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