26-05-2023 дата публикации
Номер: CN116164651A
Принадлежит:
The invention discloses a multipoint displacement sensing system based on optical fiber macrobend loss, and belongs to the field of optical fiber sensing. Comprising a pulse laser, a first optical fiber coupler, an optical fiber connector, a first single-mode optical fiber, a second optical fiber coupler, a third optical fiber coupler, a first displacement sensor, a second single-mode optical fiber, a fourth optical fiber coupler, a fifth optical fiber coupler, a second displacement sensor, a third single-mode optical fiber, a photoelectric detector, a voltage amplifier, an A/D converter and a data collector. The change of displacement can obviously change the value of SNS macroscopic bending loss, so that the change of FLM reflection energy is caused, each FLM forms a displacement sensing unit, each sensing unit only inputs 5% of pulse light energy, the influence of light source energy fluctuation is reduced, the number of sensors capable of being repeatedly used is increased, all the ...
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