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Related Experiment Video

Updated: Jun 12, 2026

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

Phosphor-based thermometry of rotating surfaces.

L Mannik, S K Brown, S R Campbell

|May 22, 2010

Summary

This study explores phosphor thermometry for generator rotor temperature monitoring. Europium-doped yttrium oxysulfide phosphors show promise for accurate measurements in industrial settings.

Area of Science:

Materials Science
Optical Engineering
Thermodynamics

Background:

Accurate temperature monitoring of generator rotors is critical for operational efficiency and safety.
Traditional methods may face limitations in harsh industrial environments.
Phosphor thermometry offers a potential non-contact temperature sensing solution.

Purpose of the Study:

To investigate the feasibility of using phosphor thermometry for generator rotor temperature monitoring.
To evaluate the performance of europium-doped yttrium oxysulfide phosphors in the 60-150°C range.
To assess the impact of operational factors like oil and magnetic fields on sensor performance.

Main Methods:

Utilized UV laser excitation to stimulate visible emission from europium-doped yttrium oxysulfide phosphors.

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In Situ Surface Temperature Measurement in a Conveyor Belt Furnace via Inline Infrared Thermography

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Measured the decay time of the phosphor's emission as a function of temperature.

Employed a fiber-optic system for light delivery and collection.

Conducted laboratory tests on a rotating disk simulating generator rotor conditions.

Main Results:

Demonstrated the capability of phosphor thermometry for temperature monitoring within the specified range.
Characterized the temperature-dependent luminescence decay time of the phosphor.
Reported initial findings on the influence of oil and magnetic fields on sensor response.

Conclusions:

Phosphor thermometry using europium-doped yttrium oxysulfide is a viable technique for generator rotor temperature monitoring.
The developed fiber-optic system is suitable for laboratory validation.
Further research is needed to fully understand and mitigate the effects of environmental factors.