A Simple Fiber Optic Temperature Sensor For Fire Detection In Hazardous Environment Based On Differential Time Rise/Decay Phosphorescence Response

In the present paper we report the development of a simple temperature sensor based on the difference in the temperature dependences of the rise and decay time and of the intensity responses of Eu 2+ , Dy 3+ doped strontium aluminates. A 374 nm pulsed LED was used as UV source in combination with a...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2022, Vol.71, p.1-1
Main Authors: Fouzar, Samia, Eftimov, Tinko, Kostova, Irena, Dimitrova, Todorka L., Benmounah, Abdelbaki, Lakhssassi, Ahmed
Format: Article
Language:English
Subjects:
Aluminates
Decay
Differential thermal analysis
Fiber optics
Fibre optic sensor
Fire detection
Fire prevention
Hazardous areas
Optical fibers
Phosphorescence
rise/decay responses
Sensitivity
strontium aluminates
temperature sensing
Temperature sensors
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Summary:In the present paper we report the development of a simple temperature sensor based on the difference in the temperature dependences of the rise and decay time and of the intensity responses of Eu 2+ , Dy 3+ doped strontium aluminates. A 374 nm pulsed LED was used as UV source in combination with a lead-in and a lead-out optical fiber to excite the sample and to capture the phosphorescence. We show that because of the power law rise and decay time responses the differential signals measured at earlier instants exhibit the highest sensitivities to temperature over the range from about 5°C to 95°C. Normalized differential signals are characterized by a wide range of linear responses to temperature changes, a sensitivity of up to ≈-1.89 %/°C and a relative error of less than 0.5%. Application to fire prevention is discussed and argumented.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2022.3195249