A full-space scanning circular ring transducer structure

Abstract

The present invention provides a full-space scanning type annular transducer structure, which mainly includes a vertical rotation structure, a horizontal rotation structure and an annular transducer. Sound radiation is performed through the annular transducer, and full-space scanning is performed through the vertical rotation structure and the horizontal rotation structure; the horizontal rotation structure is installed on a support adapter plate, and is used to drive the support adapter plate to rotate horizontally; the support adapter plate is fixedly connected to two vertical support plates, and a support frame is arranged between the two vertical support plates, and the support frame is fixedly connected to the annular transducer, and the vertical rotation structure is fixed on the vertical support plate and drives the support frame to rotate, thereby driving the annular transducer to rotate. The beneficial effects of the present invention are: utilizing the low-frequency directivity characteristics of the annular transducer, and adopting a full-space controllable scanning structure, to achieve: high sound source level operation of the transducer under small size and light weight; controllable directional radiation mode to reduce the reverberation effect; directional sound radiation to reduce the difficulty of receiving and positioning.

Description

Technical Field

[0001] The invention relates to the field of transducers, and mainly relates to a full-space scanning type circular ring transducer structure. Background Art

[0002] Ring transducer is one of the most common transducers in underwater acoustic transducers. In the case of high-power transmission, it is usually made of multiple ceramic pieces spliced ​​together, with a structure such as Figure 1 As shown. The ring transducer has the advantages of mature technology, large power capacity, strong resistance to hydrostatic pressure, and radial non-directionality. It is widely used in many fields such as underwater acoustic detection and communication.

[0003] Ring transducers can be divided into two directions: axial and radial. The radial response has a small fluctuation and can achieve non-directional radiation; the axial sound energy is the same phase superposition of the axial, the response is higher, but the directivity fluctuates greatly, and it is difficult to achieve omnidirectional work. In actual work, in order to obtain better horizontal directivity, ring transducers usually use radial radiation. This working mode obtains horizontal non-directional performance but also brings the following problems:

[0004] (1) A large amount of acoustic energy is wasted in the vertical direction. In order to obtain a higher sound source level, the transducer needs to be arranged in an array, resulting in a large waste;

[0005] (2) The vertical sound energy radiates toward the sea surface and the seabed, and the huge reverberation seriously affects the detection performance of the sonar system;

[0006] (3) The horizontal non-directional radiation mode makes it difficult to locate the target. In actual work, a longer towed line receiving array is often required. In order to distinguish the left and right sides, a double towed line receiving array is also required.

[0007] The axial sound field of the ring transducer is formed by the in-phase superposition of radial vibrations. When the transducer height is small, the radial vibrations are superimposed in the axial direction, and the axial sound source level is much greater than the radial sound source level. For example, for a ring transducer with an operating frequency of 1.5kHz, the transducer diameter is about 700mm, the transducer height is about 200mm, and the axial sound source level at resonance is about 14dB higher than the radial level. From the symmetry, it can be seen that the plane perpendicular to the axial direction is non-directional; the plane perpendicular to the radial direction has large fluctuations in directivity, such as Figure 2 shown.

[0008] like Figure 3 As shown, in the directivity perpendicular to the radial direction, the 90-degree direction is the axial direction. It can be seen that the -3dB opening angle of the transducer is about 60 degrees; the directivity fluctuation perpendicular to the axial direction is less than 0.5dB, which is approximately non-directional radiation.

[0009] The radial response fluctuation of the ring transducer is small, and non-directional radiation can be achieved; the axial sound energy is the in-phase superposition of the axial direction, and the response is higher, but the directivity fluctuation is large, and it is difficult to achieve omnidirectional operation. In engineering applications, in order to obtain horizontal non-directional sound radiation, the mosaic ring transducer is usually arranged vertically in the height direction. This arrangement makes it impossible to utilize the larger axial sound source level. In order to obtain a higher sound source level, multiple transducers are usually stacked along the axial direction. In order to achieve a sound source level equivalent to the axial direction, a ring transducer of this size requires about 5 transducers to be closely arranged along the axial direction, so that the size and weight of the entire transmitting system, the scale of the power supply system, the size of the power supply cable and other parameters all need to be increased proportionally. Summary of the invention

[0010] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a full-space scanning circular ring transducer structure, which utilizes the directional characteristics of the sound radiation of a single circular ring transducer and combines it with mechanical scanning to achieve a full-space, high sound source level, directional sound radiation structure.

[0011] The purpose of the present invention is achieved through the following technical solutions. A full-space scanning annular transducer structure mainly includes a vertical rotation structure, a horizontal rotation structure and an annular transducer, which performs sound radiation through the annular transducer and performs full-space scanning through the vertical rotation structure and the horizontal rotation structure; the horizontal rotation structure is installed on a support adapter plate, which is used to drive the support adapter plate to rotate horizontally; the support adapter plate is fixedly connected to two vertical support plates, a support frame is provided between the two vertical support plates, a annular transducer is fixedly connected to the support frame, and the vertical rotation structure is fixed on the vertical support plate and drives the support frame to rotate, thereby driving the annular transducer to rotate.

[0012] The annular transducer is composed of a wedge-shaped ceramic strip, a watertight epoxy layer, a sealing cover plate, and an external metal ring. The wedge-shaped ceramic strip is inlaid into an annular structure, a sealing cover plate is provided on the side of the annular structure, and a watertight epoxy layer and an external metal ring are sequentially sleeved outside the annular structure. When working, the wedge-shaped ceramic strip vibrates radially, driving the watertight epoxy layer and the external metal ring to radiate sound.

[0013] The vertical rotation structure is composed of a transverse connecting rod, a transverse transfer rod, a vertical rotation motor and a side baffle. The vertical rotation motor is connected to the vertical support plate by screws; the vertical rotation motor is connected to the transverse transfer rod by pins, and the transverse transfer rod is connected to the vertical support plate by bearings and keeps free rotation; the transverse transfer rod is connected to the transverse connecting rod by screws to form a rectangular support frame, and the transverse connecting rod is connected to the sealing cover plate of the circular transducer; when working, the vertical rotation motor drives the support frame composed of the transverse transfer rod and the transverse connecting rod, thereby enabling the circular transducer to realize rotation scanning in the vertical direction.

[0014] The horizontal rotating structure is composed of a supporting base, a supporting bearing, a horizontal rotating motor, a sealing base, a sealing plate and a watertight bearing, wherein the horizontal rotating motor, the sealing base, the sealing plate and the watertight bearing constitute a watertight motor; the watertight motor is fixed to the supporting adapter plate through the screw holes on the sealing base; the supporting adapter plate is connected to the supporting base through the supporting bearing and maintains freedom of rotation in the horizontal direction; the watertight motor is connected to the supporting base through the motor shaft; the supporting adapter plate is connected to the vertical supporting plate in the vertical rotating structure through screws; when the watertight motor is working, it drives the entire supporting adapter plate to rotate horizontally.

[0015] The sealing base and the sealing plate form a sealing shell, and the interior of the sealing shell is filled with castor oil.

[0016] The beneficial effects of the present invention are as follows: the present invention utilizes the low-frequency directivity characteristics of the ring transducer and adopts a full-space controllable scanning structure to achieve: high sound source level operation of the transducer in a small size and light weight; controllable directional radiation mode to reduce the impact of reverberation; directional sound radiation to reduce the difficulty of receiving and positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a traditional inlaid ring transducer.

[0018] Figure 2 It is a schematic diagram of the axial and radial transmission voltage response curves of the inlaid ring transducer.

[0019] Figure 3 Schematic diagram of the directivity perpendicular to the radial direction and the directivity perpendicular to the axial direction at the resonance point.

[0020] Figure 4 It is a structural schematic diagram of the present invention.

[0021] Figure 5 Schematic diagram of the structure of the ring transducer.

[0022] Figure 6 for Figure 5 AA cross-section diagram of .

[0023] Figure 7 It is a schematic diagram of the main structure of the vertical rotating structure.

[0024] Figure 8 It is a schematic diagram of the vertical rotating structure when viewed from above.

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the vertical rotating structure.

[0026] Fig.10 It is a schematic diagram of the main structure of the horizontal rotating structure.

[0027] Fig.11 for Fig.10 AA cross-section diagram of .

[0028] Explanation of the accompanying drawings: vertical rotation structure 1, horizontal rotation structure 2, ring transducer 3, wedge-shaped ceramic strip 4, watertight epoxy layer 5, sealing cover plate 6, external metal ring 7, transverse connecting rod 8, transverse transfer rod 9, vertical support plate 10, vertical rotation motor 11, side baffle 12, support transfer plate 13, watertight bearing 14, horizontal rotation motor 15, support bearing 16, support base 17, sealing base 18, sealing plate 19. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings:

[0030] like Figure 4 As shown, a full-space scanning type annular transducer structure is composed of three parts: a vertical rotating structure 1, a horizontal rotating structure 2 and annular transducer 3. The system radiates sound through the annular transducer 3 and performs full-space scanning through the vertical rotating structure 1 and the horizontal rotating structure 2. The horizontal rotating structure 2 is installed on a support adapter plate 13, which is used to drive the support adapter plate 13 to rotate horizontally; the support adapter plate 13 is fixedly connected to two vertical support plates 10, and a support frame is arranged between the two vertical support plates 10, and the support frame is fixedly connected to the annular transducer 3, and the vertical rotating structure 1 is fixed on the vertical support plate 10 and drives the support frame to rotate, thereby driving the annular transducer 3 to rotate.

[0031] like Figure 5-Figure 6 As shown, the annular transducer 3 is composed of a wedge-shaped ceramic strip 4, a watertight epoxy layer 5, a sealing cover plate 6, and an external metal ring 7. The wedge-shaped ceramic strip 4 is inlaid into an annular structure, and a sealing cover plate 6 is provided on the side of the annular structure. The watertight epoxy layer 5 and the external metal ring 7 are sequentially sleeved outside the annular structure. When the transducer is working, the wedge-shaped ceramic strip 4 vibrates radially, driving the watertight epoxy layer 5 and the external metal ring 7 to radiate sound. The annular transducer is combined with the vertical rotating structure through the rectangular mounting hole on the sealing cover plate 6.

[0032] like Figure 7-Figure 9As shown, the vertical rotation structure 1 is composed of a transverse connecting rod 8, a transverse transfer rod 9, a vertical rotation motor 11 and a side baffle 12. The vertical rotation motor 11 is connected to the vertical support plate 10 by screws; the vertical rotation motor 11 is connected to the transverse transfer rod 9 by pins, and the transverse transfer rod 9 is connected to the vertical support plate 10 by a bearing and keeps free rotation; the transverse transfer rod 9 is connected to the transverse connecting rod 8 by screws to form a rectangular support frame, and the transverse connecting rod 8 is connected to the sealing cover plate 6 of the annular transducer; when the vertical rotation structure is working, the vertical rotation motor 11 drives the support frame composed of the transverse transfer rod 9 and the transverse connecting rod 8, thereby enabling the annular transducer 3 to realize rotation scanning in the vertical direction.

[0033] like Figure 10-11 As shown, the horizontal rotating structure 2 is composed of a supporting base 17, a supporting bearing 16, a horizontal rotating motor 15, a sealing base 18, a sealing plate 19 and a watertight bearing 14, wherein the horizontal rotating motor 15, the sealing base 18, the sealing plate 19 and the watertight bearing 14 form a watertight motor; the watertight motor is fixed to the supporting adapter plate 13 through the screw holes on the sealing base 18; the supporting adapter plate 13 is connected to the supporting base 17 through the supporting bearing 16, and keeps the horizontal direction free to rotate; the watertight motor is connected to the supporting base 17 through the motor shaft; the supporting adapter plate 13 is connected to the vertical supporting plate 10 in the vertical rotating structure through screws. When the horizontal rotating motor 15 is working, the supporting base 17 is fixed, and the motor drives the entire supporting adapter plate 13 to rotate horizontally. In order to ensure that the motor can work normally underwater, the sealing base 18 and the sealing plate 19 form a sealed shell, and the inside of the sealed shell is filled with castor oil.

[0034] After the present invention adopts the structural form of full-space mechanical scanning, the sound source level of the transducer is improved by about 14dB compared with the traditional method, thereby increasing the detection distance; the directivity opening angle is about 60°, which greatly reduces the influence of underwater acoustic reverberation and the reflection of the water surface and the seabed on the receiving array; the directional emission is more conducive to the determination of the target direction; the horizontal and vertical rotation capabilities enable the transducer to radiate sound in different directions, adapting to the changeable environment of the deep sea.

[0035] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. A full-space scanning annular transducer structure, characterized in that: The invention comprises a vertical rotating structure (1), a horizontal rotating structure (2) and a circular transducer (3); sound radiation is performed through the circular transducer (3); full-space scanning is performed through the vertical rotating structure (1) and the horizontal rotating structure (2); the horizontal rotating structure (2) is mounted on a support adapter plate (13) and is used to drive the support adapter plate (13) to rotate horizontally; the support adapter plate (13) is fixedly connected to two vertical support plates (10); a support frame is provided between the two vertical support plates (10); the support frame is fixedly connected to the circular transducer (3); the vertical rotating structure (1) is fixed on the vertical support plate (10) and drives the support frame to rotate, thereby driving the circular transducer (3) to rotate; The annular transducer (3) is composed of a wedge-shaped ceramic strip (4), a watertight epoxy layer (5), a sealing cover plate (6), and an external metal ring (7); the wedge-shaped ceramic strip (4) is inlaid into an annular structure, a sealing cover plate (6) is provided on the side of the annular structure, and a watertight epoxy layer (5) and an external metal ring (7) are sequentially sleeved outside the annular structure; when working, the wedge-shaped ceramic strip (4) vibrates radially, driving the watertight epoxy layer (5) and the external metal ring (7) to radiate sound; The vertical rotation structure (1) is composed of a transverse connecting rod (8), a transverse transfer rod (9), a vertical rotation motor (11) and a side baffle (12); the vertical rotation motor (11) is connected to the vertical support plate (10) by screws; the vertical rotation motor (11) is connected to the transverse transfer rod (9) by pins; the transverse transfer rod (9) is connected to the vertical support plate (10) by bearings and keeps free rotation; the transverse transfer rod (9) and the transverse connecting rod (8) are connected by screws to form a rectangular support frame; the transverse connecting rod (8) is connected to the sealing cover plate (6) of the annular transducer; when working, the vertical rotation motor (11) drives the support frame composed of the transverse transfer rod (9) and the transverse connecting rod (8), thereby enabling the annular transducer (3) to realize rotation scanning in the vertical direction; The horizontal rotating structure (2) is composed of a supporting base (17), a supporting bearing (16), a horizontal rotating motor (15), a sealing base (18), a sealing plate (19) and a watertight bearing (14), wherein the horizontal rotating motor (15), the sealing base (18), the sealing plate (19) and the watertight bearing (14) constitute a watertight motor; the watertight motor is fixed to the supporting adapter plate (13) via screw holes on the sealing base (18); the supporting adapter plate (13) is connected to the supporting base (17) via the supporting bearing (16) and is able to rotate freely in the horizontal direction; the watertight motor is connected to the supporting base (17) via a motor shaft; the supporting adapter plate (13) is connected to the vertical supporting plate (10) in the vertical rotating structure via screws; when the watertight motor is in operation, it drives the entire supporting adapter plate (13) to rotate horizontally.

2. The full-space scanning annular transducer structure according to claim 1, characterized in that: The sealing base (18) and the sealing plate (19) form a sealing shell, and the interior of the sealing shell is filled with castor oil.

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