公开(公告)号：US20070191990A1

公开(公告)日：2007-08-16

申请号：US11503873

申请日：2006-08-11

申请人： Hao Duan ,  Aaron Tint ,  Christophe Ellec

发明人： Hao Duan ,  Aaron Tint ,  Christophe Ellec

IPC分类号： G05D7/00

CPC分类号： G01F1/667 ,  G01F1/74 ,  G01F25/0007 ,  G01N2291/02836 ,  G01P5/245 ,  G01P5/247 ,  G05D7/0635

摘要： Systems and methods for liquid flow sensing and control for use with a variety of different types of liquid flow measurement and control systems. The liquid flow sensor system senses a flow signal indicative of the flow rate of the liquid flowing in a sensor conduit and analyzes the flow signal to determine, by detecting characteristic changes in the signal, whether a bubble is present in the sensor conduit. Where the system determines that a bubble is present, it may generate an alarm signal indicative of the presence of the bubble. A flow control system incorporating the flow sensor as a feedback source may respond to the detection of a bubble by temporarily freezing the flow control parameters until the bubble has exited the sensor conduit. The flow control system can implement procedures for clearing a bubble from the sensor conduit where the system detects that the bubble has become stuck.

摘要翻译： 用于液体流量检测和控制的系统和方法，用于各种不同类型的液体流量测量和控制系统。 液体流量传感器系统感测指示在传感器导管中流动的液体的流速的流动信号，并分析流量信号，以通过检测信号中的特征变化来确定传感器导管中是否存在气泡。 在系统确定存在气泡的情况下，其可以产生指示气泡存在的报警信号。 结合流量传感器作为反馈源的流量控制系统可以通过临时冻结流量控制参数直到气泡已经离开传感器导管来响应气泡的检测。 流量控制系统可以实现从系统检测到气泡已经卡住的传感器导管清除气泡的过程。

公开(公告)号：US20050288873A1

公开(公告)日：2005-12-29

申请号：US10878974

申请日：2004-06-28

申请人： Nelson Urdaneta ,  Aaron Tint ,  Hao Duan ,  Eric Redemann ,  Christopher Wacinski

发明人： Nelson Urdaneta ,  Aaron Tint ,  Hao Duan ,  Eric Redemann ,  Christopher Wacinski

IPC分类号： G01F1/00 ,  G01F1/66

CPC分类号： G01F1/667 ,  G01F1/66 ,  G05D7/0635 ,  Y10T137/7761

摘要： An ultrasonic flow meter includes a conduit, a first ultrasonic transducer, a second ultrasonic transducer, and a controller. The first ultrasonic transducer is disposed at a first position about a first portion of the conduit to transmit a first ultrasonic signal and to receive a second ultrasonic signal. The second ultrasonic transducer is disposed at a second position about a second portion of the conduit that is spaced apart from the first position along a length of the conduit to transmit the second ultrasonic signal and to receive the first ultrasonic signal. The controller is configured to cross-correlate the first and second received ultrasonic signals and generate a resulting time-domain signal, analyze the resulting time-domain signal to determine a difference in transit time between the first and second received ultrasonic signals, and calculate a rate of flow of a fluid in the conduit based upon the determined difference.

摘要翻译： 超声波流量计包括导管，第一超声换能器，第二超声波换能器和控制器。 第一超声换能器设置在围绕导管的第一部分的第一位置处，以传输第一超声波信号并接收第二超声波信号。 所述第二超声波换能器设置在所述导管的第二部分的第二位置处，所述第二部分沿着所述导管的长度与所述第一位置间隔开以传输所述第二超声波信号并接收所述第一超声波信号。 所述控制器被配置为使所述第一和第二接收的超声波信号互相关，并产生所得的时域信号，分析所得到的时域信号以确定所述第一和第二接收的超声波信号之间的传播时间差，并且计算 基于所确定的差异，导管中流体的流速。