Using Fast-Fourier-Transform (FIT) For The Phase-Doppler-Dp Erence-Analysis Of Powder Metal Sprays

K. Bauckhage; A. Schone; TH . Wriedt

doi:10.1117/12.968878

16 January 1988 Using Fast-Fourier-Transform (FIT) For The Phase-Doppler-Dp Erence-Analysis Of Powder Metal Sprays

K. Bauckhage, A. Schone, TH . Wriedt

Proceedings Volume 0952, Laser Technologies in Industry; (1988) https://doi.org/10.1117/12.968878
Event: Laser Technologies in Industry, 1988, Porto, Portugal

Abstract

Application of the phase-Doppler-difference-analysis to ,spraying and compacting molten metals to measure particle size and velocity distributions is difficult because of the high background noise level of the signals detected by the photodetectors. Common counter processors will not work properly with such noisy signals. Therefore a modified laser-Doppler-processor based on the fast Fourier transform is described and its performance evaluated by simulation and by analysing signals originating from rough and nonspherical CuAl particles.

Citation Download Citation

K. Bauckhage, A. Schone, and TH . Wriedt "Using Fast-Fourier-Transform (FIT) For The Phase-Doppler-Dp Erence-Analysis Of Powder Metal Sprays", Proc. SPIE 0952, Laser Technologies in Industry, (16 January 1988); https://doi.org/10.1117/12.968878

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