Real-time control of surface treatments with liquid phase: molten-depth on-line estimation

Hugues Derouet; Frederic Coste; Lilian Sabatier; Remy Fabbro

doi:10.1117/12.251187

23 September 1996 Real-time control of surface treatments with liquid phase: molten-depth on-line estimation

Hugues Derouet, Frederic Coste, Lilian Sabatier, Remy Fabbro

Proceedings Volume 2789, High-Power Lasers: Applications and Emerging Applications; (1996) https://doi.org/10.1117/12.251187
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

Abstract

Surface treatments with remelting have often irregular quality. This article presents on-line control of laser melting which induces an improved quality of the treatment and more regular results. In order to build up a regulator, different sensor have been experimented. Responses are analyzed versus static and dynamic process commands. The molten depth is estimated on-line from molten pool dimensions measured by the CCD camera and image on-line processing. A state model is developed. The system is controlled by three variables: sample velocity, laser power and intensity distribution. The outputs of the system are the depth and width of the melted zone, and the temperature field. The commands and the outputs are chosen in accordance with the application under consideration. Therefore the process has been regulated.

Citation Download Citation

Hugues Derouet, Frederic Coste, Lilian Sabatier, and Remy Fabbro "Real-time control of surface treatments with liquid phase: molten-depth on-line estimation", Proc. SPIE 2789, High-Power Lasers: Applications and Emerging Applications, (23 September 1996); https://doi.org/10.1117/12.251187

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