Self-calibrating hot wheel detector for railroads
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United States of America Patent
Stats
-
Mar 31, 1992
Grant Date -
N/A
app pub date -
Dec 12, 1990
filing date -
Dec 12, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a device for monitoring the temperature of the wheels of passing railroad cars. More particularly, this device includes a self-calibration function wherein a predetermined heat source is attached to the device, a fixed amplifier amplifies the resulting electric signal so as to generate a signal comparable in magnitude to that generated by a passing train, a variable gain amplifier further amplifies the signal, and the resulting signal is converted to a digital signal. The digital signal is used as a signal to the feedback input of a variable gain amplifier. In response to the digital signal, the variable gain amplifier adjusts its gain until the feedback signal reaches a predetermined value.
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Cited Art Landscape
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