Displacement error correction in sorting systems
AssigneeGeneral Mining Union Corporation Limited
InventorsRolf C. Bohme, Max M. Lazerson
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Abstract
In radiometric sorting a method of compensating for the count recorded by a detector for an ore particle which is displaced from the center line of the detector. The compensation is effected by applying one of a plurality of calibration factors to the detector count. The calibration factors are statistically determined and are dependent on the measured displacement and optionally on at least one of the shape, height, volume or mass of the particle.
Claims8
A method of compensating for the lateral displacement of a particle from a reference line related to at least one detector which is responsive to a desired property in the particle and which produces an output signal which is dependent on the degree to which the particle possesses the property includes the steps of obtaining a measure of the lateral displacement of the particle from the reference line, and applying to the output signal a correction factor which is dependent on the measure of the lateral displacement.
A method of sorting particles which includes the steps of causing the particles to move in line spaced from one another sequentially past a plurality of in-line detectors, the detectors being responsive to the presence of a desired property in the particles and each producing, for each particle, an output signal which is dependent on the degree to which the property is present in the particle, and, for each particle, accumulating the output signals of the detectors, obtaining a measure of the displacement of the particle from the centre line of the detectors, and applying to the accumulation of the output signals a correction factor which compensates for the displacement of the particle from the centre line.
Dependencies are inferred from the claim text.