Patent ID: 6541965
Filing Date: 2003-04-01
Classification: G01V

Abstract:
An inductive sensor arrangement for detecting a ferrous object buried in a stationary surrounding medium comprising a field coil pair for generating a medium penetrating alternating magnetic flux field and a sense coil pair for sensing magnetic flux field disturbances caused by said ferrous object, said sensor arrangement being devised to be swept over the surface of a medium,said two field coils of said field coil pair being adjacently positioned at a predefined distance from each other and having non-overlapping winding planes arranged in the same geometric plane, and said pair of sense coils being respectively mounted essentially completely inside each of said field coils and being in an orientation to an axis of each of said field coils such that essentially no voltage is induced in said sense coils in an environment free of one of a ferrous object and a material.