Method of and apparatus for determining the nature of transported material
AssigneeCoal Industry (Patents) Limited
InventorsJohn S. Wykes, Piotr M. Surzyn, Gerard M. Croke, Ian Adsley
Life of this patent
Estimating the term…
Abstract
A coal/stone mixture transported on a conveyor is investigated by subjecting it to two radiation beams of differing energies. In a preferred embodiment, the higher energy radiation is collimated into a pencil beam and the lower energy radiation into a fan beam. Detector shielding prevents substantial interference of close-to-surface reactions within the detector deriving from the higher energy beam with detection of the lower energy beam.
Claims2
A method of determining the nature of transported material, comprising the steps of collimating radiation into two beams by positioning shielding around a source of at least two different energies, a lower of said energies being collimated into a fan beam, and a higher of said energies being collimated into a pencil beam, subjecting the transported material to the beams, detecting with a detector unscattered radiation after passage of the beams through the transported material, and shielding said detector to prevent any substantial interference of close to surface reactions occuring near the detector surface deriving from the relatively higher energy radiation with detection of the lower energy radiation;
- and
- analyzing from the detected radiation the nature of the transported material.
Dependencies are inferred from the claim text.