Conformal driving three-lobed flextensional transducer

Abstract

The invention belongs to the field of underwater acoustic communication and particularly relates to a conformal driving three-lobed flextensional transducer. The conformal driving three-lobed flextensional transducer comprises a three-lobed flextensional casing, fan-shaped ceramic stacks, a rubber pad, upper and lower cover plates, a connecting screw and a watertight cable head, wherein the three-lobed flextensional casing is a tensile structure with three arc-shaped embedding ports, the three arc-shaped embedding ports are connected with the fan-shaped ceramic stacks, upper and lower end surfaces of the three-lobed flextensional casing are connected with the rubber pad, the upper and lower cover plates are connected through the connecting screw, and the watertight cable head is connectedwith the three fan-shaped ceramic stacks through electrical connection holes. The conformal driving three-lobed flextensional transducer is advantaged in that fan-shaped active driving and three-lobedflextensional casing structures are utilized to realize a conformal driving mode, the conformal driving flextensional transducer has lower bending vibration frequency characteristics, the transduceris made to realize lower resonance frequency operation, moreover, the electric driving phase of the three fan-shaped ceramic stacks can be adjusted to excite different order vibration modes, and omni-directional, 8-shaped type directional and other radiations are achieved.

Description

technical field [0001] The invention belongs to the field of underwater acoustic communication, and in particular relates to a conformally driven three-lobe flexural transducer. Background technique [0002] In recent years, active and passive noise reduction technology has been widely used in advanced quiet submarines. The target strength and radiation noise are greatly reduced, which makes the passive sonar range sharply reduced. In order to achieve long-distance detection of submarines, it is necessary to use lower frequencies The low-frequency underwater acoustic emission transducer is the core component of active sonar, and the research on low-frequency and high-power transducers is the key technology to realize low-frequency active detection. The lower the frequency of the transducer, the smaller the radiation resistance, and the larger the size and weight of the transducer. Small target platforms in water have strict requirements on the size of low-frequency transmit...

AI Technical Summary

Problems solved by technology

Due to the space and load limitations of the anti-submarine helicopter itself, it is currently impossible to fit a low-frequency sonar with a large size and weight. Therefore, the research on low-frequency and small-size transducers is also the core problem to be solved to realize long-distance submarine detection by flying sonar.

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