zastosowania elektromagnetyzmu w nowoczesnych ... - PTZE

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XVIII Sympozjum PTZE, Zamość 2008
The ACFM method [4] has been mainly elaborated by British company TSC Inspection
Systems [5]. In this method special probe induces electrical current into the inspected material
that, in its turn, creates the magnetic field, which homogeneity is distorted in the areas near
defects. Micro sensors in the mentioned probe give possibility to detect such defects. For
example, information about the crack length can be obtained using the vertical component of
the measured magnetic field and information about the crack depth – by horizontal one.
Special algorithms have been elaborated to obtain such information from the sensors signals.
All these methods are developed by the authors of the report. Besides the mentioned
methods, application of automatic locomotive signalling currents [6, 7] or alternating lowfrequency
currents, induced into the rail by the special inductors, has been proposed in the
Physico-Mechanical Institute of the National Academy of Sciences of Ukraine for track rail
diagnostics.
The obtained signals from the sensors must be processed to extract the needed
information about damages. Such methods as, for example, method of the periodically
correlated stochastic signals [8, 9], Fourier and wavelet transformation [10] can be applied.
Peculiarities of using such methods are discussed in the report.
In the report some results of investigations devoted to creating methods and facilities for
technical diagnostics of rails are presented. The elaborated information-measuring systems,
calculation devices and receiving sensors are described.
References
1. www.energodiagnostyka.ru
2. Lesiak P. Diagnostyka uszkodzeń szyn kolejovych y wykorzystaniem metody magnetyczniej pamięci
metalu, Politechnika Radomska, Instytut automatyki i telematyki transportu, Radom, 2006. – 21 s.
3. Неразрушающий контроль рельсов при их эксплуатации и ремонте / А.К.Гурвич, Б.П.Довнар,
В.Б.Козлов и др. Под ред. канд. техн. наук А. К. Гурвича. – Москва: Транспорт, 1983. – 318 с.
4. http://www.iic-hq.co.jp
5. http://www.tcsinspectionsystems.com
6. Nichoga V., Dub P. On a Possibility of Electromagnetic Diagnostics of Rail Joints by Usage of Automatic
Locomotive Signalling Currents // Proceedings of International Conference on Modern Problems of
Telecommunications, Computer Science and Engineers Training (TCSET'2000), pp. 179-180, Lviv-
Slavsko, Ukraine, February 14-19, 2000.
7. Нічога В.О., Дуб П.Б. Аналіз можливості виявлення поверхневого дефекту рейки за аномалією
магнітного поля струму // Відбір і обробка інформації. – 2005, Вип.22(98). – С. 11-16.
8. Ісаєв І.Ю., Нічога В.О., Трохим Г.Р., Яворський І.М. Використання методів теорії періодично
корельованих процесів для виявлення дефектів залізничної колії на ранній стадії їх зародження
//Інфоромаційно-керуючі системи на залізничному транспорті, №4,5 (37) 2002.-С.110-113.
9. I. Javorskij, I. Isayev, V. Nichoga, G. Trokhym, E. Grudziński Statistical Analysis of Rail Electromagnetic
Testing Signals // Diagnostyka, Poland. – Vol. 30, Tom.1. 2004. – P. 217-220.
10. Hamid A. Toliyat, Karim Abbaszadeh, Mina M. Rahimian, Leslie E. Olson Rail Defect Diagnosis Using
Wavelet Packet Decomposition, IEEE Transaction on Industry Applications, Vol. 39, No 5,
September/October 2003.