Title:
ELECTRONIC CONTROL METHOD AND SYSTEM FOR A PIEZO-ELECTRIC PUMP
Document Type and Number:
WIPO Patent Application WO/2012/085814
Kind Code:
A3
Abstract:
A method for actuating a pumping device with an optimal driving voltage, wherein the pumping device comprises a pumping chamber (4) having a pumping membrane (1), an inlet (3) and an outlet chamber (5), a voltage controlled actuator (6) connected to said pumping membrane (1), said pumping membrane reaching a stop position defined by a mechanical stop (2) a sensor for determining whether the pumping membrane has reached said mechanical stop (2); said method comprising a learning and working phase, wherein the learning phase comprises the following steps -) actuation of the pumping membrane (1) by applying a predetermined actuation voltage Vact to the actuator (6) said pumping membrane (1) reaching said position in an over-actuation step or not reaching said mechanical stop (2) position in an under-actuation process; -) after the over-actuation step, decreasing the voltage so that the pumping membrane (1) has left said mechanical stop (2) position and storing as the optimal voltage Vact optimal or -) in the under-actuation step, increasing the voltage so that the pumping membrane (1) reaches said mechanical stop (2) position and storing as the optimal voltage Vact optimal -) actuating the pumping device in the working phase with the determined optimal voltage value Vact optimal.
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Inventors:
NOTH ANDRE (CH)
CHAPPEL ERIC (FR)
CHAPPEL ERIC (FR)
Application Number:
PCT/IB2011/055771
Publication Date:
December 27, 2012
Filing Date:
December 19, 2011
Export Citation:
Assignee:
DEBIOTECH SA (CH)
NOTH ANDRE (CH)
CHAPPEL ERIC (FR)
NOTH ANDRE (CH)
CHAPPEL ERIC (FR)
International Classes:
F04B43/04; F04B49/06
Foreign References:
| US5759015A | 1998-06-02 | |||
| US6280148B1 | 2001-08-28 | |||
| US5271724A | 1993-12-21 | |||
| US5085562A | 1992-02-04 |
Attorney, Agent or Firm:
GROSFILLIER, Philippe (chemin des Charmettes 9 P.O Box 5107, Lausanne, CH)
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