Folding cover plate broadband underwater transducer

A technology of underwater acoustic transducers and folding cover plates, applied in the direction of transducers used underwater, can solve the problem of reducing the size of longitudinal vibration transducers, and meet the needs of array layout, compact structure, and small size Effect

Inactive Publication Date: 2011-03-30
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using the nesting technology of piezoelectric ceramic rings with different diameters, the resonant frequency of the manufactured longitudinal vibration transducer is about 1.7kHz, and the effective length is only 0.3m, which greatl

Method used

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  • Folding cover plate broadband underwater transducer
  • Folding cover plate broadband underwater transducer
  • Folding cover plate broadband underwater transducer

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Embodiment Construction

[0033] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0034] The present invention expands the frequency band of the longitudinal vibration transducer by using the principle of single-end excitation, and at the same time designs the non-working passive material part of the transducer into a folded form, thus reducing the length of the single-end excitation transducer. Finally, the small size and broadband working characteristics of the transducer are realized.

[0035] combine figure 1 The broadband underwater acoustic transducer with folded cover plate includes piezoelectric ceramic wafer stack, metal cover plates at the upper and lower ends and prestressed screw rod 5 . The piezoelectric ceramic chip stack is formed by alternately stacking piezoelectric ceramic rings 3 and thin metal sheets 4. The polarization direction of the piezoelectric ceramic rings 3 is along the thickness direction, and the electrode leads ...

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Abstract

The invention provides a folding cover plate broadband underwater transducer comprising a piezoceramic wafer stack, an upper-end metal cover plate, a lower-end metal cover plate and a prestressed screw rod, wherein the piezoceramic wafer stack is formed by alternately stacking piezoceramic rings and thin metal pieces, the polarization direction of the piezoceramic rings is along a thickness direction, an electrode leading wire is welded on the thin metal pieces, and the upper-end metal cover plate forms a folding shape by an inner cover plate and an outer cover plate. The folding cover plate broadband underwater transducer adopts a single-end excitation principle, a work bandwidth exceeds an octave, a non-operating passive material part is designed into a folding type to reduce dimension;and with small volume and compact structure, the folding cover plate broadband underwater transducer is suitable for array requirements. The folding cover plate broadband underwater transducer can beapplied to underwater communication, detection, target location, track, and the like and is an important part for sonar application.

Description

technical field [0001] The present invention relates to underwater acoustic transducers. Background technique [0002] Sound waves are carriers of information and energy underwater. Underwater acoustic equipment relies on sound waves to transmit information. It uses sound waves as an information carrier to realize the detection, positioning, identification and communication of underwater targets. So far, underwater acoustic equipment is still the most effective for underwater information collection and information processing. equipment. The underwater acoustic transducer is used to transmit and receive sound waves underwater and is an important part of underwater acoustic equipment. When in the transmitting state, the electromagnetic vibration energy is converted into mechanical vibration energy, thereby pushing the water medium to vibrate and radiate sound energy. The "transducer" in the general sense refers to this type of transmitter; when in the receiving state, its T...

Claims

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Application Information

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IPC IPC(8): H04R1/44
Inventor 兰宇
Owner HARBIN ENG UNIV
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