Particle size distribution measuring apparatus

Details Particle size distribution measuring apparatus Particle size distribution measuring apparatus

1985-03-22

1988-04-05

Gruber, Felix D.

Boots, shoes, and leggings

738655, 356335, G01N 2302, G01N 1504, G06F 1542

Patent

active

047363118

ABSTRACT:
An apparatus for measuring the size distribution of particles by making use of centrifugal force field, comprising a mechanism for making a suspension revolve, an optical unit for detecting a light absorption by the suspension, and a micro-computer. The suspension suspends test particles whose size distribution is to be measured. The optical unit measures a time-dependent particle concentration variation due to the particle movements forced in a centrifugal force field produced by the revolution of the suspension. The micro-computer is provided with a memory for storing equations to obtain the size distribution of particles from the measured particle concentration variation and equations for correcting adverse effects by non-parallel particle movements in a centrifugal force field, to give a particle size distribution free from the error arising from the non-parallel movements of particles.

REFERENCES:
patent: 4318180 (1982-03-01), Lundquist et al.
patent: 4478073 (1984-10-01), Holsworth et al.
patent: 4488248 (1984-12-01), Okada et al.
Shozo Yano et al., "The Particle Size Analyzer with Built-In Microcomputer", Shimadzu Review, vol. 38, No. 3 (1981), pp.207-215.

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