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1.发明授权
公开(公告)号：US5828056A
公开(公告)日：1998-10-27
申请号：US742708
申请日：1996-11-01
CPC分类号： G01V8/22
摘要： A photodetector is provided with two light sources and a light sensitive component. The use of two light sources significantly reduces the opportunity of a surface feature, or abnormality, from focusing light back toward the light sensitive component in a manner that could possible cause the photodetector to misinterpret the intensified light as being indicative of the absence of an object in the detection zone. The light sources and light sensitive component can be arranged along an axis which is either parallel to the path of the objects to be detected or perpendicular to their path.
摘要翻译： 光电检测器设有两个光源和一个光敏元件。 使用两个光源显着地降低了表面特征或异常的可能性，从而将光聚焦到光敏部件的方式可能导致光电检测器误解强化光作为指示不存在物体 在检测区。 光源和光敏部件可以沿着与被检测物体的路径平行或垂直于其路径的轴线布置。
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2.发明授权Photoelectric device with capability to change threshold levels in response to changing light intensities 失效具有响应于光强度变化而能够改变阈值水平的光电装置
公开(公告)号：US5496996A
公开(公告)日：1996-03-05
申请号：US378134
申请日：1995-01-24
申请人： Kenneth F. Barnes , Hongzhi Kong
发明人： Kenneth F. Barnes , Hongzhi Kong
CPC分类号： G01V8/10 , G01N2033/0081
摘要： A photoelectric sensor is provided with the capability of calculating a threshold magnitude based on a maximum light intensity received by a light sensitive device. The maximum value of the light intensity is determined during a preselected period of time when no object is blocking the path of a light beam. A second threshold magnitude is used to assist the present invention in determining the leading edge and trailing edge of a transparent object. The values of the first and second threshold magnitudes are updated dynamically as bottles pass through the path of the light beam. This permits the photoelectric sensor to react to changes in light intensity without providing false signals of bottles within the light path or missing bottles that are within the light path.
摘要翻译： 光电传感器具有基于由光敏装置接收的最大光强度来计算阈值大小的能力。 在没有物体阻挡光束的路径的预选时间段期间确定光强度的最大值。 第二阈值幅度用于帮助本发明确定透明物体的前缘和后缘。 当瓶子通过光束的路径时，第一和第二阈值的值被动态地更新。 这允许光电传感器对光强度的变化作出反应，而不会在光路内的瓶子的错误信号或在光路内的丢失的瓶子中。
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3.发明授权
公开(公告)号：US5400206A
公开(公告)日：1995-03-21
申请号：US98484
申请日：1993-07-27
申请人： Kenneth F. Barnes , Jimmy Yee
发明人： Kenneth F. Barnes , Jimmy Yee
CPC分类号： H02H3/087
摘要： An overcurrent protection circuit is provided with a counter which permits a preselected number of reinitiations of current following the detection of an overcurrent condition. Each stoppage of current in response to the detection of an overcurrent condition is followed by a predetermined time delay and a subsequent reinitiation of current. After the predetermined number of reinitiations, current is permanently stopped from flowing between first and second circuit points until a manual reset occurs.
摘要翻译： 过电流保护电路设有一个计数器，该计数器允许在检测到过电流状态之后预先选择数量的电流。 响应于过电流状况的检测，电流的每个停止都遵循预定的时间延迟和随后的电流重新启动。 在预定次数的重新启动之后，电流永久地停止在第一和第二电路点之间流动，直到发生手动复位。
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