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Title:
MEASURING METHOD AND PORTABLE MEASURE BENCH FOR LIQUID MICRO-FLOWS, AND APPLICATION FOR CHARACTERISING MICRO-PUMPS FOR MEDICAL USE
Document Type and Number:
WIPO Patent Application WO/2010/084268
Kind Code:
A8
Abstract:
The purpose of the invention is to provide reliable and precise values for liquid micro-flows supplied by a pump (30) using a customised follow-up for detecting operational irregularities in a quasi-instantaneous manner and under variable temperature and/or atmospheric pressure conditions. Accordingly, the invention provides (10) coupling two complementary measurement means, i.e. an average measurement and an instantaneous measurement of the flow. In one embodiment, the micro-pump (30) to be tested is arranged in a housing (20) and comprises temperature and pressure control means (22, 24) for making at least two complementary measurements of the flows, i.e. average and instant flows, following a gas micro-bubble (119) in a micro-pipette (120). The bubble is inserted into the liquid by an injection pad (110) provided with a pressure sensor (112) dedicated to the measurement of the counter-pressure of the pump (30). The flow measurements are respectively made by two optical sensors (124a, 124b) and a camera (126) that transmit the data to a data processing unit (129). The pump (30) is connected on a connection pad (100, 102, 104) of a specific sensor (106) for measuring the clogging pressure. The counter-pressure is adjusted at the outlet of the micro-pipette (120) by a variable opening (130) controlled by the processing unit (129).

Inventors:
COLIN STEPHANE (FR)
BARROT CHRISTINE (FR)
LAURIEN NICOLAS (FR)
BALDAS LUCIEN (FR)
FORET DIDIER (FR)
CASANOVA FREDERIC (FR)
THUILLART OLIVIER (FR)
Application Number:
PCT/FR2010/000049
Publication Date:
December 09, 2010
Filing Date:
January 19, 2010
Export Citation:
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Assignee:
INST NAT SCIENCES APPLIQ (FR)
UNIV TOULOUSE (FR)
SADIR ASSISTANCE (FR)
FEDERATION ANTADIR (FR)
COLIN STEPHANE (FR)
BARROT CHRISTINE (FR)
LAURIEN NICOLAS (FR)
BALDAS LUCIEN (FR)
FORET DIDIER (FR)
CASANOVA FREDERIC (FR)
THUILLART OLIVIER (FR)
International Classes:
G01F1/7086; A61M5/168; F04B19/00
Attorney, Agent or Firm:
NOVAGRAAF TECHNOLOGIES (Levallois-Perret Cedex, Levallois-Perret Cedex, FR)
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