| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure a quantitative ratio, when objects to be sorted are grouped into a plurality of groups with identical properties, of the respective objects, and automatically sort them. <P>SOLUTION: An open loop control for determining the threshold value corresponding to an object value on the basis of analysis of distribution state of the property provided by measurements for sorting, and a closed loop control for correcting an error from the object are combined. A control gain adapted to the object ratio is provided to the closed loop control and the threshold value is restricted, and thereby, a stable control can be provided. <P>COPYRIGHT: (C)2004,JPO |
