MAGNETIC FLAW DETECTOR FOR WIRE ROPE Russian patent published in 2013 - IPC G01N27/82 

FIELD: physics.

SUBSTANCE: rope 2 moves in a channel 1. A magnetising unit 3 generates magnetic flux partially closed on a section of the rope 2. Local magnetic scattering fields from defects of the rope 2 are converted by a unit 6 of magnetically sensitive measuring elements to electric signals. The same magnetic scattering fields from defects as well as from structural and geometric irregularities of the rope are detected successively over time by magnetically sensitive elements 8 and 9 and are converted to electric signals that are identical on shape and value on outputs of said elements. Control pulses are simultaneously transmitted with given frequency from a pulse generator 14 to control inputs of units 7, 11 and 12. At the moment of arrival of said pulses, instantaneous values of signals from the unit of magnetically sensitive measuring elements 6 are recorded in the memory of a signal processing unit 7, and from the magnetically sensitive elements 8 and 9 in the memory of units 11 and 12 for recording magnetograms. A defectogram of the rope is formed in unit 7 as a result and magnetograms M1 and M2 are formed in units 11 and 12. Magnetrograms M1 and M2 are jointly processed in a magnetogram processing unit 13, enabling to mark the coordinate for the defectogram obtained during the inspection process in units of length.

EFFECT: high accuracy of determining coordinates of defects.

3 dwg