Abstract
Based on the principle of electromagnetic eddy current testing, aiming at the problems of heavy workload and difficult location of defects in the periodic inspection of buried pipelines, the eddy current distribution of pipelines, probes, and defects is modeled and simulated by using ANSYS EM simulation software, the correlation model between pipeline parameters, excitation signals, and received signals is established, and the quantitative relationship between pipeline wall thickness parameters and eddy current distribution is clarified. Based on the accuracy and engineering application ability, the through pipe wall thickness detection device is optimized, and the structure of the eddy current probe is improved. The experimental results show that the improved eddy current probe can improve the detection accuracy of 6.9% in detecting the induced eddy rheology in the workpiece and effectively improve the efficiency of pipe wall thickness defect location and pipe radius detection, which can provide a new reference for the regular detection and troubleshooting of buried pipelines.
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