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1. 发明授权

US6140662A Sensing system and method 失效
标题翻译：感应系统和方法
公开(公告)号：US6140662A
公开(公告)日：2000-10-31
申请号：US226978
申请日：1999-01-08
申请人： Ah Peng Lim , Baskar Parthasarathy
发明人： Ah Peng Lim , Baskar Parthasarathy
IPC分类号： B65H43/06 , B41J11/00 , B41J13/10 , G01B11/02 , G01N21/00
CPC分类号： B41J11/0075 , B41J13/10
摘要： A sensing system is used to sense when a stack of sheet material reaches a critical height. A light beam is shone onto a region on the surface of the stack to form a lighted area. Changes in the height of the stack of sheet material results in changes in size of the lighted area of the beam shining on the surface of the stack. A light detector monitors a zone on the stack surface in which the amount of light being monitored as shining on the zone varies in accordance with changes in size of the lighted area. The detection system detects when the lighted area has reached a predetermined size by detecting when the light shining on the zone has reached a predetermined point. The system then provides an indication that the stack surface has reached a critical height, in other words that the stack surface has reached a critical distance from the light source.
摘要翻译：感测系统用于感测堆叠的片材何时达到临界高度。光束照射在堆叠表面上的区域上以形成点亮区域。片材堆叠的高度的变化导致在堆叠表面上照射的光束的照明区域的尺寸的变化。光检测器监测堆叠表面上的区域，其中根据照明区域的尺寸的变化，被监视的光量在该区域上发光。检测系统通过检测在区域上照射的光到达预定点的时间来检测点亮区域何时达到预定的尺寸。然后，系统提供堆叠表面已经达到临界高度的指示，换句话说，堆叠表面已经达到与光源的临界距离。

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