图面的简单说明:图面为本发明的重要部分的断面斜视图。本发明的详细说明:本发明是一种跳汰机的自动控制装置。当分选产品刚从溢流堰流出时,利用放射性同位素来检测产品的质量,然后根据质量来自动控制溢流量。从前,是在跳汰机的溢流槽前连接一个弧形筛,在这中间设置一个滞留堰,使溢流槽流 Brief Description of the Drawings: The drawing is a cross-sectional oblique view of an important part of the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention is an automatic control device for a jig. When the sorting product has just flowed from the weir, the radioisotope is used to detect the quality of the product, and then the amount of overflow is automatically controlled depending on the quality. In the past, an arc-shaped screen was connected before the overflow tank of the jig, and a stagnant weir was provided in the middle to make the overflow tank flow