A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/168 (2006.01) G01F 1/00 (2006.01) G01F 1/34 (2006.01) G01F 1/86 (2006.01) G01F 1/90 (2006.01)
Patent
CA 2165422
A non-invasive technique and system is provided for measuring flow of liquid driven by a flexible diaphragm of a membrane pump (18). Flow, pressure and/or temperature of a gas, such as air, used to drive the pump (18) is continuously monitored. Instantaneous volume of liquid being pulled into or out of a chamber of the pump (18) can be calculated from measured values of the gas used to drive the pump (18). Sensors (10, 12 and/or 14) are used to measure values relating to the gas. The sensed parameters are concurrently monitored and continuously determine the amount of gas flowing to and from the diaphragm of the membrane pump (18) utilized to move liquid within a liquid pathway. The measurement may then be used to calculate the instantaneous flow rate of the liquid.
Technique et système non invasifs de mesure du flux de liquide déplacé par une pompe à membrane (18). Le débit, la pression et/ou la température du gaz (par exemple de l'air) actionnant la pompe sont mesurés en continu, ce qui permet de calculer le volume instantané du liquide transitant dans la chambre de la pompe (18). Les mesures relatives au gaz sont effectuées par des capteurs (10, 12 et/ou 14). Les paramètres mesurés, corrélés pour déterminer en continu la quantité de gaz entrant et sortant agissant sur la membrane pour refouler le liquide dans un conduit, permettent de calculer le débit instantané de la pompe.
Packard Warren J.
Pawlak Kenneth E.
Baxter International Inc.
Sim & Mcburney
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