Model the Effects of Core/Coil Size and Defect Length on Eddy Current Response

Prior split D differential probe validation studies have consistently shown model discrepancy in transition regions between the main peaks of the probe response. These discrepancies may be the result of differences in probe input dimensions, numerical error in the simulation code, or unforeseen variables in the experimental setup and data collection. This paper will investigate the effect of improved dimensional modeling, core size, and defect length have on reducing the discrepancy between model and experiment. A complete description of the experimental and modeling study will be presented. Comparisons will be made between the experimental data and the simulated results and conclusions will be presented. The study should provide insight into how probe and defect dimensions affect the simulated response of a probe. Also it will detail how the inclusion of asymmetry into model could improve agreement.