公开(公告)号：US3738484A

公开(公告)日：1973-06-12

申请号：US3738484D

申请日：1971-03-15

Applicant: MANDREL INDUSTRIES

Inventor： HOOVER M ,  LONG W

IPC: B07C5/342 ,  B07C1/04

CPC classification number: B07C5/366 ,  B07C5/3425 ,  Y10S209/908

Abstract: A number of steeply inclined tapered slides are arranged for gravity assisted singulation and alignment of items such as rice grains that are introduced at the top from vibrating chutes that are gently inclined in the opposite direction. The chutes extend from a common vibrating feed tray and have adjustable entrance gates to equalize the flow rates of the items. A stationary hopper supplies the feed tray through a flexible coupling. At the bottom of each slide, a photoelectric viewer is arranged to operate an ejector for diverting grains having dark spots. A variable background is provided and is adjusted so that the signal induced thereby is identical to that of the mid-portion of an acceptable grain. Light sources are positioned both above and below the photoelectric means so as to provide extra illumination for the leading and trailing ends of each grain, thus to avoid spurious signals similar to those induced by dark spots but caused by the rounded ends of acceptable grains.

Abstract translation: 一些陡峭倾斜的锥形滑块被布置用于重力辅助分离和对准诸如从在相反方向上轻轻倾斜的振动滑槽顶部引入的米粒。 滑槽从共同的振动进料盘延伸，并具有可调节的入口门，以均衡物品的流速。 固定料斗通过柔性联轴器供给进料盘。 在每个载玻片的底部，布置一个光电观察器来操作喷射器以转移具有黑点的颗粒。 提供可变背景并进行调整，使得由此引起的信号与可接受的颗粒的中间部分相同。 光源位于光电装置的上方和下方，以便为每个晶粒的前端和尾端提供额外的照明，从而避免类似于由黑点引起的杂散信号，但是由可接受的晶粒的圆形端引起。