Electronic counting scale
First Claim
1. An electronic counting scale comprising a weighing tray to be loaded with items whose number is to be counted, a weight measuring means for measuring a gravitational force acting on said items loaded on said tray and for outputting a digital weight value corresponding to said gravitational force, a central processing unit which includes an arithmetic organ for processing said digital weight value according to a predetermined program, a memory for storing various calculating formulae, various calculated values and said predetermined program, said various calculating formulae containing a maximum number calculating formula which gives, in consideration of the weight fluctuations of the items to be counted, a maximum addable number rounded to the nearest whole number for fractions equal to or over 0.5 without giving a counting error, a number displaying means for displaying the number of said items calculated by said arithmetic organ, and an informing means for informing whether an unknown number of items added to an already counted known number of items is equal to or exceeds said maximum addable number calculated according to said maximum addable number calculating formula.
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Accused Products
Abstract
There is disclosed an electronic counting scale provided with means for calculating a maximum addable number of items to be added to an already counted known number of items with an error being eliminated from the counted number of a total items including the added items, said means calculating the maximum addable number on the basis of the standard variation of an average weight estimated from the samples taken from the entire population of the items to be counted.
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Citations
10 Claims
- 1. An electronic counting scale comprising a weighing tray to be loaded with items whose number is to be counted, a weight measuring means for measuring a gravitational force acting on said items loaded on said tray and for outputting a digital weight value corresponding to said gravitational force, a central processing unit which includes an arithmetic organ for processing said digital weight value according to a predetermined program, a memory for storing various calculating formulae, various calculated values and said predetermined program, said various calculating formulae containing a maximum number calculating formula which gives, in consideration of the weight fluctuations of the items to be counted, a maximum addable number rounded to the nearest whole number for fractions equal to or over 0.5 without giving a counting error, a number displaying means for displaying the number of said items calculated by said arithmetic organ, and an informing means for informing whether an unknown number of items added to an already counted known number of items is equal to or exceeds said maximum addable number calculated according to said maximum addable number calculating formula.
Specification