Accession Number : ADD017930
Title : Zero Field Degaussing System and Method.
Descriptive Note : Patent, Filed 1 Sep 93, patented 31 Oct 95,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Holmes, John J ; Lackey, Milton H
Report Date : 31 Oct 1995
Pagination or Media Count : 28
Abstract : A system and method are provided for degaussing a vessel moving over an underwater magnetic detector. A location at the vessel residing over the magnetic detector is continuously provided to a controller. The vessel is equipped with a plurality of degaussing coils such that each is independently controllable. Degaussing coil currents are determined by the controller according to a least squares minimization routine such that an off-board magnetic field of the vessel at the location over the magnetic detector is absolute zero. In addition the determined coil currents minimize the off-board magnetic field of the vessel at all other locations. The determined coil currents are then applied to the appropriate degaussing coils via separate power supplies.
Descriptors : *NAVAL VESSELS, *PATENTS, *DEGAUSSING, POSITION(LOCATION), COILS, MAGNETIC FIELDS, VULNERABILITY, REDUCTION, LEAST SQUARES METHOD, POWER SUPPLIES, MAGNETIC DETECTORS, CURRENTS, UNDERWATER, UNDERWATER TRACKING, MAGNETIC MINES
Subject Categories : Marine Engineering
Magnetic & Electric Fld Detection & Detectors
Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE