Non destructive evaluation procedures dedicated to the rail inspection were operated when tests were effected on board a subway train. The difficult in-operating conditions lead to the design of a specific double-coils and double frequencies sensor that delivers 8 complementary signals. The detection problem of minor defects may be effected thanks to two approaches; one heuristic method that defines decision borders in signal space and another one based on wavelet projections with a data fusion approach. The methods are validated statistically on a labelled defects data set with the help of COR curves.
Chaine d'instrumentation embarquee pour la detection temps reel de defauts de rail debouchants
Embedded instrumentation for real time detecting rail traversing defects
2001
5 Seiten, 6 Bilder, 10 Quellen
Article (Journal)
French
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