Real-time distributed optical fiber vibration sensing based on phase-sensitive OTDR

2018 ◽  
Author(s):  
Xin Liu ◽  
Yu Wang ◽  
Jianguo Zhang ◽  
Dong Wang ◽  
Pengfei Wang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Real Time ◽  
Vibration Sensing ◽  
Phase Sensitive ◽  
Distributed Optical Fiber

scholarly journals A Combined Events Recognition Scheme Using Hybrid Features in Distributed Optical Fiber Vibration Sensing System

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 105609-105616
Author(s):  
Kun Liu ◽  
Zhenshi Sun ◽  
Junfeng Jiang ◽  
Pengfei Ma ◽  
Shuang Wang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Hybrid Features ◽  
Sensing System ◽  
Vibration Sensing ◽  
Distributed Optical Fiber

scholarly journals Real-Time Monitoring of Temperature Rises of Energized Transformer Cores With Distributed Optical Fiber Sensors

2019 ◽  
Vol 34 (4) ◽  
pp. 1588-1598 ◽  
Author(s):  
Ping Lu ◽  
Michael P. Buric ◽  
Kevin Byerly ◽  
Seung Ryul Moon ◽  
Mst Nazmunnahar ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Real Time ◽  
Optical Fiber Sensors ◽  
Real Time Monitoring ◽  
Fiber Sensors ◽  
Distributed Optical Fiber

Study on Oil and Gas Pipeline Leakage Real-Time Inspection System Based on Distributed Optical Fiber

2008 ◽  
Author(s):  
Hao Feng ◽  
Shijiu Jin ◽  
Yan Zhou ◽  
Zhoumo Zeng ◽  
Pengchao Chen
Keyword(s):  
Optical Fiber ◽  
Real Time ◽  
Optical Fibers ◽  
Oil And Gas ◽  
New Technology ◽  
Inspection System ◽  
System Construction ◽  
Fiber System ◽  
Distributed Optical Fiber ◽  
The Cost

A distributed optical fiber system used to detect pipeline leakage and lawless excavation is put forward in this paper. This system is based on Mach-Zehnder optical fiber interferometer theory, which uses three monomode fibers in one optical fiber cable to compose two Mach-Zehnder interferometers. Vibrations from leakage point and lawless excavation along the pipeline can be acquired by the optical fibers, so the vibrations occurred on the pipeline can be detected in real time. In this paper, the principle and the system construction are introduced, and the way of the fiber cable to influence the sensitivity is studied. And also, the polarization on the optical path is studied in this paper, and a new technology to eliminate “Polarization Debilitating” is put forward. With principle analysis and experimental results, it is demonstrated that the detection system’s measuring sensitivity and location accuracy for detecting leakage and lawless excavation are greatly improved when adopting this technology, and furthermore the cost is very low.

Study on Oil and Gas Pipeline Leakage Real-Time Inspection System Based on Distributed Optical Fiber

2008 ◽  
Vol 381-382 ◽  
pp. 447-450 ◽  
Author(s):  
Y. Zhou ◽  
Shi Jiu Jin ◽  
H. Feng ◽  
Z.M. Zeng ◽  
Z.G. Qu
Keyword(s):  
Optical Fiber ◽  
Real Time ◽  
Optical Fibers ◽  
Oil And Gas ◽  
Single Mode ◽  
Vibration Sensor ◽  
Inspection System ◽  
System Construction ◽  
Detection Technology ◽  
Distributed Optical Fiber

A new distributed optical fiber pipeline leakage detection technology based on Mach-Zehnder optical fiber interferometer theory is put forward. When using this technology, an optical fiber cable is laid along the pipeline. Noise from leaking point on the pipeline can be acquired by the optical fiber vibration sensor which was composed of three single mode optical fibers, thus, leakage occurred on the pipeline can be detected in real time. The detection principle and system construction are explained and in-site testing data is analyzed. With principle analysis and experimental results, it is demonstrated that the detection system’s measuring sensitivity and location accuracy for detecting leakage are high when adopting this technology.

Multi-event waveform-retrieved distributed optical fiber acoustic sensor using dual-pulse heterodyne phase-sensitive OTDR

2017 ◽  
Vol 42 (3) ◽  
pp. 442 ◽  
Author(s):  
Xiangge He ◽  
Shangran Xie ◽  
Fei Liu ◽  
Shan Cao ◽  
Lijuan Gu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Acoustic Sensor ◽  
Phase Sensitive ◽  
Distributed Optical Fiber
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