АMETHOD AND APPARATUS FOR MONITORING A WALL OF A MECHANICAL STRUCTURE

摘要

An apparatus (1) adapted to monitor a wall (2) of a mechanical structure, said apparatus (1) comprising: an excitation unit (4) adapted to apply a magnetic excitation field to at least one magneto-elastic element (3) of said monitored wall (2), said magneto-elastic element (3) having a magnetic permeability sensitive to a change of mechanical stress in said wall; a recording unit (5) adapted to record a response signal generated by said at least one magneto-elastic element (3) in response to the applied magnetic excitation field; and a processing unit (6), adapted to evaluate the recorded response signal to detect a mechanical stress in said monitored wall (2).