Back projection imaging method, system, equipment and medium for defect detection of external insulation equipment in power systems

Abstract

This invention belongs to the field of external insulation equipment inspection technology, and discloses a back projection imaging method, system, equipment, and medium for defect detection of external insulation equipment in power systems. It addresses the problem of low imaging efficiency caused by the large amount of repetitive calculation of electromagnetic wave propagation paths in existing back projection imaging algorithms. The method utilizes the axisymmetric structural characteristics of the external insulation equipment. First, a reference detection orientation is selected to calculate its electromagnetic wave propagation path distribution. Then, this reference path distribution is rotated to other detection orientations to obtain the path distribution to be interpolated. Next, an inverse distance weighted interpolation method is used to accurately calculate the target pixels. Finally, the above steps are repeated to obtain path data for all detection orientations for imaging. This invention significantly reduces the repetitive calculation of electromagnetic wave propagation paths through parameter reuse, greatly improving the efficiency of back projection imaging while ensuring imaging accuracy, and meeting the needs of rapid on-site inspection of external insulation equipment in power systems.

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