Data acquisition method and system based on electric power acquisition terminal

The invention relates to the technical field of data processing, in particular to a data acquisition method and system based on an electric power acquisition terminal. The method comprises the following steps: acquiring a current time sequence of the electric energy meter, and presetting a search range of data points in the current time sequence; taking any data point as a target data point, and determining a stable feature of the target data point; obtaining a difference value between each data point in the search range of the target data point and a median in the search range, and determining discrete features of the target data point; taking a module of a two-dimensional vector formed by the stationary feature and the discrete feature of the target data point as a change feature of the target data point in the search range, and determining the expression degree of the target data point to the change feature; and the filtering coefficient of the target data point is calculated and non-local mean filtering i