IERUS Technologies, under subcontract to Tethers Unlimited, is developing a machine vision inspection system for thevalidation of metallic components additively manufactured in space. The effort has begun with a survey of visiontechnologies, including stereo vision, structure from motion, light field imaging, and structured illumination. Using theoptical data, 3D point clouds will be registered as the object is viewed from multiple orientations. From the point clouddata, a mix of deterministic and machine learning algorithms will be used to identify geometric primitives that can becompared to those included in the computer aided design model. In addition, the system will estimate the surfaceroughness. Based upon the tolerances required within the CAD, pass/fail criteria will be established and the system willdetermine if the part passes, fails, or cannot be determined. At the end of the current phase, IERUS will perform ademonstration using a prototype system on a challenge artifact provided by NASA.
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