A low frequency bending disc transducer with cable out of radiation surface

Abstract

The application discloses a kind of radiation surface cable-out low-frequency bending disc transducer hanging sources, for the transducer of up-down symmetry structure, the hanging source includes up-down symmetry radiation panel, piezoelectric ceramic disc is bonded to the outer surface of radiation panel, radiation panel center is opened, and cable-out piece is arranged in hole as transducer cable-out fixed interface, the cable-out piece is connected and sealed by screw extrusion with rubber pad by radiation panel.The cable-out piece end of the center of the bending disc transducer structure adjustment can be connected cable, the transducer can maximize radial space, reduce the size loss caused by cable-out on circumferential tangential, reduce resonance frequency, while transducer up-down cable-out is easy to connect each other in dense array, without outside cable, its structure adjustment is less, and the realization method is simple and easy to operate, can save the original advantage performance of bending disc transducer.

Description

Technical Field

[0001] This invention belongs to the field of transducer technology, and particularly relates to a suspended sound source for a low-frequency bending disc transducer with a radiating surface cable output. Background Technology

[0002] Currently, in large-size dipping acoustic sources for aviation, curved disk transducers are often stacked in close arrays. When the lower limit of the operating frequency is low, the maximum outer diameter is limited by the outlet size, making it impossible to directly increase the transducer diameter to achieve this. Conversely, reducing the frequency by increasing the array element spacing or decreasing the thickness of the acoustic radiation panel leads to insufficient maximum source level or pressure resistance. Furthermore, the transducers are connected circumferentially by at least three load-bearing ropes and interconnected by cables, increasing the risk of entanglement. Therefore, there is room for optimization in the performance and structure of curved disk transducer dipping acoustic sources.

[0003] The diameter of a suspended sound source using a curved disk transducer is often strictly limited by the size of the sound source outlet, while the requirements for vertical space are relatively low. For curved disk transducers, assuming a constant maximum outer diameter, common methods to ensure a low transducer frequency focus are often focused on the transducer itself, primarily reducing the thickness of the acoustic radiation plate and decreasing the spacing between transducer elements. However, each method inevitably leads to deviations in other performance characteristics. It is indeed possible that using the above methods may not meet other performance indicators, or that the target frequency cannot be reached even after using these methods.

[0004] Currently, there is no information in patents or literature regarding methods for using curved disc transducers to avoid entanglement between load-bearing ropes and cables, and to reduce the operating frequency of the transducer.

[0005] The current cable exit method for curved disc transducers is influenced by conventional thinking, conventionally choosing a tangential cable exit method with an outer circular ring. No matter how much the size is simplified with this approach, it is still impossible to avoid the waste of radial dimensions. At the same time, the cable exit position is adjacent to the load-bearing rope, making it difficult to avoid the problem of entanglement. In addition, the cable exit method with the sound radiation surface is intuitively perceived to affect vibration, further leading to the widespread use of tangential cable exit. Summary of the Invention

[0006] To address the shortcomings and deficiencies of the existing technology, this invention provides a method for suspending sound sources that addresses the limitations of radial dimensions and ample vertical space. The cable exit direction is led vertically along the transducer center and watertight. This minimizes the waste of space due to the cable exit without altering the transducer's structure and performance. Furthermore, this method facilitates the series connection of closely spaced transducers, saving cable usage. Additionally, the opening in the middle of the circular plate due to the cable exit further weakens the stiffness of the transducer's curved disk acoustic radiation surface, contributing to a lower resonant frequency. This allows for continued frequency reduction without conflicting with existing frequency reduction methods, while also avoiding the risk of entanglement between the outer circumference cable and the load-bearing rope. This method utilizes a low-frequency curved disk transducer with a cable exit on the radiation surface for suspending sound sources.

[0007] The technical solution of the present invention is as follows: a low-frequency bending disc transducer suspended sound source with a radiating surface cable output, used for transducers with an upper and lower symmetrical structure. The suspended sound source includes a symmetrical radiating panel, a piezoelectric ceramic disc bonded to the outer surface of the radiating panel, a hole in the center of the radiating panel, and a cable output component provided in the hole as a fixed interface for the transducer cable output. The cable output component and the radiating panel are connected and sealed by a rubber pad and screws.

[0008] Preferably, the cable outlet is a small-diameter cylindrical cable outlet, and the rubber pad is pressed onto the cable outlet by an outer pressure ring and an outer pressure ring fixing screw, and the rubber pad is pressed onto the corresponding radiating panel by an inner pressure ring and an inner pressure ring fixing screw.

[0009] Preferably, the end of the cable outlet is watertightly connected to the cable connector, and the cable outlet has a preset channel inside, which can connect the wires led out from the end cable connector into the transducer cavity space and complete the connection with the positive and negative electrodes of the piezoelectric ceramic; if it is arranged in a tightly coiled array, the lower interface of the upper transducer cable outlet can be connected to the upper interface cable of the adjacent lower transducer cable outlet to complete the array wiring.

[0010] Preferably, the radiating panel, cable outlet, outer pressure ring, outer pressure ring fixing screw, inner pressure ring fixing screw, and inner pressure ring are all made of 316 stainless steel, the piezoelectric ceramic disc is made of P4 material, the piezoelectric ceramic is highly polarized, and after being connected in parallel, the positive and negative electrodes are introduced into the inner cavity through the small hole in the radiating panel using a wire.

[0011] Preferably, the piezoelectric ceramic disc is one piece or a combination of multiple pieces.

[0012] Preferably, the radiating panel and the cable outlet are connected in a watertight manner by a rubber pad and are flexible.

[0013] Preferably, the cable outlet component has a curved circumference, which allows the rubber pad to adhere tightly to the cable outlet component when the external hydrostatic pressure is high, thus protecting it, preventing large deformation, and improving its service life.

[0014] Preferably, the load-bearing ropes in the dense array of suspended sound sources are evenly distributed at four points around the circumference near the outer edge, which will not be adjacent to the cable exiting the center of the transducer in space, thus avoiding the risk of entanglement.

[0015] The present invention has the following effects:

[0016] After adjusting the structure of the curved disk transducer, the cable outlet at the center of the circle can be connected to a cable. The transducer can make maximum use of radial space, reduce the size loss caused by the circumferential tangential cable outlet, and lower the resonant frequency. At the same time, the upper and lower cables of the transducer are easy to connect in a close array without the need for external cable routing. The structure adjustment is minimal, the implementation method is simple and easy, and the original advantages of the curved disk transducer can be preserved. Attached Figure Description

[0017] Figure 1 This is a front view of an embodiment of the curved disk transducer array element of this patent.

[0018] Figure 2 This is a cross-sectional view of a front view of an embodiment of the curved disk transducer array element of this patent.

[0019] Figure 3 for Figure 2 Enlarged view of the center section of the sectional view;

[0020] Figure 4 This is a schematic diagram of an embodiment of a curved disk transducer with a suspended sound source. Detailed Implementation

[0021] The present invention will be further described in detail below through specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0022] Example 1

[0023] like Figure 1-3 As shown, a low-frequency bending disc transducer with a radiating surface and cable output is used to suspend a sound source. It includes 18 symmetrical radiating panels 1, piezoelectric ceramic discs 2 bonded to the outer surface of the radiating surface, and a cable output component 3 in the center. In addition, there are an outer pressure ring 4, a rubber pad 5, an outer pressure ring fixing screw 6, an inner pressure ring fixing screw 7, and an inner pressure ring 8.

[0024] Radiation panel 1, cable outlet 3, outer pressure ring 4, outer pressure ring fixing screw 6, inner pressure ring fixing screw 7 and inner pressure ring 8 are all made of 316 stainless steel. The piezoelectric ceramic disc 2 is made of P4 material. The piezoelectric ceramic is highly polarized. After parallel connection, the positive and negative electrodes are introduced into the inner cavity through the small hole opened in the radiation panel 1 using wires. This small hole is not shown in the figure.

[0025] The upper end of the cable outlet 3 can be watertightly connected to the cable connector. The cable has 2 cores and can be subjected to a voltage of not less than 600V. The two wires of the cable turn into the transducer cavity from inside the cable outlet and are connected to the positive and negative poles of the piezoelectric ceramic, respectively.

[0026] The rubber pad 5 forms watertight seals at both ends, preventing water from the outside of the transducer from entering the inner cavity. One end is the outer pressure ring 4, which is pressed into the cable outlet 3 to form a watertight seal via the outer pressure ring fixing screw 6. The other end is the inner pressure ring 8, which is pressed into the radiation panel 1 to form a watertight seal via the inner pressure ring fixing screw 7.

[0027] The cable outlet has a curved circumference, which allows the rubber pad to adhere tightly to the cable outlet when the external hydrostatic pressure is high, protecting it from large deformation and extending its service life.

[0028] During operation, if the hydrostatic pressure is too high, the sound radiation plate will deform inward, and the gap between the inner pressure ring 8 and the cable outlet 3 will disappear, thus providing protection.

[0029] Example 2

[0030] like Figure 4 As shown, the load-bearing rope 9 in the dense array of suspended sound sources has four points evenly distributed around the circumference near the outer edge. Spatially, it will not be adjacent to the cable exiting the center of the transducer, thus avoiding the risk of entanglement.

[0031] It is important to note that the transducers require a special packaging structure when stored, with the left and right sides staggered and supported to prevent the center cable outlet from being squeezed and damaged by close contact.

[0032] The present invention has an opening in the center of the radiating panel, which can reduce the operating frequency and reserve space for the installation of structural components such as cables.

[0033] This invention features a watertight connection between the outlet cable and the opening at the center of the radiating panel using a rubber gasket. This rubber gasket has two layers of watertight treatment, unlike an O-ring, providing both flexibility and decoupling to prevent the cable from affecting the transducer's vibration operation. Conventionally, the outlet cable is best installed away from the sound radiation surface, ideally avoiding the center of the sound radiation panel. This invention, however, precisely selects the center location, where the amplitude of vibration is greatest, for the cable connection.

[0034] If the hydrostatic pressure is too high and the radiant panel deforms inward, the gap between the inner pressure ring and the cable outlet will disappear and the two will stick together, thus providing a limiting and protective function.

[0035] This invention improves the radial space utilization rate with a fixed outer diameter by opening a hole in the center of the radiating panel and flexibly extending the cable. It avoids the radial space waste caused by the tangential cable extending from the outermost part of the circumference, and facilitates the parallel connection of the upper and lower positive and negative poles of the transducer array. At the same time, the transducer structure remains almost unchanged. In addition, the center position of the radiating panel is changed from a conventional uniform circular plate to a structure with a central opening, which is beneficial to reducing the resonant frequency of the transducer and can be used in conjunction with other frequency reduction methods.

[0036] The above description of specific embodiments is only for the purpose of helping to understand and apply the present invention, and is not intended to limit the scope of the present invention. It should be noted that those skilled in the art can make various modifications to the embodiments without departing from the principles of the present invention. Therefore, the present invention is not limited to the embodiments described in this application, and modifications and improvements made to the present invention by those skilled in the art based on the disclosure of the present invention should be within the scope of protection claimed by the present invention.

Claims

1. A radiating surface cable-exit low-frequency bending disc transducer suspended sound source, used in transducers with an upper and lower symmetrical structure, characterized in that: The suspended sound source includes symmetrical upper and lower radiating panels. Piezoelectric ceramic discs are bonded to the outer surface of the radiating panels. The radiating panels have a central opening with a cable outlet component inside the opening, which serves as a fixed interface for the transducer cable outlet. The cable outlet component is connected to the radiating panels by a rubber pad and screws and is sealed. The cable outlet component is a small-diameter cylindrical cable outlet component. The rubber pad is pressed onto the cable outlet component by an outer pressure ring and an outer pressure ring fixing screw. The rubber pad is pressed onto the corresponding radiating panel by an inner pressure ring and an inner pressure ring fixing screw. The end of the cable outlet is watertightly connected to the cable connector. The cable outlet has a pre-set channel inside, which can connect the wires led out from the end cable connector into the transducer cavity space and complete the connection with the positive and negative electrodes of the piezoelectric ceramic. If the upper and lower curved coils are arranged in a dense array, the lower interface of the upper transducer cable outlet can be connected to the upper interface cable of the adjacent lower transducer cable outlet to complete the array wiring. The cable outlet component has a curved circumference, which allows the rubber pad to adhere tightly to the cable outlet component when the external hydrostatic pressure is high, thus protecting it, preventing large deformation, and improving its service life.

2. The radiating surface cable output low-frequency bending disc transducer suspended sound source according to claim 1, characterized in that: The radiating panel, cable outlet, outer pressure ring, outer pressure ring fixing screw, inner pressure ring fixing screw, and inner pressure ring are all made of 316 stainless steel. The piezoelectric ceramic disc is made of P4 material. The piezoelectric ceramic is highly polarized. After being connected in parallel, the positive and negative electrodes are introduced into the inner cavity through the small hole in the radiating panel using a wire.

3. The radiating surface cable output low-frequency bending disc transducer suspended sound source according to claim 1, characterized in that: The piezoelectric ceramic disc is one piece or a combination of multiple discs.

4. The radiating surface cable output low-frequency bending disc transducer suspended sound source according to claim 1, characterized in that: The radiating panel and the cable outlet are connected in a watertight manner by a rubber pad and are flexible.

5. A suspended sound source for a low-frequency bending disc transducer with a radiating surface cable according to claim 1, characterized in that: The load-bearing ropes in the dense array of suspended sound sources are evenly distributed at four points around the circumference near the outer edge, which avoids the risk of entanglement by ensuring that they are not adjacent to the cable exiting the center of the transducer.

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