Inversion of the Equivalent Electric Dipole Moment of Ship’s Corrosion-Related Static Electric Field in Frequency Domain

Abstract

When evaluating the ship’s underwater electric field stealth, the underwater electric potential or the underwater electric field is often used, but it is easily affected by the environment conditions. As a result, the evaluating accuracy is not high. To solve this problem, the equivalent electric dipole moment is used as the evaluating factor in this paper. Firstly, the method of inverting the equivalent electric dipole moment in the frequency domain is proposed. However, the limited measuring range will also lead to some errors based on the proposed method. As a result, we improve the proposed method by applying an integral correction which uses a standard dipole source. To test the effectiveness of this method, a simulation experiment is carried out, and the results show that the method has high inversion accuracy even in a low signal-to-noise ratio (SNR) environment. This method has provided a new technological approach for evaluating the ship’s corrosion-related static electric field.

Characteristics of Electric Field Induced by Oscillating Metal Underwater Vehicle

“…As an important source of target exposure, ship electric fields have the advantages of being unable to be completely eliminated, strong anti-interference ability, and obvious line spectrum characteristics. They are often used for underwater target detection and underwater weapon fuses [1][2][3][4][5]. With the escalating conflict of international maritime rights and the progress of countries around the world in ship noise reduction and demagnetization, the detection of electric fields in water targets has attracted much attention.…”

Analysis of Characteristics of the Electric Field Induced by an Angularly Rotating and Oscillating Magnetic Object

“…The static electric field signal generated by corrosion and anti-corrosion currents is easy to track and locate due to its obvious near-field characteristics and high signal-to-noise ratio. Therefore, it is often used for end positioning of positioning systems, mine electric field fuses, and underwater array detection [1][2][3][4][5]. In recent years, attention has been widely paid to electric field detection.…”