Method and apparatus for light outage detection
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 24, 2001
Grant Date -
N/A
app pub date -
Jun 1, 2000
filing date -
Jun 1, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
To reduce or eliminate difficulties inherent in manual reporting of signal light failures, especially at remote railroad grade crossings, there is provided, in one embodiment of the present invention, a system for monitoring failure of a lighted signal that includes lighting configured to flash during a predetermined alarm condition. The system includes a power supply configured to power the lighting during the predetermined alarm condition and to provide a timing signal indicative of power being applied to the lighting; a detector/transmitter responsive to the timing signal to detect lighting parameters when the lighting is flashed on to generate a signal indicative of the lighting parameters and to generate a signal indicative of the lighting parameters; and a receiver/concentrator responsive to the signal indicative of the lighting parameters to generate a signal indicative of predetermined fault conditions of the lighting.
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