Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1993-09-01
1995-10-31
Pellinen, A. D.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
114240R, B63G 906, H01F 1300
Patent
active
054635233
ABSTRACT:
A system and method are provided for degaussing a vessel moving over an urwater 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.
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Holmes John J.
Lackey Milton H.
Fleming Fritz M.
Pellinen A. D.
Shuster Jacob
The United States of America as represented by the Secretary of
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