Apparatus and method for detection of a leak in a pump membrane

F - Mech Eng,Light,Heat,Weapons – 04 – B

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F04B 51/00 (2006.01) F04B 43/00 (2006.01)

Patent

CA 2351645

Method for detection of fluid leakage through a membrane in a fluid flow control system. The fluid flow control system has a first chamber and a second chamber. A membrane is disposed between the first chamber and the second chamber. The second chamber has a connection to a pressure tank, the pressure tank has a fluid with a pressure, and the connection defines a fluid path. The method includes in a first step blocking the fluid path. The pressure of the fluid in the pressure tank is then adjusted. The rate of change of pressure is measured in the pressure tank. A blocked pressure rate is calculated. Next, the fluid path is unblocked. The rate of pressure change is measured within the pressure tank. An unblocked pressure rate is calculated. Finally a leakage rate is calculated based on the blocked pressure rate and the unblocked pressure rate.

La présente invention concerne un procédé de détection de fuite de liquide à travers une membrane dans un système de régulation de débit de fluide. Le système de régulation de débit de fluide présente une première chambre et une seconde chambre. Une membrane est placée entre ces deux chambres. La seconde chambre présente une connexion à un réservoir sous pression, ce réservoir contenant un fluide sous pression, la connexion définissant un passage de fluide. Le procédé consiste d'abord à bloquer le passage de fluide. La pression du fluide dans le réservoir de fluide est ensuite ajustée. On mesure le taux de changement de pression dans le réservoir sous pression. Un taux de pression à l'état bloqué est calculé. Le passage de fluide est alors débloqué. Le taux de changement de pression dans le réservoir sous pression est mesuré. On calcule un taux de pression à l'état débloqué. Enfin, un débit de fuite est calculé sur la base des taux de pression à l'état bloqué et à l'état débloqué.

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