The use of a magnetic flux leakage in the assessment of the technical state of a steel wire rope subjected to bending

Abstract

The technical state of steel wire ropes has a decisive impact on the safety of people using the equipment in which they are installed. The basis for increasing safety is the ability to assess the condition of the working steel wire. The article presents the use of magnetometric sensors to determine the relationship between the number of steel wire rope bends and its magnetic field induction value. This knowledge, referred to ropes working on real objects, allows to determine the state of stress prevailing in them as well as their condition. Keywords: non-destructive testing, magnetic flux leakage, steel wire rope, bending Streszczenie: Stan techniczny lin stalowych ma decydujący wpływ na bezpieczeństwo ludzi korzystających z urządzeń, w których są zainstalowane. Podstawą zwiększania bezpieczeństwa jest umiejętność oceny stanu kondycji pracującej liny stalowej. W artykule przedstawiono wykorzystanie czujników magnetometrycznych do określenia zależności pomiędzy liczbą przegięć liny stalowej a jej wartością indukcji pola magnetycznego. Wiedza ta, odniesiona do lin pracujących na obiektach rzeczywistych, pozwala określić panujący w nich stan naprężeń a także ich kondycję. Słowa kluczowe: badania nieniszczące, magnetyczne pole rozproszenia, lina stalowa, przeginanie

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Influence of the Size of Damage to the Steel Wire Rope on the Magnetic Signature

“…The essence of the conducted research is the measurement and interpretation of the local magnetic field disturbance caused by the occurrence of places of stress concentration in the material, local plastic deformation of the material, or the presence of material discontinuities, both mechanical (cracks, delamination) and structural (inclusions of other material). The measured value is the value of the selected magnetic field strength component measured near the object being diagnosed [ 11 , 12 , 13 , 14 ].…”

Detecting Discontinuities in Steel Wire Ropes of Personal Lifts Based on the Analysis of Their Residual Magnetic Field

“…This article aims to develop an algorithm for wire rope damage detection based on the features extracted from the magnetic induction components measured near the rope. The traditional magnetic method of wire rope testing is based on formatting the magnetic field from an external source and analyzing the magnetic flux leakage caused by discontinuities [20][21][22][23][24]. The method we propose uses residual magnetic fields (self-magnetic flux leakage), which result from the action of the magnetomechanical effects changing the electromagnetic properties of the material.…”