HUMIDITY MEASUREMENT DEVICE AND METHOD

A humidity measurement device comprises a capacitance measurement unit (101) and a microcontroller (102). The capacitance measurement unit (101) is used to output a frequency signal of a humidity-sensitive capacitor (C1) by the humidity-sensitive capacitor (C1) and a frequency signal of a reference...

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Bibliographic Details
Main Authors YU, LIANBO, CHANG, WEI, FU, JUN
Format Patent
LanguageChinese
English
French
Published 30.06.2011
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:A humidity measurement device comprises a capacitance measurement unit (101) and a microcontroller (102). The capacitance measurement unit (101) is used to output a frequency signal of a humidity-sensitive capacitor (C1) by the humidity-sensitive capacitor (C1) and a frequency signal of a reference capacitor (C2) by the reference capacitor (C2) respectively. The microcontroller (102) is used to obtain a frequency value of the humidity-sensitive capacitor (C1) and a frequency value of the reference capacitor (C2) based on the frequency signal of the humidity-sensitive capacitor (C1) and the frequency signal of the reference capacitor (C2), and obtain a current ambient humidity value by using a linear function relationship of a frequency difference between the humidity-sensitive capacitor (C1) and the reference capacitor (C2) and a humidity value. A humidity measurement method includes using the said humidity measurement device to measure a current ambient humidity value. Le dispositif de mesure d'humidité selo
Bibliography:Application Number: WO2010CN72195