公开(公告)号：US3837486A

公开(公告)日：1974-09-24

申请号：US37780773

申请日：1973-07-09

Applicant: EMHART CORP

Inventor： GARDNER E

IPC: B07C5/36 ,  B07C5/10 ,  G01B21/06 ,  G01B21/20 ,  B07C5/342

CPC classification number: B07C5/10 ,  B07C5/365

Abstract: At least one light beam is directed across a continuously moving conveyor toward a light sensitive device arranged on the opposite side of the conveyor, and circuitry is provided in association with the light sensitive device to provide a ''''diameter'''' pulse proportional in real time to the width or diameter of the article passing along the conveyor. A pulse generator provides a train of pulses proportional in frequency to the speed of the conveyor and hence to the speed of the articles moving thereon. NAND gate means clips the train of pulses providing a series of pulses with a total time span corresponding to the real time duration of the ''''diameter'''' pulse. A counter receives these pulses, and has preset minimum and maximum values, which values when exceeded will generate ''''yes'''' and ''''no'''' pulses to logic circuitry for operation of a reject device downstream of the light beam for removing an article from the line when it does not meet predetermined standards.

Abstract translation: 至少一个光束被引导穿过连续移动的传送器朝着布置在传送器的相对侧上的光敏设备，并且与光敏设备相关联地提供电路以提供实时成比例的“直径”脉冲 物品沿输送机通过的宽度或直径。 脉冲发生器提供频率与输送机速度成比例的脉冲串，并因此提供在其上移动的物品的速度。 NAND门意味着剪切脉冲串，提供一系列脉冲，其总时间跨度对应于“直径”脉冲的实时持续时间。 计数器接收这些脉冲，并且具有预设的最小值和最大值，超出时的值将产生逻辑电路的“是”和“否”脉冲，用于操作光束下游的拒绝装置以从线路中移除物品， 它不符合预定的标准。