Patent ID: 6034334
Filing Date: 2000-03-07
Classification: G01G

Abstract:
A combinational weighing machine comprising:a plurality of weighing units set on a same floor and adapted to weigh article batches and output weight signals indicative of the measured weights thereof;a control unit for carrying out combinational calculation of said weight signals and causing said article batches to be discharged from a selected combination of said weighing units according to a predetermined criterion;floor vibration calculating means for calculating vertical displacements of said floor at positions of said weighing units by determining a planar vibration mode of said floor determined from vibration components of the weight signals outputted from a smaller number of non-participating ones of said weighing units which did not participate in the preceding cycle of combinational calculation by said control unit, said smaller number being smaller than the number of said weighing units participating in said combinational calculation;floor vibration correcting means for subtracting the vertical displacements of said floor calculated by said floor vibration calculating means from the weight signals from participating ones of said weighing units that participated in said combinational calculation by said control unit;a memory device, said control unit causing to store in said memory device, for a combination of said weighing units, only combination patterns of said non-participating weighing units that reduce the difference between calculated vertical displacements of said floor obtained by said floor vibration calculating means and real vertical displacement of said floor; andselecting means for selecting one of said combination patterns from said memory means for said combination of weighing units.