Device for determining the characteristics of particles in suspe

Details Device for determining the characteristics of particles in suspe Device for determining the characteristics of particles in suspe

1990-04-11

1992-02-11

Willis, Davis L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

162263, 356336, 356343, 356338, 250576, 250225, G01N 1506, D21F 706

Patent

active

050878239

ABSTRACT:
A device for determining the characteristics of particles in suspension in a liquid, comprising a sampling device (2) for injecting samples of particles; a fractionator (3) for sorting those particles as a function of their length; an optical measurement cell (4) which receives the output of the fractionator, and a programmable controller (6) for calculating the values of the intensities and combinations of those values in the various directions of the optical radiation. The optical measurement cell includes a laser for transmitting polarized, coherent light through the particles in suspension and for collecting the light diffracted in various directions.

REFERENCES:
patent: 3873416 (1975-03-01), Forgals et al.
patent: 4276119 (1981-06-01), Karnis et al.
patent: 4318180 (1982-03-01), Lundquist et al.
patent: 4692210 (1987-09-01), Forrester
patent: 4758308 (1988-07-01), Carr
patent: 4838692 (1989-06-01), Brenholdt
Advances in Instrumentation, vol. 30, Part II, Continuous Particle Size Analysis and Grinding Control, 1975.
Tappi, vol. 53, No. 7, Fractionation of Fiber Suspensions by Liquid Column Flow, Jul. 1970.

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