Process and device for the continuous nondestructive control of rails on a railway line by ultrasonics
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United States of America Patent
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Nov 12, 1996
Issued Date -
N/A
app pub date -
Jun 2, 1995
filing date -
Dec 23, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A continuous nondestructive process for controlling the rails on a railway line by ultrasounds is carried out by the emission of ultrasounds at successively different points along the rail which are spaced apart by a measured value. For each echo, the acoustic distance between the point of emission and the point of reflection of the beam of ultrasounds is determined, and then a bidirectional map of the echoes is established by correlation. Finally, this echo map is compared to a mask having a window, of which the shape, the orientation and the dimensions are determined by the characteristic features of the rail to be examined and by the type of defect looked for, only those echoes which appear in this window being then taken into consideration.
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