Method and apparatus for detecting hot rail car surfaces

Details Method and apparatus for detecting hot rail car surfaces Method and apparatus for detecting hot rail car surfaces

2005-06-28

2005-06-28

Swarthout, Brent A. (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C246S16900S, C246S16900S, C340S449000, C340S584000, C701S019000

Reexamination Certificate

active

06911914

ABSTRACT:
In one embodiment of the present invention, an apparatus for detecting a hot rail car surface comprises: an infrared sensor for acquiring an infrared signal from a rail car surface of a rail car and transducing the infrared signal into an electrical signal; a rank filter for filtering the electrical signal to produce a filtered array; a first peak detector for detecting a maximum filtered value of the filtered array; and a first comparator for comparing the maximum filtered value to a detection threshold to produce a filtered alarm signal.

REFERENCES:
patent: 3731087 (1973-05-01), King
patent: 4313583 (1982-02-01), Bambara et al.
patent: 5201483 (1993-04-01), Sutnar et al.
patent: 5331311 (1994-07-01), Doctor
patent: 5381700 (1995-01-01), Grosskopf, Jr.
patent: 5448072 (1995-09-01), Gallagher
patent: 5677533 (1997-10-01), Yaktine et al.

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