Optical fiber sensor and analysis method
AssigneeNEC Corporation
InventorsTomoyuki Hino, Akihiro Tanaka
Life of this patent
Estimating the term…
Abstract
An optical fiber sensor irradiates light pulses into an optical fiber cable and analyses backscattered light thereof. The optical fiber sensor comprises: a determination part that determines a timing at which measurement of an environmental change starts and a timing at which measurement of the environmental change ends, based on the backscattered light; and an occurrence region estimation part that estimates an occurrence region of the environmental change in a longitudinal direction of the optical fiber cable, based on the timing at which measurement of the environmental change starts; the timing at which measurement of the environmental change ends; and a pulse width of the light pulses.
Claims20
An optical fiber sensor that irradiates light pulses into an optical fiber cable and analyses backscattered light thereof, the optical fiber sensor comprising:
- a determination part that determines a timing at which measurement of an environmental change starts and a timing at which measurement of the environmental change ends, based on the backscattered light;
- and
- an occurrence region estimation part that estimates an occurrence region of the environmental change in a longitudinal direction of the optical fiber cable, based on:
- the timing at which measurement of the environmental change starts;
- the timing at which measurement of the environmental change ends;
- and a pulse width of the light pulses.
An analysis method that comprises:
- irradiating light pulses into an optical fiber cable;
- and analyzing backscattered light thereof, the analysis method comprising:
- determining a timing at which measurement of an environmental change starts and a timing at which measurement of the environmental change ends, based on the backscattered light;
- and
- estimating an occurrence region of the environmental change in a longitudinal direction of the optical fiber cable, based on the timing at which measurement of the environmental change starts;
- the timing at which measurement of the environmental change ends;
- and pulse width of the light pulses.
A non-transient computer readable recording medium storing a program executed in an optical fiber sensor that irradiates light pulses into an optical fiber cable and analyses backscattered light thereof, the program causing to:
- determine a timing at which measurement of an environmental change starts and a timing at which measurement of the environmental change ends, based on the backscattered light;
- and
- estimate an occurrence region of the environmental change in a longitudinal direction of the optical fiber cable, based on the timing at which measurement of the environmental change starts, the timing at which measurement of the environmental change ends, and a pulse width of the light pulses.
Dependencies are inferred from the claim text.