Результати розроблення та дослідження інформаційно-діагностичної системи для магнітодинамічної дефектоскопії рейок

Abstract

Наведено результати розроблення та дослідження макета інформаційно-діагностичної системи для магнітодинамічної дефектоскопії залізничних рейок на основі сенсорів Холла. Застосування восьмиканального давача, окрім виявлення факту наявності дефекту, або структурного елемента колії дає змогу локалізувати його в поперечному перерізі головки рейки відносно її робочої або неробочої сторін, що підвищує інформативність всієї системи.The results of the development and field tests of the information-diagnostic system model based on Hall sensors for the magnetic flux leakage defectoscopy of railway rails are presented. Unlike existing systems of the magnetic flux leakage defectoscopy using singlechannel induction sensors, a specially designed eight-channel search sensor on Hall sensors is used. Defectoscopic information from an eight-channel search sensor is transmitted for processing and storing on a personal computer by network cable using Ethernet technology. The experimental tests were carried out both in the conditions of the laboratory on the simulator of the rail and in the course of inspection of the railway track on the carriagedefectoscope. In research on the carriage-defectoscope, the search ski with the eight-channel sensor was installed in place of the regular induction sensor of the carriage-defectoscope near the rear, in the course of the carriage's movement, the pole of the electromagnetic magnetizing system. The adequacy of defectoscopic information recording is carried out on the example of the analysis of signals from regular track elements – bolt rail joints, signals from which are commonly known. As result of the received signals processing is set, that using of an eightchannel sensor compatible with the information-diagnostic system in addition to detecting the fact of a defect or structural elements of a track, allows their to be localized in the cross-section of the rail head with respect to its working or non-working sides. It is shown the possibility to distinguish signals from structural elements of a track, which are heterogeneous in the transverse, relative to the axis of the rail, direction. The obtained using an eight-channel search sensor defectoscopic information makes it possible to visualize the investigated section of the rail by forming images, the brightness of which is proportional to the magnitude of the magnetic field of scattering of this section, which increases the information content of the system as a whole and may be useful in determining the degree of risk of a defect detected.