A theoretical procedure for detection of simulated cracks in a pipe by the direct current-potential drop technique

摘要

Based on the direct current-potential drop (dc-pd) technique, an efficient theoretical detection procedure is developed to identify the existence of simulated cracks in a pipe. By this procedure, the electric potential on a 'pseudo' perfect pipe needs to be calculated in advance by finite element method. The proposed defect influence factor, which is defined as the ratio of the electric potential of the defective pipe divided by that of the 'pseudo' perfect one, is then employed to reveal the effect of cracks on the electric potential.