From the Skin-Depth Equation to the Inverse RFEC Sensor Model
Abstract
In this paper, we tackle the direct and inverse problems for the Remote-Field Eddy-Current (RFEC) technology. The direct problem is the sensor model, where given the geometry the measurements are obtained. Conversely, the inverse problem is where the geometry needs to be estimated given the field measurements. These problems are particularly important in the field of Non-Destructive Testing (NDT) because they allow assessing the quality of the structure monitored. We solve the direct problem in a parametric fashion using Least Absolute Shrinkage and Selection Operation (LASSO). The proposed inverse model uses the parameters from the direct model to recover the thickness using least squares producing the optimal solution given the direct model. This study is restricted to the 2D axisymmetric scenario. Both, direct and inverse models, are validated using a Finite Element Analysis (FEA) environment with realistic pipe profiles.
Cite
@article{arxiv.1609.04810,
title = {From the Skin-Depth Equation to the Inverse RFEC Sensor Model},
author = {Raphael Falque and Teresa Vidal-Calleja and Gamini Dissanayake and Jaime Valls Miro},
journal= {arXiv preprint arXiv:1609.04810},
year = {2016}
}
Comments
Submitted and accepted to the 14th International Conference on Control, Automation, Robotics and Vision (ICARCV 2016)