Method and apparatus for detecting roundness deffects in a railway vehicle wheel
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Aug 28, 2003
app pub date -
Apr 22, 2003
filing date -
Jun 6, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A motion sensor (3) is associated with a wheel (1) of a railway vehicle for generating a signal (M) indicative of the motion of the wheel along a vertical axis (x). A rotation sensor (6) provides a signal (S) indicative of the rotational speed of the wheel (1). The motion (M) and rotational speed (S) signals are received by an electronic processing unit (E) which correlates these signals using the speed signal (S) to divide the vertical motion signal (M) in subsequent time portions or frames, each corresponding to a complete rotation of the wheel. A mean of the subsequent time portions of the motion signal stored over a period of time is calculated to identify actual or incipient roundness defects of the wheel.
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