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Wheel load cycle tag for rail : final report.
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2015-12-01
[PDF-3.01 MB]
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Edition:Final report
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Abstract:The Federal Railroad Administration (FRA) has determined that there is a research need to collect and analyze statistical usage
data to help ascertain the cumulative load-induced fatigue on rail track segments. The estimation of rail segment burdening
through the determination of loaded or unloaded wheel passages is aided by obtaining totalized statistical counts that can serve as
an early indication of potential track failures. This research focused on designing and extensively testing a small, self-powered
track assessment gauge (TAG) device that was installed directly to the web of the track rail. This device was designed to tabulate
train wheel passages and associate an “empty” or “loaded” status with passage of rolling trains. The measured statistical data was
stored internally to the device and was field accessible for recovery via a non-contact hand-held unit. Additional testing is needed
to confirm the actual power consumption during operation and sleep modes, and verify the operation and accuracy of the TAG
unit in varied track/roadbed conditions.
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