Locating stationary magnetic objects

Details Locating stationary magnetic objects Locating stationary magnetic objects

2007-09-10

2010-02-02

Patidar, Jay M (Department: 2858)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

C324S243000, C324S260000, C702S150000

Reexamination Certificate

active

07656159

ABSTRACT:
A technique for locating stationary magnetic objects comprises placing magnetic sensors on a movable platform; for each sensor, measuring a total magnetic field signal in an area of detection; using the sensors to identify a line upon which a target stationary magnetic object is located; and fixing a location of the object by moving the platform in substantially straight lines until the object is detected by at least two of the sensors; using the measured signals to determine a first path on which the object lies; positioning the sensors so that a line connecting two of the sensors intersects the first path on which the object lies; moving the platform along a second path substantially parallel to the first path; recording two positions at which at least two of the sensors detect a maximum total magnetic field signal from the object; and identifying a third path through the two positions.

REFERENCES:
patent: 5134369 (1992-07-01), Lo et al.
patent: 6675123 (2004-01-01), Edelstein
patent: 2003/0011359 (2003-01-01), Ashe
patent: 2003/0011370 (2003-01-01), Mercer

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