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Proceedings Paper

On-Line Volume Measurement Of Bulk Materials
Author(s): J. F. Claridge; D. J. Purll
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Paper Abstract

The authors will describe a technique initially developed for automatic inspection and gauging of extruded products which has more recently been applied to on-line volume measure-ment of bulk materials carried on conveyor belts. The technique involves a light-sectioning optical system in which a straight edge of light is projected across the direction of flow. When viewed from a different angle, this edge is seen to follow the external profile of the material, and this view is imaged onto a two-dimensional photodiode array. Processing of the array output signal with an electronic system including a microprocessor enables the instantaneous cross-sectional area of the load to be computed, since the underside profile formed by the empty conveyor belt is known. Integration of these measurements over a given length of conveyor movement yields a measurement which is proportional to volume.

Paper Details

Date Published: 1 January 1978
PDF: 8 pages
Proc. SPIE 0145, Industrial Applications of Solid State Image Scanners, (1 January 1978); doi: 10.1117/12.956596
Show Author Affiliations
J. F. Claridge, Sira Institute Ltd (UK)
D. J. Purll, Sira Institute Ltd (UK)

Published in SPIE Proceedings Vol. 0145:
Industrial Applications of Solid State Image Scanners
David J. Purll, Editor(s)

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