The report represents the results of the researches in the field of ultrasound propagation in rails and gives the characteristics of the device for rails flaw detection. This device allows detecting the perpendicular cracks in rails, the square of which exceeds 10 % from the section square of rails head, web or base. As a sender and receiver of ultrasound the device uses the line array of probes with dry point contact (DPC). The distance for detecting the butt-end of the rail achieves 50 m from the place, where the array contacts the rail. The researchers came to the following conclusions: For rail testing with guided wave echo-method it is perspective to use the linear antenna array of low-frequency short pulses ultrasonic probes with DPC. This antenna array has a good possibility of electronic adaptation to the parameters of wave propagation in different parts of rails and other long testing objects. The operation signal frequencies for testing rails head, web and base and their propagation velocities are different and before testing of a specific rail part it is necessary to choose the corresponding adjustment configuration. The developed flaw detector provides the efficient search of defects in rails without scanning them with the 10 cm exactness of defect localization.
Non-destructive testing of rails in case of guided waves use
Zerstörungsfreie Schieneprüfung im Falle geführter Wellen
2004
6 Seiten, 5 Bilder, 4 Quellen
(Nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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