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1. 发明授权

US4487601A Bubble detector circuit with variable reference level 失效
标题翻译：气泡检测器电路具有可变参考电平
公开(公告)号：US4487601A
公开(公告)日：1984-12-11
申请号：US505652
申请日：1983-06-20
申请人： William T. Lindemann
发明人： William T. Lindemann
IPC分类号： A61M1/36 , A61M5/14
CPC分类号： A61M1/3626 , A61M2205/3375 , Y10S128/13
摘要： A bubble detector system is provided which dynamically responds to changes in energy transmission efficiency. The output of a detector is coupled to a dynamic reference level circuit, which develops a reference level that changes slowly in a time-varying manner with changes in the energy level received by the detector. The output of the detector is also coupled to a bubble detector circuit which produces a detection signal that changes rapidly when gas is present between an energy source and the detector. The detection and reference levels are compared to detect the presence of gas in the flow of fluid between the energy source and the detector.
摘要翻译：提供了一种动态响应能量传输效率变化的气泡检测器系统。检测器的输出耦合到动态参考电平电路，其产生随着由检测器接收的能量水平的变化以时变方式缓慢变化的参考电平。检测器的输出还耦合到气泡检测器电路，其产生当在能量源和检测器之间存在气体时快速变化的检测信号。比较检测和参考水平以检测能量源和检测器之间的流体流中气体的存在。

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