TITLE:
Development and Application of Distributed Optical Fiber Instruments
AUTHORS:
Jian Li, Mian Zhang, Shuaiyu Song
KEYWORDS:
Oil and Gas Pipeline Monitoring, BOTDR, POTDR, Fiber Grating
JOURNAL NAME:
Open Access Library Journal,
Vol.9 No.12,
December
28,
2022
ABSTRACT: At present, the Brillouin Optical Time Domain Reflectometer (BOTDR) sensor has been widely used in oil and gas pipeline monitoring and maintenance, and the ability to resist cross-interference is weak for the BOTDR sensor system, and it cannot process interference data at the same time. A Polarized Optical Time Domain Reflectometer (POTDR) based on the polarization effect is designed, which is based on the traditional POTDR sensor system and combined with the fiber grating, by using the fiber grating to enhance the intensity of the reflected signal light, effectively improve the signal-to-noise ratio of the sensor system, make the vibration measurement more accurate, and achieve the purpose of monitoring different fault points at the same time. Solve the limitation that BOTDR can only monitor the fault point individually. The fully distributed optical fiber sensor combined with the fiber grating gets rid of the limitation that BOTDR and POTDR can only monitor a single physical quantity parameter, and can monitor multiple physical quantity parameters at the same time, and the system is low cost, stable and feasible, and can be applied to the field of oil and gas pipeline monitoring on a large scale.