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Broadband acoustic element suitable for long-distance high-resolution fish finder

A high-resolution, fish finder technology, applied in the field of broadband acoustic elements, can solve problems such as structure and performance to be improved, and achieve the effect of ensuring free boundary conditions, increasing working bandwidth, and increasing sound source level

Pending Publication Date: 2020-12-18
上海船舶电子设备研究所
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  • Description
  • Claims
  • Application Information

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  • Broadband acoustic element suitable for long-distance high-resolution fish finder
  • Broadband acoustic element suitable for long-distance high-resolution fish finder
  • Broadband acoustic element suitable for long-distance high-resolution fish finder

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[0029] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0030] Such as Figure 1-5 As shown, a broadband acoustic element suitable for long-distance high-resolution fish finders provided according to the present invention includes: front cover plate 1, electrode sheet 2, piezoelectric crystal stack 3, rear cover plate 4, prestressed Screw 5, four-legged bracket 6 and matching circuit 7; the prestressed screw 5 includes: the front cover 1, the electrode piece 2, the piezoelectric crystal stack 3 and the rear cover 4 are connected; the front cover 1 , the con...

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Abstract

The invention provides a broadband acoustic element suitable for a long-distance high-resolution fish finder. The broadband acoustic element comprises a front cover plate (1), an electrode slice (2),a piezoelectric crystal stack (3), a rear cover plate (4), a prestressed screw (5), a four-leg bracket (6) and a matching circuit (7), the prestressed screw (5) comprises a front cover plate (1), an electrode slice (2), a piezoelectric crystal stack (3) and a rear cover plate (4) which are connected; the front cover plate (1), the electrode slice (2), the piezoelectric crystal stack (3) and the rear cover plate (4) are connected; the four-leg bracket (6) is sleeved on a screw cap of the prestressed screw (5); and the matching circuit (7) is arranged in a positioning groove of the four-leg bracket (6). According to the invention, PZT-8 type piezoelectric ceramic with high tensile strength, high stability and high mechanical Q value is selected as a driving element of a transducer, so that the transducer can bear relatively high voltage, and the sound source level of the transducer is increased.

Description

technical field [0001] The invention relates to the technical field of fish finders, in particular to a broadband acoustic element suitable for long-distance high-resolution fish finders. Background technique [0002] All coastal countries in the world have made the development of the ocean, the development of marine economy and marine industry a basic national policy. Among them, the exploration, development and protection of marine biological resources have become the main content. The fish finder is an important instrument and equipment that uses the principle of acoustic echo to detect fish schools in the sea. For now, there are generally only two types of fish detection equipment in various countries in the world, one is a vertical fish finder, and the other is a horizontal fish finder. Since the vertical fish finder needs the ship to sail above the fish school to detect and cannot detect the fish school around the hull, the horizontal fish finder that can realize ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/96G01S7/521
CPCG01S15/96G01S7/521
Inventor 张鸿磊胡健辉王敏慧王艳赵欢张睿
Owner 上海船舶电子设备研究所
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