Method and apparatus for monitoring the flow of solids

Details Method and apparatus for monitoring the flow of solids Method and apparatus for monitoring the flow of solids

1976-02-02

1977-08-23

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

G01N 2300

Patent

active

040442594

ABSTRACT:
The flow of particulate solids through a screw conveyor or a screw feeder is monitored by passing radiant energy from a source in a generally vertical path into a bed of the solids flowing through the conveyor, receiving by a detector radiation that is not absorbed or scattered by the solids or the conveyor, and transmitting amplified electrical signals from the detector to a recorder. The detector extends parallel to the shaft of the conveyor screw for at least about one pitch length of the screw. The path of radiation from the source to the detector follows a plane that lies between the shaft and the conveyor casing on the lift side of the screw. Cyclic variations in radiation signals as tapered pitch-length segments of material move through the conveyor are averaged mechanically.

REFERENCES:
patent: 2953682 (1960-09-01), Frank et al.
patent: 3518425 (1970-06-01), Gruenwald

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