CN-121977687-A - Two-dimensional vector hydrophone

CN121977687ACN 121977687 ACN121977687 ACN 121977687ACN-121977687-A

Abstract

The invention provides a two-dimensional vector hydrophone, which has a simple overall structure, is easy to integrate and is convenient for mass production. The two-dimensional vector hydrophone comprises a shell, a tri-lamination vector channel and a bi-lamination scalar channel, wherein the tri-lamination vector channel is arranged in the shell and comprises a supporting element and two tri-laminations which are arranged on the supporting element and are in a cantilever beam structure in an orthogonal mode, the tri-laminations adopt a sandwich structure that two ends of a rectangular thin plate are bonded with piezoelectric ceramic rectangular plates, the bi-lamination scalar channel comprises two bi-laminations, the bi-laminations adopt a structure that a round thin plate is bonded with a round piezoelectric ceramic wafer in a single-sided mode, the two bi-laminations are symmetrically arranged at the center positions of two opposite faces of the outer circumferential face of the shell, the two bi-laminations are connected in parallel in the shell, and a watertight packaging layer is arranged on the outer surface of the shell.

Inventors

MA XIN
GUO QIAOHE
HUANG XIN
YANG DONGCHUAN

Assignees

宜昌测试技术研究所

Dates

Publication Date: 20260505
Application Date: 20251224

Claims (7)

1. A two-dimensional vector hydrophone is characterized by comprising a shell, a tri-laminate vector channel and a double-laminate scalar channel; the tri-lamination vector channel is arranged in the shell and comprises a supporting element (6) and two tri-laminations (4) which are arranged on the supporting element (6) in an orthogonal mode and are in a cantilever structure, wherein the tri-laminations (4) adopt a sandwich structure that two ends of a rectangular thin plate are bonded with piezoelectric ceramic rectangular plates; the double-lamination scalar channel comprises two double-lamination sheets (5) which are connected in parallel, wherein the double-lamination sheets (5) adopt a structure that a round thin plate (51) is bonded with a round piezoelectric ceramic wafer (52) on one side, and the two double-lamination sheets (5) are symmetrically arranged at the center positions of two opposite faces of the outer circumference of the shell; the outer surface of the shell is provided with a watertight packaging layer.
2. The two-dimensional vector hydrophone of claim 1, further comprising a suspension unit for suspending the watertight-packed vector hydrophone; the suspension unit comprises a suspension frame (11) and an elastic connection, The vector hydrophone after watertight encapsulation is suspended in the suspension frame (11) through an upper elastic connecting piece and a lower elastic connecting piece.
3. The two-dimensional vector hydrophone of claim 1 or 2, wherein the housing is a metal housing comprising a cylindrical shell (3), an upper end cap (1) abutting the upper end of the cylindrical shell (3), and a lower end cap (2) abutting the lower end of the cylindrical shell (3).
4. A two-dimensional vector hydrophone as recited in claim 3, wherein the support element (6) is arranged inside the lower end cap (2) in the same shape as the inner shape of the lower end cap (2), and is integrally connected with the lower end cap (2).
5. The two-dimensional vector hydrophone of claim 1 or 2, wherein the tri-laminate (4) is arranged vertically, and the lower end is connected with the supporting element (6) through a downward extension of the rectangular sheet in the middle of the tri-laminate (4) to form a cantilever structure.
6. Two-dimensional vector hydrophone according to claim 1 or 2, characterized in that watertight cables (9) penetrate the housing, electrically connected to the tri-and bi-laminated scalar channels, respectively, for transmitting signals of the tri-and bi-laminated scalar channels to watertight connectors (10).
7. The two-dimensional vector hydrophone of claim 3, wherein circular through holes for installing double laminations (5) are formed at two symmetrical positions of the cylindrical shell (3), and the double laminations (5) are adhered to shaft shoulders in the circular holes.

Description

Two-dimensional vector hydrophone Technical Field The invention relates to a hydrophone, in particular to a two-dimensional vector hydrophone, and belongs to the technical field of underwater sound detection. Background There is an increasing demand for marine resource development, underwater target detection, and marine environmental monitoring by researchers. The traditional scalar hydrophone can only measure scalar signals (sound pressure) in a sound field, and the vector hydrophone can simultaneously measure scalar and vector signals (particle vibration velocity, acceleration and sound pressure gradient) of the sound field, has stronger isotropic noise interference resistance, can more accurately orient and identify underwater targets, and has more obvious advantages in complex marine environments. The traditional vector hydrophone has the problems of large size, complex structure and the like, and along with the wide application of a small underwater unmanned detection platform (such as an underwater glider and an unmanned submarine), the volume of the vector hydrophone is more required. The small-size vector hydrophone can meet the carrying requirements of the small platforms, realize real-time monitoring and orientation of underwater targets, and simultaneously reduce the cost of the whole system. The small-size vector hydrophone is easy to integrate and manufacture into an array for use in a towed array or a bow array. In order to facilitate the use of large-scale array formation and improve the technical index of a sonar system, the vector hydrophone needs to be assembled and manufactured under a strict process in mass production, and the process consistency requirement of the whole manufacturing process is high. Therefore, from the practical engineering application point of view, a novel vector hydrophone is needed, so that the small-size requirement can be met, high-reliability and high-consistency mass production can be realized, and the novel vector hydrophone has the characteristics of light weight, easiness in integration and array. Disclosure of Invention In view of the above, the invention provides a two-dimensional vector hydrophone, wherein a vector channel adopts a three-lamination cantilever beam structure integrally connected with a shell, and a scalar channel adopts a two-lamination parallel connection mode, so that the two-dimensional vector hydrophone has a simple integral structure, is easy to integrate and is convenient for mass production. The technical scheme of the invention is that the two-dimensional vector hydrophone comprises a shell, a tri-lamination vector channel and a double-lamination scalar channel; The tri-lamination vector channel is arranged in the shell and comprises a supporting element and two tri-laminations which are arranged on the supporting element in an orthogonal manner and are in a cantilever structure, wherein the tri-laminations adopt a sandwich structure that two ends of a rectangular thin plate are bonded with piezoelectric ceramic rectangular plates; the double-lamination scalar channel comprises two double-lamination sheets connected in parallel, wherein the double-lamination sheets adopt a structure that a round piezoelectric ceramic wafer is bonded on one side of a round thin plate, and the two double-lamination sheets are symmetrically arranged at the center positions of two opposite faces of the outer circumference of the shell; the outer surface of the shell is provided with a watertight packaging layer. As a preferred mode of the invention, the vector hydrophone further comprises a suspension unit for suspending the vector hydrophone after watertight packaging; the suspension unit comprises a suspension frame and an elastic connection member, The vector hydrophone after watertight encapsulation is hung in the hanging frame through the upper elastic connecting piece and the lower elastic connecting piece. As a preferred mode of the present invention, the housing is a metal housing, and includes a cylindrical housing, an upper end cap abutting on the upper end of the cylindrical housing, and a lower end cap abutting on the lower end of the cylindrical housing. In a preferred embodiment of the present invention, the support member is formed in the same shape as the inner shape of the lower end cap, and is disposed inside the lower end cap and integrally connected to the lower end cap. As a preferred mode of the invention, the tri-laminate is vertically arranged, and the lower end is connected with the supporting element through the downward extension part of the rectangular thin plate in the middle of the tri-laminate to form a cantilever beam structure. As a preferred mode of the invention, watertight cables penetrate the housing and are electrically connected with the tri-laminate vector channel and the bi-laminate scalar channel respectively, and signals of the tri-laminate vector channel and the bi-laminate scalar channel are transmitted to