| 摘要 |
<p>A control device for displacement of a separator wall for a grain classifier in which a mixture of grain particles having different reflectance or transmittance is separated by a grain classifying plate having a coarse surface. The separator wall is provided movably along one side of the grain classifying plate. Provided on one or both sides of outlets of the grain classifying plate are detector devices consisting of light-receiving elements and light-emitting diodes. The mixing rate of grain flowing down through the outlets is detected by the detector devices. Control signals from the detector devices are sent, via a control circuit, to a motor connected to the separator wall so as to move the separator wall for positioning it at the boundary of the different grain particles. </p> |
