Measurement of flow of particulate material by sensing the shado

Details Measurement of flow of particulate material by sensing the shado Measurement of flow of particulate material by sensing the shado

1976-01-27

1978-01-24

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250577, H01J 3912, G01N 2126

Patent

active

040705757

ABSTRACT:
A portion of a beam of light directed towards a flow of particulate material is interrupted with an edge such that the edge casts a shadow across the material. The shadow profile is sensed and a signal indicative of the sensed shadow profile is derived and monitored as a function of flow velocity to determine the volume of flow.

REFERENCES:
patent: 2604809 (1952-07-01), Mitchell
patent: 3396280 (1968-08-01), Knudsen
patent: 3815998 (1974-06-01), Tietze
patent: 3819940 (1974-06-01), Laws
patent: 3917942 (1975-11-01), McCay

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