COUNTING SCALE AND LOAD CELL ASSEMBLY THEREFOR

摘要

The invention is directed to a counting scale which implements a load cell assembly (20) for the measurement of weight used in counting calculations. A load cell in such an assembly has a beam structure with beams positioned parallel (42, 45) to each other in at least one plane. Generally, these parallel beams (42, 45) are attached to a stationary base (40) and have sensing means (52) attached between the two beams (42, 45) and the base (40). These sensing means (52) are preferably resonators (52) which have resonant frequencies that vary in response to an applied force on the load cell (20). A controller (200) is included in the assembly to drive these resonators (52), convert their frequency outputs to digital values, and correct for various environmental effects, to obtain an accurate weight measurement for use in the counting scale.