Abstract:
Full-field deformation measurements plays a vital
role in designing, monitoring and retrofitting many engineering
products ranging from civil engineering structure to aerospace
applications. Optics-based measurements have gained a vast
popularity over last two decades. This paper attempts to establish
a method in measuring displacements in a 3D environment, using
optics-based measurements, in a cost-effective manner. The study
focuses on measuring displacements of a moving object with two
stationary cameras. Images acquired from two cameras are
processed through MATLAB software package and selected
region of the object is reconstructed in a virtual 3D environment
at each step. Digital image correlation technique is then adopted
to measure displacement by comparing the coordinates of
reconstructed objects in each step. It is shown that the
displacements can be measured to an accuracy of 0.15 mm (in 20
mm) for the selected object giving an accuracy of 98%.
Citation:
O. P. C. Randil and H. M. Y. C. Mallikarachchi, "3D Full-Field Deformation Measuring Technique with Optics-Based Measurements," 2018 Moratuwa Engineering Research Conference (MERCon), 2018, pp. 179-184, doi: 10.1109/MERCon.2018.8421930.