Optical-fiber sensor-network for temperature and proximity control

1992 ◽  
Author(s):  
A. Mencaglia
Keyword(s):  
Optical Fiber ◽  
Sensor Network ◽  
Optical Fiber Sensor ◽  
Fiber Sensor

A Temperature Optical Fiber Sensor Network: From Laboratory Feasibility To Field Trial

1992 ◽  
Author(s):  
H. Fevrier ◽  
J. Hervo ◽  
S. Artigaud ◽  
A. Tardy ◽  
M. Jurczyszyn ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Sensor Network ◽  
Field Trial ◽  
Optical Fiber Sensor ◽  
Fiber Sensor

scholarly journals Long-Reach DWDM-Passive Optical Fiber Sensor Network for Water Level Monitoring of Spent Fuel Pool in Nuclear Power Plant

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4218 ◽  
Author(s):  
Hoon-Keun Lee ◽  
Jaeyul Choo ◽  
Gangsig Shin ◽  
Joonyoung Kim
Keyword(s):  
Optical Fiber ◽  
Water Level ◽  
Sensor Network ◽  
Nuclear Power ◽  
Safety Information ◽  
Optical Fiber Sensor ◽  
Water Levels ◽  
Fiber Sensor ◽  
Spent Fuel ◽  
Spent Fuel Pool

This paper presents a passive optical fiber sensor network based on the dense wavelength division multiplexing (DWDM) to remotely monitor the water level of the spent fuel pool in nuclear power plants. In states of emergency, such as a tsunami, safety information must be secured for rapid response, in spite of all power losses in the plant. We consider the proposed passive sensor network to be one of the best solutions that is able to provide the remote (more than tens of kilometers) monitoring station with the highly reliable on-site information. The principle of water level measurement is based on the change of Fresnel reflection power coefficient at sensing units, which are installed according to the water levels in a row. The sensing units that play the role of reflector and modulator at the same time are connected to an arrayed waveguide grating (AWG) for DWDM. By measuring the spectrum of the optical signal transferred from the sensing units, the water level can be determined in real-time. However, in the remote sensing, the system performance can be seriously degraded due to the Rayleigh Back-Scattering (RBS) of the seeded amplified spontaneous emission (ASE) light that is induced at the fiber-optic link. As such, we investigate the effect of RBS on the remote (more than tens of kilometers) sensing performance of the proposed network. Following the theoretical analysis, we propose a simple network configuration to overcome the RBS issue by utilizing two different transmission paths: one for downstream of the ASE seed light, and the other for upstream of the optical signals coming from the sensing units. Based on the proposed configuration, the maximum sensing distance can be increased up to 42.5 km without the support of any optical amplifier.

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.

Optical Fiber Sensor Network and Industrial Applications

2019 ◽  
pp. 1839-1884
Author(s):  
Qizhen Sun ◽  
Zhijun Yan ◽  
Deming Liu ◽  
Lin Zhang
Keyword(s):  
Optical Fiber ◽  
Sensor Network ◽  
Optical Fiber Sensor ◽  
Industrial Applications ◽  
Fiber Sensor
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