scholarly journals Carbon laminates with RE doped optical fibre sensors

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Piotr Miluski ◽  
Marcin Kochanowicz ◽  
Jacek Żmojda ◽  
AbíLio P. Silva ◽  
Paulo N. B. Reis ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Health Monitoring ◽  
Temperature Sensor ◽  
Composite Laminates ◽  
Linear Response ◽  
Relative Sensitivity ◽  
Optical Fibre Sensor ◽  
Distributed Temperature Sensor ◽  
New Type ◽  
Fibre Sensor

Abstract A new type of luminescent optical fibre sensor for structural health monitoring of composite laminates (CFRP) is proposed. The Nd3+ doped multi-core doubleclad fibre incorporated in composite structure was used as a distributed temperature sensor. The change of luminescence intensity (Nd3+ ions) at the wavelength of 880 nm (4F3/2 → 4I9/2) and 1060 nm (4F3/2 → 4I11/2) was used for internal temperature monitoring. The special construction of optical fibre was used as it assures an efficient pumping mechanism and, at same time, it increases the measuring sensitivity. The linear response with relative sensitivity 0.015 K−1 was obtained for temperature range from 30 up to 75ºC. The manufacturing process of CFRP with embedded optical fibre sensor is also discussed.

Using distributed optical fibre sensor to enhance structural health monitoring of a pipeline subjected to hydraulic transient excitation

2017 ◽  
Vol 17 (2) ◽  
pp. 298-312 ◽  
Author(s):  
Leslie Wong ◽  
Wing Kong Chiu ◽  
Jayantha Kodikara
Keyword(s):  
Structural Health Monitoring ◽  
Optical Fibre ◽  
Health Monitoring ◽  
Water Hammer ◽  
Operating Conditions ◽  
Pipeline System ◽  
Material Loss ◽  
Structural Health ◽  
Optical Fibre Sensor ◽  
Fibre Sensor

Distributed optical fibre sensors have been applied in monitoring the structural health of water pipelines over the past decades. Most of these studies show that distributed optical fibre sensor is quite effective for static and quasi-static measurements and can be used for monitoring the condition of a pipeline. It is well known that pressure transients (water hammer) can occur in any pressurised pipeline system due to changes in the operating conditions. This article shows the ability of distributed optical fibre sensor to exploit these transient hydraulic pressures along the pipeline for assessing its condition. In this regard, this article aims to demonstrate the concept of utilising this natural stimulus to enhance the pipeline structural health monitoring with the distributed sensing. A total of three experimental case studies (multiple anomalies, material loss and leakage) along plastic pipes will then be reported using a water hammer as a transient excitation for the structural health monitoring applications using distributed optical fibre sensor. The results will show that the presence of a localised damage/anomaly monitored by the distributed optical fibre sensor is accentuated by the dynamic response of the pipe when subjected to water hammer.

scholarly journals Optical fibre Sensor for Simultaneous Temperature and Relative Humidity Measurement: Towards Absolute Humidity Evaluation

2021 ◽  
pp. 130154
Author(s):  
Chenyang He ◽  
Serhiy Korposh ◽  
Ricardo Correia ◽  
Liangliang Liu ◽  
Barrie R. Hayes-Gill ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Optical Fibre ◽  
Absolute Humidity ◽  
Humidity Measurement ◽  
Optical Fibre Sensor ◽  
Fibre Sensor

scholarly journals Surface polymer imprinted optical fibre sensor for dose detection of dabrafenib

The Analyst ◽  
2020 ◽  
Vol 145 (13) ◽  
pp. 4504-4511 ◽  
Author(s):  
Chenyang He ◽  
Ulises Hernandez Ledezma ◽  
Pratik Gurnani ◽  
Thais Albelha ◽  
Kristofer J. Thurecht ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Cancer Drugs ◽  
Optical Fibre Sensor ◽  
Anti Cancer ◽  
Fibre Sensor ◽  
New Generation

Dabrafenib is one of the most widely used of the new generation of targeted anti-cancer drugs.

Flow cell with hybrid LPG and FBG optical fibre sensor for refractometric measurements

2011 ◽  
Author(s):  
F. Baldini ◽  
M. Brenci ◽  
F. Chiavaioli ◽  
R. Falciai ◽  
C. Trono
Keyword(s):  
Optical Fibre ◽  
Flow Cell ◽  
Optical Fibre Sensor ◽  
Fibre Sensor
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