Method for carrying out circumferential angle classification on pipeline defects obtained by eddy current testing

The invention discloses a method for carrying out circumferential angle classification on pipeline defects obtained by eddy current testing, and belongs to the technical field of pipeline eddy currenttesting. The method comprises the following steps: building a pipeline eddy current detection platform; reflecting defects by detecting a change curve of a pipeline signal along the circumferential direction; and calculating correlation coefficients of the characteristic signals and the defect sizes under different frequencies, selecting the characteristic signal with the maximum correlation coefficient with the defect circumferential angle as an input characteristic signal of a K-means clustering algorithm based on a correlation analysis result, and classifying the circumferential angles ofthe pipeline defects. According to the method, the characteristic signal with a large correlation coefficient with the circumferential angle of the defect is selected as input of the K-means clustering algorithm, so that corre