Determining the depth of a rail defect from the signals of the electromagnetic flaw detector

In scientific work, to determine the defects of rail strings, results experimental research and calculations depth penetration an electromagnetic wave into cavity a string, transient processes in solenoid demagnetizing device with direct alternating currents various shapes are presenting. It has been established that use impulse influences will be optimal for demagnetization, since large number maxima minima obtained, both negative positive regions a, decrease current is equivalent saturation steel core, energy savings, therefore, leads demagnetization lashes. The experimentally obtained improved magnetization system, static dynamic modes operation, presented. proposed wagon-type flaw detector, which relatively small dimensions allows high accuracy detect rails. following errors were found when comparing measurements real theoretical mathematical modeling. test distance between rails coils was determined, modeling; as result, absolute error very insignificant, order 0.1mm.