Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1982-02-11
1985-02-19
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250577, 356414, 210 94, G01N 1506
Patent
active
045007934
ABSTRACT:
An apparatus for remotely monitoring the color distribution of two materials charged in a treating column by moving a color sensor along a viewing window of the column. The color sensor moving along the viewing window projects a light onto the materials in the treating column and receives the reflected light for conversion into a reception signal. A comparator compares the reception signal with a reference signal representing a standard color of the materials in the column to produce a digital color difference signal. The digital color difference signal is sampled and distributed to indicator lamps in accordance with position signals from the of positions sensing means which senses the passage of the color sensor by each of a plurality position. Thus, the indicator lamps provide a remote display of the color distribution of the materials along the viewing window. Further, operation processing means is provided which checks the inversion frequency of samples of the color difference signal and the inversion position or positions thereof and selectively produces one of a plurality of control signals each indicating how far the separation process has progressed.
REFERENCES:
patent: 3388258 (1968-06-01), Grant
patent: 3429807 (1969-02-01), Burgess
patent: 3492396 (1970-01-01), Dalton et al.
patent: 3564266 (1971-02-01), Klotz, Jr.
patent: 3634229 (1972-01-01), Stanley, Jr.
patent: 4123227 (1978-10-01), Heim et al.
Brophy J.
Ebara Corporation
Nelms David C.
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