Weighing scales – Weigher responsive material control – Feed
Patent
1977-04-28
1978-11-21
Miller, Jr., George H.
Weighing scales
Weigher responsive material control
Feed
198502, G01G 1304, B65G 4308
Patent
active
041261968
ABSTRACT:
A scale position compensation means for a conveyor belt material transport system, the system including a conveyor belt having a tail end and a discharge end, belt drive means, and a weight signal generating means. Belt travel signal generating means produce a belt travel signal representing the change of belt position. The weight signal generating means produce a first digital weight signal representing a weight of material associated with a portion of the belt adjacent to a first reference point located between the tail and discharge ends. The scale position compensation means are responsive to the first digital weight signal and the belt travel signal to produce a second digital weight signal representing a weight of material associated with the abovementioned portion of the belt when it is adjacent to a second reference point located between the first reference point and the discharge end. The compensation means comprise a memory for storing the first digital weight signal for a time interval having a duration related to the rate of change of belt position and to the distance between the first and second reference points.
REFERENCES:
patent: 3278747 (1966-10-01), Ohmart
patent: 3303967 (1967-02-01), Munson
patent: 3610908 (1971-10-01), Karosas
patent: 3714401 (1973-01-01), Yano
patent: 3754126 (1973-08-01), Williams, Jr.
patent: 3868643 (1975-02-01), Bullreant
Walker, Robert I. S., Weighfeeders and Direct Digital Control: Feedback and Feedforward, Oct. 1968, Queen's University of Belfast, Dept. of Elec. Engr.
Hyer Frank S.
Karosas Raymond
Hyer Industries, Inc.
Miller Jr. George H.
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