Patent ID: 9726639
Date: 2017-08-08
CPC Classifications: G01K,G01N,G01P

Claim:
1. An apparatus for detecting magnetic flux leakage in a metal object, comprising: a plurality of magnets operatively connected to a portion of the apparatus such that the plurality of magnets create a magnetic field when the plurality of magnets are positioned so as to magnetize the metal object; a plurality of coils positioned between the plurality of magnets wherein the plurality of coils provides a signal for measuring changes in the magnetic field strength; and at least one sensor positioned between the plurality of magnets and operatively connected to at least one of the plurality of coils wherein the at least one sensor measure the absolute strength of the magnetic field so that the signal from the plurality of coils and the signal from the at least one sensor generate a magnetic flux leakage output signal which represents the amount of metal loss in the metal object.