Low-frequency deep sea inlaid ring transducer structure

Abstract

The utility model provides a low frequency deep sea mosaic ring transducer structure, including mosaic ring subassembly, upper waveguide tube, lower waveguide tube and rigid spokes, said mosaic ring subassembly, upper waveguide tube, lower waveguide tube all are hollow annular structure, said upper waveguide tube and lower waveguide tube are respectively provided at the upper end and lower end of mosaic ring subassembly, the rigid spokes are a plurality of, and the rigid spokes are a hollow annular structure. The rigid spokes are arranged in the circumferential direction, each rigid spoke stretches across the splicing ring assembly, the two ends of each rigid spoke are connected to the upper waveguide tube and the lower waveguide tube respectively, and the upper waveguide tube and the lower waveguide tube are tensioned through the rigid spokes to clamp the splicing ring assembly. According to the structure, the power of the transducer is improved, the dependence on the size of the piezoelectric splicing ring is reduced, the weight of the transducer is reduced, the low-frequency and broadband performance of the transducer is improved, and the use convenience and expansibility are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of underwater acoustic transducer, especially to a low-frequency deep-sea mosaic ring transducer structure. BACKGROUND

[0002] The underwater acoustic transducer is a sensor for converting acoustic signals and electric signals in water, and the development of modern underwater acoustic technology requires the underwater acoustic transducer to meet the characteristics of low frequency, wide band, large power and deep water operation. The overflow type piezoelectric mosaic ring transducer is a structure that can meet the above requirements, and it has small size, small mass, large power and stable and reliable operation. It is a transducer that cannot be separated from underwater detection, identification, communication, ocean environment monitoring and ocean resource development.

[0003] The basic structure of this type of transducer is composed of a single or multiple piezoelectric mosaic rings. When working underwater, the inside is filled with water, forming a cylindrical liquid cavity with a diameter equal to the inner diameter of the piezoelectric mosaic ring and a total height equal to the height of the single or multiple piezoelectric mosaic rings. Because different sizes of liquid cavities correspond to specific resonant frequency liquid cavity vibration modes, the transducer has ideal electro-acoustic output characteristics at the liquid cavity modal frequency. Since the resonant frequency of the liquid cavity is inversely proportional to the size, in order to obtain a lower operating frequency, a large enough liquid cavity volume is required. How to obtain a liquid cavity of a specific size depends on the size and number of piezoelectric mosaic rings. When the size is very large, using a large number of piezoelectric ceramics to make multiple piezoelectric mosaic rings will result in a sharp increase in cost and an increase in overall weight. A waveguide made of lightweight metal (titanium alloy or aluminum alloy) material replaces the piezoelectric mosaic ring, and a single or multiple piezoelectric mosaic rings are combined to form a liquid cavity of a specific size. This can achieve a low-frequency large-size liquid cavity, reduce weight, and reduce production cost, improve structural strength and mechanical assembly convenience.

[0004] The overflow type piezoelectric mosaic ring transducer that can be realized by the current conventional process has a diameter of less than 1 meter, and it is difficult to achieve a resonant frequency below 300 Hz, and the weight exceeds 1 ton. Therefore, it is necessary to improve the existing transducer. The transducer made by combining a metal waveguide with a piezoelectric mosaic ring can reduce the weight by more than half while maintaining the same performance, reduce the cost to less than 50% of the original cost, and shorten the production cycle by more than 50%. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to improve the performance of the existing low-frequency overflow type piezoelectric mosaic ring transducer product to achieve lower operating frequency, wider operating bandwidth and overcome the problem of large size and weight caused by the use of multiple mosaic ring transducers. The utility model provides a low-frequency deep-sea mosaic ring transducer structure.

[0006] The technical scheme adopted by the utility model to solve its technical problems is: a low-frequency deep-sea mosaic ring transducer structure, comprising a mosaic ring assembly, an upper waveguide, a lower waveguide and a rigid spoke, the mosaic ring assembly, the upper waveguide and the lower waveguide are all hollow annular structures, the upper waveguide and the lower waveguide are respectively arranged at the upper and lower ends of the mosaic ring assembly, the rigid spoke is multiple, is arranged in the circumferential direction, each rigid spoke spans the mosaic ring assembly and is respectively connected at the upper end of the upper waveguide and the lower end of the lower waveguide, and the upper waveguide and the lower waveguide are pulled tight by the rigid spoke to clamp the mosaic ring assembly.

[0007] Further, the mosaic ring assembly comprises a water-tight sound-transmitting layer, a piezoelectric mosaic ring and glass steel, wherein the piezoelectric mosaic ring comprises a plurality of trapezoidal ceramic strips, the trapezoidal ceramic strips are arranged in the circumferential direction, the glass steel is coated on the outer side of the piezoelectric mosaic ring, that is, the trapezoidal ceramic strips are arranged on the inner wall of the glass steel in the circumferential direction, copper electrodes are arranged between adjacent trapezoidal ceramic strips, and the positions of adjacent copper electrodes are alternately arranged upward and downward, the copper electrodes comprise positive electrodes and negative electrodes, the positive electrodes and the negative electrodes are respectively arranged on the upper layer and the lower layer by being alternately arranged upward and downward, the water-tight sound-transmitting layer is internally provided with an annular cavity, and the piezoelectric mosaic ring and the glass steel are arranged in the annular cavity of the water-tight sound-transmitting layer, so that the piezoelectric mosaic ring is not in direct contact with the waveguide, and the water-tight sound-transmitting layer is in direct contact with the waveguide. The water-tight sound-transmitting layer is formed in a pouring mode, the connector is one, and is integrated with the water-tight sound-transmitting layer.

[0008] Further preferably, the piezoelectric mosaic ring has a diameter of 20mm-1500mm, a wall thickness of 2mm-50mm and a trapezoidal ceramic strip height of 10mm-300mm; and a single piezoelectric mosaic ring is composed of 10-1000 trapezoidal ceramic strips.

[0009] Further, the inner wall of the water-tight sound-transmitting layer is provided with a connector mounting portion, the connector is integrally connected to the connector mounting portion, and the copper electrodes are electrically connected to the connector.

[0010] Further, the combination surface of the mosaic ring assembly and the upper waveguide is provided with an upper limiting structure, the upper limiting structure comprises an upper limiting strip arranged on the upper end surface of the water-tight sound-transmitting layer and an upper limiting groove arranged on the lower end surface of the upper waveguide, the shapes of the upper limiting strip and the upper limiting groove are complementary, and the upper limiting strip is embedded in the upper limiting groove during assembly; the combination surface of the mosaic ring assembly and the lower waveguide is provided with a lower limiting structure, the lower limiting structure comprises a lower limiting strip arranged on the lower end surface of the water-tight sound-transmitting layer and a lower limiting groove arranged on the upper end surface of the lower waveguide, the shapes of the lower limiting strip and the lower limiting groove are complementary, and the lower limiting strip is embedded in the lower limiting groove during assembly.

[0011] Further, in order to facilitate the connection of the rigid spokes, the outer wall of the upper waveguide is provided with a plurality of upper connecting positions, the outer wall of the lower waveguide is provided with a plurality of lower connecting positions, the upper connecting position and the lower connecting position correspond one by one, the upper end of the rigid spoke is connected to the upper connecting position through a fastener, and the lower end is connected to the lower connecting position through a fastener.

[0012] The low-frequency deep-sea mosaic ring transducer structure has the advantages that the power of the transducer is improved by using the special size trapezoidal ceramic strip, the main structure of the piezoelectric mosaic ring is clamped by the two waveguides through the rigid spokes, the required low-frequency liquid cavity working mode is obtained without increasing the height of the piezoelectric ceramic mosaic ring, the size dependence of the piezoelectric mosaic ring is reduced, the weight of the transducer is reduced, the low-frequency and wideband performance of the transducer is improved, the interface structure of the connector and the transducer main body is integrated, the convenience and expansibility of use are improved, the overall structure is simple, the production and manufacturing difficulty is almost not increased compared with the traditional mosaic ring transducer, and the low-frequency deep-sea mosaic ring transducer structure is suitable for large-scale industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0013] The low-frequency deep-sea mosaic ring transducer structure will be further described below in combination with the drawings and examples.

[0014] Figure 1 is a structural schematic view of the low-frequency deep-sea mosaic ring transducer structure.

[0015] Figure 2 is Figure 1 axial cross-sectional structural schematic view of

[0016] Figure 3 is a three-dimensional structural schematic view of the mosaic ring assembly.

[0017] Figure 4 is a radial cross-sectional structural schematic view of the mosaic ring assembly.

[0018] Figure 5 is Figure 4 enlarged structural schematic view of A in

[0019] Figure 6 is an internal structural schematic view of the mosaic ring assembly.

[0020] Figure 7 is a structural schematic view of the water-tight sound-permeable layer.

[0021] In the figure: 1, connector, 2, upper waveguide, 2.1, upper connecting position, 2.2, upper limiting groove, 3, rigid spoke, 4, water-tight sound transmission layer, 4.1, annular cavity, 4.2, upper limiting strip, 4.3, lower limiting strip, 4.4, connector mounting portion, 5, trapezoidal ceramic strip, 6, copper electrode, 7, glass steel, 8, lower waveguide, 8.1, lower connecting position, 8.2, lower limiting groove. DETAILED DESCRIPTION

[0022] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] As Figures 1-7As shown in the utility model discloses a kind of low-frequency deep-sea mosaic ring transducer structures, including mosaic ring assembly, upper waveguide 2, lower waveguide 8 and rigid spoke 3, the mosaic ring assembly, upper waveguide 2, lower waveguide 8 are all hollow annular structure, the upper waveguide 2, lower waveguide 8 are respectively arranged in the upper and lower ends of mosaic ring assembly, the rigid spoke 3 is multiple, it is arranged along circumference, and each the rigid spoke 3 straddles mosaic ring assembly and two ends are respectively connected on upper waveguide 2 and lower waveguide 8, and mosaic ring assembly is clamped by rigid spoke 3 tensioning upper waveguide 2 and lower waveguide 8.For the connection of rigid spoke 3, the outer wall of upper waveguide 2 is equipped with several upper connection sites 2.1, the outer wall of lower waveguide 8 is equipped with several lower connection sites 8.1, the upper connection site 2.1 and lower connection site 8.1 are one-to-one correspondence, the upper end of rigid spoke 3 is connected on upper connection site 2.1 by fastener, and the lower end is connected on lower connection site 8.1 by fastener, and fastener includes but is not limited to screw, bolt and the like.

[0026] As Figures 3-6 Shown, the mosaic ring assembly includes watertight sound-transmitting layer 4, piezoelectric mosaic ring and glass steel 7, wherein the piezoelectric mosaic ring includes several trapezoidal ceramic strips 5, the trapezoidal ceramic strip 5 is arranged along circumference, the glass steel 7 is covered on the outside of piezoelectric mosaic ring, i.e. trapezoidal ceramic strip 5 is arranged on the inner wall of glass steel 7 along circumference, copper electrode 6 is arranged between adjacent trapezoidal ceramic strips 5, and the position of adjacent copper electrode 6 is alternately arranged up and down, copper electrode 6 includes positive and negative, by alternately arranging up and down, make positive and negative respectively in the upper and lower two layers, the watertight sound-transmitting layer 4 is equipped with annular cavity 4.1 in the inside, the piezoelectric mosaic ring and glass steel 7 are all arranged in annular cavity 4.1 of watertight sound-transmitting layer 4, make piezoelectric mosaic ring not directly contact with waveguide, and watertight sound-transmitting layer 4 directly contacts with waveguide.The watertight sound-transmitting layer 4 is formed by the mode of pouring, and the connector 1 is one, and is integrated with watertight sound-transmitting layer 4.As preferred, the diameter of piezoelectric mosaic ring is between 20mm~1500mm, the wall thickness is between 2mm~50mm, and the height of trapezoidal ceramic strip 5 is between 10mm~300mm;Single piezoelectric mosaic ring is combined by 10~1000 trapezoidal ceramic strips 5.

[0027] Specific size is as follows: 2~5k piezoelectric mosaic ring transducer, outer diameter 270mm, inner diameter 240mm, height 120mm, ceramic strip number 120;3-6k piezoelectric mosaic ring transducer, outer diameter 180mm, inner diameter 160mm, height 80mm, ceramic strip number 90.

[0028] As Figure 2 , Figure 7As shown, the inner wall of the watertight acoustic layer 4 is provided with a connector mounting part 4.4, the connector 1 is integrally connected to the connector mounting part 4.4, and the copper electrode 6 is electrically connected to the connector 1. An upper limit structure is provided on the mating surface of the inlay ring assembly and the upper waveguide 2. The upper limit structure includes an upper limit bar 4.2 provided on the upper end face of the watertight acoustic layer 4 and an upper limit groove 2.2 provided on the lower end face of the upper waveguide 2. The upper limit bar 4.2 and the upper limit groove 2.2 have complementary shapes. During assembly, the upper limit bar 4.2 is embedded in the upper limit groove 2.2. A lower limit structure is provided on the mating surface of the inlay ring assembly and the lower waveguide 8. The lower limit structure includes a lower limit bar 4.3 provided on the lower end face of the watertight acoustic layer 4 and a lower limit groove 8.2 provided on the upper end face of the lower waveguide 8. The lower limit bar 4.3 and the lower limit groove 8.2 have complementary shapes. During assembly, the lower limit bar 4.3 is embedded in the lower limit groove 8.2. Figure 7 As shown, the inner wall of the watertight sound-permeable layer 4 is provided with a connector mounting part 4.4, the connector 1 is integrally connected to the connector mounting part 4.4, and the copper electrode 6 is electrically connected to the connector 1.

[0029] Production process:

[0030] First, the relative positions of the piezoelectric inlay ring and connector 1 are fixed by the mold. Then, the watertight sound-permeable layer 4 is poured into the mold. The piezoelectric inlay ring is wrapped inside the watertight sound-permeable layer 4. The material of the watertight sound-permeable layer 4 can be polyurethane, but is not limited to polyurethane. Finally, the upper waveguide 2 and the lower waveguide 8 are fixed to both sides of the watertight sound-permeable layer 4 by rigid spokes 3, which clamp the watertight sound-permeable layer 4.

[0031] The piezoelectric inlay ring consists of a trapezoidal ceramic strip 5, a copper electrode 6, and a fiberglass 7. The dimensions of the trapezoidal ceramic strip 5 are calculated. The trapezoidal ceramic strip 5 and the copper electrode 6 are arranged in a circular ring with intervals. The outer layer of the ring is wrapped with fiberglass 7, and the fiberglass 7 applies stress to the ring.

[0032] This invention utilizes precisely calculated dimensions to customize piezoelectric ceramic transducers into piezoelectric inlay rings. Two waveguides are added to both sides of the transducer's opening direction, clamped by outer rigid spokes 3, to achieve directional modification of the liquid cavity morphology and obtain the desired liquid cavity vibration modes. By changing the shape of the metal waveguides, the acoustic performance of the transducer, including axial response and directivity, can be effectively improved without altering the piezoelectric ceramic inlay rings. Furthermore, the structure is simple and significantly lighter than using multiple inlay ring transducer arrays.

[0033] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the scope of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A low-frequency deep-sea inlaid ring transducer structure, characterized in that: The device includes a mosaic ring assembly, an upper waveguide, a lower waveguide, and rigid spokes. The mosaic ring assembly, the upper waveguide, and the lower waveguide are all hollow annular structures. The upper waveguide and the lower waveguide are respectively located at the upper and lower ends of the mosaic ring assembly. There are multiple rigid spokes arranged circumferentially. Each rigid spoke spans the mosaic ring assembly and its two ends are respectively connected to the upper waveguide and the lower waveguide. The mosaic ring assembly is clamped by tightening the upper waveguide and the lower waveguide through the rigid spokes.

2. The low-frequency deep-sea inlaid ring transducer structure as described in claim 1, characterized in that: The inlay ring assembly includes a watertight acoustic layer, a piezoelectric inlay ring, and fiberglass. The piezoelectric inlay ring includes several trapezoidal ceramic strips arranged circumferentially. The fiberglass covers the outside of the piezoelectric inlay ring. Copper electrodes are provided between adjacent trapezoidal ceramic strips, and the positions of adjacent copper electrodes are alternately arranged vertically. The watertight acoustic layer has an annular cavity inside, and both the piezoelectric inlay ring and the fiberglass are disposed within the annular cavity of the watertight acoustic layer.

3. The low-frequency deep-sea inlaid ring transducer structure as described in claim 2, characterized in that: The diameter of the piezoelectric inlay ring is between 20mm and 1500mm, the wall thickness is between 2mm and 50mm, and the height of the trapezoidal ceramic strip is between 10mm and 300mm; a single piezoelectric inlay ring is composed of 10 to 1000 trapezoidal ceramic strips.

4. The low-frequency deep-sea inlaid ring transducer structure as described in claim 2, characterized in that: The inner wall of the watertight sound-permeable layer is provided with a connector mounting part, the connector is integrally connected to the connector mounting part, and the copper electrode is electrically connected to the connector.

5. The low-frequency deep-sea inlaid ring transducer structure as described in claim 2, characterized in that: The mating surface between the inlay ring assembly and the upper waveguide is provided with an upper limit positioning structure. The upper limit positioning structure includes an upper limit positioning strip disposed on the upper end face of the watertight acoustic layer and an upper limit positioning groove disposed on the lower end face of the upper waveguide. The upper limit positioning strip and the upper limit positioning groove have complementary shapes. During assembly, the upper limit positioning strip is embedded in the upper limit positioning groove. The mating surface between the inlay ring assembly and the lower waveguide is provided with a lower limit positioning structure. The lower limit positioning structure includes a lower limit positioning strip disposed on the lower end face of the watertight acoustic layer and a lower limit positioning groove disposed on the upper end face of the lower waveguide. The lower limit positioning strip and the lower limit positioning groove have complementary shapes. During assembly, the lower limit positioning strip is embedded in the lower limit positioning groove.

6. The low-frequency deep-sea inlaid ring transducer structure as described in claim 1, characterized in that: The outer wall of the upper waveguide is provided with a number of upper connection positions, and the outer wall of the lower waveguide is provided with a number of lower connection positions. The upper connection positions and the lower connection positions correspond one-to-one. The upper end of the rigid spoke is connected to the upper connection position by a fastener, and the lower end is connected to the lower connection position by a fastener.

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