Particle flow monitor and metering system

Details Particle flow monitor and metering system Particle flow monitor and metering system

1997-11-05

2000-02-08

Font, Frank G.

Optics: measuring and testing

For optical fiber or waveguide inspection

356339, G01N 2100

Patent

active

060233249

ABSTRACT:
A method and apparatus for determining the flow of abrasive particles in a micro abrasive blasting machine. The machine propels abrasive particles using a carrier stream of compressed gas, typically air, nitrogen or carbon dioxide. The machine mixes the abrasive particles such as aluminum oxide, glass bead, sodium bicarbonate, or silicon carbide, with the carrier gas stream. This mixture is then directed at a work piece through a hard nozzle, typically carbide or sapphire. The apparatus operates on a particle flow detection area upstream of the nozzle through which the carrier stream containing the abrasive particles flows. The apparatus analyzes the fluctuations in the optical transmissivity of the carrier stream containing the abrasive particles to determine the flow of the abrasive particles in the carrier stream.

REFERENCES:
patent: 3781112 (1973-12-01), Groner et al.
patent: 5047963 (1991-09-01), Kosaka

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