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Cylindrical stacked chip hydroacoustic transducer

An underwater acoustic transducer, cylindrical technology, applied to transducers, piezoelectric/electrostrictive transducers, sensors and other directions used underwater, can solve problems such as low sensitivity, and achieve high sensitivity and sound energy. The effect of high density and improved sensitivity

Inactive Publication Date: 2011-12-14
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cylindrical and spherical transducers have simple structures, large beam directivity width (opening angle) (horizontal or spatial omnidirectional), but low sensitivity

Method used

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  • Cylindrical stacked chip hydroacoustic transducer
  • Cylindrical stacked chip hydroacoustic transducer
  • Cylindrical stacked chip hydroacoustic transducer

Examples

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Embodiment Construction

[0037] The cylindrical stacked wafer transducer of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0038] Such as Figure 6 As shown, the cylindrical stacked wafer transducer of this example includes a piezoelectric wafer stack composed of piezoelectric ceramic wafers 4, upper and lower metal cover plates 2, prestressed screws 1, rubber sheet 3, base 6, waterproof and sound-permeable layer 9 and output cable 8 etc. In the piezoelectric chip stack, the piezoelectric ceramic chip 4 is made of a circular piezoelectric ceramic PZT with a hole in the center. The outer diameter of the chip is 23 mm, the inner diameter is 5 mm, and the thickness of each chip is 1 mm. Every four wafers form a group of piezoelectric wafers, and the polarization directions of adjacent wafers are opposite (see Figure 7 ). The piezoelectric chip stack is composed of 2 groups of piezoelectric chips. The piezoelectric chip groups are se...

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Abstract

The invention provides an underwater acoustic transducer, which comprises a stack of piezoelectric ceramic wafers and metal cover plates at the upper and lower ends thereof. The stack of piezoelectric ceramic wafers is cylindrical and is formed by stacking a plurality of circular piezoelectric ceramic wafers. , the polarization direction of the piezoelectric ceramic wafer is along the thickness direction; every 2 to 8 piezoelectric ceramic wafers form a group, and the wafer stack contains 1 or more groups of wafers, and each group is separated by a rubber sheet; adjacent wafers Between, and between the chip and the rubber sheet, there is a metal sheet, and the electrode lead is welded on the metal sheet; the piezoelectric ceramic chip stack and the upper and lower metal cover plates are also separated by a rubber sheet. The cylindrical stacked chip transducer of the present invention not only maintains the characteristics of high emission density and high sensitivity of the traditional stacked chip transducer by rationally designing the diameter of the piezoelectric stacked chip, but also can change the piezoelectric stacked chip transducer The thickness of the chip stack or the number of groups are adjusted to adjust the axial directivity opening angle of the transducer.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic detection, and in particular relates to an underwater acoustic transducer which uses the piezoelectric effect of piezoelectric ceramics to emit underwater acoustic signals to realize underwater detection, and can be widely used in underwater communication, detection, target positioning, and tracking etc., are important components used by sonar. Background technique [0002] The underwater acoustic transducer is a device that converts sound energy and electrical energy into each other. Its status is similar to that of an antenna in radio equipment, and it is a key device for transmitting and receiving sound waves underwater. Underwater detection, identification, communication, as well as marine environment monitoring and the development of marine resources are inseparable from underwater acoustic transducers. Transducers can be divided into transmitting type, receiving type and dual-pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R17/00H04R1/44
Inventor 王丽坤董天晓秦雷李莉张金铎
Owner BEIJING INFORMATION SCI & TECH UNIV
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