Method and system for detecting ferromagnetic particles embedded non-ferromagnetic materials by variation of the magnetic field.

摘要

Method and system for detecting ferromagnetic particles embedded non-ferromagnetic materials by variation of the magnetic field, comprising four magnets (1) arranged in a grid whose ends, extended outward from the grid, contain magnetic poles of the same sign; a plurality of coils (2), positioned such that the maximum magnetic field (3) created the crosses perpendicularly to the plane of its coils, responsible for detecting if voltage signals are induced due to magnetic field variations (3) and processing means connected to the coils (2) configured to filter signals recorded voltage, amplifying the filtered signals and storing the processed signals.