Large-plane iteration method for upward depth conversion of underwater static electric field of deep-sea ship

Abstract

The invention discloses a large-plane iteration method for upward depth conversion of an underwater static electric field of a deep-sea ship. The electric field distribution of a target plane is acquired by the iteration method according to the scalar potential distribution of a measurement plane. According to the invention, a method suitable for upward depth conversion of an underwater static electric field of a ship in a deep-sea environment is designed by combining a large-plane depth conversion method and the iteration idea. Upward depth conversion of an underwater static electric field of a ship in a deep-sea environment can be realized. Moreover, the algorithm is simple, the stability is high, the conversion accuracy is high, and the conversion range is large.

Description

technical field [0001] The invention belongs to the field of feature prediction of underwater electromagnetic fields of ships, and in particular relates to a depth conversion method for underwater static electric fields of ships, which is suitable for a method for upward depth conversion of static electric fields in deep sea environments. Background technique [0002] When a ship sails in the ocean, due to corrosion and anti-corrosion measures, a static electric field will be generated around it. Research shows that the field has obvious distribution characteristics and has considerable application potential in target detection, positioning, and strike. Due to the special environment and the limitation of technical conditions, the actual measurement of the field can only be carried out in a limited area of ​​a certain depth. The measured values ​​infer the field distribution at other depths. like figure 1 As shown, from the perspective of practical application, there are t...

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Problems solved by technology

The depth conversion method based on the electrical simulation body can be used to solve the above two types of conversion problems, but the conversion process needs to complete complex source parameter inversion, which has poor stability, needs to provide accurate marine environmental parameters, and is in the process of moving from far to near Defects such as rapid decline in accuracy during conversion

The depth conversion method based on the Lagrangian equation, also known as the large-plane conversion method, has a small amount of calculation, high stability, and does not require environmental parameters, but it is only suitable for conversion from near to far, and cannot be used for upward conversion.

The depth conversion method based on differential recursion can be used for upward and downward depth conversion, and the calculation amount is small and the calculation speed is fast. However, due to the accumulation of differential errors, the conversion distance is very limited and the stability is poor

That is to say, there is no good solution to the problem of upward conversion of the underwater static electric field of ships in the deep sea.

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