Analog quantity acquisition method and system based on configurable channel type

The invention relates to the technical field of fault recording in a power system, in particular to an analog quantity acquisition method and system based on configurable channel types. Comprising the following steps: acquiring and analyzing an acquisition demand, dynamically adjusting internal channel configuration, activating a corresponding analog quantity acquisition channel to acquire an analog signal, converting the analog signal into a digital signal, and further performing time domain and frequency domain preprocessing; decomposing the preprocessed signal into a plurality of intrinsic mode functions, and extracting time-varying features of the intrinsic mode functions; performing multi-layer nonlinear conversion on the time-varying features to obtain converted feature vectors; fusing the converted feature vectors to obtain a high-dimensional feature matrix; and representing the high-dimensional feature matrix as a sparse feature vector, analyzing and classifying the sparse feature vector, and judging