Fiber optic monitor for railroad switch
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Sep 28, 2006
app pub date -
Mar 27, 2006
filing date -
Mar 25, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An improved railroad switch monitoring unit of the type that determines whether a mobile rail is brought into a closed state or an open state with respect to a stationary rail. The improvement comprises a fiber Bragg grating (FBG) included in the monitoring unit that is used to determine, based on stress able change in the resonant wavelength of the FBG, whether the mobile rail and the stationary rail are closed or open.
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