Early warning equipment and method for detecting small target sonar

Abstract

The invention discloses early warning equipment used for detecting a small target sonar. The early warning equipment comprises a transducer array used for receiving an underwater acoustic signal and converting the underwater acoustic signal into an electric signal; a receiving and conditioning module used for conditioning the electric signal and converting the conditioned signal into a digital signal; a signal processing module which performs broadband beam forming processing on the digital signal to obtain a broadband beam forming result of a pre-formed orientation; an early warning module which performs early warning processing on the broadband beam forming result. When the broadband beam forming result of a certain frequency band and a certain preformed orientation exceeds a preset energy threshold according to a specific time rule, that a small target sonar exists in the preformed orientation is determined, and early warning prompt is sent out. The invention further discloses an early warning method for detecting the small target sonar. The method is used for detecting whether the small target sonar exists along the coast or not, and therefore a frogman prevents the coverage area of the small target sonar as much as possible during diving and is prevented from being found.

Description

technical field [0001] The invention belongs to the technical field of underwater communication, and in particular relates to an early warning device and method for detecting small target sonar. Background technique [0002] Small target sonar is generally used to detect small equipment such as frogmen\UUV (Unmanned underwater vehicle), and is deployed along the coast. [0003] In the existing technology, there are many small target sonars used to detect small equipment such as frogmen\UUV. When a frogman dives into seawater, it may enter the coverage of small target sonars, and thus be mistaken for small target sonars. However, there is still a gap in the prior art for early warning equipment for detecting small target sonar along the coast, so there is an urgent need for a kind of early warning equipment and method for detecting small target sonar to avoid small target sonar Found the frogman. Contents of the invention [0004] Embodiments of the present invention prov...

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Problems solved by technology

[0003] In the existing technology, there are many small target sonars used to detect small equipment such as frogmen\UUV. When a frogman dives into seawater, it may enter the coverage of small target sonars, and thus be mistaken for small target sonars. However, there is still a gap in the prior art for early warning equipment for detecting small target sonar along the coast, so there is an urgent need for a kind of early warning equipment and method for detecting small target sonar to avoid small target sonar found frogman

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