Method and apparatus for dynamically check weighing
AssigneeSartorius AG
InventorAlfred KLAUER
Life of this patent
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Abstract
A method and an apparatus for dynamically checking the weight of objects (18a-c) which are guided across a weight-sensitive zone (14) of a weighing device (12) at an adjustable conveying rate by a conveying mechanism (20a-c). At regular intervals, the weight-sensitive zone (14) supplies individual measured weight values (E1, . . . , En) from which resultant weight values are derived in a digital evaluation unit (16) by averaging. The evaluation unit (16) includes a plurality of cascaded averaging filters (24a-e) which have different filter lengths that are varied by a common scaling factor depending on the conveying rate.
Claims14
A method for dynamically checking weights of objects, comprising:
- conveying the objects with a conveying mechanism at an adjustable conveying rate over a weight-sensitive zone of a weighing mechanism;
- from the weight-sensitive zone, supplying individual measured weight values at regular intervals, and deriving resultant weight values by averaging the measured weight values in a digital evaluation unit;
- and
- in the evaluation unit, varying respective filter lengths of a plurality of cascaded averaging filters by a common scaling value in accordance with the conveying rate.
An apparatus for dynamically checking weights of objects, comprising
- a weighing mechanism with a weight-sensitive zone,
- a conveying mechanism which conveys the objects at an adjustable conveying rate over the weight-sensitive zone of the weighing mechanism,
- wherein the weight-sensitive zone is configured to supply individual measured weight values at regular intervals, and
- a digital evaluation unit configured to derive resultant weight values by averaging, wherein the evaluation unit comprises a plurality of cascaded averaging filters of different filter lengths, and a filter length adjuster configured to vary the filter lengths by a common scaling value in accordance with the conveying rate.
Dependencies are inferred from the claim text.