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1. 发明授权

US4906165A Flow meter for a positive displacement pump 失效
标题翻译：用于容积式泵的流量计
公开(公告)号：US4906165A
公开(公告)日：1990-03-06
申请号：US242700
申请日：1988-09-09
申请人： Ronald L. Fox , Scott A. Amundsen
发明人： Ronald L. Fox , Scott A. Amundsen
IPC分类号： G01F1/00 , G01F1/52 , G01F3/38
CPC分类号： G01F3/38 , G01F1/007 , G01F1/52 , Y10T137/7303
摘要： A flow meter for use with a fluid source includes a chamber of known volume, and level sensors for detecting fluid boundaries at either end of the known volume. A valve between the fluid source and chamber is opened at a defined time until fluid level within the chamber rises above the upper sensor, whereupon the valve is closed. As the fluid level falls past the upper sensor a second time level is measured, with both time intervals being terminated as the level falls to the lower level sensor. The average flow rate as the fluid falls between the two sensors is calculated by a computer, and the total volume is then calculated using the longer measured time interval. Flow rates over long time periods can be accurately measured.
摘要翻译：与流体源一起使用的流量计包括已知体积的腔室和用于检测已知体积的任一端处的流体边界的液位传感器。流体源和腔室之间的阀门在规定的时间内打开，直到腔室内的液位升高到上传感器上方，于是阀门关闭。当液位下降超过上传感器时，测量第二时间水平，两个时间间隔在水平下降到较低水平传感器时终止。通过计算机计算流体落在两个传感器之间的平均流速，然后使用更长的测量时间间隔来计算总体积。可以精确测量长时间的流量。

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