Ecole Polytechnique Federale De Lausanne

Sensile Pat Ag

Ecole Polytechnique Féderale De Lausanne (epfl)

Peter Ryser

Sigfrid Straessler

Josef Hilber

Jacques Jacot

Sigfrid Strässler

Klaus Ganz

The sensor system comprises an implantable sensor and a user device associated with it. A sensitive liquid is enclosed in the sensor, into which glucose can penetrate. The viscosity of the mixture of sensitive liquid and glucose is measured. The user device, which controls the measurement and its evaluation, is a portable device worn externally on the skin. The viscosity is measured based on the rotation of a measuring element driven by a driving magnet, both disposed in the sensor. The rotation of the measuring element is analyzed based on its decay behavior following switch-off of the driving magnet. In a second embodiment, the viscosity is measured based on the oscillatory behavior of an oscillating element excited to oscillate by a magnet, both disposed in the sensor. The oscillatory behavior is analyzed based on the decay behavior of the oscillating element following switch-off of the magnet.

Sensor system for determining the concentration of glucose in blood

A gas viscosity sensor comprises a signal processing circuit and a sensor element, including a gas pressure generating system and a differential pressure measuring system in fluid communication therewith, the differential pressure measuring system comprising a measuring chamber () bounded by a thin membrane (), an inlet-outlet channel or orifice interconnecting the measuring chamber to a source of gas for which the viscosity is to be determined, the inlet-outlet channel or orifice having dimensions adapted to provide resistance to the outflow and inflow of gas in the measuring chamber, and a membrane displacement sensor () adapted to measure a time dependent displacement of the membrane due to pressure variations in the measuring cavity.

Gas viscosity sensor

A pump system having a pump module () comprising a stator housing () with a chamber (), a rotor () rotatably and axially slidably received in the chamber and comprising a first axial extension () with a liquid supply channel () and a second axial extension with a liquid supply channel (), the first and second axial extensions having different diameters, and first and second sealing rings (), mounted around the first and second axial extensions.

Pump system

Growing community of inventors

Morges, Switzerland

Peter Ryser