APPARATUS AND METHOD FOR IDENTIFYING POSSIBLE DEFECT INDICATORS FOR A VALVE BY USING WAVELET DECOMPOSITION

摘要

A method and an apparatus are provided for identifying possible indicators of a defective valve. The method and the apparatus decompose a signal having a plurality of process variable measurements into a plurality of resolution levels. The process variable measurements are associated with operation of a valve. The method and the apparatus group the resolution levels into a plurality of groups. The method and the apparatus identify one or more defect indicators for at least some of the resolution levels using the groups. The one or more defect indicators are associated with a possible defect in the valve.