A method and system for locating an underwater target sound source

Abstract

The invention discloses a method and system for locating an underwater target sound source. The method includes: taking the sound source signal collected by each sensor in the sensor group as the excitation source, using a time domain sampling method to determine the excitation source time domain sampling signal; sampling the excitation source time domain according to the correlation between the time domain sampling and the spatial position The signal is processed to obtain the directional sampling signal of the excitation source; the summation operation of all the directional sampling signals of the excitation source is performed to obtain the spatial energy function of the candidate sound source position; the spatial energy function is solved by the spatial grid method, and the candidate sound source is obtained. The spatial energy value of the position; compare the spatial energy values ​​of all candidate sound source positions in the candidate sound source position set, and determine the candidate sound source position corresponding to the maximum spatial energy value as the actual sound source position. With the method and system of the present invention, under the condition of low signal-to-noise ratio, less sensors and relatively narrow azimuth angle signals can be used to achieve high-precision positioning of the target sound source signal.

Description

technical field [0001] The invention relates to the technical field of sound source location, in particular to a method and system for underwater target sound source location. Background technique [0002] In recent years, with the development of submarine noise reduction technology, how to locate submarines and other underwater targets with high precision has become an urgent problem and has attracted widespread attention. At present, there are many methods for high-precision positioning of underwater targets, including target sound source positioning, but there are various defects. For example, the Steerable Response Power (SRP) positioning method is a common underwater target sound source positioning method in beamforming, but it has a very low spatial resolution; the SRP method using phase transformation can improve the spatial resolution of the target. A more effective and stable sound source localization method, but the introduction of phase transformation in SRP may ...

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Problems solved by technology

For example, the Steerable Response Power (SRP) positioning method is a common underwater target sound source positioning method in beamforming, but it has a very low spatial resolution; the SRP method using phase transformation can improve the spatial resolution of the target. A more effective and stable sound source localization method, but introducing phase transformations in SRP may amplify the noise power, resulting in many local extrema in the SRP space, negatively affecting source localization

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