Target passive positioning method based on deep sea distributed vertical line array

Abstract

The invention provides a target passive positioning method based on a deep sea distributed vertical line array, and the method comprises the steps: 1), collecting sound pressure signals of target sound source radiation at a t moment for three or more synchronous vertical line arrays at the same time; 2) carrying out azimuth spectrum estimation on each sound pressure signal to obtain an estimated value of an angle of arrival of each detection node; 3) calculating a corresponding arrival angle template value by using the sound field model; 4) matching the estimated value of the angle of arrival with a corresponding template value to obtain a distance estimated value between the target sound source and each detection node; step 5) based on the search range and the search grid interval, obtaining distance information between each grid point and each detection node; and 6) matching the distance information with the distance estimation value to obtain the position information of the target sound source. According to the method provided by the invention, the real-time estimation of the position information of the target sound source is realized by adding system configuration and utilizing the distance information of the three or more detection nodes.

Description

technical field [0001] The invention relates to the technical fields of underwater acoustic engineering, marine engineering and sonar, in particular to a target passive positioning method based on deep-sea distributed vertical line arrays, which can be used for real-time positioning of deep-sea targets. Background technique [0002] Passive localization of sound sources and targets is one of the hot and difficult issues in deep sea acoustics research. In the deep sea environment, there is an obvious multi-path arrival structure in the received signal, and the sound source distance can be estimated by using a scalar vertical line array or a single vector hydrophone combined with a multi-path arrival angle. The article "A sound source localization method in deep-sea direct wave area near water surface based on large-depth vector hydrophone" uses the vector hydrophone to obtain the azimuth and angle of arrival of the target, and realizes the positioning of the target on the two...

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Problems solved by technology

[0004] In order to avoid the deficiencies of the prior art, the present invention proposes a target passive positioning method based on a deep-sea distributed vertical line array to solve the problem that the existing deep-sea environment sound source positioning method can only give the distance between the target and the detection node information, but cannot give the specific location information of the target

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