Low-frequency broadband efficient array forming structure based on bent disc transducer

Abstract

The invention discloses a low-frequency broadband efficient array forming structure based on a bent disc transducer, which mainly comprises a transmitting array. The transmitting array comprises a plurality of groups of transducer units, the transmitting array is formed by arranging a plurality of groups of same transducer units at equal intervals in the horizontal direction, and the postures of the transducer units in the transmitting array are consistent; the acoustic center distance between the transducer units is not greater than the half wavelength of the transducer units at a resonant frequency point, and therefore the near-field mutual radiation influence on each group of transducer units is kept consistent; each transducer unit is formed by arranging one or more bent disc transducers in the axial direction. Radiation impedance of the bent disc transducers can be changed by arraying the bent disc transducers according to a specific arraying mode, and therefore resonant frequencyof a transmitting array is reduced; working bandwidth is expanded, electro-acoustic efficiency is improved; the transmitting array is enabled to meet development requirements of a future maneuveringdetection system.

Description

technical field [0001] The invention relates to the field of curved disk transducers, and mainly relates to a low-frequency broadband high-efficiency array structure based on curved disk transducers. Background technique [0002] With the continuous implementation of the ocean power strategy, the underwater acoustic technology has been continuously improved, and the sonar equipment platform has shown diversified development. Among them, mobile deployment underwater acoustic detection systems such as towed detection sonar, airborne detection sonar and UUV / AUV are developing most rapidly. The mobile deployment underwater acoustic detection system has attracted much attention because of its advantages of flexibility, convenience, fast response and being away from platform vibration. The future development prospects and demands are extremely considerable. [0003] The installation platform of the mobile deployment underwater acoustic detection system has a small space and a lig...

AI Technical Summary

Problems solved by technology

[0004] Because it is in the bending vibration mode, the bending disc transducer and its conventional array method (half-wavelength line array) have the following disadvantages: the electroacoustic efficiency at the resonance point is high, but the working bandwidth is generally narrow, and at the resonance point The electro-acoustic efficiency drops significantly near the point, so the power density in the broadband is low

With the development of underwater acoustic detection technology in the direction of low frequency, broadband and high power, the curved disc transducer and its conventional array method are difficult to meet the development needs of low-frequency underwater acoustic remote detection and communication technology.

Because it works in the first-order bending vibration mode, the working bandwidth of the bending disc transducer and its conventional array is narrow, and the average electro-acoustic conversion efficiency in the wide frequency band is low, and its resonance frequency is determined by the material and structural design , the resonant frequency cannot be lowered by the mutual radiation effect

Images