The Digital Image Correlation System in Experimental Tests of Beam Deflection

The paper presents information on the digital image correlation system, a contactless measurement technique which provides data on displacements of the recorded surface of the tested object. The system enables to test materials, elements and moderately large parts of structures for static and dynamic loadings, recording changes with a speed of even up to 1000Hz. In the paper authors presents analyses on system accuracy, in comparison to the beam theory, for different software adjustments on an example of a quasi-statically bended steel beam. The paper starts with introduction, presenting brief information on measurement techniques applied in civil engineering and accuracy issues concerning the system itself. Afterwards, a description of theoretical beam deflection axe and mathematical basics of the device with short description of the measurement preparations and testing procedure, are given. Finally results and conclusions are enclosing the paper.