Low-frequency slotted liquid wall coupling transducer for deep water

Abstract

The invention discloses a low-frequency slotted liquid wall coupling transducer for deep water. The transducer mainly comprises radiation cover plates, the radiation cover plates are located at the upper end and the lower end of the transducer, the radiation cover plates are sequentially bonded with a middle mass block through an end cover A, a piezoelectric ceramic vibrator and an end cover B, and a prestressed screw penetrates through the middles of the radiation cover plates to be fixed. A thin-wall cylindrical sleeve is a transducer shell. The thin-wall cylindrical sleeve is in decouplingconnection with the middle mass block through connecting rods and decoupling materials, the outer wall of the thin-wall cylindrical sleeve is in decoupling connection with four hoisting rods, and thecenter of the thin-wall cylindrical sleeve is slotted by a circle. The transducer has the key performances of a very low frequency, a small size, light weight, a broadband, high power, high efficiencyand the like, is more convenient to use and lower in cost, provides a technical basis for integration of a marine acoustic tomography subsurface buoy and a system, provides a technical means for monitoring a mesoscale process in a relatively large range, and serves remote underwater acoustic detection and communication, national marine resource development and national marine safety maintenance.

Description

technical field [0001] The invention relates to the field of acoustic transducers, in particular to a low-frequency slotted liquid wall coupling transducer for deep water. Background technique [0002] Most of the area covered by the ocean on the earth belongs to the deep sea with a water depth of more than 4,000 meters. Since only sound waves can achieve long-distance propagation in seawater, real-time, dynamic, and large-scale monitoring of the ocean requires the use of ocean acoustic tomography technology. Ocean acoustic tomography is to use the internal information of the ocean carried by the ocean acoustic field to take a "snapshot" of the interior of the vast sea area, which requires the use of several underwater acoustic emission transducers and receiving transducers. Since the absorption loss of sound wave propagation in the ocean decreases with the decrease of frequency, and to realize real-time, dynamic, and large-scale monitoring of the ocean, it is necessary to t...

AI Technical Summary

Problems solved by technology

The transducer is put on two thick ring shells at both ends of a Janus transducer. Although the problem of large size of the low-frequency Helmholtz liquid cavity is avoided, the size is relatively compact, but the weight of the two thick ring shells is still large; In addition, to set the radial vibration resonant frequency of the ring below 500Hz, the size and weight of the ring also need to be designed larger, so that it is not convenient to use the JHB transducer with a center frequency lower than 500Hz

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