Dynamic rail longitudinal stress measuring system
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United States of America Patent
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-
Feb 7, 1995
Issued Date -
N/A
app pub date -
Mar 3, 1993
filing date -
Jun 2, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method for dynamically and non-destructively measuring the longitudinal stresses in a rail of a continuous rail track includes an ultrasonic transmitter which transmits a signature coded pulse pattern through a rail which pulse pattern is altered by the rail section dependent upon the longitudinal stress within the rail. The altered pulse pattern is then received and a data processor, in conjunction with a rail height detector, a rail temperature detector, and a rail splice detector, dynamically determines the longitudinal stresses in the rail as a function of the received pulse characteristics and calculates the stress free temperature (SFT) of the rail. A rail marker marks portions of the rail having unacceptable SFT values. Stress and related rail data are recorded on a data log. A position sensor provides milepost positions to three decimal places.
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