Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location
Patent
1995-09-01
1997-07-22
O'Shea, Sandra L.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
For small object detection or location
G01V 311
Patent
active
056507259
ABSTRACT:
A magnetic imager 10 includes a generator 18 for practicing a method of applying a background magnetic field over a concealed object, with the object being effective to locally perturb the background field. The imager 10 also includes a sensor 20 for measuring perturbations of the background field to detect the object. In one embodiment, the background field is applied quasi-statically. And, the magnitude or rate of change of the perturbations may be measured for determining location, size, and/or condition of the object.
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Danby Gordon
Powell James
Reich Morris
Associated Universities Inc.
Bogosian M. C.
O'Shea Sandra L.
Phillips Roger
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