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公开(公告)号：US3605741A
公开(公告)日：1971-09-20
申请号：US3605741D
申请日：1969-06-09
申请人： JORDAN L SPENCER
发明人： SPENCER JORDAN L
CPC分类号： A61M5/16886 , A61M5/172 , G01F1/00 , G01F1/20 , G01F1/708 , Y10T137/8342
摘要： THE PRESENT INVENTION DEALS WITH AN IMPROVED METHOD AND APPARATUS FOR MEASURING FLOW IN AN INTRAVENOUS FEEDING SYST EM OR OTHER FLUID FLOW SYSTEM CHARACTERIZED BY ITS LOW FLOW RATE. THE INVENTION UTILIZES THE TRANSIT TIME OR OSCILLATORY FREQUENCY OF A BALL OF FLOAT WHICH MOVES ALONG THE DIRECTION OF FLUID FLOW AND IS RETURNED TO ITS ORIGINAL POSITION BY ACTUATING A MAGNETIC RETURN SYSTEM AS ITS BREAKS A LIGHT BEAM OR OTHER SENSING SYSTEM. THE CYCLE IS REPEATED, WITH THE TRANSIT TIME OR OSCILLATORY FREQUENCY BEING RELATED TO RATE OR FLUID FLOW, AND THUS SERVING TO INDICATE SAME FOR CONTROL PURPOSES. THE FLOW TUBE BALL MEASURING UNIT PREFERABLY TAKES THE FORM OF A DISPOSABLE AND PREFERABLY STERILE INSERT INTO AN INTERVENOUS FEEDING SYSTEM.
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公开(公告)号：US5578763A
公开(公告)日：1996-11-26
申请号：US493622
申请日：1995-06-22
摘要： A flow meter comprises a conduit adapted to conduct a flow of a fluid, a stop in the conduit, and a body that is movably received in the conduit, is normally kept in engagement with the stop by the fluid flow, and has at least a portion of a magnetically responsive material. An electromagnet is located outside the conduit in a position upstream from the stop, relative to the direction of the fluid flow, and has its poles located such as to impose a magnetic force on the magnetically responsive material of the body when it is energized. A ramp current generator energizes the electromagnet so as to progressively increase the magnetic force that it produces until the magnetic force is sufficient to move the body against the fluid flow and attract the body to a position between the poles. A multi-turn sensor coil or a magnetic field sensor detects changes in the magnetic flux field of the electromagnet when the body moves away from the stop and toward the electromagnet and outputs a sensing signal, which in turn initiates the capture of a measurement of the current that resulted in attraction of the body away from the stop against the force of the fluid flow.
摘要翻译： 流量计包括适于引导流体流动的导管，导管中的止动件和可移动地容纳在导管中的主体，通常通过流体流动与止动件保持接合，并具有至少一个 磁响应材料的一部分。 电磁体位于管道外部，位于止动件上游相对于流体流动方向的位置，并且其电极定位成当其被通电时将磁力施加在身体的磁响应材料上。 斜坡电流发生器激励电磁体，以便逐渐增加其产生的磁力，直到磁力足以使身体抵抗流体流动并将身体吸引到两极之间的位置。 多圈传感器线圈或磁场传感器检测当身体离开停止物体并朝向电磁体移动时电磁体的磁通场的变化，并且输出感测信号，该传感信号又开始捕捉电磁体的测量 导致身体远离止动件吸引流体流动的力。
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公开(公告)号：US3662598A
公开(公告)日：1972-05-16
申请号：US3662598D
申请日：1971-04-07
申请人： JORDAN L SPENCER
发明人： SPENCER JORDAN L
CPC分类号： G01F1/00 , A61M5/16886 , G01F1/708
摘要： The present invention deals with an improved method and apparatus for measuring flow in fluid flow systems characterized by low flow rate. The invention utilizes the transit time or oscillatory frequency of a ball or float which moves along the direction of fluid flow and is returned to its original position by actuating a magnetic return system as it breaks a light beam or other sensing system. The cycle is repeated, with the transit time or oscillatory frequency being related to rate of fluid flow, and thus serving to indicate same for control purposes. The flow tube-ball measuring unit may take the form of a disposable insert into the flow measuring system.
摘要翻译： 本发明涉及用于测量以低流量为特征的流体流动系统中的流量的改进的方法和装置。 本发明利用沿着流体流动方向移动的球或浮子的传播时间或振荡频率，并且当其打破光束或其它感测系统时，通过致动磁性返回系统而返回到其原始位置。 重复该循环，其中通过时间或振荡频率与流体流动速率相关，因此用于指示相同的控制目的。 流量管球测量单元可以将一次性插入物的形式作为流量测量系统。
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