Acquisition unit and associated method of acquiring data from a rotating electric machine at a facility

Abstract

An acquisition unit that can write values of different parameters of an electric machine at the facility in different channels of a memory; obtain expected variation ranges for the different parameters; for each channel, calculate a difference between one or more recent values and one or more earlier values, compare the difference with the corresponding expected variation range, and trigger the transmission of the recent values, contextualized with a timestamp and a parameter ID, contingent upon the difference exceeding the corresponding expected variation range. The acquisition unit can refresh the one or more recent values in the channels based on a subsequent sampling of the signals; and repeat the steps of calculating, comparing, triggering and refreshing, in accordance with a rate of the sampling.