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:
Sep. 25, 2001
Filed:
Jul. 13, 1999
Hyong-Tack Lim, Seoul, KR;
Hyong-Sup Kim, Seoul, KR;
Sang-Ho Seo, Seoul, KR;
Oh-Sung Kwon, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A method and apparatus for sensing the water level and vibration for a washing machine are disclosed. The method includes the steps of measuring a resonant frequency, when a water level of a washtub corresponds to the water level of zero and there is no wash within the washtub, in a water level sensor which converts the variation of water pressure according to the water level of the washtub into the resonant frequency and senses the water level as the converted resonant frequency, setting the measured resonant frequency as a reference resonant frequency, measuring the resonant frequency from the water level sensor, during a dehydration operation among washing operations, and obtaining a deviation of the measured resonant frequency from the reference resonant frequency, and comparing the deviation of the measured resonant frequency from a deviation of the reference resonant frequency to determine whether the dehydration operation is continued, for thereby achieving an optimal washing operation, wherein the method is comprised of the step of sensing the excessive vibration within the washing machine only with an output of existing water level sensor, without having a mechanical vibration sensor.