A ten channel fibre-optic device for distributed sensing of underground hydrocarbon leakage

2000 ◽  
Vol 2 (6) ◽  
pp. 670-673 ◽  
Author(s):  
Laurie J. Ritchie ◽  
Clive P. Ferguson ◽  
Conrad Bessant ◽  
Selwayan Saini
Keyword(s):  
Distributed Sensing ◽  
Fibre Optic

scholarly journals Distributed Sensing Based on Interferometry and Polarization Methods for Use in Fibre Infrastructure Protection

Sensors ◽  
2019 ◽  
Vol 19 (8) ◽  
pp. 1810
Author(s):  
Petr Munster ◽  
Tomas Horvath ◽  
Josef Vojtech
Keyword(s):  
Direct Detection ◽  
Average Power ◽  
Distributed Sensing ◽  
Acoustic Vibrations ◽  
Fibre Optic ◽  
Laboratory Measurements ◽  
Unexpected Events ◽  
Infrastructure Protection ◽  
Sensing Systems

Fibre optic infrastructures are very important, and therefore, it is necessary to protect them from fibre cuts. Most fibre cuts are caused by digging activity, and many network operators seek appropriate solutions enabling detection of possible unexpected events (predict these cuts) and subsequent network outages. In most cases, there is no need to locate events, and only information regarding the occurrence of the event is sufficient. Direct detection-based distributed fibre optic sensing systems appear to be an appropriate solution, allowing digging to be detected before the fibre breaks. The average power of such signals is relatively small, and there is no interference with other signals in the fibre. We performed laboratory measurements to compare the sensitivity and accuracy of interferometric and polarization systems for acoustic vibrations. In the case of interferometric systems, the reference and sensing arms were in the same cable, and both were subjected to acoustic vibrations.

Recent developments in fibre optic sensors for point and distributed sensing in large structures

1998 ◽  
Author(s):  
Yun-Jiang Rao ◽  
Norman E. Fisher ◽  
Philip J. Henderson ◽  
V. Lecoeuche ◽  
Christopher N. Pannell ◽  
...  
Keyword(s):  
Distributed Sensing ◽  
Fibre Optic ◽  
Large Structures ◽  
Recent Developments

Fibre-optic temperature sensor with wide temperature range characteristics

1987 ◽  
Vol 134 (5) ◽  
pp. 291 ◽  
Author(s):  
K.T.V. Grattan ◽  
J.D. Manwell ◽  
S.M.L. Sim ◽  
C.A. Willson
Keyword(s):  
Wide Temperature Range ◽  
Temperature Sensor ◽  
Fibre Optic ◽  
Temperature Range

Spectrum Sensing Architecture and Use Case Study: Distributed Sensing over Rayleigh Fading Channels

2009 ◽  
Vol E92-B (12) ◽  
pp. 3606-3615 ◽  
Author(s):  
Chen SUN ◽  
Yohannes D. ALEMSEGED ◽  
Ha Nguyen TRAN ◽  
Hiroshi HARADA
Keyword(s):  
Fading Channels ◽  
Spectrum Sensing ◽  
Rayleigh Fading ◽  
Distributed Sensing ◽  
Rayleigh Fading Channels ◽  
Use Case
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