1. Coverage Angle Requirements and Design Principles Coverage angle formula: To achieve a coverage angle ≥180°, the physical support angle... ( (<180°) and the transducer beamwidth β must satisfy the following relationship:

[0030] in: For the physical angle of the curved support (e.g., if the support is 120°, then...). = 120°). The half-power beamwidth of a single transducer mounted on both sides depends on the transducer size and operating frequency.

[0031] The function of the central piezoelectric element: The piezoelectric element (usually small, but with a potentially wider beamwidth) is placed between adjacent transducers to fill the gaps between transducer beams, ensuring coverage continuity, and for beamforming (such as phase control) to extend the effective coverage angle.

[0032] Assume there are N transducers (in this embodiment, the UW30 manufactured by Electro-Voice (EV) is used; see the appearance diagram). Figure 8 ), evenly distributed in In terms of angle, it refers to the included angle between adjacent transducers. A central piezoelectric element is placed in each gap, thus positioning the piezoelectric element at the midpoint of the transducer angle. The angle between the piezoelectric element and the adjacent transducer is... / 2. To avoid coverage blind spots, the angular spacing between adjacent elements (transducers or piezoelectric elements) should be less than or equal to the element's beamwidth β to ensure good beam overlap (generally required). Increase the number of transducers. It can reduce This improves coverage continuity, but increases cost and complexity. Determined by the transducer design. Typical underwater driving transducers (frequency 20-50 kHz) The range is approximately 60° to 90°; it can reach 120° at low frequencies (10 kHz) and may be as narrow as 30° at high frequencies (100 kHz). The range should be determined through simulation or actual measurement before design. Bracket angle It is a known constraint ( <180°), needs to be selected according to the mechanical design.

[0033] 2. The angle between adjacent transducers ( ) It is the angle between adjacent transducers when viewed from the center of the circle. ,in This represents the number of transducers. It should be less than or equal to the transducer beamwidth. Right now ≤ This ensures sufficient beam overlap between adjacent transducers to provide continuous coverage. If Wider (e.g.) (≈ 90°) The angle can be larger (e.g., 40°~60°), reducing the number of transducers. If Narrower (e.g.) (≈ 60°) A smaller angle (e.g., 20°~30°) is required, necessitating more transducers. Due to limitations in transducer size and installation space, typically... ≥ 10° to avoid physical interference.

[0034] Assumption = 120°, = 70° (satisfies) + = 190°>180°).

[0035] If N = 4, then = 120° / (4-1) = 40° = 40°< = 70°, feasible).

[0036] If N = 5, then = 120° / (5-1) = 30° (better overlap, but more expensive).

[0037] if = 150°, = 40° (satisfies) + = 190°>180°), then It should be ≤40°, for example, when N = 4. = 50° = 50°> = 40°, there may be a gap, requiring piezoelectric compensation). Generally A common starting point is approximately 30° to 45° (to balance coverage and cost). N is typically 3 to 6 (N needs to be larger when γ is small).

[0038] 3. The angle between the piezoelectric element and the transducer ( ) It is the angle between the central piezoelectric element and the adjacent transducer. Since the piezoelectric element is located at the midpoint between the transducers... . The size should be small to ensure that the piezoelectric element effectively fills the transducer gap. Ideally, ≤ However, piezoelectric elements are typically smaller, with a narrower beamwidth. It may be wider (e.g., 70°-120°). Because... ,and ≤ ,therefore Typically small (e.g., 10°-30°). Therefore, the piezoelectric element's role is to cover the "dead zone" between the transducer beams, thus... It should not be too large (otherwise, multiple piezoelectric elements or a larger beamwidth would be required). Generally ≈ 10°~ 25° (corresponding to) = 20°~50°).

[0039] 4. Overall Design Steps Determine the bracket angle Select based on mechanical constraints (For example = 120°, 135° or 150°), ensure <180° (It should be noted that the purpose of designing it as an arc with an angle of less than 180° is to reduce the volume while achieving a coverage area of ​​more than 180°).

[0040] Estimating transducer beamwidth Based on operating frequency and transducer size: ≈ k·λ / D, where λ is the wavelength, D is the transducer aperture, and k is a constant (approximately 50-70 for a -3 dB width). Typical value: If the frequency is 30 kHz (λ ≈ 5 cm), D = 5 cm, then ≈ 60°; if D = 3 cm, ≈ 100°. Verification + ≥ 180°; if not, increase the angle. (Reduce frequency or reduce transducer size) or increase .

[0041] Select the number of transducers N: Calculate ,make sure ≤ Starting point: N = 4-5 ( When =120°), N = 3-4 ( = at 150°).

[0042] Piezoelectric elements are installed: at least one central piezoelectric element is installed in each transducer gap. Typically, no additional optimization is needed unless the piezoelectric element has a special function.

[0043] Coverage verification: Total coverage angle ≈ + (Considering only the transducer) piezoelectric elements can further improve continuity. Beam patterns are simulated using acoustic simulation software (such as COMSOL or Bellhop) to ensure coverage ≥180° with no significant sidelobes.

[0044] 5. Precautions Impact of the environmental sensing subsystem: Salinity meters and turbidity sensors provide environmental parameters that may affect sound velocity and attenuation, thus indirectly affecting the effective beamwidth. These data should be considered during the design phase to adjust the drive signals (e.g., through real-time adaptation via an industrial control computer and digital acquisition card).

[0045] Frequency selection: Low frequencies (10-30 kHz) provide a wider beam ( Large beams are easy to cover, but may reduce driving efficiency; high-frequency (50-100 kHz) beams are narrow and require more components.

[0046] Component spacing: In addition to angular spacing, the radius of curvature R is also important. A small R results in a small physical spacing, which may cause acoustic coupling; a large R results in more uniform coverage.

[0047] Number of piezoelectric elements: If Narrow or To reduce the size, the number of piezoelectric elements can be increased (e.g., two per gap) to decrease the overall size. .

[0048] In this embodiment, In the calculation, rounding down is chosen. The reason is that rounding down (to a smaller angle) reduces the angle between adjacent components, increases beam overlap, and reduces the risk of coverage blind spots. While rounding up (to a larger angle) can reduce the number of components and simplify the design, it may exceed the beamwidth β, leading to coverage discontinuities. Therefore, rounding down is preferred here (as in the calculated value). =36.2° (choosing 36° instead of 37°) because coverage continuity > cost optimization. If rounding down still satisfies... ≤ If it is safe; if it is rounded up... > Then, strict verification of coverage is required.

[0049] Assuming design parameters: support angle =115°; Transducer beamwidth =38°; Number of transducers N=4 Step 1: Computational Theory =115 / (4 1) ≈38.333° Step 2: Rounding up - Select option 1: θ = 39° Gaps in the coverage may occur.

[0050] Option 2 (round down): =38°≤ The beam is exactly continuous. Choose to round down. =38°, and verify whether the piezoelectric element can cover the tolerance (the effect of 0.333° is negligible).

[0051] Alternative plan: If not divisible, adjust To the nearest integer (e.g., 115°→120°), or add one transducer (N+1). and When approaching the critical value, coverage continuity can also be verified through acoustic simulation (such as COMSOL). Alternatively, the operating frequency can be appropriately reduced to broaden the coverage. (because ∝1 / frequency).

[0052] The above description is only a part of the embodiments of this utility model, and does not limit the scope of protection of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this utility model.

Claims

1. An acoustic repelling device, characterized in that, The device includes: a power supply, a dry-end module electrically connected to the power supply, and a wet-end module typically connected to the dry-end module. The dry-end module includes a transformer, a power amplifier, an industrial control computer, and a digital acquisition card; The wet-end module includes an acoustic driving subsystem and an environmental sensor system; The transformer is used to convert the mains power input to the safe voltage required by the wet-end module; the industrial control computer is electrically connected to the power amplifier and the digital acquisition card respectively; the digital acquisition card is electrically connected to the environmental sensing subsystem and the acoustic driving subsystem. The acoustic driving subsystem includes at least one transducer array, which includes a plurality of transducers arranged in a fan shape around a center, and at least one central piezoelectric plate is provided between adjacent transducers. The environmental sensing subunit includes at least a salinity meter and an optical scattering turbidity sensor.

2. The acoustic repelling device as described in claim 1, characterized in that, The transducer array includes an arc-shaped support and a plurality of transducers; The outer side of the arc-shaped bracket has a C-shaped groove; each transducer has a threaded connection end and a rubber slider that fits into the groove at the tail end; and when the rubber slider is embedded in the groove, the tightness between the transducer and the bracket is adjusted by a nut that engages with the thread.

3. The acoustic repelling device as described in claim 2, characterized in that, The included angle between adjacent transducers satisfies the following formula: In the formula, It is the angle between adjacent transducers with the intersection of their radiation axes as the center, and ; This indicates the included angle rounded down. The physical angle of the arc-shaped support; The number of transducers; the angle between the piezoelectric element and the adjacent transducer. for / 2.

4. The acoustic repelling device as described in claim 2, characterized in that, The surface of the groove is provided with angle markings.

5. The acoustic repelling device as described in claim 2, characterized in that, The included angle between adjacent transducers with the intersection of their radiation axes as the center ranges from 30° to 45°; the number of transducers is 3 to 6.

6. An acoustic repelling device as described in any one of claims 1-5, characterized in that, The transducer includes a transducer body and a housing disposed on the outside of the body; The shell is made of alloy material and has an organic silicon coating on its surface.

7. The acoustic repelling device as described in claim 1, characterized in that, The dry-end module and the wet-end module are connected by an umbilical cable.

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