Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location
Patent
1995-12-15
1997-11-04
Snow, Walter E.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
For small object detection or location
324 67, G01V 308, G01V 310, G01B 1900
Patent
active
056844034
ABSTRACT:
An antenna array has three horizontal coils (A,B,C) with equal spacings s, and two coplanar vertical coils (D,E) with a horizontal spacing 2f. When it is located over one or more current-bearing buried conductors, signal currents (A,B,C,D,E) are induced in the coils. The difference value D-E is measured and compared with a value "D-E" calculated from the equations:
REFERENCES:
patent: 5001430 (1991-03-01), Peterman et al.
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