@ARTICLE{Wołoszyn_Mirosław_Ship’s_2019, author={Wołoszyn, Mirosław and Jankowski, Piotr}, volume={vol. 26}, number={No 3}, journal={Metrology and Measurement Systems}, pages={569-579}, howpublished={online}, year={2019}, publisher={Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation}, abstract={A ship built from ferromagnetic steel disturbs the uniformity of the Earth’s magnetic field. Changes of ship’s signature are due to the magneto-mechanical interaction of the hull with the Earth’s magnetic field. The ship’s magnetic field can be detected by a magnetic naval mine. For this reason, the vessel has to be demagnetized. There are several methods of ship’s de-perming. The results of experimental and computer simulations of the ship’s de-perming process using coils lying on the seabed are presented in this paper. The simulation of the de-perming process with a hysteresis model of ship’s steel was carried out in Opera-3d 18R2. The laboratory experiments were carried out using a physical ship’s model, several Helmholtz coils, magneto-resistive sensors, etc. The experiments and computer simulations have shown that ship’s de-perming with coils lying on the seabed is possible. The values of coil currents are over dozen times greater than those used in the standard method.}, type={Article}, title={Ship’s de-perming process using coils lying on seabed}, URL={http://www.journals.pan.pl/Content/113101/PDF/11_MMS_3_INTERNET.pdf}, doi={10.24425/mms.2019.129582}, keywords={magnetic field, ship, de-perming, energy de-perming}, }