Patent ID: 9632047
Date: 2017-04-25
CPC Classifications: A47L,D06F,G01N

Claim:
1. A method of detecting properties of fluid media within a washing process of a washing device, using impedance spectroscopy, said method comprising the steps of: a) before commencement of said washing process, detecting an initial impedance curve over a frequency range of a test signal generator associated with said impedance spectroscopy, including a plurality of characteristic points on said initial impedance curve in a complex impedance plane, and determining an initial value for the properties of the fluid medium, b) determining respective surrounding frequency ranges around each of the characteristic points according to the initial impedance curve, c) conducting further detections of current impedance curves within the respective surrounding frequency ranges around the characteristic points of the initial impedance curve, d) determining respective characteristic points for the currently detected impedance curve within the surrounding frequency ranges of the initial impedance curve, e) determining differences between the characteristic points for each of the current detections of the impedance curve for at least one of the characteristic points and the respective corresponding characteristic point on the initial impedance curve, and comparing the difference with a predetermined reference range, and f) performing control measures on the washing process and continuing said washing process of the washing device if the difference is within the predetermined reference range.