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Towing type horizontal fishing-exploring instrument

A fish finder and towed technology, which is applied in the field of batch fishing detection devices, can solve the problem of short distance, generally between tens of meters to hundreds of meters, and within one kilometer, so as to achieve low working frequency and high efficiency. The effect of signal-to-noise ratio and stable performance

Inactive Publication Date: 2008-07-30
HARBIN ENG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its essence is active sonar, the working frequency is generally tens of kilohertz to hundreds of kilohertz, the disadvantage is that the action distance is short, generally between tens of meters to hundreds of meters, within one kilometer

Method used

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  • Towing type horizontal fishing-exploring instrument
  • Towing type horizontal fishing-exploring instrument
  • Towing type horizontal fishing-exploring instrument

Examples

Experimental program
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Embodiment Construction

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

[0034] The towed horizontal fish finder consists of a towing body, a towing cable, a multi-channel data collector, a signal processor and a terminal display. The towing body is made of aluminum alloy and glass fiber reinforced plastics. Two identical vector hydrophones are installed in the towing body. The X-axis direction is forward, which is consistent with the direction of the towing body. The time difference between the arrival time of the propeller noise of the fishing boat and the two sensors can partially offset the noise of the own ship and improve the detection ability of the noise of the fish school. Theoretical studies have shown that under ideal conditions, this method can offset up to 40 decibels of the noise of the own ship. Moreover, the vector hydrophones can also be dynamic backups for each other. Even if one of them is damaged for some reaso...

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Abstract

The invention relates to a towing horizontal fishery detector, comprising a towing body, a towing rope, a multi-channel data acquisition unit, a signal processor and a terminal display, wherein two duplicate vector hydrophones are installed in the towing body with an X-direction parallelled with the direction of the towing body and a Y-direction perpendicular to the direction of the towing body; the towing rope is a multi-core bearing cable armored with TELFON; the vector hydrophones are connected with the multi-channel data acquisition unit via the towing rope; the multi-channel data acquisition unit comprises an analog signal pretreatment circuit and a data acquisition circuit that are integrally designed in an electronic cabinet; and the multi-channel data acquisition unit is connected with a computer. The invention integrates the novel vector hydrophone technique and modern signal processing technique to provide a passive type fishery detector, which has the advantages of low cost, stable performance, easy operation and good practicability.

Description

(1) Technical field [0001] The invention relates to a detection device for batch fishing. Specifically, it is a passive fishing detection sonar. (2) Background technology [0002] With the development of the national economy, people's demand for marine resources is increasing day by day, and the development of fishery resources has been paid more and more attention. The fish finder is installed on the boat and uses sound waves to detect the presence, location, size, and type of fish schools when the boat is sailing. It has gradually become the consensus of people to make full and reasonable use of fish detection sonar technology. [0003] From the perspective of domestic and foreign development, the use of foreign fish finders started earlier, and has now developed to a very high level. Existing fish finder is the most representative with the product of British Lei Song (Raymarine) company. Leisong L265 depth sounding fish finder is equipped with a dual-frequency probe, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/96G01S7/56
Inventor 杨士莪于铭屠庆平王智元
Owner HARBIN ENG UNIV
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