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

The Use of Fibre Optic Techniques for Temperature Measurement

1987 ◽  
Vol 20 (6) ◽  
pp. 32-39 ◽  
Author(s):  
K T V Grattan
Keyword(s):  
Temperature Measurement ◽  
Subject Area ◽  
Temperature Sensing ◽  
Rapid Expansion ◽  
Fibre Optic ◽  
Recent Developments ◽  
The Subject

The subject area of fibre optic sensing is one in which there has been shown a very rapid expansion of interest over the last few years. Many novel techniques are appearing in the literature and some products are available to the industrial user. The background to fibre optic means of temperature sensing and some recent developments will be reviewed in this paper.

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 Recent developments in fibre optic shape sensing

Measurement ◽  
2018 ◽  
Vol 128 ◽  
pp. 119-137 ◽  
Author(s):  
Moe Amanzadeh ◽  
Saiied M. Aminossadati ◽  
Mehmet S. Kizil ◽  
Aleksandar D. Rakić
Keyword(s):  
Fibre Optic ◽  
Recent Developments ◽  
Shape Sensing

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.

scholarly journals Structural Health Monitoring Using Fibre Optic Acoustic Emission Sensors

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6369
Author(s):  
James Owen Willberry ◽  
Mayorkinos Papaelias
Keyword(s):  
Acoustic Emission ◽  
Condition Monitoring ◽  
Electromagnetic Interference ◽  
Damage Evolution ◽  
High Refractive Index ◽  
Industrial Applications ◽  
Fibre Optic ◽  
Wide Range ◽  
Recent Developments ◽  
Acoustic Emission Sensors

Acoustic emission (AE) is widely used for condition monitoring of critical components and structures. Conventional AE techniques employ wideband or resonant piezoelectric sensors to detect elastic stress waves propagating through various types of structural materials, including composites during damage evolution. Recent developments in fibre optic acoustic emission sensors (FOAES) have enabled new ways of detecting and monitoring damage evolution using AE. An optical fibre consists of a core with a high refractive index and a surrounding cladding. The buffer layer and outer jacket both act as protective polymer layers. Glass optical fibres can be used for manufacturing AE sensors of sufficiently small size to enable their embedding into fibre-reinforced polymer composite materials. The embedding process protects the FOAES against environmental stresses prolonging operational lifetime. The immunity of FOAES to electromagnetic interference makes this type of sensor attractive for condition monitoring purposes across a wide range of challenging operational environments. This paper provides an exhaustive review of recent developments on FOAES including their fundamental operational principles and key industrial applications.

Ultrasonic/Guided Waves for Structural Health Monitoring

2005 ◽  
Vol 293-294 ◽  
pp. 49-62 ◽  
Author(s):  
W.J. Staszewski
Keyword(s):  
Damage Detection ◽  
Structural Damage ◽  
Guided Waves ◽  
Ultrasonic Waves ◽  
Detection Methods ◽  
Smart Sensor ◽  
Large Structures ◽  
Guided Ultrasonic Waves ◽  
Damage Monitoring ◽  
Recent Developments

Structural damage detection and monitoring is one of the major maintenance activities in transportation, processing and civil engineering. Current procedures are based on scheduled inspections which are often time/labour consuming and expensive. Guided ultrasonic waves offer the ability of inspecting large structures with a small number of transducers. Recent developments in smart sensor technologies allow for integration of these transducers with monitored structures. This is associated with a new design philosophy leading to more efficient and economically attractive structures. The paper briefly discusses various damage detection methods based on structural, ultrasonic and guided ultrasonic waves. The focus is on recent research advances in damage monitoring techniques, smart sensor technologies and signal processing.

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