The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2015
Filed:
Apr. 26, 2010
Jun Fu, Beijing, CN;
Wei Chang, Beijing, CN;
Lianbo Yu, Beijing, CN;
BEIJING POLYMER SENSING TECHNOLOGY CO., LTD., Beijing, CN;
Abstract
A humidity measurement device comprises a capacitance measurement unit () and a microcontroller (). The capacitance measurement unit () is used to output a frequency signal of a humidity-sensitive capacitor (C) by the humidity-sensitive capacitor (C) and a frequency signal of a reference capacitor (C) by the reference capacitor (C) respectively. The microcontroller () is used to obtain a frequency value of the humidity-sensitive capacitor (C) and a frequency value of the reference capacitor (C) based on the frequency signal of the humidity-sensitive capacitor (C) and the frequency signal of the reference capacitor (C), and obtain a current ambient humidity value by using a linear function relationship of a frequency difference between the humidity-sensitive capacitor (C) and the reference capacitor (C) and a humidity value. A humidity measurement method includes using the said humidity measurement device to measure a current ambient humidity value.