Hot rail wheel bearing detection system and method

Details Hot rail wheel bearing detection system and method Hot rail wheel bearing detection system and method

2008-05-16

2010-12-07

Le, Mark T (Department: 3617)

Railway switches and signals

Cab signal or train control

Train defect

Reexamination Certificate

active

07845596

ABSTRACT:
A system for detecting a hot surface is provided. The system includes a sensor for sensing an infrared radiation radiating from the hot surface and a high pass filter to eliminate low frequency components from the sensor signal. The system also includes an absolute value module to compute absolute values of a filtered signal, a first comparator to compare output of the absolute value module to a first threshold and a peak detector to report a peak value of the sensor signal's output. The system further includes a second comparator to compare output of peak detector to a second threshold.

REFERENCES:
patent: 2003/0102965 (2003-06-01), Hemed
patent: 2006/0131464 (2006-06-01), Hesser et al.

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