Electricity: measuring and testing – Of geophysical surface or subsurface in situ – By magnetic means
Patent
1987-09-08
1988-08-23
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
By magnetic means
G01V 3165
Patent
active
047663855
ABSTRACT:
A magnetometer system carried aboard a tethered underwater vehicle for confirming the existence of a buried naval mine which then may be neutralized by an explosive charge dropped by the vehicle. The vehicle carries two or more scaler magnetometers and is operated to obtain vertical and two orthogonal horizontal spatial gradients of the magnetic field above the mine location. The vertical distance to the mine is obtained, and this information, along with the known dip angle of the earth's magnetic field at the location, is utilized in conjunction with the spatial gradients for obtaining three mutually orthogonal components of the magnetic moment of the mine, from which the magnitude of the magnetic moment may be calculated. If the magnitude falls between upper and lower predetermined limits, a positive mine classification signal is provided.
REFERENCES:
patent: 3263161 (1966-07-01), Ruddock et al.
patent: 3324385 (1967-06-01), Hings
patent: 3412371 (1968-11-01), Shostak
patent: 3946696 (1976-03-01), Lubnow
patent: 4021725 (1977-05-01), Kirkland
patent: 4427943 (1984-01-01), Cloutier et al.
Edmonds Warren S.
Eisenzopf Reinhard J.
Schron D.
Westinghouse Electric Corp.
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