Electricity: measuring and testing – Of geophysical surface or subsurface in situ – By magnetic means
Patent
1995-06-05
2000-02-29
Snow, Walter E.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
By magnetic means
324247, 324226, G01V 308, G01V 340, G01R 3302
Patent
active
060313773
ABSTRACT:
A magnetic anomaly detection buoy includes an elongated body having a cavity disposed therein, a means for detecting a magnetic anomaly and producing an output in response thereto, and a means for maintaining the elongated body in a state of buoyant repose within a fluid medium. A radio transmitter, disposed within the cavity of the elongated body, for electrical communication with the detecting means. The radio transmitter receives the output from the means for detecting the magnetic anomaly and transmits a radio signal in response thereto. A method for detecting a magnetic field anomaly includes deploying a magnetic anomaly detection buoy into a large body of water and determining a first flux value representing the magnetic flux of the environmental magnetic field conditions. The first flux value is then stored for future reference. The environmental magnetic field conditions are evaluated and a second flux value is determined. If the second flux value is greater than the first flux value, information is transmitted via radio waves.
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John Clarke, Geophysical Applications of Squids, IEEE Transactions on Magnetics, vol. Mag-19, No. 3, May 1983.
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