| 摘要 |
measuring a frequency before a roller passes a weight sensor; confirming the frequency difference, and indicating error if there is no frequency difference during ten seconds; calculating the frequency difference when it is generated; storing the frequency difference value in a memory; confirming that the number of measuring times is three and if so, proceeding to the next step, and if not, returning to the second step; calculating the maximum and minimum values of the number of times measured, calculating the mean value of the number of measuring times; confirming the degree of eccentricity compensation according to the maximum and minimum values; determining compensation value according to the degree of eccentricity, obtaining a compensation mean value by adding the mean value to the compensation value; and obtaining the weight by multiplying the compensation mean value by another compensation constant and adding another compensation constant to it.
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