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:
Feb. 18, 2014
Filed:
Feb. 18, 2010
Sergey Argudayev, St. Petersburg, RU;
Vladimir Gerasimov, St. Petersburg, RU;
Roberto Giordano, Pozzuolo del Fruili, IT;
Sergey Argudayev, St. Petersburg, RU;
Vladimir Gerasimov, St. Petersburg, RU;
Roberto Giordano, Pozzuolo del Fruili, IT;
Electrolux Home Products Corporation N.V., Brussels, BE;
Abstract
The present invention relates to an apparatus for estimating the air humidity within an oven cavity () by using ultrasound waves with at least two different frequencies (f, f). Said apparatus comprises at least one ultrasound transmitter () for generating the ultrasound waves, at least one ultrasound receiver () for receiving the ultrasound waves and at least one phase detecting device for detecting the phase (φ, φ) of the ultrasound wave at the ultrasound receiver () relative to the same ultrasound wave with the same frequency (f, f) at the ultrasound transmitter (). Said apparatus comprises further at least one evaluation unit for calculating the velocity (V) of the ultrasound waves on the basis of the phases (φ, φ) and frequencies (f, f) of the ultrasound waves with the two different frequencies (f, f), at least one temperature sensor () for detecting the temperature (T) in the oven cavity () and at least one estimation unit for estimating the humidity in the oven cavity () on the basis of the temperature (T) and the velocity (V) of the ultrasound waves. Further, the present invention relates to a corresponding method for estimating the air humidity within an oven cavity ().