Rope damage diagnosis test equipment and rope damage diagnosis test method

摘要

A first yoke for applying a magnetic field to the rope so as to bring the rope into a magnetic saturation state and a second yoke for applying an alternating magnetic field to the axial direction of the rope by supplying a constant current to the axial coils to generate an eddy current and an eddy current magnetic field in the rope The AC magnetic field is applied to the rope magnetically saturated by the first yoke and the presence or absence of breakage of the rope is detected from the measurement result of the magnitude of the leakage magnetic flux of the rope and the eddy current And a controller for calculating the cross-sectional area of the rope from the measurement result of the voltage fluctuated by the magnetic field and inspecting the shape of the rope for the presence or absence of fracture and the cross-sectional area.