Tsinghua University

Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd.

Shengli Oilfield Branch Company of China Petroleum Chemical Co., Ltd.

Yongtai Sun

Wei Zhao

Songling Huang

Shen Wang

Huanquan Sun

Laiju Han

Shihua Zhang

An imaging method and an imaging apparatus based on a magnetic flux leakage testing. The imaging method includes: selecting an imaging region having a corrosion defect on a pipeline to be tested; dividing the imaging region into a plurality of grid areas; scanning by a three-dimensional sensor array the pipeline to be tested so as to obtain magnetic flux leakage testing data; creating a three-dimensional orthogonal coordinate system in the imaging region, defining a first two-dimensional matrix of defect images according to the plurality of grid areas based on the three-dimensional orthogonal coordinate system, and creating a second two-dimensional matrix of magnetic flux leakage signals according to the magnetic flux leakage testing data based on the three-dimensional orthogonal coordinate system; and mapping the second two-dimensional matrix to the first two-dimensional matrix using a pre-trained wavelet neural network so as to image the corrosion defect.

Imaging method and apparatus based on magnetic flux leakage testing

Growing community of inventors

Dongying, China

Yongtai Sun