Weighing scales – Processes
Patent
1983-06-22
1985-05-14
Goldberg, E. A.
Weighing scales
Processes
177 25, 177 50, G01G 900, G01G 1922, G01G 19413, G01G 19417
Patent
active
045166439
ABSTRACT:
A combinatorial weighing method and apparatus in which weight data from N-number of weighing machines containing articles are combined to obtain an optimum combination of weighing machines giving a total combined weight value of articles equal to a preset value Wa or closet to the preset value Wa within preset allowable limits, and in which the articles are discharged from the obtained optimum combination of weighing machines. The method includes starting combinations with i as the initial number of weighing machines in each combination, wherein i represents the number of weighing machines which tends to afford the optimum combination more readily than other numbers of the weighing machines. Combinations which select the i-number of weighing machines from the N-number of weighing machines, are generated continuously and it is determined whether the total weight value of each combination machine falls within the preset allowable limits. A combination which is within the preset allowable limits is stored, and articles are discharged based on the stored optimum combination. The initial value of i is set to N/2 when N is even, to (N/2).+-.0.5 when N is odd, or to a value obtained by performing the following operation: ##EQU1## where Wi (i=1, 2, . . . , N) represents the weight of article batches supplied to each of the weighing machines. For each total weight value of a certain combination that is obtained, the value is ranked as being underweight, proper or overweight, the weight values are counted rank by rank, and the quantity of articles suppled to the weighing hoppers is controlled based on the counted value in each rank. When an optimum combination is not found with the initial number of weighing machines, i is updated based on the counted value in each rank, and processing for selection of an optimum combination is re-executed.
REFERENCES:
patent: 3974888 (1976-08-01), Murakami et al.
patent: 4341274 (1982-07-01), Hirano et al.
patent: 4397364 (1983-08-01), Hirano
patent: 4416341 (1983-11-01), Hirano
Foster Patrick W.
Goldberg E. A.
Kabushiki Kaisha Ishida Koki Seisakusho
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