An eight-beam broadband phased array transducer and its preparation method

A beam broadband, phased array technology, applied in the field of eight-beam broadband phased array transducer and its preparation, can solve problems such as limited accuracy and limited data amount, achieve improved measurement accuracy, large signal strength, and be beneficial to multiple The effect of the calculation of the Puller shift

Active Publication Date: 2022-02-11
SHANGHAI ACOUSTICS LAB CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, DVL has two beams in two mutually perpendicular directions along the front, back and left and right of the carrier, and the amount of data collected is limited, which also limits the accuracy

Method used

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  • An eight-beam broadband phased array transducer and its preparation method
  • An eight-beam broadband phased array transducer and its preparation method
  • An eight-beam broadband phased array transducer and its preparation method

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Embodiment Construction

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0035] In order to make the drawing concise, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. Herein, "a" not only means "only one", but also means "more than one".

[0036] An eight-b...

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Abstract

The invention discloses an eight-beam broadband phased array transducer and a preparation method thereof, comprising: a metal base, a backing foam, a composite material piezoelectric sheet and a matching layer arranged in sequence; the composite material piezoelectric sheet comprises a plurality of Piezoelectric elements and decoupling materials filled between the elements, wherein the piezoelectric elements are arranged in a sparse phased array, and the positive and negative electrodes of the piezoelectric elements are respectively provided with electrode sheets for applying different phases of electricity. signal to form four beams in two mutually perpendicular directions; the matching layer includes a plurality of matching elements and a decoupling material filled between the elements, wherein the matching element gap is aligned with the piezoelectric element gap and the spacing is consistent . The present invention can realize eight-beam DVL with four beams in two vertical directions, and realize broadband, which is not only more conducive to the calculation of Doppler frequency shift, but also improves the signal strength of the received echo signal, Improve measurement accuracy and reduce measurement blind spots.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic transducers, in particular to an eight-beam broadband phased array transducer and a preparation method thereof. Background technique [0002] In recent years, with the rise of underwater vehicles, especially underwater untethered vehicles (AUV), the role of acoustic Doppler velocimetry (DVL) has become increasingly important. AUV wants to realize autonomous navigation underwater, in which the speed measurement unit is essential, and the most effective way to measure speed is to obtain it through DVL. The working principle of DVL is to use phased emission technology to transmit four beams to the seabed along the front, rear, left, and right directions of the carrier. The sound waves reach the seabed or other scattering media (water flow layer, etc.) and are reflected. , the frequency of the echo signal produces a Doppler frequency shift, and then performs beamforming through phase dela...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/06
CPCB06B1/0625
Inventor 周博文许伟杰童晖张彬张旭陆家威
Owner SHANGHAI ACOUSTICS LAB CHINESE ACADEMY OF SCI
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