The A.C. Field Measurement technique was originally developed as a non-contacting version of the A.C. Potential Drop technique, with the aim of accurately measuring the depth of surface-breaking fatigue cracks at welds underwater. Since then, the technique has expanded into many diverse applications, both underwater and in air. This paper describes the evolution of ACFM equipment from the first...

A multi-user integrated suite of instruments designed to optimize the search for evidence of life on Mars is described. The package includes: -Surface inspection and surface environment analysis to identify the potential Mars landing sites, to inspect the surface geology and mineralogy, to search for visible surficial microbial macrofossils, to study the surface radiation budget and surface oxi...

Industrial computed tomography (CT) has opened a new paradigm in product inspection fields. In contrary to other 3D inspection devices, industrial CT systems can completely digitize the interior as well as the exterior of nearly any object. Without any destructive testing, an object’s failures can be detected by volume data analysis from industrial CT scan data. In this paper, we present a set ...

The usefulness of advanced machine vision techniques for automated inspection is restricted by long development cycles for the inspection software and a lack of general applicability of the resulting system. These difficulties arise because in the majority of cases the particulars of the inspection are embedded in the software structure resulting in severe restrictions on user reconfiguration. ...

The usefulness of advanced machine vision techniques for automated inspection is restricted by long development cycles for the inspection software and a lack of general applicability of the resulting system. These diiculties arise because in the majority of cases the particulars of the inspection are embedded in the software structure resulting in severe restrictions on user reconnguration. Thi...

Surface damage on honeycomb aircraft panels is often measured manually, and is therefore subject to variation based on inspection personnel. Eddy current testing (ECT) is sensitive to variations in probe-to-specimen spacing, or lift-off, and is thus promising for high-resolution profiling of surface damage on aluminum panels. Lower frequency testing also allows inspection through the face sheet...

The evaluation method of yarn surface quality currently in use is mainly based on manual inspection. In order to resolve the inherent limitations of the human visual inspection, an intelligent evaluation system has been developed for the objective and automatic evaluation of yarn surface quality with computer vision and artificial intelligence. In this system, all yarn surface features are full...

Delayed coke drums are operated under severe conditions of cyclic heating and forced cooling that apply repetitive thermal stresses to the drum walls. It has long been recognized that the ultimate failure mechanism for coke drums is weld cracking due to low cycle fatigue caused by these thermal stresses. It is also known that coke drums distort and bulge in service and that these bulges can be ...