Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Signalling – indicating – or display means
Patent
1985-10-15
1988-01-12
Reeves, Robert B.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Signalling, indicating, or display means
209581, 209587, 364571, 364579, B07C 5342, G05B 2302
Patent
active
047185589
ABSTRACT:
An optical sorter for beans and grains, including a detector providing a signal pulse for each of the sampled objects, and a signal processor for receiving and amplifying the pulse. The signal processor measures the amplitude of the amplifier pulse and compares the amplitude value to a predetermined standard value. The pulses are counted up to a predetermined count, and the number of pulses having an amplitude value above the predetermined standard value out of the total number of counted pulses, is counted. The counted number of pulses having an amplitude above the standard value is compared to a preselected number, and the gain of the signal processor is adjusted with a negative feedback signal to adjust toward the preselected number, the counted number of pulses in the next count having an amplitude value at the predetermined standard value. The sorter uses the peak amplitude value of the pulse which is determined by taking a derivative of the signal and determining the zero crossing time of the derivative signal.
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Reeves Robert B.
Wacyra Edward M.
Xeltron, S.A.
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