Multibeam ultrasonic fish detector

Abstract

A fish detector of multi-wave beam ultrasonic ray type consists of above-water subunit, transverter array and receiving-transmitting switch. It is featured as forming above-water sub-unit by industrial control computer, signal generating unit, signal emitting unit, signal nursing unit, signal collecting / processing unit, display and storage, enabling to obtain more accurate information of fish school since multi-channel transverter is used in detector for having intensity of receiving echo raised.

Description

technical field [0001] The invention relates to a multi-beam ultrasonic fish finder for efficient acquisition of wide-fan fish school information. Background technique [0002] In fishery development, in order to reduce the blindness of fishing and improve economic benefits, basically all large, medium and small fishing boats are generally equipped with fish finder equipment. At present, the information, patents and products about fish finders that can be found at home and abroad basically involve the design and application of vertical single-beam fish finders. The appearance of this prototype fish finder, which was born in the 1950s, once brought a revolution to the world's marine fisheries, but in the 21st century, which is more dependent on marine fisheries, their defects and shortcomings have become increasingly apparent. [0003] The working principle of the vertical single-beam fish finder is as follows: it uses a single beam to transmit ultrasonic waves directly belo...

AI Technical Summary

Problems solved by technology

In order to increase the detection range of the vertical single-beam fish finder and reduce the detection blind zone, a very wide detection beam (usually up to ±40°) is required, and in order to achieve a longer detection distance, a high transmission power is required , the two are a contradiction; the single-beam fish finder also has a defect: it cannot distinguish the thickness and width of the fish school, which brings difficulties to the net fishing; and, using the single-beam fish finder equipment, in order to improve the detection The probability of fish schools must also be reduced, and the search interval of fishing boats must be reduced. This low fish detection efficiency directly leads to an increase in the cost of fishery development

According to articles published in domestic authoritative journals such as "Chinese Fishery Science" and "Journal of Fisheries Science", in recent years, fishing boats equipped with the above-mentioned advanced fishing aid equipment in neighboring countries of our country have frequently gone deep into traditional fishing grounds in our country, adopting fast detection, fast catching, and fast fishing. The strategy of finishing and running has seriously affected my country's fishery production

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