Fiber optic probe and system for particle size and velocity meas

Details Fiber optic probe and system for particle size and velocity meas Fiber optic probe and system for particle size and velocity meas

1985-11-08

1987-05-05

Willis, Davis L.

Optics: measuring and testing

For size of particles

By particle light scattering

250227, 250574, 356338, G01N 2151

Patent

active

046627499

ABSTRACT:
A system for the simultaneous measurement of the size and velocities of bubbles or drops in a multiphase process environment wherein light passing through a Ronchi grating is projected onto a measurement volume within the multiphase process stream by a coherent fiber optic bundle and a gradient index imaging lens. Drops or bubbles passing through the measurement volume reflect or refract light which is sensed by velocity and size sensor fiber optic bundles disposed opposite the imaging lens and the sensed signal is coupled to signal processing means which convert the light signal to electrical signals and the appropriate size velocity measurments are made using one or more of the visibility techniques, phase lag techniques or transit time techniques.

REFERENCES:
patent: 3906241 (1975-09-01), Thompson
patent: 3954342 (1976-05-01), Boeke
patent: 4497577 (1985-02-01), Sato et al.
patent: 4595291 (1986-06-01), Tatsuno
"An Instrument for Spray Droplet Size & Velocity Measurements", W. D. Bachalo, et al., Paper No. 79-WA/GT-13, ASME vol. 102, Oct. 1980.
"Phase/Doppler Spray Analyzer for Simultaneous Measurements of Drop Size & Velocity Distributions", W. D. Bachalo, & M. J. Houser Optical Engineering, Sep./Oct., 1984, vol. 23, No. 5.
"Fringe Image Technique for the Measurement of Flow Velocities" E. A. Ballik & J. H. C. Chan, Applied Optics, Nov. 1973, vol. 12, No. 11.
"Simultaneous Measurement of Size & Velocity of Bubble or Drops: An New Optical Technique", Raphael Semiat & A. E. Dukler, AIChE Journal, vol. 27, No. 1, Jan., 1981.
"Instrument for Velocity & Size Measurement of Large Particles", Gabriel Laufer, Applied Optics, vol. 23, No. 8, Apr. 15, 1984.
"Fiber-optic Lawer Doppler Anemometer with Bragg Frequency Shift Utilising Polarisation-Preserving Single-Mode Fiber" by Knuhtsen et al. J. Phys. E. Sci. Instrum., vol. 15, 1982 printed in Gr. Britain.

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