US 12,072,232 B2
Optical fiber sensing system, optical fiber sensing apparatus, and reservoir monitoring method
Tatsuki Tanaka, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/640,472
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Sep. 13, 2019, PCT No. PCT/JP2019/036229
§ 371(c)(1), (2) Date Mar. 4, 2022,
PCT Pub. No. WO2021/049035, PCT Pub. Date Mar. 18, 2021.
Prior Publication US 2022/0341773 A1, Oct. 27, 2022
Int. Cl. G01H 9/00 (2006.01); E02B 7/38 (2006.01)
CPC G01H 9/004 (2013.01) [E02B 7/38 (2013.01)] 20 Claims
OG exemplary drawing
 
15. A reservoir monitoring method by of an optical fiber sensing system, the method comprising:
a reception operation comprising:
receiving backscattered light from an optical fiber provided on a water discharge gate of a reservoir or in a vicinity of the water discharge gate; and
determining a vibration pattern using the backscattered light; and
a detection operation comprising detecting whether an opening amount of the water discharge gate is appropriate using the vibration pattern.