Multi-beam fishing sonar signal processing method and system

Abstract

The invention provides a multi-beam fishing sonar signal processing method and system, and the process of receiving beams in the method comprises the following steps that (S1) each signal processing board carries out the beam forming of each to-be-received beam according to a signal received by an array in communication connection with the signal processing board, so as to obtain the signals of apart of beams of each to-be-received beam; (2) each signal processing board carries out matched filtering and extraction on the obtained signals of the partial wave beams in sequence; (S3) each signalprocessing board transmits the extracted signals of the partial wave beams to a host through a switch; and (S4) the host superposes each part of beams of the to-be-received beams to obtain signals ofthe to-be-received beams. According to the invention, by adding the matched filtering link in each signal processing board and extracting the matched filtering link, the problem that the signal ratebetween the signal processing board and the host is too high in the prior art is solved, and the phase noise introduced in the extraction process is reduced at the same time.

Description

technical field [0001] The invention relates to the field of fishery equipment, in particular to a multi-beam fishing sonar signal processing method and system. Background technique [0002] Fishing sonar (commonly known as "fish finder"), as one of the most widely used and typical fishing aids in marine fisheries, is the main tool for detecting the quantity and spatial distribution of marine fish resources using hydroacoustic methods. The types of fish finders can be divided into vertical single-beam fish finders, horizontal fish finders, vertical dual-frequency fish finders, split-beam fish finders and multi-beam fish finders, among which multi-beam fishing sonar can obtain farther The spatial detection distance and higher angular resolution capabilities are widely used in the detection of fish schools in pelagic fishery trawling and purse seine fishing, which can greatly improve the fishing efficiency of pelagic fisheries, and also provide accurate and selective fishing f...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects in the prior art, the purpose of the present invention is to provide a multi-beam fishing sonar signal processing method and system, the system solves the problem by adding a matched filter link in each signal processing board and extracting the matched filter link. The problem of excessive signal rate between the signal processing board and the host in the prior art

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