Exploring Alternative Current Injection Patterns in ERT to Enhance Central Sensitivity: A Multi-Injection Measurement Strategy

Abstract

Electrical Resistance Tomography (ERT) is a promising imaging technique for industrial applications, yet it suffers from low sensitivity in the central region of the imaging domain, limiting its effectiveness in detecting internal anomalies. To address this challenge, a novel multi-injection strategy is proposed and investigated in this study. Simulation results demonstrate that the new strategy enhances detection capability in the central region compared to conventional approaches. However, the reconstructed images show minimal improvement over the conducting boundary method due to the inherent limitations of the Linear Back Projection (LBP) algorithm, which yields low-resolution outputs. These findings highlight the potential of advanced injection strategies while underscoring the need for improved reconstruction algorithms to fully realize their benefits.