Self-damage diagnostic examination apparatus and self-damage diagnostic examination method

摘要

There is provided a cable damage diagnosing inspection apparatus having a yoke which applies a magnetic field for setting a wire to a magnetically saturated state, an AC magnetic field applying device which supplies an AC magnetic field to the cable in one by supplying a constant current to an axial coil axial direction thereof to cause the generation of an eddy current and an eddy current magnetic field inside the rope, and a control device which, during the application of the AC magnetic field to the rope which is put into the magnetically saturated state by the first yoke, detects a presence / absence of a break in the rope based on a measurement result of a magnitude of magnetic flux leakage from the cable, calculates a cross-sectional area of the cable based on a measurement result of the voltage fluctuating due to the eddy current magnetic field generated in the axial direction of the cable, and shape abnormalities in the cable Rope anha and the presence / absence of a fracture and the cross-sectional area investigated.