Detection of metal disturbance

Electricity: measuring and testing – Conductor identification or location – Inaccessible

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342442, 342448, 342459, 336 5, 607122, G01R 1900, G01S 504, G01S 302, H01F 3012

Patent

active

061474800

ABSTRACT:
A method for tracking an object using energy fields, in the presence of interference due to introduction of an article responsive to the fields, in the vicinity of the object. One or more desired energy fields are produced in the vicinity of the object, and a characteristic of energy fields induced due to introduction of the article is determined. Signals are generated responsive to the energy fields at a plurality of locations of the object after introduction of the article. Spatial coordinates of the object are determined, responsive to the generated signals and the determined characteristic.

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