G - Physics
01
F
G01F 3/20 (2006.01) G01F 1/54 (2006.01)
Patent
CA 2130945
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.
Measurement Technology International
Oyen Wiggs Green & Mutala
LandOfFree
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