Using a rail-inspection train, the Deutsche Bahn's system of railroads iscontinuously checked for traffic-induced defects. Until now, only ultrasonicinspection was used. In addition, eddy-current inspection could successfully andefficiently be used to detect and evaluate certain surface cracks - so-called headchecks. There have already been reports about laboratory tests which proved thegeneral suitability of this test method [1,2]. The next step - described here -consisted of practical trials under real-life conditions. A test system which isable to fulfil the strict requirements (test speeds of up to 100 km/h, complexprobe guidance, suppression of electrical and mechanical interference, recording ofdata, filtering and evaluation of data) was developed. As part of the railinspectiontrain and as a manual system, this inspection system was successfullytested on the Deutsche Bahn's system of railroads under real-life conditions.
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