Moisture sensor device and self-diagnosing method therefor
AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsToshikazu Itakura, Toshiki Isogai
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Abstract
A moisture sensor device includes a sensor portion having a capacitance that is varied in accordance with surrounding humidity, a signal processor for processing a detection signal of the sensor portion and outputting the signal corresponding to the humidity, a heating portion for heating the sensor portion, and a controller for controlling heating of the heating portion so that the capacitance of the sensor portion is substantially equal to a value under predetermined humidity at least during a self-diagnosis period.
Claims17
A moisture sensor device comprising:
- a sensor portion having a capacitance that is varied in accordance with surrounding humidity;
- a signal processor for processing a detection signal of the sensor portion and outputting the signal corresponding to the humidity;
- a heating portion for heating the sensor portion;
- and
- a controller for controlling heating of the heating portion so that the capacitance of the sensor portion is substantially equal to a value under predetermined humidity at least during a self-diagnosis period.
A self-diagnosing method for a moisture sensor device comprising:
- varying a capacitance of a sensor portion in accordance with surrounding humidity;
- and
- processing a detection signal of the sensor portion by a signal processor and outputting the signal corresponding to the humidity,
- wherein the varying of the capacitance of the sensor portion further comprises heating the sensor portion so that the capacitance of the sensor portion is substantially equal to a value under predetermined humidity, to thereby carrying out the self-diagnosis.
A moisture sensor device comprising:
- a sensor portion having a capacitance that varies in accordance with surrounding humidity;
- a signal processor for processing a detection signal of the sensor portion and outputting the signal corresponding to the humidity;
- and
- a heating portion for heating the sensor portion so that the capacitance of the sensor portion is substantially equal to a value under predetermined humidity at least during a self-diagnosis period.
Dependencies are inferred from the claim text.