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US 2017/0254737 A1Published application
Sensor system and sensing method
AssigneeKoninklijke Philips N.V.
InventorsRUI KE, CORNELIS REINDER RONDA
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Abstract
A sensor system is for sensing a substance in a fluid (1), comprising a first sensor (10) and a second sensor (12) of the same type. The first sensor (10) is used until a calibration event, during which the second sensor (12) is used. The second sensor (12) is used only during the calibration event. The first sensor (10) is calibrated using the sensor information from the second sensor (12).
Claims13
A sensor system for determining the status of a filter, comprising:
- a first sensor for sensing the substance in the fluid;
- a second sensor for sensing the substance in the fluid, the second sensor being of the same type as the first sensor and for sensing the same substance;
- and
- a controller adapted to:
- control the first sensor to sense the substance in the fluid, until a calibration event;
- during the calibration event, control the second sensor to sense the substance in the fluid, the second sensor being operated only during the calibration event;
- calibrate the first sensor using the sensor information from the second sensor,
- a first filter coupled to the first sensor and a second filter coupled to the second sensor;
- the sensor system is configured to route fluid filtered by the first and second filters to one of the first and second sensors in turn, and to determine a status of the first filter based on a difference between signals from the first and the second sensor.
6 more elements
A sensing method for determining the status of a filter, comprising:
- sensing a substance in a fluid using a first sensor until a calibration event;
- during the calibration event, sensing the substance using a second sensor, the second sensor being of the same type as the first sensor and for sensing the same substance, the second sensor being operated only during the calibration event;
- and
- calibrating the first sensor using the sensor information from the second sensor;
- and
- filtering the fluid before supply to the first sensor using a first filter and filtering the fluid before supply to the second sensor using a second filter, wherein the method further comprises:
- performing a test of the first filter by routing fluid filtered by the first and second filters to one of the first and second sensors in turn, and determining a first filter status based on a difference between signals from the first and the second sensors.
4 more elements
Dependencies are inferred from the claim text.