Control of the injection of a liquid onto a test support
AssigneeWithings
InventorsAntoine MERLOT, Brice BRAC DE LA PERRIÈRE
Life of this patent
Estimating the term…
Abstract
An injection control method for injecting a liquid onto a test support, the test support comprising an absorbent material capable of absorbing the liquid and a reagent capable of reacting with at least one component present in the liquid, the method being implemented using an injector and an optical sensor.
Claims20
An injection control method for a liquid on a test support, the test support comprising an absorbent material adapted to absorb the liquid and a reagent adapted to react with at least one component present in the liquid, the method being implemented using an injector and an optical sensor, the method comprising:
- injecting the liquid onto the absorbent material of the test support by the injector,
- calculating a change in a value of a physical property using the optical sensor of a control region of the test support during the injection,
- in response to determining that the variation is less than a threshold, ending the injection.
A method of controlling delivery of urine to a test support in a urine analysis system, the method comprising:
- causing an injector to deliver urine to a test support that includes an absorbent material;
- obtaining, using an optical sensor, a plurality of optical measurements associated with a control region of the test support at different times during said delivery;
- determining, by control circuitry based on the plurality of optical measurements, successive values of a monitored metric representative of a physical property of the control region;
- computing, by the control circuitry, a change value indicative of an amount of change of the monitored metric between the successive values;
- comparing the change value to a threshold;
- and
- controlling the injector based on the comparing, including stopping the delivery of urine in response to determining that the change value is below the threshold, thereby indicating saturation of the control region.
Dependencies are inferred from the claim text.