Optical granulometry process and devices for broad measuring ran

Optics: measuring and testing – For size of particles – By particle light scattering

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364525, 250574, G01N 1502

Patent

active

049290797

ABSTRACT:
A granulometry device embodying the invention comprises a measuring probe and a micro-computer. The micro-computer provides digital filtering on a first discrete distribution function that is calculated by statistical inversion from a plurality of radiation measurements supplied by the probe and a theoretical radiation coefficient matrix thereby determining, after an iterative calculation, an optimum relation which should be satisfied by the nodes defining a discrete distribution function so as to offer a maximum correlation with uncertainty measurements. All the discrete distribution functions satisfying this relation are then calculated by statistical inversions. The mirco-computer provides an optimum statistical evaluation of the distribution of particles in a gas or liquid fluid.

REFERENCES:
patent: 4274741 (1981-06-01), Cornillault
patent: 4622642 (1986-11-01), Bajard et al.
Int'l. Conf. on Liquid Atomisation and Spray System: "Performance Compari of Malvern Instruments Laser Differaction Drop Size Analyzers", by E. S. Hirleman et al., ICLASS 85, pp. IVA/3/1-IVA/3/14.

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