Thermal conditions in the area exposed to energy flux determine the sequence of physical and chemical transformations in the processed material. Consequently, the information on temperature dynamics over the total thermal cycle is of a primary interest for technologic control.

• comprehend and optimise technologies employing concentrated energy flux (in particular, find the resulting effect of thermal evolution of the processed material on material properties;
• develop on-line process control system managing in real-time the main processing parameters on the basis of data supplied by sensors and optical monitoring devices.

1. Exemples d’utilisation des pyromètres lors d’applications industrielles
   • Traitement de surface par laser pulsé périodique
   • Soudage par laser CO2 d’alliage de titane, acier
   • Rechargement par laser, plasma
   • Frittage des poudres par laser
   • Applications de plasma thermique
   • SLS-Process monitoring and adaptive control
   • On-line optical monitoring of Nd:YAG laser lap weldingof Zn-coated steel sheets
   • Laser process optical sensing and control
   
   
   
   
2. Méthode de restauration de la température vraie
   • Action laser pulsé
   • Contrôle en ligne et détermination de la température pour le rechargement par laser
   
   
3. Diagnostic optique dans le procédé de projection thermique

Pyromètres, Cameras CCD, Camera FLIR Phoenix RDAC

Staff: Doubenskaia M., Bertrand Ph., Bayle F.
Associates: Chivel Y., Ignatiev M.

1. M. Ignatiev, I. Yu. Smurov, G. Flamant, V. Senchenko ,V. Dozhdikov. Two-dimensional resolution pyrometer for real-time monitoring of temperature image in laser materials processing // Applied Surface Science, 1997, v.109/110, pp. 498-508.

2. Bertrand Ph., Ignatiev M., Flamant G. and Smurov I. Pyrometry applications in thermal plasma processing // Vacuum, v. 56, 2000, pp. 71-76.

3. Ph. Bertrand, I. Smurov, and D. Grevey, Application of near infrared pyrometry for continuous Nd:YAG laser welding of stainless steel and titanium plates // Applied Surface Science, 2000, v. 168, pp. 182-185.

4. M. Doubenskaya, I. Smurov, Surface temperature evolution in pulsed laser action of millisecond range // Applied Surface Science, 252, 2006, pp. 4472-4476.

5. Ignatiev M., Smurov I., Bertrand Ph., Application of digital CCD camera for monitoring of particle-in-flight parameters in plasma and HVOF spraying // International Thermal Spray Conference, ITSC-2002, Essen, Germany, March 4-6, 2002, pp.72-77.