Modeling and Measurements of Alternating Magnetic Signatures of Ships

Sensors & Transducers

Bin Li¹  Zhiqiang Wu²  Xinhua Zhu² 

[1] School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an, 710072, China;School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China ;

关键词: Electromagnetic signatures;    Alternating magnetic field (AM);    Horizontal electric dipole (HED);    Fluxgate magnetometer;    Swaying platform.;   

DOI  :  

来源: DOAJ

【 摘 要 】

The alternating electric and magnetic fields are new contributors to the global electromagnetic silencing of ships. Thus, modeling and measurements of alternating magnetic signatures should be a research priority in maritime engineering. In this paper, an alternating horizontal electric dipole is adopted to model the electromagnetic fields related with corrosion. Formulas for alternating magnetic fields generated in shallow sea by horizontal electric dipole are derived based on an air-sea-seabed three-layered model and a numerical computer is also applied. In addition, the alternating magnetic fields of a ship are measured using a tri-axis fluxgate magnetometer fixed in a swaying platform. The characteristics of these fields are analyzed. Finally, the equivalent dipole moment of the trial ship is predicted by contrasting the model results and the observed data.

【 授权许可】

Unknown