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22. 发明授权

US4366384A Air bubble detector 失效
标题翻译：气泡探测器
公开(公告)号：US4366384A
公开(公告)日：1982-12-28
申请号：US160664
申请日：1980-06-18
申请人： Lynn E. Jensen
发明人： Lynn E. Jensen
IPC分类号： A61M5/36 , G01N15/06
CPC分类号： A61M5/365
摘要： Air bubbles in a transparent intravenous solution conduit are detected, regardless of whether the solution is opaque or clear, by directing a light source at the conduit and detecting light shining through the solution with a first light sensor while detecting light reflected from the interior wall of the conduit with a second light sensor. If liquid is present in the conduit, whether clear or opaque, one sensor will see a low light level while the other sees a high level. If air is present, both sensors see a high light level. By EXCLUSIVE-OR'ing the outputs of the two sensors, a logic signal is obtained which is high only when the presence of liquid in the conduit is being detected. Means using two sensor assemblies spaced axially along the conduit, and a counter associated with each, are also provided to allow passage of minor air bubbles, and to provide a backup signal representative of a predetermined volume of air passing either assembly independently of the other.
摘要翻译：检测透明静脉内溶液导管中的气泡，而不管溶液是不透明的还是透明的，通过在管道处引导光源并且通过第一光传感器检测照射通过溶液的光，同时检测从内壁反射的光导管与第二个光传感器。如果导管中存在液体，无论是透明还是不透明，一个传感器将会看到一个低的亮度，而另一个传感器看到一个高的水平。如果存在空气，两个传感器都会看到较高的亮度。通过EXCLUSIVE-OR'两个传感器的输出，获得一个逻辑信号，只有当检测到导管中液体的存在时才会很高。使用沿着管道轴向间隔开的两个传感器组件和与每个传感器相关联的计数器的装置也被设置成允许小气泡的通过，并且提供表示通过任一组件的预定体积的空气而不是另一个的备用信号。

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