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About

B. A. Auld made significant contributions to the field of electromagnetic sensing, with a research focus spanning eddy-current probes, capacitive sensor arrays, and robotic sensing technologies. Working primarily in the late 1980s, Auld developed and refined theoretical frameworks and experimental methods for reflection-type eddy-current probes, applying a general ΔZ theory to characterize surface-connected flaws in materials — work that proved valuable for nondestructive evaluation and automated inspection. His finite-difference implementations bridged theoretical modeling with practical experimental validation, lending rigor to probe design and signal analysis. Auld also made notable advances in capacitive sensing, designing variable geometry capacitive arrays capable of robotic proximity detection and feature recognition. These probes, built from alternating metallic strip electrodes operating in both sum and differential modes, demonstrated versatility across multiple sensing tasks. His development of a novel five-coil eddy-current probe capable of simultaneous multi-function sensing further underscored his drive to create practical tools for automated manufacturing environments. Collectively, Auld's work garnered citations across multiple related publications, reflecting sustained interest from researchers in nondestructive testing and robotics. His contributions helped lay groundwork for intelligent electromagnetic sensor systems that continue to influence industrial inspection and robotic perception research.