Method and device for weighing products
AssigneeMettler-Toledo Garvens GmbH
InventorsHarald Beck, Rolf Kreimeyer
Life of this patent
Estimating the term…
Abstract
The invention relates to control scales whereon the weight of products (14) is determined in a dynamic manner during the transport thereof on a weighing strip (4) by means of filtering weight values detected during said transportation. According to the invention, said scales comprise an optimisation device which automatically determines the optimum length of filtering.
Claims10
Method for weighing products, the method comprising individually feeding the products to a measuring interval and conveying the products along the measuring interval, during which weight values are determined at regular intervals, and forming mean values and variances from the weight values detected on a partial interval of the measuring interval to determine the weighing result, further comprising determining, for a number of different partial intervals each, the variance of the detected weight values and selecting the partial interval having the smallest variance for determining the weighing result.
Device for weighing products, the device comprising a belt conveyor (4) that serves as a measuring interval, to which the products are individually delivered and on which the products are conveyed in a direction of conveyance;
- further comprising a load cell (13) on which the belt conveyor (4) is supported and which detects weight values at regular time intervals;
- a sensor device (17) which is coordinated with the belt conveyor (4) and detects the leading end (18) and the trailing end (19) of each conveyed product (14) that passes through its detection zone;
- and a filtering device and a selection device assigned to the filtering device for determining the weighing result on the basis of mean values and variances formed from weight values detected on a partial interval;
- wherein, to determine the weighing result, the partial interval with the smallest variance is selected by the selection device from among a number of different partial intervals, for each of which the variance of the weight values detected on it is formed.
Dependencies are inferred from the claim text.