METHOD AND SYSTEM FOR DETERMINING OIL QUALITY

摘要

A method for determining quality of lubricating oil includes positioning first and second electrodes (17) in the oil (12), wherein the electrodes (17) are coated with an electrically insulating material; applying a symmetrically balanced time-varying potential to the electrodes, the potential having a predetermined amplitude; sweeping (202) the potential over a range of frequencies from a first frequency to a second frequency greater than the first frequency; monitoring (204) magnitude of amplitude modulation of the potential over the range of frequencies; and determining (210) the quality of the oil based on variation of the amplitude modulation. A system for practicing the method is also provided.