US 12,117,336 B2
Optical fiber sensing system, optical fiber sensing method, and optical fiber sensing apparatus
Tadayuki Iwano, Tokyo (JP); Satoru Ishii, Tokyo (JP); Yoshinori Kitahara, Tokyo (JP); and Yoshiaki Aono, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/765,074
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Oct. 7, 2019, PCT No. PCT/JP2019/039486
§ 371(c)(1), (2) Date Mar. 30, 2022,
PCT Pub. No. WO2021/070222, PCT Pub. Date Apr. 15, 2021.
Prior Publication US 2022/0397449 A1, Dec. 15, 2022
Int. Cl. G01H 9/00 (2006.01); G01D 5/353 (2006.01); G01D 21/00 (2006.01); H04B 10/073 (2013.01)
CPC G01H 9/004 (2013.01) [G01D 5/35358 (2013.01); G01D 21/00 (2013.01); H04B 10/073 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An optical fiber sensing system, comprising:
a first optical fiber network deployed in a first area and configured to detect first sensing information about a monitoring target;
a second optical fiber network deployed in a second area separated from the first area and configured to detect second sensing information about the monitoring target;
a first receiver configured to receive a first light signal from the first optical fiber network;
a second receiver configured to receive a second light signal from the second optical fiber network; and
at least one processor configured to identify the monitoring target, using the first sensing information included in the first light signal, and the second sensing information included in the second light signal,
wherein the at least one processor is configured to identify the monitoring target in the first area, using the first sensing information included in the first light signal,
wherein the at least one processor is configured to identify the monitoring target in the second area, using the second sensing information included in the second light signal, and
wherein the at least one processor is configured to estimate the monitoring target in a third area between the first area and the second area, using an identification result of the monitoring target in the first area, and an identification result of the monitoring target in the second area.