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公开(公告)号：EP0591190B1
公开(公告)日：1997-09-03
申请号：EP91913739.8
申请日：1991-06-24
发明人： INGMAN, Dov
摘要： The fluid flow meter (10) includes a flexible membrane (35) formed of a flexible material and containing an apparatus for providing the membrane (35) with resilience for undulation. The membrane (35) is mounted in the fluid flow path such that the pair of faces simultaneously define with the housing fluid impermeable seals (67) at the least two different locations along the flow path. The membrane (35) flexes so as to permit passage of discrete quanta (62a) of fluid, each having a known volume. The flow meter (10) generates electrical signals corresponding to flexure of the membrane (35), and the electrical signals are monitored for determining a fluid flow rate.
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公开(公告)号：EP0382818B1
公开(公告)日：1995-09-06
申请号：EP89907905.7
申请日：1989-06-20
发明人： INGMAN, Dov
IPC分类号： G01F3/20
摘要： A fluid flow meter comprising a housing having a pair of fluid port and defining therebetween a fluid flow path (14); a flexible membrane (35) defining a pair of opposing faces and being mounted in the fluid flow path such that the pair of faces simultaneously define with the housing fluid impermeable seals at at least two different locations along the flow path, the membrane (35) being operative to flex so as to permit passage therepast of discrete quanta of fluid, each having a known volume, apparatus for generating electrical signals corresponding to flexure of the membrane (35); and monitoring apparatus for receiving the electrical signals and thereby determining a fluid flow rate along the flow path.
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公开(公告)号：EP0699897A1
公开(公告)日：1996-03-06
申请号：EP94113734.1
申请日：1994-09-02
发明人： Ingman Dov
摘要： The fluid flow meter includes a flexible membrane clamped between upstream and downstream centering springs to enhance membrane behavior and extend the fluid flow measurement range by automatically adaptively moving the apparent clamping points in response to flow rate. Adaptation of the clamping span alters the relative effective excess membrane length within the clamping span to adapt membrane behavior to flow rate. The upstream centering spring includes a long leaf spring pair cantilevered into the clamping span from the clamping region. The long leaf spring pair is sandwiched within a shorter leaf spring pair active at higher flow rates and formed as part of a guide extending to the chamber surface. The membrane ends are narrowed upstream and downstream of the clamping span to reduce flutter while the upstream intake is split into even laminar flows. The fluid direction is substantially changed at the outlet to minimize membrane distortion.
摘要翻译： 流体流量计包括夹在上游和下游定心弹簧之间的柔性膜，以增强膜的性能并且通过响应流速自动地自适应地移动表观夹紧点来延伸流体流动测量范围。 夹紧范围的适应会改变夹紧范围内的相对有效过量膜长度，以使膜性能适应流速。 上游定心弹簧包括从夹紧区域悬伸到夹紧跨度中的长片弹簧对。 长的叶弹簧对被夹在较短的弹簧对中，在更高的流速下起作用，并形成为延伸到腔室表面的引导件的一部分。 膜端部在夹紧跨度的上游和下游变窄，以减少颤动，同时上游进口被分成均匀的层流。 流体方向在出口处基本上改变以最小化膜失真。
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