Method and system for detecting underwater ferromagnetic target based on multiple power frequency radiation sources

Abstract

The invention discloses a method and system for detecting an underwater ferromagnetic target based on multiple power frequency radiation sources, and belongs to the technical field of non-acoustic underwater detection. The underwater ferromagnetic target generates an electromagnetic field under the combined action of a power frequency electromagnetic field and seawater inside and outside the underwater ferromagnetic target, and if a plurality of water surface ships act on the underwater ferromagnetic target as secondary radiation sources, a secondary magnetic field generated by the underwater ferromagnetic target is obtained. Adding the electromagnetic field generated by the underwater ferromagnetic target under the combined action of the power frequency electromagnetic field and the seawater inside and outside the underwater ferromagnetic target to obtain a total electromagnetic field generated by the underwater ferromagnetic target; and acquiring power frequency electromagnetic field distribution around the underwater ferromagnetic target, and detecting the underwater ferromagnetic target according to the power frequency electromagnetic field distribution. According to the invention, the power frequency electromagnetic field signal of the underwater ferromagnetic target can be enhanced, and detection of the underwater ferromagnetic target is realized.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of non-acoustic underwater detection and multi-dimensional signal processing technology, and more specifically relates to a method and system for detecting underwater ferromagnetic targets based on multiple radiation sources. Background technique [0002] Under the new situation of economic globalization, global trade exchanges are extremely close. The total import and export volume of countries in the world, especially my country, has shown a relatively rapid growth rate. Shipping transportation is favored by global businessmen for its huge cargo volume and efficient cargo protection. favor. Therefore, the number of ships built by shipbuilding enterprises and the tonnage of ships are increasing year by year. The safety of ships during navigation has always been the focus of attention. [0003] Ferromagnetic objects such as shipwreck targets and war mines are widely studied in marine explo...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method and system for detecting underwater ferromagnetic targets based on multiple power frequency radiation sources, which solves the problem of high cost of the prior art and the misjudgment easily caused by seabed topography and background noise interference , unable to support the technical problems of long-distance and large-scale detection

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