Title :
Application of Fourier analysis to phase-Doppler-signals generated by rough metal particles
Author :
Wriedt, Thomas ; Bauckhage, Klaus A. ; Schöne, Armin
Author_Institution :
Dept. of Production Technol., Bremen Univ., West Germany
fDate :
10/1/1989 12:00:00 AM
Abstract :
With the phase-Doppler-difference method the diameter and the velocity of spherical particles can be determined by measuring the frequency and the phase difference of burst signals detected by two or more photodetectors. A Fourier analysis method is described that extracts frequency and phase information from the Doppler signals. The system is designed around a TMS320C25 signal-processor board fitted into an AT computer. The performance of the frequency and phase estimator is examined. The method is particularly useful with noisy burst signals, such as those that occur in investigating a metal spraying process
Keywords :
Doppler effect; Fourier analysis; computerised instrumentation; computerised signal processing; diameter measurement; fast Fourier transforms; laser velocimetry; microcomputer applications; particle size measurement; powder technology; AT computer; FFT; Fourier analysis; TMS320C25 signal-processor board; burst signals; diameter; frequency estimator; metal spraying process; phase estimator; phase-Doppler-signals; photodetectors; powder technology; rough metal particles; velocity of spherical particles; Frequency estimation; Frequency measurement; Information analysis; Particle measurements; Phase detection; Phase frequency detector; Phase measurement; Photodetectors; Signal detection; Velocity measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
