| 摘要 |
PURPOSE:To eliminate the error in counting the number of parts by a scale by updating the memory and a reference weight every time the number of the parts is counted, and judging the crtical region at the time of rounding the counted number. CONSTITUTION:When an operating part 5 specifies parts numbers, a central processing unit CPU 3 reads the reference weight, which is determined by dividing the result of the detection of the weight of ten pieces and the like by the number of pieces, out of a built-in memory part (c). The reference weight is applied to an operating part (a). The weight of articles 6, whose number is unknown, is detected by a weight detector 1 and applied to said operating part (a) through an A/D converter and an I/O interface part (b). The detected weight is divided by the reference weight and the number of pieces is judged. When the fraction of the division is larger than 0.3 and smaller than 0.7, the CPU judges that the region is the critical region at the time of rounding, and displays the magnitude of dispersion on a display device 4. The change of the number of articles measured by the detector 1 is instructed. Meanwhile the CPU updates the content of the memory part, with the weight, which is obtained by dividing the detected weight by the number determined by the operation, as the new reference weight. Thus, errors in the total weight of parts, errors in the reference weight of one part, and errors in rounding in division are eliminated, and the errors in counting the number of parts by a scale becomes zero. |
