A method of determining changes in stationary states of a signal

摘要

The present disclosure relates to a method of determining changes in stationary states of a signal, wherein the signal may be of an accelerometer located on a vibrating machine or a sound signal measured by a microphone placed nearby a vibrating machine. The method comprising: receiving a plurality of sets of values, each set of values comprising at least one value of the signal; for each set of values among the plurality of sets of values, determining a respective first measure of statistical dispersion. determining a second measure of statistical dispersion for a subset of first measures of statistical dispersion among the determined first measures of statistical dispersion; and determining an exit from a stationary state of the signal by comparing the determined second measure with a predetermined threshold.