High-temperature video-extensometry for material testing of refractories

Peter Schalk; Ewald Fauster; Paul L. O'Leary

doi:10.1117/12.586737

24 February 2005 High-temperature video-extensometry for material testing of refractories

Peter Schalk, Ewald Fauster, Paul L. O'Leary

Proceedings Volume 5679, Machine Vision Applications in Industrial Inspection XIII; (2005) https://doi.org/10.1117/12.586737
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

Abstract

The motivation for this work arises from the need for a contactless extension measurement system to obtain material properties of refractories at elevated temperatures of up to 1400°C. There is a lack of tactile probes capable of performing reliable measurements at this temperature range. Presently, the deformation of the specimen is estimated by measuring the movement of the testing machine. To determine material properties such as the modulus of elasticity more accurate information about the real deformation is required. This work presents an optical arrangement and mechanical setup for image acquisition at high temperatures and at a high degree of thermal radiation. Furthermore, an efficient and stable image processing algorithm based on edge detection and line fitting using singular value decomposition is presented. Subsequently the sources of measurement errors are determined and examined. The accuracy of the measurement result is estimated.

Citation Download Citation

Peter Schalk, Ewald Fauster, and Paul L. O'Leary "High-temperature video-extensometry for material testing of refractories", Proc. SPIE 5679, Machine Vision Applications in Industrial Inspection XIII, (24 February 2005); https://doi.org/10.1117/12.586737

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