OPTICAL DEVICE FOR CONTROL OVER TRACK FILLING Russian patent published in 2019 - IPC B61L17/00 

FIELD: transport traffic control systems.

SUBSTANCE: invention relates to railway automation at marshalling yards for control over track filling. Device comprises two fiber-optic lines, on controlled section along rail line on its opposite sides, one of lines is connected to source of monochromatic radiation and consists of series-connected optical Y-splitters, at that output of each of them is connected to the next through optical amplifier, another line is connected to photodetector and consists of series-connected optical Y-couplers, each of which is located opposite corresponding Y-splitter, wherein the second output of the Y-splitter, whose input is connected to the monochromatic radiation source, is connected to the second input of the Y-coupler, connected by the output to the photodetector, second output of each next Y-splitter is connected by means of installed under the rail line sensor based on the Bragg grating with the second input of the opposite Y-coupler, and the first output of the latter in the Y-splitter line is connected by means of the Bragg grating-based sensor installed under the rail line to the first input of the Y-coupler located opposite to it.

EFFECT: simplified device and higher accuracy of track filling control.

1 cl, 1 dwg