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Progress in Plasma Processing of Materials, 2001

ISBN:
1-56700-165-3 (Print)

DIGITAL SYSTEM BASED ON CCD CAMERA FOR PARTICLES VELOCITY AND TEMPERATURE MONITORING IN THERMAL SPRAYING

M. Ignatiev
Institut de Science et de Génie des Matériaux et Procédés, CNRS., BP.5 Odeillo, 66125 Font-Romeu Cedex, France; Université de Perpignan, 52, avenue de Villeneuve, 66860 Perpignan, France

I. Yu. Smurov
C. N. R. S., Institut de Science et de Genie des Materiaux et Procedes B. P. 5, Odeillo, F-66125 Font-Romeu Cedex; Ecole Nationale d'Ingenieurs de Saint-Etienne, 58 rue Jean Parot, 42023 Saint -Etienne Cedex 2, France

V. N. Senchenko
Institute for high temperature, Russ. Acad. Sci., Moscow; Pyrolab Ltd., Izhorskaya str., 13/19, 127412 Moscow, Russia

Abstract

Industrial type fully digital diagnostic system was developed in the frame of BRITE Project BE 97-5040 for particles velocity and temperature monitoring in thermal spraying. The system is based on the new CCD structure image sensor that provides higher sensitivity in the near infrared spectral region and higher saturation signal level than the conventional devises. The diagnostic system and special software for image treatment have been tested under actual industrial conditions of plasma spraying (in the range 20-50 kW) of Al203 and Zr02+8%Y203 powders. Diagnostic system demonstrates high performance in plasma spraying monitoring: 20 μm particle size detection limit; 1500 K minimum detectable brightness temperature; 700 mls maximum particle velocity.