Non-Destructive Testing of Steel Wire Rope Using Magnetic Flux Leakage: Principle, Sensor Design and Signal Wavelet Analysis
Special Issues Editor (Nottingham Tent University, United Kingdom (Great Britain))
As a kind of flexibility bearing component, steel wire ropes are applied widely. However, after being used for a period, some flaws may be produced in the steel wire rope. In order to ensure the safe operation of steel wire ropes, non-destructive testing methods are being applied to inspect steel wire ropes. In this paper, an intelligent non-destructive testing equipment, consisting of the sensing detectors and signal analysis computer system, has been designed and constructed. Any geometrical discontinuity in magnetic permeability in the magnetized steel wire rope will cause the magnetic field to leak out of the rope. The flux leakage fields which conceive information on anomalies, such as broken wires, abrasion, corrosions, are measured by Hall sensor array. However, these signals contain a lot of noises which make the flaws difficult to analyse. In this paper, the implementation of a wavelet transform has been used to characterize and analyse signals of the wire rope flaws obtained from the non-destructive testing equipment. Related experiments are performed based on the equipment. Repeatability, resolution and sensitivity of the signals are also assessed to show the performances of the instrument.
Journal: International Journal of Simulation: Systems, Science & Technology, IJSSST V17
Published: Jul 14, 2016