A cross-shaped circular transducer

Abstract

The present invention provides a cross-shaped circular transducer, comprising a wedge-shaped piezoelectric ceramic strip A, a transition metal block A, a transition metal block B and a wedge-shaped piezoelectric ceramic strip B. The wedge-shaped piezoelectric ceramic strip A is respectively connected to two side surfaces of the transition metal block A and the transition metal block B to form a circular transducer A. The wedge-shaped piezoelectric ceramic strip B is respectively connected to the other two side surfaces of the transition metal block A and the transition metal block B to form a circular transducer B. The center line connecting the transition metal block A and the transition metal block B is in a vertical state. The circular transducer A and the circular transducer B cross each other vertically in a "cross" shape to form a transducer structure. The beneficial effects of the present invention are as follows: the present invention adopts a cross-shaped structure of two circular rings, so that the circular rings can achieve both a higher sound source level and horizontal non-directivity in the horizontal direction; it solves the problem that the mosaic circular ring transducer has a higher axial response, but a larger response fluctuation, and is difficult to achieve omnidirectional operation.

Description

Technical Field

[0001] The present invention relates to the field of transducers, and mainly relates to a cross-type circular transducer. 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 Annular transducers have the advantages of mature technology, high power capacity, strong resistance to hydrostatic pressure, and radial non-directionality. They are widely used in various fields such as underwater acoustic detection and communications.

[0003] The inlaid ring transducer can be divided into two directions: radial and axial. The sound field in the axial direction of the transducer is formed by the in-phase superposition of radial vibrations. When the height of the transducer is small, the radial vibrations are all superimposed in the axial direction, and the axial sound source level is much larger than the radial sound source level. For example, a ring transducer with an operating frequency of 1.5kHz, a transducer diameter of about 700mm, a transducer height of about 200mm, and an 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, such as Figure 2 shown.

[0004] 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 omnidirectional radiation.

[0005] Ring transducers have minimal radial response fluctuations, enabling omnidirectional radiation. Axial sound energy is superimposed in phase along the axial direction, resulting in a higher response, but with significant directional fluctuations, making omnidirectional operation difficult. In engineering applications, to achieve horizontal, omnidirectional sound radiation, ring transducers typically utilize horizontal radial radiation, placing the mosaic ring transducers vertically. This placement prevents the utilization of the greater axial sound source level, resulting in greater wasted vertical sound energy. Summary of the Invention

[0006] In order to solve the problem that the axial sound source level is high but the directivity fluctuates greatly, the present invention provides a cross-type circular transducer, which solves the problem that the inlaid circular transducer has a high axial response but large response fluctuations and is difficult to achieve omnidirectional operation.

[0007] The objective of the present invention is achieved through the following technical solution: A cross-type circular transducer, comprising a wedge-shaped piezoelectric ceramic strip A, a transition metal block A, a transition metal block B, and a wedge-shaped piezoelectric ceramic strip B, wherein the wedge-shaped piezoelectric ceramic strip A is connected to two side surfaces of the transition metal block A and the transition metal block B, respectively, to form a circular transducer A, and the wedge-shaped piezoelectric ceramic strip B is connected to the other two side surfaces of the transition metal block A and the transition metal block B, respectively, to form a circular transducer B, wherein the center line connecting the transition metal block A and the transition metal block B is vertical, and the circular transducers A and B cross each other vertically in a "cross" shape to form a transducer structure.

[0008] The structure of the transition metal block A is the same as that of the transition metal block B. The transition metal block A includes a metal block body and a connecting block. The metal block body is a rectangular parallelepiped structure. The four sides of the metal block body are respectively provided with connecting blocks, which are respectively connected to the side surfaces of the wedge-shaped piezoelectric ceramic strip A and the wedge-shaped piezoelectric ceramic strip B.

[0009] The beneficial effects of the present invention are as follows: the present invention adopts a cross-shaped structure of two circular rings, so that the circular rings can achieve both a higher sound source level and horizontal non-directivity in the horizontal direction; it solves the problem that the inlaid circular ring transducer has a high axial response but large response fluctuations, making it difficult to achieve omnidirectional operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of the traditional inlaid ring transducer structure.

[0011] Figure 2 Schematic diagram of the axial and radial voltage response curves of the inlaid ring transducer.

[0012] Figure 3 Schematic diagram of the directivity perpendicular to the radial direction and the directivity perpendicular to the axial direction at the resonance point.

[0013] Figure 4 It is a structural schematic diagram of the present invention.

[0014] Figure 5 Schematic diagram of the main structure of the transition metal block.

[0015] Figure 6 Schematic diagram of the three-dimensional structure of a transition metal block.

[0016] Figure 7 Schematic diagram of the horizontal directivity of the cross-shaped circular transducer.

[0017] Description of the accompanying drawings: wedge-shaped piezoelectric ceramic strip A1, transition metal block A2, metal block body 2-1, connecting block 2-2, transition metal block B3, wedge-shaped piezoelectric ceramic strip B4. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings:

[0019] like Figure 4 As shown, a cross-type circular transducer includes a tangentially polarized wedge-shaped piezoelectric ceramic strip A1, a transition metal block A2, a transition metal block B3, and a tangentially polarized wedge-shaped piezoelectric ceramic strip B4. The wedge-shaped piezoelectric ceramic strip A1 is connected to two side surfaces of the transition metal blocks A2 and B3, respectively, to form a circular transducer A. The wedge-shaped piezoelectric ceramic strip B4 is adhered to the other two side surfaces of the transition metal blocks A2 and B3, respectively, to form a circular transducer B. The center line connecting the transition metal blocks A2 and B3 is vertical, and the circular transducers A and B cross each other vertically in a "cross" shape to form a transducer structure.

[0020] The present invention proposes a cross structure of two inlaid circular rings, which utilizes the two crossed inlaid circular ring transducers to achieve non-directional sound radiation in the horizontal direction, so that the circular rings can achieve both a higher sound source level and horizontal non-directionality in the horizontal direction.

[0021] like Figure 5-6 As shown, the structure of the transition metal block A2 is the same as that of the transition metal block B3. The transition metal block A2 includes a metal block body 2-1 and a connecting block 2-2. The metal block body 2-1 is a cube-like structure with an arc surface on the top (concentric with the corresponding circular ring). The four side surfaces of the metal block body 2-1 are respectively provided with connecting blocks 2-2, and the connecting blocks 2-2 are respectively connected to the side surfaces of the wedge-shaped piezoelectric ceramic strip A1 and the wedge-shaped piezoelectric ceramic strip B4.

[0022] When the transducer is in use, the center line connecting the transition metal block A2 and the transition metal block B3 is in a vertical state, that is, the planes where the two rings are located are in a vertical state, that is, the axial directions of the two rings are in a horizontal state.

[0023] When the transducer is working, it works separately in the horizontal orthogonal directions to form a sound field with a certain directionality. The two orthogonal sound fields are superimposed on each other, which ultimately reduces the sound field fluctuations in the horizontal direction and achieves high sound source level and non-directional sound radiation. Figure 7 This is the horizontal directivity diagram of the cross-ring transducer. It can be seen that after the improvement, the directivity fluctuation of the transducer is reduced from 14dB to 3.5dB, which can basically achieve horizontal non-directional sound radiation and the directivity performance is greatly improved.

[0024] 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 scope of protection of the claims attached to the present invention.

Claims

1. A cross-shaped ring transducer, characterized in that: The invention comprises a wedge-shaped piezoelectric ceramic strip A (1), a transition metal block A (2), a transition metal block B (3) and a wedge-shaped piezoelectric ceramic strip B (4), wherein the wedge-shaped piezoelectric ceramic strip A (1) is respectively connected to two side surfaces of the transition metal block A (2) and the transition metal block B (3) to form a circular transducer A, and the wedge-shaped piezoelectric ceramic strip B (4) is respectively connected to the other two side surfaces of the transition metal block A (2) and the transition metal block B (3) to form a circular transducer B, the center line connecting the transition metal block A (2) and the transition metal block B (3) is in a vertical state, and the circular transducer A and the circular transducer B cross each other vertically in a "cross" shape to form a transducer structure; The structure of the transition metal block A (2) is the same as that of the transition metal block B (3). The transition metal block A (2) comprises a metal block body (2-1) and a connecting block (2-2). The metal block body (2-1) is a rectangular parallelepiped structure. The four side surfaces of the metal block body (2-1) are respectively provided with connecting blocks (2-2). The connecting blocks (2-2) are respectively connected to the side surfaces of the wedge-shaped piezoelectric ceramic strip A (1) and the wedge-shaped piezoelectric ceramic strip B (4).

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