scholarly journals Review of Optical Fiber Sensor Network Technology Based on White Light Interferometry

2021 ◽  
Vol 11 (1) ◽  
pp. 31-44
Author(s):  
Wenchao Li ◽  
Yonggui Yuan ◽  
Jun Yang ◽  
Libo Yuan
Keyword(s):  
Optical Fiber ◽  
Sensor Network ◽  
White Light ◽  
Large Scale ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Long Distance ◽  
Light Interference ◽  
White Light Interference ◽  
Distributed Measurement

AbstractOptical fiber sensor networks (OFSNs) provide powerful tools for large-scale buildings or long-distance sensing, and they can realize distributed or quasi-distributed measurement of temperature, strain, and other physical quantities. This article provides some optical fiber sensor network technologies based on the white light interference technology. We discuss the key issues in the fiber white light interference network, including the topology structure of white light interferometric fiber sensor network, the node connection components, and evaluation of the maximum number of sensors in the network. A final comment about further development prospects of fiber sensor network is presented.

A Multiplexed Optical Fiber Sensor System For Distributed Measurement Of Structural Strains

1997 ◽  
Vol 503 ◽  
Author(s):  
F. Ansari ◽  
Z. Chen ◽  
Q. Li
Keyword(s):  
Optical Fiber ◽  
Optical Switch ◽  
Optical Fiber Sensor ◽  
Fiber Material ◽  
Smart Structure ◽  
Sensor System ◽  
Fiber Sensor ◽  
Fiber Sensors ◽  
Large Structures ◽  
Distributed Measurement

ABSTRACTStructurally integrated optical fiber sensors form the basis for smart structure technology. Over the past decade a variety of sensor configurations have been developed for measurement of strains and deformations in structures. Strains and deformations alter the refractive index and the geometry of the optical fiber material. These changes perturb the intensity, phase, and polarization of the light-wave propagating along the probing fiber. The optical perturbations are detected for the determination of strain. The research presented here describes the development of a new optical fiber sensor system for measurement of structural strains based on white light interferometry. An optical switch provides for multiplexing of strain signals from various locations in the structure. Redundant Bragg grating type fiber optic sensors as well as strain gauges were employed for comparison and verification of strain signals as measured by the new system. The system provides capability for distributed sensing of strains in large structures.

Basic Strategy of Health Monitoring on Submarine Pipeline by Distributed Optical Fiber Sensor

2003 ◽  
Author(s):  
Wei-Liang Jin ◽  
Jian-Wen Shao ◽  
En-Yong Zhang
Keyword(s):  
Optical Fiber ◽  
Oil And Gas ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Gas Transfer ◽  
Pipeline System ◽  
Submarine Pipeline ◽  
Long Distance ◽  
Distributed Optical Fiber Sensor ◽  
Distributed Optical Fiber

Submarine pipeline system is a main pattern in collection and transmission of offshore oil and gas, which sends oil and gas from offshore oil/gas field to land, and it plays an important role in the production of oil and gas. Because of the complicated and harsh condition in which pipeline system works, such as impulsion, corrosion and free-spanning vibration, failure of submarine pipeline system occurs occasionally, it causes oil leakage, environment pollution and economic losses. Health monitoring is a feasible and effective manner to ensure submarine pipeline safe and reliable during service, especially when all factors affecting pipeline failure are not still entirely realized or controlled. The basic strategy of a new real-time monitoring system for long distance submarine pipeline is introduced in this paper, which has the function of diagnosis and auto-alarm. In this system, a new distributed optical fiber sensor (DOFS), which uses optical time domain reflectometry theory based on Brillouin backscatter, is applied to monitor the strain and temperature along the pipeline. To be used for long distance submarine pipeline, this system applies Wavelength Division Multiplex (WDM) technology and series DOFSs in series so as to extend the measure scope for long distance submarine pipeline. By using signal processing system to analyze the outcome data of sensor, the strain along the pipeline can be obtained. If the strain reaches the alarm setting, the system will send out caution and meanwhile accurately give the damage position. The system can also analyses vibration frequency of pipeline, if free-spanning vibration occurs, caution will also be given, so that the operator can take some measures in time to avoid the failure of pipeline. In this paper, the makeup of distributed optical fiber sensor and developing principle are specified, system development, application and construction in engineering are analyzed as well. The brand new practical system can not only be used for submarine oil and gas pipeline but also for land oil and gas transfer system, city coal gas transfer system, electricity-transmission cable and so on. This system can be widely used in many prospects of other industries.

scholarly journals Distributed measurement of high electric current by means of polarimetric optical fiber sensor

2015 ◽  
Vol 23 (9) ◽  
pp. 11073 ◽  
Author(s):  
Luca Palmieri ◽  
Davide Sarchi ◽  
Andrea Galtarossa
Keyword(s):  
Optical Fiber ◽  
Electric Current ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Distributed Measurement
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