Railway switches and signals – Train-position indication – Miniature model
Patent
1992-09-25
1994-07-19
Huppert, Michael S.
Railway switches and signals
Train-position indication
Miniature model
246246, 25022716, 73800, 385 13, B61L 2502, G01L 124
Patent
active
053301366
ABSTRACT:
A railway track circuit system utilizing an optical sensor which emits a vehicle detection light signal when a railway vehicle is present in a track section. A reference light signal is also generated by a light emission source. A detector in optical communication with the optical sensor receives the vehicle detection light signal. Information contained in the vehicle detection light signal is interpreted by a processor to detect the railway vehicle. In presently preferred embodiments, the sensor may comprise an elongated optical fiber conductor extending along the track section or a plurality of cascaded localized sensors. The sensor may generally also be utilized as a communication medium to pass communication data between opposite ends of the track section. Depending on the exigencies of the particular application, the sensor may be located within the track section in a number of ways.
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Huppert Michael S.
Lowe Scott L.
Union Switch & Signal Inc.
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