Novel pyrometer using photothermal effect and fiber optics

Alain Lothon; Yves Denayrolles; Alain Kleitz

doi:10.1117/12.21943

1 March 1990 Novel pyrometer using photothermal effect and fiber optics

Alain Lothon, Yves Denayrolles, Alain Kleitz

Proceedings Volume 1313, Thermosense XII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications; (1990) https://doi.org/10.1117/12.21943
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

A novel pyrometric technique is being developed in Electricite de France (EDF) for measuring the surface temperature of the moving blades of partial load steam turbines. This technique uses the photothermal effect to slightly (temporarily) modify the superficial temperature of the object. Theoretical considerations show that the measurement is proportionnal to successive derivatives of Planck's function. The point is that the measurement is thus made. insensitive to background radiation partially reflected to the detection system by the object itself. Moreover, the short duration of the operation (several microseconds) allows quick moving targets to be measured. We here use the method for monitoring the temperature of the moving blades of partial load steam turbines in EDF nuclear power plants. A rod-shaped probe using fiber optics is being built to take measurements in real conditions. Some laboratory preliminary results show effectiveness and good accuracy of the method. Further studies will permit the extension of this new method to many industrial problems where non-contact temperature measurements in adverse radiative conditions are required.

Citation Download Citation

Alain Lothon, Yves Denayrolles, and Alain Kleitz "Novel pyrometer using photothermal effect and fiber optics", Proc. SPIE 1313, Thermosense XII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (1 March 1990); https://doi.org/10.1117/12.21943

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available