Weighing device, in particular multiple-track weighing device

Abstract

The invention concerns a weighing device comprising a plurality of weighing cells (3) which are mechanically rigidly interconnected and which have respectively a load sensor (7) capable of being biased by a load and having a predetermined load inserting direction. The inventive weighing device also comprises at least one acceleration sensor (9) for detecting at least one disturbing acceleration quantity, as well as at least one evaluating unit whereto are transmitted the weight signals generated by the weighing cells (3) and the disturbance signals generated by the acceleration sensors (9). The evaluating unit is configured such that, by using a predetermined rule for each weighing cell (3), a disturbance signal of the acceleration sensor (9) is deduced, based on the geometrical location of the relevant weighing cell (3), relative to the geometrical location of the acceleration sensor (9),respectively a correcting quantity which takes into account the influence, operating at the geometrical location of the relevant cell (3), of the quantity of the disturbing acceleration. The weight signal is processed, assigned with the disturbing acceleration quantity, of the relevant weighing cell (3) digitally or by combination with the correcting quantity, so as to practically compensate for the influence of the disturbing acceleration quantity on the weight signal.

Description

technical field [0001] The invention relates to a weighing device comprising a plurality of weighing units, by means of which a plurality of parallel weighing processes can be completed. Such a multi-track weighing device is capable of high-frequency measurements and can be used, for example, in the pharmaceutical industry for weighing objects with a small mass, in particular tablets, granules, etc. Background technique [0002] In order to keep the number of weighings per unit time as high as possible, it is not possible to use a device that processes the measurement signal with a low-pass filter with a lower cut-off frequency. Although this low-pass filter may be able to improve the accuracy of weighing, especially to meet the accuracy required by the pharmaceutical industry, however, the oscillation process may last too long, resulting in the failure to complete the necessary number of weighings per unit time . [0003] Such multi-track weighing devices equipped with a ...

AI Technical Summary

Problems solved by technology

[0008] This multi-track weighing system has the disadvantage that it cannot be guaranteed to compensate for disturbing accelerations with sufficient accuracy for those disturbing accelerations that do not act on the individual weighing cells in the same way, resulting in those generated, corrected The weight signals of the individual weighing units produce unacceptable errors in some cases

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