Active approach for holographic nondestructive testing of satellite fuel tanks

Torsten Merz; Frank Elandaloussi; Dietrich W. Paulus; Wolfgang Osten

doi:10.1117/12.364258

21 September 1999 Active approach for holographic nondestructive testing of satellite fuel tanks

Torsten Merz, Frank Elandaloussi, Dietrich W. Paulus, Wolfgang Osten

Proceedings Volume 3824, Optical Measurement Systems for Industrial Inspection; (1999) https://doi.org/10.1117/12.364258
Event: Industrial Lasers and Inspection (EUROPTO Series), 1999, Munich, Germany

Abstract

In computer vision several views exist how to solve vision problems. The first general methodology was introduced by Marr; he proposed a data-driven and straightforward analysis strategy. Nowadays the concept of active vision introduced by Aloimonos et al. becomes more and more important. In contrast to Marr's philosophy, active vision implies a feedback loop which consists of sensors and active components. In this paper we present a system for the identification of material faults under the surface of a test object. For that purpose the specimen is elastically deformed, then the deformation is made visible using holographic interferometry, and finally flaw parameters are estimated using a model-based approach to analyze interferograms. This is an underconstrained computer vision problem which is regularized using a priori knowledge and an active modification of the experimental setup. More mathematically, this vision task can be seen in the context of inverse problem theory. In this contribution we describe the system and point out how it is related to the methodologies named above. To illustrate the functionality of the system, results are shown from nondestructive testing of satellite fuel tanks.

Citation Download Citation

Torsten Merz, Frank Elandaloussi, Dietrich W. Paulus, and Wolfgang Osten "Active approach for holographic nondestructive testing of satellite fuel tanks", Proc. SPIE 3824, Optical Measurement Systems for Industrial Inspection, (21 September 1999); https://doi.org/10.1117/12.364258

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