Carbon nanotube dewpoint and ice condition sensor
First Claim
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1. An apparatus for detection of a dew point of an ambient gas containing moisture and of an icing condition, the apparatus comprising:
- a sensor comprising an activated carbon nanotube (CNT) having a resistance that varies in proportion to humidity of the ambient gas;
a signal conditioner; and
a data acquisition device configured to monitor the resistance of the activated CNT during temperature change of the sensor to identify a peak resistance of the activated CNT positioned in the ambient gas, wherein the peak resistance of the activated CNT indicates icing of moisture in the ambient gas, and the data acquisition device further configured to identify a maximum rate of increase in said resistance verses the temperature change, which is indicative of a temperature of a dew point.
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Abstract
Disclosed is a dewpoint and icing condition detection apparatus that includes a sensor, a signal conditioner and a data acquisition device. The sensor is a carbon nanotube sensor having a resistance that varies in proportion to a change in humidity of a gas flow across the sensor.
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5 Claims
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1. An apparatus for detection of a dew point of an ambient gas containing moisture and of an icing condition, the apparatus comprising:
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a sensor comprising an activated carbon nanotube (CNT) having a resistance that varies in proportion to humidity of the ambient gas; a signal conditioner; and a data acquisition device configured to monitor the resistance of the activated CNT during temperature change of the sensor to identify a peak resistance of the activated CNT positioned in the ambient gas, wherein the peak resistance of the activated CNT indicates icing of moisture in the ambient gas, and the data acquisition device further configured to identify a maximum rate of increase in said resistance verses the temperature change, which is indicative of a temperature of a dew point. - View Dependent Claims (2, 3, 4, 5)
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Specification